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The inflammable truth of atherosclerosis - Thesis (complete)

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UvA-DARE is a service provided by the library of the University of Amsterdam (https://dare.uva.nl)

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The inflammable truth of atherosclerosis

Verweij, S.L.

Publication date

2018

Document Version

Final published version

License

Other

Link to publication

Citation for published version (APA):

Verweij, S. L. (2018). The inflammable truth of atherosclerosis.

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THE INFLAMMABLE TRUTH OF

ATHEROSCLEROSIS

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Colofon

ůůƌŝŐŚƚƐƌĞƐĞƌǀĞĚ͘EŽƉĂƌƚƐŽĨƚŚŝƐƉƵďůŝĐĂƟŽŶŵĂLJďĞƌĞƉƌŽĚƵĐĞĚŽƌƚƌĂŶƐŵŝƩĞĚŝŶĂŶLJ ĨŽƌŵŽƌďLJĂŶLJŵĞĂŶƐǁŝƚŚŽƵƚƚŚĞƉĞƌŵŝƐƐŝŽŶŽĨƚŚĞĂƵƚŚŽƌ͘

Author: Simone Verweij Cover: Caroline Bruikman >ĂLJŽƵƚ͗^ŝŵŽŶĞsĞƌǁĞŝũ WƌŝŶƟŶŐ͗ZŝĚĚĞƌƉƌŝŶƚ ISBN-978-94-6375-001-1 &ŝŶĂŶĐŝĂůƐƵƉƉŽƌƚďLJƚŚĞƵƚĐŚ,ĞĂƌƚ&ŽƵŶĚĂƟŽŶĨŽƌƚŚĞƉƵďůŝĐĂƟŽŶŽĨƚŚŝƐƚŚĞƐŝƐŝƐŐƌĂƚĞĨƵůůLJ acknowledged. &ƵƌƚŚĞƌ ĮŶĂŶĐŝĂů ƐƵƉƉŽƌƚ ĨŽƌ ƉƌŝŶƟŶŐ ƚŚŝƐ ƚŚĞƐŝƐ ǁĂƐ ŬŝŶĚůLJ ƉƌŽǀŝĚĞĚ ďLJ ƚŚĞ D͕ tĞƐƞƌŝĞƐŐĂƐƚŚƵŝƐ͕ ŚŝƉƐŽŌ͕ ^ĂŶŽĮ ĂŶĚ ^ƟĐŚƟŶŐ ƚŽƚ ^ƚĞƵŶ WƌŽŵŽǀĞŶĚŝ sĂƐĐƵůĂŝƌĞ Geneeskunde.

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THE INFLAMMABLE TRUTH OF

ATHEROSCLEROSIS

D/^,WZK&^,Z/&d

ter verkrijging van de graad van doctor aan de Universiteit van Amsterdam

ŽƉŐĞnjĂŐǀĂŶĚĞZĞĐƚŽƌDĂŐŶŝĮĐƵƐ ƉƌŽĨ͘Ěƌ͘ŝƌ͘<͘/͘:͘DĂĞdž

ƚĞŶŽǀĞƌƐƚĂĂŶǀĂŶĞĞŶĚŽŽƌŚĞƚŽůůĞŐĞǀŽŽƌWƌŽŵŽƟĞƐŝŶŐĞƐƚĞůĚĞĐŽŵŵŝƐƐŝĞ͕ in het openbaar te verdedigen in de Agnietenkapel

ŽƉǁŽĞŶƐĚĂŐϱƐĞƉƚĞŵďĞƌϮϬϭϴ͕ƚĞϭϰ͗ϬϬƵƵƌ

door

Simone Léonie Verweij

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WƌŽŵŽƟĞĐŽŵŵŝƐƐŝĞ͗ WƌŽŵŽƚŽƌ͗  WƌŽĨ͘Ěƌ͘͘^͘'͘^ƚƌŽĞƐ  DͲhǀ ŽƉƌŽŵŽƚŽƌĞƐ͗  ƌ͘^͘:͘ĞƌŶĞůŽƚDŽĞŶƐ  DͲhǀ    ƌ͘,͘:͘sĞƌďĞƌŶĞ  DͲhǀ KǀĞƌŝŐĞůĞĚĞŶ͗  WƌŽĨ͘Ěƌ͘:͘ŽŽŝũ   DͲhǀ    WƌŽĨ͘Ěƌ͘:͘:͘WŝĞŬ   DͲhǀ    WƌŽĨ͘Ěƌ͘&͘:͘ĞŵĞůŵĂŶ  DͲhǀ    WƌŽĨĚƌ͘D͘W͘:͘ĚĞtŝŶƚŚĞƌ DͲhǀ

Prof. dr. P. Knaapen Vrije Universiteit Amsterdam

   ƌ͘:͘͘ǀĂŶƵƵů   ^ĂŶƋƵŝŶ

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TABLE OF CONTENTS

ŚĂƉƚĞƌϭ 'ĞŶĞƌĂůŝŶƚƌŽĚƵĐƟŽŶĂŶĚŽƵƚůŝŶĞŽĨƚŚĞƚŚĞƐŝƐ  ϵ WĂƌƚ/  /ŵĂŐŝŶŐŽĨŵƵůƟͲůĞǀĞůŝŶŇĂŵŵĂƟŽŶŝŶĐĂƌĚŝŽǀĂƐĐƵůĂƌĚŝƐĞĂƐĞ ŚĂƉƚĞƌϮ dŚƌĞƐŚŽůĚƐĨŽƌĂƌƚĞƌŝĂůǁĂůůŝŶŇĂŵŵĂƟŽŶƋƵĂŶƟĮĞĚďLJ ϭϳ 18&Ͳ&'WdͬdŝŵĂŐŝŶŐ͗ŝŵƉůŝĐĂƟŽŶƐĨŽƌǀĂƐĐƵůĂƌ   ŝŶƚĞƌǀĞŶƟŽŶĂůƐƚƵĚŝĞƐ ŚĂƉƚĞƌϯ /ŶĐƌĞĂƐĞĚŚĞŵĂƚŽƉŽŝĞƟĐĂĐƟǀŝƚLJŝŶƉĂƟĞŶƚƐǁŝƚŚ  ϰϯ atherosclerosis ŚĂƉƚĞƌϰ WƌŽůŽŶŐĞĚŚĞŵĂƚŽƉŽŝĞƟĐĂŶĚŵLJĞůŽŝĚĐĞůůƵůĂƌƌĞƐƉŽŶƐĞ  ϲϱ   ŝŶƉĂƟĞŶƚƐĂŌĞƌĂŶĂĐƵƚĞĐŽƌŽŶĂƌLJƐLJŶĚƌŽŵĞŵĞĂƐƵƌĞĚ with 18&ͲWͲϳϭϰWdͬd ŚĂƉƚĞƌϱ ZϮĞdžƉƌĞƐƐŝŽŶŽŶĐŝƌĐƵůĂƟŶŐŵŽŶŽĐLJƚĞƐŝƐĂƐƐŽĐŝĂƚĞĚ  ϴϵ   ǁŝƚŚĂƌƚĞƌŝĂůǁĂůůŝŶŇĂŵŵĂƟŽŶĂƐƐĞƐƐĞĚďLJ18&Ͳ&'   WdͬdŝŶƉĂƟĞŶƚƐĂƚƌŝƐŬĨŽƌĐĂƌĚŝŽǀĂƐĐƵůĂƌĚŝƐĞĂƐĞ WĂƌƚ//  DĞĚŝĂƚŽƌƐŽĨƚŚĞŝŶŇĂŵŵĂƚŽƌLJƌĞƐƉŽŶƐĞŝŶĐĂƌĚŝŽǀĂƐĐƵůĂƌĚŝƐĞĂƐĞ ŚĂƉƚĞƌϲ ZĞŵŶĂŶƚĐŚŽůĞƐƚĞƌŽůĞůŝĐŝƚƐĂƌƚĞƌŝĂůǁĂůůŝŶŇĂŵŵĂƟŽŶ ϭϭϭ   ĂŶĚĂŵƵůƟůĞǀĞůĐĞůůƵůĂƌŝŵŵƵŶĞƌĞƐƉŽŶƐĞŝŶŚƵŵĂŶƐ ŚĂƉƚĞƌϳ ůĞǀĂƚĞĚůŝƉŽƉƌŽƚĞŝŶ;ĂͿůĞǀĞůƐĂƌĞĂƐƐŽĐŝĂƚĞĚǁŝƚŚĐŽƌŽŶĂƌLJ ϭϯϱ   ĂƌƚĞƌLJĐĂůĐŝƵŵƐĐŽƌĞƐŝŶĂƐLJŵƉƚŽŵĂƟĐŝŶĚŝǀŝĚƵĂůƐǁŝƚŚĂ   ĨĂŵŝůLJŚŝƐƚŽƌLJŽĨƉƌĞŵĂƚƵƌĞĂƚŚĞƌŽƐĐůĞƌŽƟĐĐĂƌĚŝŽǀĂƐĐƵůĂƌ disease ŚĂƉƚĞƌϴ ƌƚĞƌŝĂůĂŶĚĐĞůůƵůĂƌŝŶŇĂŵŵĂƟŽŶŝŶƉĂƟĞŶƚƐǁŝƚŚ< ϭϱϭ

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ŚĂƉƚĞƌϵ Secukinumab treatment decreases arterial wall 173   ŝŶŇĂŵŵĂƟŽŶŝŶƉĂƟĞŶƚƐǁŝƚŚƉĞƌŝƉŚĞƌĂůƐƉŽŶĚLJůŽĂƌƚŚƌŝƟƐ ŚĂƉƚĞƌϭϬ ^ƵŵŵĂƌLJ͕ĚŝƐĐƵƐƐŝŽŶĂŶĚĐůŝŶŝĐĂůŝŵƉůŝĐĂƟŽŶƐ  ϭϴϱ ĚĚĞŶĚĂ   EĞĚĞƌůĂŶĚƐĞƐĂŵĞŶǀĂƫŶŐ    ϭϵϴ    ƵƚŚŽƌƐĂŶĚĂĸůŝĂƟŽŶƐ     ϮϬϯ    WŽƌƞŽůŝŽĂŶĚůŝƐƚŽĨƉƵďůŝĐĂƟŽŶƐ    ϮϬϳ 

About the author 211

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,WdZϭ

'ĞŶĞƌĂůŝŶƚƌŽĚƵĐƟŽŶĂŶĚ 





outline of the thesis

^ŝŵŽŶĞ>͘sĞƌǁĞŝũ

Adapted from:

sĞƌǁĞŝũ^>͕ǀĂŶĚĞƌsĂůŬ&D͕^ƚƌŽĞƐ^͘

EŽǀĞůĚŝƌĞĐƟŽŶƐŽĨŝŶŇĂŵŵĂƟŽŶĂƐĂƚŚĞƌĂƉĞƵƟĐƚĂƌŐĞƚŝŶ atherosclerosis.

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'EZ>/EdZKhd/KE

ƚŚĞƌŽƐĐůĞƌŽƐŝƐ ŝƐ Ă ĐŚƌŽŶŝĐ ĚŝƐĞĂƐĞ ŽĨ ƚŚĞ ĂƌƚĞƌŝĂů ǁĂůů͕ ƵŶĚĞƌůLJŝŶŐ ƚŚĞ ŵĂũŽƌŝƚLJ ŽĨ ĐĂƌĚŝŽǀĂƐĐƵůĂƌ ĞǀĞŶƚƐ͘ /Ŷ ƚŚĞ ƚǁĞŶƟĞƚŚ ĐĞŶƚƵƌLJ͕ ƚŚĞ ĐĂƵƐĂů ƌŽůĞ ĨŽƌ >> ĐŚŽůĞƐƚĞƌŽů ŝŶ ƚŚĞ ĚĞǀĞůŽƉŵĞŶƚ ŽĨ ĂƚŚĞƌŽƐĐůĞƌŽƐŝƐ ǁĂƐ ĮƌŵůLJ ĞƐƚĂďůŝƐŚĞĚ ƵƐŝŶŐ Ă ŐĞŶĞƟĐ ĂƉƉƌŽĂĐŚ1͕ ĐŽŵƉůĞŵĞŶƚĞĚ ďLJ ƐĞƌŝĞƐ ŽĨ ƌĂŶĚŽŵŝnjĞĚ ĐůŝŶŝĐĂů ƚƌŝĂůƐ͕ ĐŽŶƐŝƐƚĞŶƚůLJ ƐŚŽǁŝŶŐ ƚŚĂƚ >> ĐŚŽůĞƐƚĞƌŽů ůŽǁĞƌŝŶŐ ƚŚĞƌĂƉŝĞƐ ƌĞĚƵĐĞĚ ĐĂƌĚŝŽǀĂƐĐƵůĂƌ ĚŝƐĞĂƐĞ ;sͿ ƌĞůĂƚĞĚ ŵŽƌďŝĚŝƚLJ ĂŶĚ ŵŽƌƚĂůŝƚLJ2͘ KǀĞƌ ƚŚĞ LJĞĂƌƐ͕ ƚŚĞƌĂƉĞƵƟĐ ŽƉƟŽŶƐ ƚŽ ůŽǁĞƌ >> ĐŚŽůĞƐƚĞƌŽů ŚĂǀĞ ĞdžƉĂŶĚĞĚ͕ ǁŝƚŚ W^<ϵ ŝŶŚŝďŝƚŽƌƐ ĂƐ ƚŚĞ ŵŽƐƚ ƌĞĐĞŶƚůLJ ĂƉƉƌŽǀĞĚ ƚƌĞĂƚŵĞŶƚ͕ ůĞĂĚŝŶŐ ƚŽ ĂƉƉƌŽdžŝŵĂƚĞůLJ ϲϬй ůŽǁĞƌŝŶŐ ŽĨ >> ĐŚŽůĞƐƚĞƌŽů ŽŶ ƚŽƉ ŽĨ ƐƚĂƟŶ ƚƌĞĂƚŵĞŶƚ ĂŶĚ Ă ĨƵƌƚŚĞƌ ƌĞĚƵĐƟŽŶ ŽĨ ĐĂƌĚŝŽǀĂƐĐƵůĂƌ ƌŝƐŬ3͘ ĞƐƉŝƚĞ ƚŚĞƐĞ ŝŵƉƌĞƐƐŝǀĞ ĂĐŚŝĞǀĞŵĞŶƚƐ͕ ĂƚŚĞƌŽƐĐůĞƌŽƐŝƐ ĐŽŶƟŶƵĞƐƚŽďĞĂůĞĂĚŝŶŐĐĂƵƐĞŽĨŵŽƌƚĂůŝƚLJ͕ǁŝƚŚϭϳ͘ϭŵŝůůŝŽŶĞƐƟŵĂƚĞĚĚĞĂƚŚƐƉĞƌLJĞĂƌ4. ƚ ƚŚĞ ďĞŐŝŶŶŝŶŐ ŽĨ ƚŚĞ ƚǁĞŶƚLJͲĮƌƐƚ ĐĞŶƚƵƌLJ͕ ƚŚĞ ůŝƉŝĚͲĐĞŶƚĞƌĞĚ ǀŝĞǁ ŽŶ ĂƚŚĞƌŽŐĞŶĞƐŝƐ ƐŚŝŌĞĚ͕ ĂƐ ǁĞ ƐƚĂƌƚĞĚ ƚŽ ĂĐŬŶŽǁůĞĚŐĞ ŝƚƐ ŵƵůƟĨĂĐƚŽƌŝĂů ŶĂƚƵƌĞ ǁŚŝĐŚ ŝƐ ĐŚĂƌĂĐƚĞƌŝnjĞĚ ďLJ Ă ĐŚƌŽŶŝĐ ůŽǁͲŐƌĂĚĞ ŝŶŇĂŵŵĂƟŽŶ ƚŚƌŽƵŐŚŽƵƚ Ăůů ƐƚĂŐĞƐ ŽĨ ƚŚĞ ĂƚŚĞƌŽƐĐůĞƌŽƟĐ ƉƌŽĐĞƐƐϱ͕ϲ. /Ŷ ƌĞĐŽŐŶŝƟŽŶ ŽĨ ƚŚŝƐ ƉĂƌĂĚŝŐŵ ƐŚŝŌ͕ ĐĂƌĚŝŽǀĂƐĐƵůĂƌ ƌŝƐŬ ĂŌĞƌ ŽƉƟŵĂů ůŽǁĞƌŝŶŐ ŽĨ >> ĐŚŽůĞƐƚĞƌŽů ŵĂLJ ďĞ ĚƌŝǀĞŶ ďLJ ƌĞƐŝĚƵĂů ͚ŝŶŇĂŵŵĂƚŽƌLJ͛ ƌŝƐŬ͘ ZĞĐĞŶƚůLJ͕ ƚŚĞ ŝŶŇĂŵŵĂƟŽŶͲ ŚLJƉŽƚŚĞƐŝƐǁĂƐǀĂůŝĚĂƚĞĚďLJďŽƚŚĂDĞŶĚĞůŝĂŶZĂŶĚŽŵŝƐĂƟŽŶƐƚƵĚLJ;ĐLJƚŽŬŝŶĞ/>ͲϲĂƐĐĂƵƐĂů ƌŝƐŬĨĂĐƚŽƌĨŽƌsͿ7ĂƐǁĞůůĂƐĂƌĂŶĚŽŵŝnjĞĚĐŽŶƚƌŽůƚƌŝĂů;ƚŚĞEdK^ƚƌŝĂůͿ͕ǁŚŝĐŚƐŚŽǁĞĚ ĨŽƌ ƚŚĞ ĮƌƐƚ ƟŵĞ Ă ƌĞĚƵĐƟŽŶ ŝŶ ĐĂƌĚŝŽǀĂƐĐƵůĂƌ ĞǀĞŶƚƐ ŝŶ ƉĂƟĞŶƚƐ ǁŝƚŚ ŬŶŽǁŶ s ƵƉŽŶ ƚƌĞĂƚŵĞŶƚǁŝƚŚĂŶƟͲŝŶŇĂŵŵĂƚŽƌLJƚŚĞƌĂƉLJ;ƚĂƌŐĞƟŶŐ/>ͲϭɴͿ8. DƵůƟͲůĞǀĞůĐĞůůƵůĂƌŝŵŵƵŶĞƌĞƐƉŽŶƐĞĂŶĚĂƚŚĞƌŽƐĐůĞƌŽƐŝƐ dŚĞŝŶŇĂŵŵĂƟŽŶͲŚLJƉŽƚŚĞƐŝƐŝŶsŝƐďĂƐĞĚŽŶƚŚĞĮŶĚŝŶŐŽĨŝŵŵƵŶĞĐĞůůƐ͕ƉĂƌƟĐƵůĂƌůLJ ŵLJĞůŽŝĚ ůŝŶĞĂŐĞ ŵĂĐƌŽƉŚĂŐĞƐ͕ ŝŶ ĂƚŚĞƌŽƐĐůĞƌŽƟĐ ƉůĂƋƵĞƐ9͘ /Ŷ ŵŽƌĞ ƉƌŽŐƌĞƐƐŝǀĞ ƉůĂƋƵĞƐ͕ Ă ŚŝŐŚĞƌ ĂŵŽƵŶƚ ŽĨ ŝŵŵƵŶĞ ĐĞůůƐ ŝƐ ĨŽƵŶĚ͕ ŝŶĚƵĐŝŶŐ ƉůĂƋƵĞ ǀƵůŶĞƌĂďŝůŝƚLJ͘ ZĞĐƌƵŝƚŵĞŶƚ ŽĨ ĐŝƌĐƵůĂƟŶŐŵŽŶŽĐLJƚĞƐ;ŵĂĐƌŽƉŚĂŐĞƉƌĞĐƵƌƐŽƌƐͿƚŽƚŚĞĂƚŚĞƌŽƐĐůĞƌŽƟĐƉůĂƋƵĞŝƐĨĂĐŝůŝƚĂƚĞĚ ďLJ ĂĚŚĞƐŝŽŶ ŽĨ ŵŽŶŽĐLJƚĞƐ ƚŽ ĞŶĚŽƚŚĞůŝĂů ĐĞůůƐ͕ ǁŚŝĐŚ ŝƐ ĨŽůůŽǁĞĚ ďLJ ŵŝŐƌĂƟŽŶ ŝŶƚŽ ƚŚĞ arterial wall10͘ /Ŷ ƚŚĞ ĂƌƚĞƌŝĂů ǁĂůů͕ ŵŽŶŽĐLJƚĞƐ ĚŝīĞƌĞŶƟĂƚĞ ŝŶƚŽ ŵĂĐƌŽƉŚĂŐĞƐ͕ ĞŶŐƵůĮŶŐ ůŝƉŝĚƐ͕ ƌĞƐƵůƟŶŐ ŝŶ ĨŽĂŵ ĐĞůůƐ͘ dŚĞƐĞ ŵŽŶŽĐLJƚĞƐͬŵĂĐƌŽƉŚĂŐĞƐ ĞdžƉƌĞƐƐ ƉƌŽͲŝŶŇĂŵŵĂƚŽƌLJ ĐLJƚŽŬŝŶĞƐ͕ŝŶĚƵĐŝŶŐĂŶĚŵĂŝŶƚĂŝŶŝŶŐŝŶŇĂŵŵĂƚŽƌLJĂĐƟǀŝƚLJŝŶĂƚŚĞƌŽƐĐůĞƌŽƟĐůĞƐŝŽŶƐŝŶĂůů stages of atherogenesis11͘ ƵƌŝŶŐ ƐƚĞĂĚLJ ƐƚĂƚĞ ĐŽŶĚŝƟŽŶƐ͕ ŵLJĞůŽŝĚ ĐĞůůƐ ĂƌĞ ƉƌŽĚƵĐĞĚ ďLJ ŚĞŵĂƚŽƉŽŝĞƟĐƐƚĞŵĂŶĚƉƌŽŐĞŶŝƚŽƌĐĞůůƐ;,^WƐͿŝŶƚŚĞďŽŶĞŵĂƌƌŽǁ͘KƚŚĞƌůLJŵƉŚŽŝĚŽƌŐĂŶƐ͕ ƐƵĐŚĂƐƚŚĞƐƉůĞĞŶ͕ĐŽŶƚƌŝďƵƚĞƚŽŵLJĞůŽŝĚĐĞůůƉƌŽĚƵĐƟŽŶĚƵƌŝŶŐŝŶŇĂŵŵĂƚŽƌLJĐŽŶĚŝƟŽŶƐ12. /Ŷ ƌĞĐĞŶƚ LJĞĂƌƐ ŝƚ ŚĂƐ ďĞĞŶ ƌĞĐŽŐŶŝnjĞĚ ƚŚĂƚ ĚLJƐƌĞŐƵůĂƟŽŶ ŽĨ ƚŚĞ ŚĂĞŵĂƚŽƉŽŝĞƟĐ ŽƌŐĂŶƐ ĐĂŶďĞŝŶĚƵĐĞĚďLJŚŝŐŚĐŚŽůĞƐƚĞƌŽůůĞǀĞůƐ13͘&ƵƌƚŚĞƌŵŽƌĞ͕ĐŝƌĐƵůĂƟŶŐŵŽŶŽĐLJƚĞƐĐĂŶƐŚŽǁ ĂŵŽƌĞƉƌŽͲŝŶŇĂŵŵĂƚŽƌLJƉŚĞŶŽƚLJƉĞ͘dŚŝƐĂůůĐŽŶƚƌŝďƵƚĞƐƐŝŐŶŝĮĐĂŶƚůLJƚŽĂƚŚĞƌŽŐĞŶĞƐŝƐ͘/Ŷ ƐƵŵŵĂƌLJ͕ ĂƚŚĞƌŽƐĐůĞƌŽƐŝƐ ŝƐ ŵĞĚŝĂƚĞĚ ďLJ Ă ŵƵůƟͲůĞǀĞů ĐĞůůƵůĂƌ ŝŵŵƵŶĞ ƌĞƐƉŽŶƐĞ͕ ĚƌŝǀĞŶ

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1

ďLJ ŵŝŐƌĂƟŽŶ ŽĨ ƉƌŽͲŝŶŇĂŵŵĂƚŽƌLJ ŵŽŶŽĐLJƚĞƐ͕ ƉƌŽĚƵĐĞĚ ďLJ ŚĞŵĂƚŽƉŽŝĞƟĐ ŽƌŐĂŶƐ͕ ŝŶƚŽ ĂƚŚĞƌŽƐĐůĞƌŽƟĐƉůĂƋƵĞƐ͕ŝŶĚƵĐŝŶŐĂƌƚĞƌŝĂůǁĂůůŝŶŇĂŵŵĂƟŽŶ͘ /ŵĂŐŝŶŐŽĨŝŶŇĂŵŵĂƟŽŶ dŚĞ ŝŶŇĂŵŵĂƚŽƌLJ ƌĞƐƉŽŶƐĞ ĐĂŶ ďĞ ǀŝƐƵĂůŝnjĞĚ ƵƐŝŶŐ 18&ͲŇƵŽƌĚĞŽdžLJŐůƵĐŽƐĞ ;18&Ͳ&'Ϳ ƉŽƐŝƚƌŽŶ ĞŵŝƐƐŝŽŶ ƚŽŵŽŐƌĂƉŚLJͬĐŽŵƉƵƚĞĚ ƚŽŵŽŐƌĂƉŚLJ ;WdͲdͿ14͘ Wdͬd ŝƐ Ă ŶƵĐůĞĂƌ ŝŵĂŐŝŶŐƚĞĐŚŶŝƋƵĞƵƐŝŶŐƌĂĚŝŽĂĐƟǀĞƚƌĂĐĞƌƐ͕ƐƵĐŚĂƐ18&ͲŇƵŽƌĚĞŽdžLJŐůƵĐŽƐĞ;18&Ͳ&'Ϳ͘&' ŝƐ Ă ŐůƵĐŽƐĞ ĂŶĂůŽŐƵĞ͕ ƚŚƵƐ ƌĞŇĞĐƟŶŐ ŵĞƚĂďŽůŝĐ ĂĐƟǀŝƚLJ ŽĨ ĐĞůůƐ ;ŝŶ ƚŚĞ ĂƌƚĞƌŝĂů ǁĂůů ĂŶĚ ŚĞŵĂƚŽƉŽŝĞƟĐ ŽƌŐĂŶƐͿ͘ dŚĞ ƵƐĞ ŽĨ18&Ͳ&' Wdͬd ƚŽ ƋƵĂŶƟĨLJ ĂƌƚĞƌŝĂů ǁĂůů ŝŶŇĂŵŵĂƟŽŶ ŝƐďĂƐĞĚŽŶƐƚƵĚŝĞƐĞdžĂŵŝŶŝŶŐŚŝƐƚŽůŽŐLJϭϱ͕ϭϲĂŶĚŐĞŶĞĞdžƉƌĞƐƐŝŽŶϭϳ͕ϭϴŝŶƉůĂƋƵĞŵĂƚĞƌŝĂůŽĨ ŚƵŵĂŶ ĐĂƌŽƟĚƐ͘ &ƵƌƚŚĞƌŵŽƌĞ͕18&Ͳ&' ƵƉƚĂŬĞ ŝƐ ĂƐƐŽĐŝĂƚĞĚ ǁŝƚŚ ŵĂĐƌŽƉŚĂŐĞ ĐŽŶƚĞŶƚ ŝŶ ƚŚĞƉůĂƋƵĞƐ15͘&ŝŶĂůůLJ͕ƌĞůĞǀĂŶĐĞŽĨƚŚĞƐĞĮŶĚŝŶŐƐǁĂƐƉƌŽǀĞŶŝŶĂůĂƌŐĞƐƚƵĚLJƐŚŽǁŝŶŐƚŚĂƚ increased 18&Ͳ&'ƵƉƚĂŬĞŝŶƚŚĞĂƌƚĞƌŝĂůǁĂůůƉƌĞĚŝĐƚƐĐĂƌĚŝŽǀĂƐĐƵůĂƌĞǀĞŶƚƐ19. dĂƌŐĞƟŶŐŽĨŝŶŇĂŵŵĂƚŽƌLJƉĂƚŚǁĂLJƐ ƐƚŚĞEdK^ƚƌŝĂůƐŚŽǁĞĚƚŚĂƚƚƌĞĂƚŵĞŶƚǁŝƚŚĂŶƟͲŝŶŇĂŵŵĂƚŽƌLJƚŚĞƌĂƉLJŝŶsƉĂƟĞŶƚƐ ƌĞƐƵůƚƐŝŶĂƌĞĚƵĐƟŽŶŽĨĐĂƌĚŝŽǀĂƐĐƵůĂƌĞǀĞŶƚƐ8͕ƚŚĞŝŶŇĂŵŵĂƚŽƌLJƉĂƚŚǁĂLJŝƐŝŶĐƌĞĂƐŝŶŐůLJ ďĞŝŶŐ ĐŽŶƐŝĚĞƌĞĚ ĂƐ ĂŶ ĂƩƌĂĐƟǀĞ ƚĂƌŐĞƚ ĨŽƌ ĂŶƟͲŝŶŇĂŵŵĂƚŽƌLJ ƚŚĞƌĂƉŝĞƐ ƚŽ ĨƵƌƚŚĞƌ ƌĞĚƵĐĞ ƚŚĞ ƌĞƐŝĚƵĂů ŝŶŇĂŵŵĂƚŽƌLJ ƌŝƐŬ͘18&Ͳ&' Wdͬd ĐŽƵůĚ ďĞ ƵƐĞĚ ƚŽ ĞǀĂůƵĂƚĞ ŶĞǁ ƚŚĞƌĂƉŝĞƐƚĂƌŐĞƟŶŐĂƚŚĞƌŽƐĐůĞƌŽƐŝƐĂŶĚƚŚĞƌĞďLJŝĚĞŶƟĨLJŝŶŐƚŚĞŵŽƐƚƉƌŽŵŝƐŝŶŐƚƌĞĂƚŵĞŶƚ ŽƉƉŽƌƚƵŶŝƟĞƐ͘,ŽǁĞǀĞƌ͕ĚƵĞƚŽƚŚĞĐŽŵƉůĞdžƌŽůĞŽĨŝŵŵƵŶĞĐĞůůƐŝŶĂƚŚĞƌŽŐĞŶĞƐŝƐ͕ďĞƩĞƌ ƵŶĚĞƌƐƚĂŶĚŝŶŐŽĨƚŚĞŵƵůƟͲůĞǀĞůŝŶŇĂŵŵĂƚŽƌLJƌĞƐƉŽŶƐĞĂŶĚƚŚĞŵĞĚŝĂƚŽƌƐŽĨƚŚŝƐƌĞƐƉŽŶƐĞ ŝŶĂƚŚĞƌŽƐĐůĞƌŽƐŝƐŝƐŶĞĞĚĞĚƚŽĚĞǀĞůŽƉƐƉĞĐŝĮĐĂŶƟͲŝŶŇĂŵŵĂƚŽƌLJƚŚĞƌĂƉŝĞƐŝŶƚŚĞĨƵƚƵƌĞ͘

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OUTLINE OF THIS THESIS

/Ŷ ƚŚŝƐ ƚŚĞƐŝƐ ǁĞ Ăŝŵ ƚŽ ǀŝƐƵĂůŝnjĞ ƚŚĞ ŵƵůƟͲůĞǀĞů ŝŶŇĂŵŵĂƚŽƌLJ ƌĞƐƉŽŶƐĞ ŝŶ s ĂŶĚ ƚŽ ŝĚĞŶƟĨLJŵĞĚŝĂƚŽƌƐŽĨƚŚŝƐƌĞƐƉŽŶƐĞ͘Part IŽĨƚŚŝƐƚŚĞƐŝƐĐŽŶĐĞƌŶƐŝŵĂŐŝŶŐŽĨŝŶŇĂŵŵĂƟŽŶ͘ /ŶƚŚĞĮƌƐƚĐŚĂƉƚĞƌǁĞůŽŽŬĂƚ18&Ͳ&'WdͬdĂƐĂŶŝŵĂŐŝŶŐƚĞĐŚŶŝƋƵĞƚŽƋƵĂŶƟĨLJĂƌƚĞƌŝĂů ǁĂůůŝŶŇĂŵŵĂƟŽŶŝŶǀĂƌŝŽƵƐƉĂƟĞŶƚŐƌŽƵƉƐ;ĐŚĂƉƚĞƌϮͿ͘/ŶĐŚĂƉƚĞƌϯ͕ǁĞŝŶǀĞƐƟŐĂƚĞ the ĐŚƌŽŶŝĐŵƵůƟͲůĞǀĞůŝŶŇĂŵŵĂƚŽƌLJƌĞƐƉŽŶƐĞŝŶƉĂƟĞŶƚƐǁŝƚŚŬŶŽǁŶs͕ƵƐŝŶŐ18&Ͳ&'Wdͬ d͘/ŶĐŚĂƉƚĞƌϰǁĞĞdžƉůŽƌĞƚŚĞĞīĞĐƚŽĨĂŶĂĐƵƚĞĐŽƌŽŶĂƌLJƐLJŶĚƌŽŵĞŽŶƚŚĞŵƵůƟͲůĞǀĞů ŝŶŇĂŵŵĂƚŽƌLJƌĞƐƉŽŶƐĞ͕ƵƐŝŶŐĂWdƚƌĂĐĞƌŵŽƌĞƐƉĞĐŝĮĐĨŽƌŵLJĞůŽŝĚĐĞůůƐ͗18&ͲWͲϳϭϰ͘/Ŷ ĐŚĂƉƚĞƌϱwe ĞƐƚĂďůŝƐŚƚŚĞƌĞůĂƟŽŶďĞƚǁĞĞŶŵŽŶŽĐLJƚĞƉŚĞŶŽƚLJƉĞĂŶĚŝŶŇĂŵŵĂƚŽƌLJĂĐƟǀŝƚLJ ŝŶƚŚĞĂƌƚĞƌŝĂůǁĂůůŝŶƉĂƟĞŶƚƐĂƚŝŶĐƌĞĂƐĞĚsƌŝƐŬ͘ Part II ĨŽĐƵƐƐĞƐ ŽŶ ŵĞĚŝĂƚŽƌƐ ŽĨ ƚŚĞ ŝŶŇĂŵŵĂƚŽƌLJ ƌĞƐƉŽŶƐĞ͕ ďŽƚŚ ůŝƉŝĚ ĚƌŝǀĞŶ ĂƐ ǁĞůů ĂƐ ŶŽŶͲůŝƉŝĚ ĚƌŝǀĞŶ͘ >> ĐŚŽůĞƐƚĞƌŽů ŝƐ ŶŽƚ ƚŚĞ ŽŶůLJ ĂƚŚĞƌŽŐĞŶŝĐ ůŝƉŽƉƌŽƚĞŝŶ͖ ĂůƐŽ ŽƚŚĞƌ ůŝƉŽƉƌŽƚĞŝŶƐ ĂƌĞ ĂƐƐŽĐŝĂƚĞĚ ǁŝƚŚ ŝŶĐƌĞĂƐĞĚ sͲƌŝƐŬ͘ ŚĂƉƚĞƌ ϲ looks at the role of ƌĞŵŶĂŶƚ ĐŚŽůĞƐƚĞƌŽů͕ Ă ƚƌŝŐůLJĐĞƌŝĚĞͲƌŝĐŚ ůŝƉŽƉƌŽƚĞŝŶ͕ ŽŶ ƚŚĞ ŝŶŇĂŵŵĂƚŽƌLJ ƌĞƐƉŽŶƐĞ͘ In ĐŚĂƉƚĞƌ ϳ͕ ǁĞ ŝŶǀĞƐƟŐĂƚĞ ƚŚĞ ĐŽŶƚƌŝďƵƟŽŶ ŽĨ ůŝƉŽƉƌŽƚĞŝŶ ;ĂͿ ƚŽ ĂƚŚĞƌŽƐĐůĞƌŽƟĐ ďƵƌĚĞŶ ŝŶ ĂƐLJŵƉƚŽŵĂƟĐ ŝŶĚŝǀŝĚƵĂůƐ ǁŝƚŚ Ă ĨĂŵŝůLJ ŚŝƐƚŽƌLJ ŽĨ ƉƌĞŵĂƚƵƌĞ s͘ WĂƟĞŶƚƐǁŝƚŚŶŽŶͲůŝƉŝĚĚƌŝǀĞŶƌŝƐŬĨĂĐƚŽƌƐĨŽƌsĂƌĞƐƚƵĚŝĞĚŝŶĐŚĂƉƚĞƌϴĂŶĚϵ͘/ŶĐŚĂƉƚĞƌϴ͕ ǁĞĞdžƉůŽƌĞŝŶƉĂƟĞŶƚƐǁŝƚŚĐŚƌŽŶŝĐŬŝĚŶĞLJĚŝƐĞĂƐĞ͕ǁŚŽĂƌĞĂƚŝŶĐƌĞĂƐĞĚsƌŝƐŬ͕ǁŚĞƚŚĞƌ ĂŶĚƚŽǁŚĂƚĞdžƚĞŶƚĂŶŝŶĐƌĞĂƐĞĚŝŶŇĂŵŵĂƚŽƌLJƐƚĂƚĞĐŽƵůĚďĞĚĞƚĞĐƚĞĚ͘/ŶƚŚĞůĂƐƚĐŚĂƉƚĞƌ͕ ĐŚĂƉƚĞƌϵ͕ǁĞĂƐƐĞƐƐƚŚĞĞīĞĐƚŽĨƐĞĐƵŬŝŶƵŵĂďƚƌĞĂƚŵĞŶƚ;/>ͲϭϳŝŶŚŝďŝƟŽŶͿŽŶĂƌƚĞƌŝĂůǁĂůů ŝŶŇĂŵŵĂƟŽŶŝŶƉĂƟĞŶƚƐǁŝƚŚƐƉŽŶĚLJůŽĂƌƚŚƌŝƟƐ͕ǁŚŽĂƌĞŚĂůůŵĂƌŬĞĚďLJŝŶĐƌĞĂƐĞĚsƌŝƐŬ͘

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ϭϴ͘ 'ƌĂĞďĞD͕WĞĚĞƌƐĞŶ^&͕ŽƌŐǁĂƌĚƚ>ĞƚĂů͘ DŽůĞĐƵůĂƌƉĂƚŚŽůŽŐLJŝŶǀƵůŶĞƌĂďůĞĐĂƌŽƟĚ ƉůĂƋƵĞƐ͗ĐŽƌƌĞůĂƟŽŶǁŝƚŚ΀ϭϴ΁ͲŇƵŽƌŽĚĞ- ŽdžLJŐůƵĐŽƐĞƉŽƐŝƚƌŽŶĞŵŝƐƐŝŽŶƚŽŵŽŐƌĂ-ƉŚLJ;&'ͲWdͿ͘Eur J Vasc Endovasc Surg. ϮϬϬϵ͖ϯϳ;ϲͿ͗ϳϭϰͲϳϮϭ͘

ϭϵ͘ &ŝŐƵĞƌŽĂ>͕ďĚĞůďĂŬLJ͕dƌƵŽŶŐYĞƚĂů͘ DĞĂƐƵƌĞŵĞŶƚŽĨĂƌƚĞƌŝĂůĂĐƟǀŝƚLJŽŶƌŽƵƟŶĞ &'WdͬdŝŵĂŐĞƐŝŵƉƌŽǀĞƐƉƌĞĚŝĐƟŽŶŽĨ risk of future CV events. JACC Cardiovasc

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WZdϭ

/ŵĂŐŝŶŐŽĨŵƵůƟͲůĞǀĞůŝŶŇĂŵŵĂƟŽŶŝŶ

cardiovascular disease

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,WdZϮ

dŚƌĞƐŚŽůĚƐĨŽƌƌƚĞƌŝĂůtĂůů

/ŶŇĂŵŵĂƟŽŶYƵĂŶƟĮĞĚďLJ

18

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WdŝŵĂŐŝŶŐ͗ŝŵƉůŝĐĂƟŽŶƐĨŽƌsĂƐĐƵůĂƌ

/ŶƚĞƌǀĞŶƟŽŶĂů^ƚƵĚŝĞƐ

&ůĞƵƌD͘ǀĂŶĚĞƌsĂůŬ͕^ŝŵŽŶĞ>͘sĞƌǁĞŝũ͕ <ŽŽƐ͘,͘ǁŝŶĚĞƌŵĂŶ͕Ăƌƚ͘^ƚƌĂŶŐ͕zĂŶŶŝĐŬ<ĂŝƐĞƌ͕ ,ĞŶŬ͘DĂƌƋƵĞƌŝŶŐ͕Ăƌƚ:͘EĞĚĞƌǀĞĞŶ͕ƌŝŬ^͘'͘^ƚƌŽĞƐ͕ ,ĞŝŶ:͘sĞƌďĞƌŶĞ͕:ĂŵĞƐ,͘&͘ZƵĚĚ

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ABSTRACT

KďũĞĐƟǀĞƐ͗dŚŝƐƐƚƵĚLJĂƐƐĞƐƐĞĚϱĨƌĞƋƵĞŶƚůLJĂƉƉůŝĞĚĂƌƚĞƌŝĂů18ŇƵŽƌŽĚĞŽdžLJŐůƵĐŽƐĞ;18&Ͳ&'Ϳ ƵƉƚĂŬĞ ŵĞƚƌŝĐƐ ŝŶ ŚĞĂůƚŚLJ ĐŽŶƚƌŽů ƐƵďũĞĐƚƐ͕ ƚŚŽƐĞ ǁŝƚŚ ƌŝƐŬ ĨĂĐƚŽƌƐ ĂŶĚ ƉĂƟĞŶƚƐ ǁŝƚŚ ĐĂƌĚŝŽǀĂƐĐƵůĂƌĚŝƐĞĂƐĞ;sͿ͕ƚŽĚĞƌŝǀĞƵƉƚĂŬĞƚŚƌĞƐŚŽůĚƐŝŶĞĂĐŚƐƵďũĞĐƚŐƌŽƵƉ͘ĚĚŝƟŽŶĂůůLJ͕ ǁĞƚĞƐƚĞĚƚŚĞƌĞƉƌŽĚƵĐŝďŝůŝƚLJŽĨƚŚĞƐĞŵĞĂƐƵƌĞƐĂŶĚƉƌŽĚƵĐĞĚƌĞĐŽŵŵĞŶĚĞĚƐĂŵƉůĞƐŝnjĞ ĨŽƌŝŶƚĞƌǀĞŶƟŽŶĂůĚƌƵŐƐƚƵĚŝĞƐ͘ ĂĐŬŐƌŽƵŶĚ͗ 18&Ͳ&'ƉŽƐŝƚƌŽŶĞŵŝƐƐŝŽŶƚŽŵŽŐƌĂƉŚLJ;WdͿĐĂŶŝĚĞŶƟĨLJƉůĂƋƵĞŝŶŇĂŵŵĂƟŽŶ ĂƐ Ă  ƐƵƌƌŽŐĂƚĞ ĞŶĚƉŽŝŶƚ ŝŶ ǀĂƐĐƵůĂƌ ŝŶƚĞƌǀĞŶƟŽŶĂů ĚƌƵŐ ƚƌŝĂůƐ͘ ,ŽǁĞǀĞƌ͕ ĂŶ ŽǀĞƌǀŝĞǁ ŽĨ 18&Ͳ&' ƵƉƚĂŬĞ ŵĞƚƌŝĐƐ͕ ƚŚƌĞƐŚŽůĚ ǀĂůƵĞƐ͕ ĂŶĚ ƌĞƉƌŽĚƵĐŝďŝůŝƚLJ ŝŶ ŚĞĂůƚŚLJ ĐŽŵƉĂƌĞĚ ǁŝƚŚ

diseased subjects is not available.

DĞƚŚŽĚƐ͗ 18&Ͳ&'WdͬdŽĨƚŚĞĐĂƌŽƟĚĂƌƚĞƌŝĞƐĂŶĚĂƐĐĞŶĚŝŶŐĂŽƌƚĂǁĂƐƉĞƌĨŽƌŵĞĚŝŶϴϯ ƐƵďũĞĐƚƐ;ϲϭцϴLJĞĂƌƐͿĐŽŵƉƌŝƐŝŶŐϯŐƌŽƵƉƐ͗ϮϱŚĞĂůƚŚLJĐŽŶƚƌŽůƐ͕ϮϯƉĂƟĞŶƚƐĂƚŝŶĐƌĞĂƐĞĚs ƌŝƐŬ͕ĂŶĚϯϱƉĂƟĞŶƚƐǁŝƚŚŬŶŽǁŶs͘tĞƋƵĂŶƟĮĞĚ18&Ͳ&'ƵƉƚĂŬĞĂĐƌŽƐƐƚŚĞǁŚŽůĞĂƌƚĞƌLJ͕ ƚŚĞŵŽƐƚĚŝƐĞĂƐĞĚƐĞŐŵĞŶƚ͕ĂŶĚǁŝƚŚŝŶĂůůĂĐƟǀĞƐĞŐŵĞŶƚƐŽǀĞƌƐĞǀĞƌĂůƉƌĞͲĚĞĮŶĞĚĐƵƚŽīƐ͘ tĞ ƌĞƉŽƌƚ ƚŚĞƐĞ ĚĂƚĂ ǁŝƚŚ ĂŶĚ ǁŝƚŚŽƵƚ ďĂĐŬŐƌŽƵŶĚ ĐŽƌƌĞĐƟŽŶƐ͘ &ŝŶĂůůLJ͕ ǁĞ ĚĞƚĞƌŵŝŶĞĚ ŵĞĂƐƵƌĞŵĞŶƚƌĞƉƌŽĚƵĐŝďŝůŝƚLJĂŶĚƌĞĐŽŵŵĞŶĚĞĚƐĂŵƉůĞƐŝnjĞƐĨŽƌĨƵƚƵƌĞĚƌƵŐƐƚƵĚŝĞƐďĂƐĞĚ on these results. ZĞƐƵůƚƐ͗ All 18&Ͳ&' ŵĞƚƌŝĐƐ ǁĞƌĞ ƐŝŐŶŝĮĐĂŶƚůLJ ĚŝīĞƌĞŶƚ ďĞƚǁĞĞŶ ŚĞĂůƚŚLJ ĂŶĚ ĚŝƐĞĂƐĞĚ ƐƵďũĞĐƚƐĨŽƌďŽƚŚƚŚĞĐĂƌŽƟĚƐĂŶĚĂŽƌƚĂ͘dŚƌĞƐŚŽůĚƐŽĨƉŚLJƐŝŽůŽŐŝĐĂů18&Ͳ&'ƵƉƚĂŬĞǁĞƌĞ ĚĞƌŝǀĞĚĨƌŽŵŚĞĂůƚŚLJĐŽŶƚƌŽůƐƵƐŝŶŐƚŚĞϵϬthƉĞƌĐĞŶƟůĞŽĨƚŚĞŝƌƚĂƌŐĞƚƚŽďĂĐŬŐƌŽƵŶĚƌĂƟŽ ;dZͿǀĂůƵĞ;dZŵĂdžͿ͖ǁŚŽůĞĂƌƚĞƌLJdZŵĂdžŝƐϭ͘ϴϰĨŽƌƚŚĞĐĂƌŽƟĚƐĂŶĚϮ͘ϲϴŝŶƚŚĞĂŽƌƚĂ͘dŚĞƐĞ ǁĞƌĞĞdžĐĞĞĚĞĚďLJхϱϮйŽĨƌŝƐŬĨĂĐƚŽƌƉĂƟĞŶƚƐĂŶĚхϲϳйŽĨsƉĂƟĞŶƚƐ͘ZĞƉƌŽĚƵĐŝďŝůŝƚLJ ǁĂƐ ĞdžĐĞůůĞŶƚ ŝŶ Ăůů ƐƚƵĚLJ ŐƌŽƵƉƐ ;ŝŶƚƌĂĐůĂƐƐ ĐŽƌƌĞůĂƟŽŶ ĐŽĞĸĐŝĞŶƚ хϬ͘ϵϱͿ͘ hƐŝŶŐ ĐĂƌŽƟĚ dZŵĂdžĂƐĂƉƌŝŵĂƌLJĞŶĚƉŽŝŶƚƌĞƐƵůƚĞĚŝŶĂƐĂŵƉůĞƐŝnjĞĞƐƟŵĂƚĞƐĂƉƉƌŽdžŝŵĂƚĞůLJϮϬйůŽǁĞƌ than aorta. ŽŶĐůƵƐŝŽŶƐ͗ tĞ ƌĞƉŽƌƚ ƚŚƌĞƐŚŽůĚƐ ĨŽƌ ƉŚLJƐŝŽůŽŐŝĐĂů18&Ͳ&' ƵƉƚĂŬĞ ŝŶ ƚŚĞ ĂƌƚĞƌŝĂů ǁĂůů ŝŶ ŚĞĂůƚŚLJ ƐƵďũĞĐƚƐ͕ ǁŚŝĐŚ ĞdžĐĞĞĚĞĚ ďLJ ƚŚĞ ŵĂũŽƌŝƚLJ ŽĨ s ƉĂƟĞŶƚƐ͘ dŚŝƐ ƌĞŵĂŝŶƐ ƚƌƵĞ͕ ŝŶĚĞƉĞŶĚĞŶƚ ŽĨ ƌĞĂĚŽƵƚ ǀĞƐƐĞů͕ ƐŝŐŶĂů ƋƵĂŶƟĮĐĂƟŽŶ ŵĞƚŚŽĚ Žƌ ƚŚĞ ƵƐĞ ŽĨ ďĂĐŬŐƌŽƵŶĚ ĐŽƌƌĞĐƟŽŶ͘tĞĂůƐŽĐŽŶĮƌŵƚŚĞŚŝŐŚƌĞƉƌŽĚƵĐŝďŝůŝƚLJŽĨ18&Ͳ&'WdŵĞĂƐƵƌĞƐŽĨŝŶŇĂŵŵĂƟŽŶ͘ EĞǀĞƌƚŚĞůĞƐƐ͕ ďĞĐĂƵƐĞ ŽĨ ŽǀĞƌůĂƉ ďĞƚǁĞĞŶ ƐƵďũĞĐƚ ĐĂƚĞŐŽƌŝĞƐ ĂŶĚ ƚŚĞ ƌĞůĂƟǀĞůLJ ƐŵĂůů ƉŽƉƵůĂƟŽŶ ƐƚƵĚŝĞĚ͕ ƚŚĞƐĞ ĚĂƚĂ ŚĂǀĞ ůŝŵŝƚĞĚ ŐĞŶĞƌĂůŝnjĂďŝůŝƚLJ ƵŶƟů ƐƵďƐƚĂŶƟĂƚĞĚ ŝŶ ůĂƌŐĞƌ͕ ƉƌŽƐƉĞĐƟǀĞĞǀĞŶƚͲĚƌŝǀĞŶƐƚƵĚŝĞƐ͘

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2

/EdZKhd/KE

ƚŚĞƌŽƐĐůĞƌŽƐŝƐ ŝƐ Ă ĐŚƌŽŶŝĐ͕ ůŽǁͲŐƌĂĚĞ ŝŶŇĂŵŵĂƚŽƌLJ ĚŝƐĞĂƐĞ ŽĨ ƚŚĞ ĂƌƚĞƌŝĂů ǁĂůů ƚŚĂƚ ĐĂŶ ĐĂƵƐĞ ŵLJŽĐĂƌĚŝĂů ŝŶĨĂƌĐƟŽŶ ĂŶĚ ƐƚƌŽŬĞ1͘ ĞƐƉŝƚĞ ĂŐŐƌĞƐƐŝǀĞ ƉƌŝŵĂƌLJ ĂŶĚ ƐĞĐŽŶĚĂƌLJ ƉƌĞǀĞŶƟŽŶ ƐƚƌĂƚĞŐŝĞƐ͕ ůŽŶŐͲƚĞƌŵ ĚŝƐĂďŝůŝƚLJ ĂŶĚ ĚĞĂƚŚ ĨƌŽŵ ĐĂƌĚŝŽǀĂƐĐƵůĂƌ ĚŝƐĞĂƐĞ ;sͿ ĐŽŶƟŶƵĞƚŽŝŶĐƌĞĂƐĞ͘ƌƚĞƌŝĂůŝŶŇĂŵŵĂƟŽŶŝƐƐƚƌŽŶŐůLJƌĞůĂƚĞĚƚŽƚŚĞƌŝƐŬŽĨĂƚŚĞƌŽƐĐůĞƌŽƟĐ ƉůĂƋƵĞƌƵƉƚƵƌĞ͘YƵĂŶƟĮĐĂƟŽŶŽĨŝŶŇĂŵŵĂƟŽŶŵĂLJŝŵƉƌŽǀĞƉĂƟĞŶƚƌŝƐŬͲƐƚƌĂƟĮĐĂƟŽŶĂŶĚ allow new drug therapies to be tested1.

EŽŶͲŝŶǀĂƐŝǀĞ ŝŵĂŐŝŶŐ͕ ŝŶ ƉĂƌƟĐƵůĂƌ ǁŝƚŚ 18&ͲŇƵŽƌĚĞŽdžLJŐůƵĐŽƐĞ ƉŽƐŝƚƌŽŶ ĞŵŝƐƐŝŽŶ

ƚŽŵŽŐƌĂƉŚLJ;18&Ͳ&'WdͿ͕ŚĂƐďĞĞŶƵƐĞĚŝŶƚŚŝƐǁĂLJϮ͕ϯ. Arterial wall 18&Ͳ&'ƵƉƚĂŬĞŵŝƌƌŽƌƐ

ŝŶŇĂŵŵĂƚŽƌLJ ĂĐƟǀŝƚLJ ŝŶ ĂƚŚĞƌŽƐĐůĞƌŽƐŝƐ4-6͖ ŝŶŇĂŵŵĂƚŽƌLJ ĐĞůůƐ ĐŽŶƐƵŵĞ ůĂƌŐĞ ĂŵŽƵŶƚƐ ŽĨ

ŐůƵĐŽƐĞ ŝŶ ĐŽŵƉĂƌŝƐŽŶ ǁŝƚŚ ŽƚŚĞƌ ƉůĂƋƵĞ ĐĞůůƐ͘ dŚŝƐ ƌĞƐƵůƚƐ ŝŶ18&Ͳ&' ĂĐĐƵŵƵůĂƟŽŶ͘ /Ŷ

ĂĚĚŝƟŽŶ͕ ĂƌƚĞƌŝĂů18&Ͳ&' ƵƉƚĂŬĞ ŝƐ ŚŝŐŚĞƌ ŝŶ ŵŽƌƉŚŽůŽŐŝĐĂůůLJ ƵŶƐƚĂďůĞ ƉůĂƋƵĞƐ͕ ĂŶĚ ĂůƐŽ

predicts future vascular events7-12.

18&Ͳ&' Wd ĐĂŶ ĂƐƐĞƐƐ ƚŚĞ ĞĸĐĂĐLJ ;Žƌ ĨƵƟůŝƚLJͿ ŽĨ ƚƌĞĂƚŵĞŶƚƐ ĚĞƐŝŐŶĞĚ ƚŽ ůŽǁĞƌ ƉůĂƋƵĞ

ŝŶŇĂŵŵĂƟŽŶ13-26͘ƐƐŚŽǁŶŝŶ^ƵƉƉůĞŵĞŶƚĂƌLJdĂďůĞϭ͕ƚŚĞŶƵŵďĞƌŽĨǀĂƐĐƵůĂƌŝŶƚĞƌǀĞŶƟŽŶ

trials using 18&Ͳ&'WdĂƐĂƐƵƌƌŽŐĂƚĞŵĂƌŬĞƌŽĨŝŶŇĂŵŵĂƟŽŶŝƐŐƌŽǁŝŶŐ͕ǁŝƚŚŚĂůĨďĞŝŶŐ

ƉƵďůŝƐŚĞĚŝŶƚŚĞƉĂƐƚϮLJĞĂƌƐ͘^ĞǀĞƌĂůŽĨƚŚĞƐĞƐƚƵĚŝĞƐĞŶƌŝĐŚĞĚƚŚĞŝƌƐƚƵĚLJƉŽƉƵůĂƟŽŶƐďLJ ĞdžĐůƵĚŝŶŐ ƐƵďũĞĐƚƐ ǁŝƚŚ18&Ͳ&' ƵƉƚĂŬĞ ďĞůŽǁ ĐĞƌƚĂŝŶ ƉƌĞͲĚĞĮŶĞĚ ƚŚƌĞƐŚŽůĚƐ͘ ,ŽǁĞǀĞƌ͕

a consensus regarding the most appropriate thresholds is lacking27-30͕ ƉƌŝŵĂƌŝůLJ ďĞĐĂƵƐĞ

ŚĞĂůƚŚLJ ƐƵďũĞĐƚƐ͕ ƉƌĞƐƵŵĂďůLJ ǁŝƚŚŽƵƚ ƉĂƚŚŽůŽŐŝĐĂů ĂƌƚĞƌŝĂů ŝŶŇĂŵŵĂƟŽŶ ŚĂǀĞ ŶŽƚ ďĞĞŶ ƐLJƐƚĞŵĂƟĐĂůůLJ ŝŵĂŐĞĚ͕ ĂŶĚ ůĂƌŐĞͲƐĐĂůĞĚ ƉƌŽƐƉĞĐƟǀĞ ŽƵƚĐŽŵĞ ƐƚƵĚŝĞƐ ĂƌĞ ĂǁĂŝƚĞĚϯϭ͕ϯϮ. tŝƚŚŽƵƚƚŚĞƐĞĚĂƚĂ͕ŝƚŝƐĐŚĂůůĞŶŐŝŶŐƚŽĞŶƌŽůůƉĂƟĞŶƚƐǁŝƚŚƐƵĸĐŝĞŶƚĂƌƚĞƌŝĂůŝŶŇĂŵŵĂƟŽŶ ƚŽŶĞĞĚƚŚĞƌĂƉLJ͕ĂŶĚƚŽĂǀŽŝĚƌĂŶĚŽŵŝƐŝŶŐƚŚŽƐĞƵŶůŝŬĞůLJƚŽƌĞƐƉŽŶĚ͘ /ŶƚŚŝƐƐƚƵĚLJǁĞĂƐƐĞƐƐĞĚĮǀĞĨƌĞƋƵĞŶƚůLJĂƉƉůŝĞĚĂƌƚĞƌŝĂů18&Ͳ&'ƵƉƚĂŬĞŵĞƚƌŝĐƐŝŶƚŚƌĞĞ ĚŝƐƟŶĐƚŐƌŽƵƉƐ͗ŚĞĂůƚŚLJĐŽŶƚƌŽůƐƵďũĞĐƚƐ͕ƚŚŽƐĞǁŝƚŚƌŝƐŬĨĂĐƚŽƌƐĨŽƌs͕ĂŶĚĂŐƌŽƵƉǁŝƚŚ ĞƐƚĂďůŝƐŚĞĚs͘ŽŶƐŝĚĞƌŝŶŐ18&Ͳ&'ƵƉƚĂŬĞŝŶƚŚĞĂƌƚĞƌŝĂůǁĂůůŽĨŚĞĂůƚŚLJĐŽŶƚƌŽůƐƵďũĞĐƚƐ ĂƐƉŚLJƐŝŽůŽŐŝĐĂů͕ǁĞĚĞƚĞƌŵŝŶĞĚƚŚĞϵϬthƉĞƌĐĞŶƟůĞĨŽƌĂƌƚĞƌŝĂůǁĂůůŝŶŇĂŵŵĂƚŽƌLJĂĐƟǀŝƚLJ ƵƐŝŶŐƐĞǀĞƌĂůĐŽŵŵŽŶůLJƌĞƉŽƌƚĞĚWdĞŶĚƉŽŝŶƚƐ͘&ŝŶĂůůLJ͕ǁĞĚĞƚĞƌŵŝŶĞĚƚŚĞƌĞƉƌŽĚƵĐŝďŝůŝƚLJ of published measures of 18&Ͳ&'ƵƉƚĂŬĞĂŶĚĚĞƌŝǀĞĚŽƉƟŵĂůƐĂŵƉůĞƐŝnjĞƐĨŽƌĚƌƵŐƐƚƵĚŝĞƐ

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DdZ/>^EDd,K^

^ƚƵĚLJƉŽƉƵůĂƟŽŶ tĞƌĞĐƌƵŝƚĞĚƐƵďũĞĐƚƐŝŶƚŽƚŚƌĞĞŐƌŽƵƉƐ͖;ŝͿŚĞĂůƚŚLJĐŽŶƚƌŽůƐƵďũĞĐƚƐ͕;ŝŝͿƉĂƟĞŶƚƐĂƚŝŶĐƌĞĂƐĞĚ s ƌŝƐŬ ;&ƌĂŵŝŶŐŚĂŵ ƌŝƐŬ ƐĐŽƌĞ хϭϬйͿ ĂŶĚ ;ŝŝŝͿ ƉĂƟĞŶƚƐ ǁŝƚŚ ŬŶŽǁŶ s ;ĞdžƉĞƌŝĞŶĐĞĚ ŵLJŽĐĂƌĚŝĂůŝŶĨĂƌĐƟŽŶ͕ƚƌĂŶƐŝĞŶƚŝƐĐŚĞŵŝĐĂƩĂĐŬ͕ƐƚƌŽŬĞŽƌĐĂƌŽƟĚĂƌƚĞƌLJĂƚŚĞƌŽƐĐůĞƌŽƐŝƐх ϭϮŵŽŶƚŚƐďĞĨŽƌĞWdŝŵĂŐŝŶŐͿ͘,ĞĂůƚŚLJĐŽŶƚƌŽůƐƵďũĞĐƚƐǁĞƌĞƌĞĐƌƵŝƚĞĚǀŝĂĂĚǀĞƌƟƐĞŵĞŶƚƐ ŝŶ ŶĞǁƐƉĂƉĞƌƐ ĂŶĚ ƐĐƌĞĞŶĞĚ ƚŽ ĞdžĐůƵĚĞ ƚŚŽƐĞ ǁŝƚŚ Ă ŚŝƐƚŽƌLJ ŽĨ s͕ ĐĂƌĚŝŽǀĂƐĐƵůĂƌ ƌŝƐŬ ĨĂĐƚŽƌƐ Žƌ ŵĞĚŝĐĂƟŽŶ ƵƐĞ͘ ůů ŚĞĂůƚŚLJ ĐŽŶƚƌŽůƐ ƐƵďũĞĐƚƐ ŚĂĚ Ă ǀĂůƵĞ ŽĨ njĞƌŽ ĨŽƌ ĐŽƌŽŶĂƌLJ ĐĂůĐŝƵŵ ƐĐŽƌĞ͘ džĐůƵƐŝŽŶ ĐƌŝƚĞƌŝĂ ĨŽƌ Ăůů ƐƵďũĞĐƚƐ ǁĞƌĞ ĂŐĞ фϰϬ LJĞĂƌƐ͕ ĚŝĂďĞƚĞƐ ŵĞůůŝƚƵƐ Žƌ ŝŶŇĂŵŵĂƚŽƌLJŽƌŵĂůŝŐŶĂŶƚĚŝƐĞĂƐĞ͘18&Ͳ&'WdͬdǁĂƐƉĞƌĨŽƌŵĞĚĂƚƚŚĞĐĂĚĞŵŝĐDĞĚŝĐĂů ĞŶƚĞƌ͕ ŵƐƚĞƌĚĂŵ͕ dŚĞ EĞƚŚĞƌůĂŶĚƐ͘ dĞŶ ƐƵďũĞĐƚƐ ƵŶĚĞƌǁĞŶƚ ƌĞƉĞĂƚĞĚ ŝŵĂŐŝŶŐ ĂŌĞƌ ϯ ǁĞĞŬƐƚŽĂƐƐĞƐƐŝŶƚĞƌƐĐĂŶƌĞƉƌŽĚƵĐŝďŝůŝƚLJ͘ůůƐƵďũĞĐƚƐƉƌŽǀŝĚĞĚǁƌŝƩĞŶŝŶĨŽƌŵĞĚĐŽŶƐĞŶƚ͘ dŚĞƐƚƵĚLJǁĂƐĂƉƉƌŽǀĞĚďLJƚŚĞůŽĐĂůŝŶƐƟƚƵƟŽŶĂůƌĞǀŝĞǁďŽĂƌĚĂŶĚĐŽŶĚƵĐƚĞĚĂĐĐŽƌĚŝŶŐ ƚŽƚŚĞƉƌŝŶĐŝƉůĞƐŽĨƚŚĞ/ŶƚĞƌŶĂƟŽŶĂůŽŶĨĞƌĞŶĐĞŽŶ,ĂƌŵŽŶŝnjĂƟŽŶʹ'ŽŽĚůŝŶŝĐĂůWƌĂĐƟĐĞ͘ ŝŽŵĞƚƌŝĐĂŶĚŝŽĐŚĞŵŝĐĂůDĞĂƐƵƌĞŵĞŶƚƐ WƌĞƐĞŶĐĞŽĨĐĂƌĚŝŽǀĂƐĐƵůĂƌƌŝƐŬĨĂĐƚŽƌƐĂŶĚƵƐĞŽĨŵĞĚŝĐĂƟŽŶǁĞƌĞĂƐƐĞƐƐĞĚďLJƋƵĞƐƟŽŶŶĂŝƌĞ͘ dƉůĂƐŵĂ ǁĂƐ ŽďƚĂŝŶĞĚ ƚŽ ŵĞĂƐƵƌĞƚŽƚĂů ĐŚŽůĞƐƚĞƌŽů ;dŚŽůͿ͕ŚŝŐŚͲĚĞŶƐŝƚLJ ůŝƉŽƉƌŽƚĞŝŶ ĐŚŽůĞƐƚĞƌŽů ;,>ͲĐͿ͕ ƚƌŝŐůLJĐĞƌŝĚĞƐ ;d'Ϳ͕ ͲƌĞĂĐƟǀĞ ƉƌŽƚĞŝŶ ;ZWͿ͕ ŐůƵĐŽƐĞ͕ ĐƌĞĂƟŶŝŶĞ͕ ůĞƵŬŽĐLJƚĞ ĂŶĚ ŵŽŶŽĐLJƚĞ ĐŽƵŶƚƐ͕ ƵƐŝŶŐ ĐŽŵŵĞƌĐŝĂůůLJ ĂǀĂŝůĂďůĞ ĞŶnjLJŵĂƟĐ ŵĞƚŚŽĚƐ͘ >ŽǁͲ ĚĞŶƐŝƚLJůŝƉŽƉƌŽƚĞŝŶĐŚŽůĞƐƚĞƌŽů;>>ͲĐͿůĞǀĞůƐǁĞƌĞĐĂůĐƵůĂƚĞĚƵƐŝŶŐƚŚĞ&ƌŝĞĚĞǁĂůĚĞƋƵĂƟŽŶ͘ ϭϴ&Ͳ&'WdͬdŝŵĂŐŝŶŐĂŶĚĂŶĂůLJƐŝƐ 18&Ͳ&'WdͬdŝŵĂŐŝŶŐǁĂƐƉĞƌĨŽƌŵĞĚŽŶĂWdͬdƐĐĂŶŶĞƌ;WŚŝůŝƉƐ͕ĞƐƚ͕ƚŚĞEĞƚŚĞƌůĂŶĚƐͿ͘ ^ƵďũĞĐƚƐĨĂƐƚĞĚĨŽƌхϲŚŽƵƌƐƉƌŝŽƌƚŽŝŶĨƵƐŝŽŶŽĨϮϬϬDƋŽĨ18&Ͳ&';ϱ͘ϱŵŝͿ͘WdŝŵĂŐŝŶŐ ǁĂƐ ŝŶŝƟĂƚĞĚ ǁŝƚŚ Ă ůŽǁͲĚŽƐĞ͕ ŶŽŶͲĐŽŶƚƌĂƐƚ ĞŶŚĂŶĐĞĚ d ĨŽƌ ĂƩĞŶƵĂƟŽŶ ĐŽƌƌĞĐƟŽŶ ĂŶĚ ĂŶĂƚŽŵŝĐ ĐŽͲƌĞŐŝƐƚƌĂƟŽŶ ;ƐůŝĐĞ ƚŚŝĐŬŶĞƐƐ ϯŵŵͿ͕ ϵϬ ŵŝŶƵƚĞƐ ĂŌĞƌ18&Ͳ&' ĂĚŵŝŶŝƐƚƌĂƟŽŶ͘ ĚĚŝƟŽŶĂůůLJ͕dƐĐĂŶƐǁĞƌĞƵƐĞĚĨŽƌĐŽƌŽŶĂƌLJĐĂůĐŝƵŵƐĐŽƌŝŶŐ;ƐĞĞƐƵƉƉůĞŵĞŶƚĂƌLJŵĞƚŚŽĚƐͿ͘ /ŵĂŐĞƐǁĞƌĞĂŶĂůLJnjĞĚƵƐŝŶŐĚĞĚŝĐĂƚĞĚƐŽŌǁĂƌĞ;KƐŝƌŝy͕'ĞŶĞǀĂ͕^ǁŝƚnjĞƌůĂŶĚ͖ŚƩƉ͗ͬͬǁǁǁ͘ ŽƐŝƌŝdžͲǀŝĞǁĞƌ͘ĐŽŵͬͿ͘^ĞĞĮŐƵƌĞϭĨŽƌĂŶŽǀĞƌǀŝĞǁŽĨƚŚĞ18&Ͳ&'ƵƉƚĂŬĞĂŶĂůLJƐŝƐĂŶĚŵĞƚƌŝĐƐ͘ 18&Ͳ&'ƵƉƚĂŬĞǁĂƐĂƐƐĞƐƐĞĚ;ϭͿŝŶƚŚĞĐĂƌŽƟĚƐƐƚĂƌƟŶŐĨƌŽŵϭƐůŝĐĞĐĂƵĚĂůƚŽƚŚĞĐĂƌŽƟĚ ďŝĨƵƌĐĂƟŽŶĚŽǁŶǁĂƌĚƐ͕ĂŶĚ;ϮͿŝŶƚŚĞĂŽƌƚĂĨƌŽŵϭƐůŝĐĞĐƌĂŶŝĂůƚŽƚŚĞƉƵůŵŽŶĂƌLJĂƌƚĞƌŝĞƐ ƵƉǁĂƌĚƐ͕ĂƐƉĞƌƐƚĂŶĚĂƌĚŵĞƚŚŽĚƐ33͘&ƌŽŵĞĂĐŚƌĞŐŝŽŶŽĨŝŶƚĞƌĞƐƚ;ZK/Ϳ͕ƐƚĂŶĚĂƌĚŝnjĞĚƵƉƚĂŬĞ ǀĂůƵĞƐ ;^hsƐͿ ǁĞƌĞ ƌĞĂĚ͘ ^hs ƌĞƉƌĞƐĞŶƚƐ18&Ͳ&' ĂĐƟǀŝƚLJ ĂĚũƵƐƚĞĚ ĨŽƌ ƚŚĞ ĂĚŵŝŶŝƐƚĞƌĞĚ 18&Ͳ&'ĚŽƐĞ͕ĐŽƌƌĞĐƚĞĚĨŽƌĚĞĐĂLJĂŶĚĚŝǀŝĚĞĚďLJďŽĚLJǁĞŝŐŚƚ͘

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2

dŽ ĐŽƌƌĞĐƚ ĨŽƌ ďĂĐŬŐƌŽƵŶĚ18&Ͳ&'͕ ǁŚŽůĞ ĂƌƚĞƌLJ ^hs ǁĂƐ ĞŝƚŚĞƌ ƐƵďƐƚƌĂĐƚĞĚ Žƌ ĚŝǀŝĚĞĚ

;ƚĂƌŐĞƚ ƚŽ ďĂĐŬŐƌŽƵŶĚ ƌĂƟŽ͕ dZͿ ďLJ ďĂĐŬŐƌŽƵŶĚ ^hs ŽďƚĂŝŶĞĚ ĨƌŽŵ ǀĞŶŽƵƐ Žƌ ƌĞŵŽƚĞ ĂƌƚĞƌŝĂů ďůŽŽĚ͘ ŌĞƌ ǁŚŽůĞ ĂƌƚĞƌLJ ŵĞƚƌŝĐƐ͕ ŵŽƐƚ ĚŝƐĞĂƐĞĚ ƐĞŐŵĞŶƚ dZ ;dZmdsͿ ǁĂƐ

recorded as the mean of 3 adjecent slices with the highest arterial value of SUVŵĂdž. In the ĂĐƟǀĞƐĞŐŵĞŶƚĂŶĂůLJƐŝƐ͕ƐůŝĐĞƐǁŝƚŚdZŵĂdžǀĂůƵĞĂďŽǀĞĂƉƌĞͲĚĞĮŶĞĚĐƵƚͲŽīůĞǀĞů;ĞŝƚŚĞƌ шϭ͘ϲϬ͕шϭ͘ϴϬŽƌшϮ͘ϬϬĨŽƌƚŚĞĐĂƌŽƟĚĂƌƚĞƌŝĞƐ͕ĂŶĚшϮ͘ϰϬ͕шϮ͘ϲϬŽƌшϮ͘ϴϬĨŽƌƚŚĞĂŽƌƚĂͿǁĞƌĞ ĐŽŶƐŝĚĞƌĞĚ ĂĐƟǀĞ͕ ǁŚĞƌĞĂƐ ŶŽŶͲŝŶŇĂŵĞĚ ƐĞŐŵĞŶƚƐ ǁĞƌĞ ĞdžĐůƵĚĞĚ͘ hƐŝŶŐ ƚŚŝƐ ĂƉƉƌŽĂĐŚ͕ ƚŚĞƉĞƌĐĞŶƚĂŐĞŽĨƚŚŽƐĞŚĂǀŝŶŐĂƚůĞĂƐƚϭĂĐƟǀĞƐůŝĐĞ͕ƚŚĞdZĂĐƟǀĞƐůŝĐĞƐ and the percentage of ĂĐƟǀĞƐůŝĐĞƐ;йĂĐƟǀĞƐůŝĐĞƐͿǁĞƌĞĂƐƐĞƐƐĞĚ͘

&ŝŐƵƌĞ ϭ͘ ƌƚĞƌŝĂů Wdͬd ŝŵĂŐĞƐ ĂŶĚ ĂŶĂůLJƐŝƐ ŵĞƚŚŽĚƐ͘ ;AͿ ZĞƉƌĞƐĞŶƚĂƟǀĞ d ĂŶĚ18&Ͳ&' Wdͬd ŝŵĂŐĞƐ ŽĨ

ƚŚĞĐĂƌŽƟĚƐĂƌƚĞƌŝĞƐ;ǁŚŝƚĞĂƌƌŽǁ͕LJĞůůŽǁƌĞŐŝŽŶƐŽĨŝŶƚĞƌĞƐƚ͕ZK/͛ƐͿĂŶĚũƵŐƵůĂƌǀĞŝŶƐ;ŐƌĞĞŶZK/͛ƐͿŝŶĂƉĂƟĞŶƚ ǁŝƚŚ ĐĂƌĚŝŽǀĂƐĐƵůĂƌ ĚŝƐĞĂƐĞ͘ ZĞĚ ƐĐĂůĞ ďĂƌƐ ŝŶĚŝĐĂƚĞ ϮĐŵ͘ ;ͲͿ ^ĐŚĞŵĂƟĐƐ ƐŚŽǁŝŶŐ ;BͿ ƐƚĂŶĚĂƌĚŝnjĞĚ ƵƉƚĂŬĞ ǀĂůƵĞƐ ;^hsƐͿ ŝŶ ƚŚĞ ǁŚŽůĞ ĂƌƚĞƌLJ ĂŶĚ ƚŚĞ ďĂĐŬŐƌŽƵŶĚ͕ ;CͿ ďĂĐŬŐƌŽƵŶĚ ĐŽƌƌĞĐƟŽŶƐ ĂŶĚ ;Ϳ ĂĐƟǀĞ ƐĞŐŵĞŶƚ ĂŶĂůLJƐŝƐ ǁŝƚŚ ĐŽƌƌĞƐƉŽŶĚŝŶŐ ŝŵĂŐŝŶŐ ƉĂƌĂŵĞƚĞƌƐ͘  ƐŝŵŝůĂƌ ĂŶĂůLJƐŝƐ ŝƐ ƉĞƌĨŽƌŵĞĚ ĨŽƌ ƚŚĞ ĂŽƌƟĐ ƐĞŐŵĞŶƚ͘ 18F-FDG indicates 18ŇƵŽƌŽĚĞŽdžLJŐůƵĐŽƐĞ͖ d͕ ĐŽŵƉƵƚĞĚ ƚŽŵŽŐƌĂƉŚLJ͖ D^͕ ŵŽƐƚͲĚŝƐĞĂƐĞĚ ƐĞŐŵĞŶƚ͖ Wd͕ƉŽƐŝƚƌŽŶĞŵŝƐƐŝŽŶƚŽŵŽŐƌĂƉŚLJ͖ZK/͕ƌĞŐŝŽŶƐŽĨŝŶƚĞƌĞƐƚ͖dZ͕ƚĂƌŐĞƚƚŽďĂĐŬŐƌŽƵŶĚƌĂƟŽ

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^ƚĂƟƐƟĐĂůŶĂůLJƐŝƐ ŽŶƟŶƵŽƵƐ ǀĂƌŝĂďůĞƐ ĂƌĞ ĞdžƉƌĞƐƐĞĚ ĂƐ ŵĞĂŶ ц ƐƚĂŶĚĂƌĚ ĚĞǀŝĂƟŽŶ ;^Ϳ Žƌ ŵĞĚŝĂŶ ĂŶĚ ŝŶƚĞƌƋƵĂƌƟůĞƌĂŶŐĞ;/YZͿ͕ƵŶůĞƐƐŽƚŚĞƌǁŝƐĞƐƉĞĐŝĮĞĚ͘ŝīĞƌĞŶĐĞƐŝŶ18&Ͳ&'ƵƉƚĂŬĞďĞƚǁĞĞŶ ƚŚĞĚŝīĞƌĞŶƚŐƌŽƵƉƐǁĞƌĞĂƐƐĞƐƐĞĚƵƐŝŶŐĂŵƵůƟǀĂƌŝĂƚĞŵŽĚĞůƚŽĂĐĐŽƵŶƚĨŽƌĂŐĞ͕ŐĞŶĚĞƌ͕ ŚLJƉĞƌƚĞŶƐŝŽŶ;^WхϭϰϬŵŵ,Ő͕WхϵϬŵŵ,ŐŽƌƵƐĞŽĨĂŶƟŚLJƉĞƌƚĞŶƐŝǀĞŵĞĚŝĐĂƟŽŶͿ͕D/͕ ƐŵŽŬŝŶŐ͕ĚƌƵŐƐƵƐĂŐĞ;ƐƚĂƟŶƐ͕ĞnjĞƟŵŝďĞ͕ĂĐĞŝŶŚŝďŝƚŽƌƐ͕ĂĐĞƚLJůƐĂůŝĐLJůŝĐĂĐŝĚ͕ďĞƚĂďůŽĐŬĞƌƐͿ͕ ůŝƉŝĚƉƌŽĮůĞĂŶĚŐůƵĐŽƐĞ͘tĞĞƐƟŵĂƚĞĚ^hsĂŶĚdZƵƉƉĞƌƚŚƌĞƐŚŽůĚǀĂůƵĞƐďĂƐĞĚŽŶƚŚĞ tolerance interval34 using the 95th and 90thƉĞƌĐĞŶƟůĞŽĨůŽŐͲŶŽƌŵĂů^hsĂŶĚdZŝŶŚĞĂůƚŚLJ

ĐŽŶƚƌŽůƐƵďũĞĐƚƐ͘WŽǁĞƌĂŶĂůLJƐĞƐƚŽĚĞƚĞĐƚƚŚĞƐƵƉĞƌŝŽƌŝƚLJŽĨĂƚĞƐƚŽǀĞƌĂĐŽŶƚƌŽůŝŶ^hsĂŶĚ dZǁĞƌĞďĂƐĞĚŽŶĂϮͲƐĂŵƉůĞƵŶƉĂŝƌĞĚƚƚĞƐƚ;ϮͲƐŝĚĞĚͿĂŶĚƉĞƌĨŽƌŵĞĚǁŝƚŚϴϬйƉŽǁĞƌĂŶĚ ĂŶĂůƉŚĂŽĨϱй͘dŚĞĂŐƌĞĞŵĞŶƚďĞƚǁĞĞŶƐĐĂŶƐĂŶĚĂŶĂůLJƐĞƐǁĞƌĞĂƐƐĞƐƐĞĚƵƐŝŶŐŝŶƚƌĂĐůĂƐƐ ĐŽƌƌĞůĂƟŽŶ ĐŽĞĸĐŝĞŶƚƐ ;/͕ ƌͿ ĂŶĚ ůĂŶĚͲůƚŵĂŶ ƉůŽƚƐ͘ dŚĞ ^ ŽĨ ƚŚĞ ƉĂŝƌĞĚ ĚŝīĞƌĞŶĐĞƐ ;^ƉĚͿ ĂŶĚ ƚŚĞ ĐŽĞĸĐŝĞŶƚ ŽĨ ǀĂƌŝĂƟŽŶ ;KsͿ ďĞƚǁĞĞŶ ƚŚĞ ŝŶŝƟĂů ĂŶĚ ƌĞƉĞĂƚ ƐĐĂŶƐ ǁĞƌĞ ĐĂůĐƵůĂƚĞĚ͘KsǁĂƐĐĂůĐƵůĂƚĞĚďLJĚŝǀŝĚŝŶŐƚŚĞ^ƉĚďLJƚŚĞŵĞĂŶǀĂůƵĞŽĨƚŚĞƉŽƉƵůĂƟŽŶĨŽƌ ĞĂĐŚƉĂƌĂŵĞƚĞƌ͘WǀĂůƵĞƐфϬ͘ϬϱǁĞƌĞĐŽŶƐŝĚĞƌĞĚƐƚĂƟƐƟĐĂůůLJƐŝŐŶŝĮĐĂŶƚ͘ĂƚĂǁĞƌĞĂŶĂůLJnjĞĚ ƵƐŝŶŐ^W^^ǀĞƌƐŝŽŶϭϵ͘Ϭ;^W^^/ŶĐ͕͘ŚŝĐĂŐŽ͕/ůůŝŶŽŝƐͿ͘

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2

RESULTS

ůŝŶŝĐĂůĐŚĂƌĂĐƚĞƌŝƐƟĐƐ /Ŷ ƚŽƚĂů͕ ϴϯ ƐƚƵĚLJ ƉĂƌƟĐŝƉĂŶƚƐ ;ĂŐĞĚ ϲϭцϴ LJĞĂƌƐͿ ǁĞƌĞ ŝŶĐůƵĚĞĚ͕ ĐŽŵƉƌŝƐŝŶŐ Ϯϱ ŚĞĂůƚŚLJ ĐŽŶƚƌŽůƐƵďũĞĐƚƐ͕ϮϯƉĂƟĞŶƚƐĂƚŝŶĐƌĞĂƐĞĚsƌŝƐŬ;ŵĞĚŝĂŶ&ƌĂŵŝŶŐŚĂŵƌŝƐŬƐĐŽƌĞϭϰй΀/YZ ϰ΁Ϳ͕ĂŶĚϯϱƉĂƟĞŶƚƐǁŝƚŚĂŚŝƐƚŽƌLJŽĨsĚŽĐƵŵĞŶƚĞĚĂƐƐŝŐŶŝĮĐĂŶƚĐĂƌŽƟĚĂƌƚĞƌLJƐƚĞŶŽƐŝƐ ;ŶсϭϯͿ͕ƚƌĂŶƐŝĞŶƚŝƐĐŚĞŵŝĐĂƩĂĐŬ;ŶсϵͿ͕ƐƚƌŽŬĞ;ŶсϵͿ͕ĂŶĚͬŽƌŵLJŽĐĂƌĚŝĂůŝŶĨĂƌĐƟŽŶ;ŶсϮϱͿ͘ ^ƵďũĞĐƚĚĞŵŽŐƌĂƉŚŝĐƐĂƌĞůŝƐƚĞĚŝŶdĂďůĞϭ͘ dĂďůĞϭ͘ůŝŶŝĐĂůĐŚĂƌĂĐƚĞƌŝƐƟĐƐŽĨƐƚƵĚLJƐƵďũĞĐƚƐ ŚĂƌĂĐƚĞƌŝƐƟĐƐ ,ĞĂůƚŚLJĐŽŶƚƌŽů ƐƵďũĞĐƚƐ;ŶсϮϱͿ WĂƟĞŶƚƐĂƚ ŝŶĐƌĞĂƐĞĚs ƌŝƐŬ;ŶсϮϯͿ WĂƟĞŶƚƐǁŝƚŚ ŬŶŽǁŶs ;ŶсϯϱͿ WͲǀĂůƵĞ # WͲǀĂůƵĞ ^ ŐĞ͕LJ ϲϬцϭϭ ϱϵцϲ ϲϯцϳ ns ns 'ĞŶĚĞƌ͕йŵĂůĞ;ŶͿ ϲϬ;ϭϱͿ ϳϰ;ϭϳͿ ϳϳ;ϮϳͿ ns ns D/͕ŬŐͬŵ2 Ϯϱцϯ Ϯϲцϯ Ϯϳцϰ ns ns ^W͕ŵŵ,Ő ϭϯϰцϭϲ ϭϯϱцϵ ϭϯϯцϴ ns ns W͕ŵŵ,Ő ϴϭцϭϬ ϴϮцϴ ϴϭцϳ ns ns ^ŵŽŬŝŶŐ͕йĂĐƟǀĞ;ŶͿ Ϭ;ϬͿ Ϭ;ϬͿ ϭϰ;ϱͿ 0.026 0.012 >ŝƉŝĚͲůŽǁĞƌŝŶŐĚƌƵŐƐ͕йLJĞƐ Ϭ;ϬͿ ϴϯ;ϭϵͿ ϭϬϬ;ϯϱͿ фϬ͘ϬϬϭ ns ^ƚĂƟŶƵƐĞ͕й;ŶͿ Ϭ;ϬͿ ϴϯ;ϭϵͿ ϴϲ;ϯϬͿ фϬ͘ϬϬϭ ns njĞƟŵŝďĞƵƐĞ;йͿ Ϭ;ϬͿ Ϭ;ϬͿ ϭϰ;ϱͿ фϬ͘ϬϬϭ фϬ͘ϬϬϭ ͲŝŶŚŝďŝƚŽƌƵƐĞ;йͿ Ϭ;ϬͿ ϵϭ;ϮϭͿ ϭϬϬ;ϯϱͿ фϬ͘ϬϬϭ ns ĐĞƚLJůƐĂůŝĐLJůŝĐĂĐŝĚƵƐĞ;йͿ Ϭ;ϬͿ ϳϬ;ϭϲͿ ϭϬϬ;ϯϱͿ фϬ͘ϬϬϭ ns ͲďůŽĐŬĞƌƵƐĞ͕йLJĞƐ Ϭ;ϬͿ ϳϰ;ϭϳͿ ϭϬϬ;ϯϱͿ фϬ͘ϬϬϭ ns dŚŽů͕ŵŵŽůͬ> ϱ͘ϯϮцϬ͘ϵϲ ϳ͘ϯϯцϮ͘ϴϭ ϱ͘ϵϵцϯ͘ϭϲ 0.040 ns >>Đ͕ŵŵŽůͬ> ϯ͘ϮϰцϬ͘ϵϳ ϱ͘ϰϮцϮ͘ϲϯ ϰ͘ϭϴцϯ͘ϭϭ 0.011 ns ,>Đ͕ŵŵŽůͬ> ϭ͘ϲϱцϬ͘ϯϳ ϭ͘ϮϭцϬ͘Ϯϱ ϭ͘ϮϰцϬ͘ϯϳ фϬ͘ϬϬϭ ns d'͕ŵŵŽůͬ> 0.89[0.84] 1.57[0.99] 1.42[0.91] 0.001 ns 'ůƵĐŽƐĞ͕ŵŵŽůͬ> ϱ͘ϬϰцϬ͘ϯϯ ϱ͘ϰϬцϬ͘ϳϱ ϱ͘ϰϭцϭ͘ϭϵ ns ns ƌĞĂƟŶŝŶĞ͕ђŵŽůͬ> 79[16] 80[17] 82[17] ns ns >ĞƵŬŽĐLJƚĞƐ͕ϭϬΔϵͬ> ϲ͘ϭϬцϭ͘ϳϰ ϲ͘ϯϬцϮ͘ϱϰ ϲ͘Ϯϵцϭ͘ϱϮ ns ns DŽŶŽĐLJƚĞƐ͕ϭϬΔϵͬ> Ϭ͘ϰϱцϬ͘ϭϯ Ϭ͘ϱϭцϬ͘ϭϲ Ϭ͘ϱϰцϬ͘ϮϬ ns ns ZW͕ŵŐͬ> 1.30 [1.35] 1.20 [2.00] 2.30 [3.30] ns ns CACscores* Ϭ;ϬͿ ϯϬϯ;ϭϭϬͿ ϲϵϭ;ϯϳϮͿ фϬ͘ϬϬϭ фϬ͘ϬϬϭ ĂƚĂ ĂƌĞ ĞdžƉƌĞƐƐĞĚ ĂƐ ŵĞĂŶц^͕ ƉĞƌĐĞŶƚĂŐĞ;ŶƵŵďĞƌͿ Žƌ ŵĞĚŝĂŶ΀/YZ΁͘ η WͲǀĂůƵĞ ďĞƚǁĞĞŶ Ăůů ŐƌŽƵƉƐ͘ Δ WͲǀĂůƵĞ ďĞƚǁĞĞŶƉĂƟĞŶƚƐĂƚŝŶĐƌĞĂƐĞĚsƌŝƐŬĂŶĚƉĂƟĞŶƚƐǁŝƚŚŬŶŽǁŶĚŝƐĞĂƐĞ͘ΎŐĂƚƐƚŽŶƐĐŽƌĞ͘D/ŝŶĚŝĐĂƚĞƐďŽĚLJ ŵĂƐƐ ŝŶĚĞdž͖  ƐĐŽƌĞ͕ ĐŽƌŽŶĂƌLJ ĂƌƚĞƌLJ ĐĂůĐŝƵŵ ƐĐŽƌĞ͖ ZW͕ ͲƌĞĂĐƟǀĞ ƉƌŽƚĞŝŶ͖ W͕ ĚŝĂƐƚŽůŝĐ ďůŽŽĚ ƉƌĞƐƐƵƌĞ͖ ,>ͲĐ͕ŚŝŐŚͲĚĞŶƐŝƚLJůŝƉŽƉƌŽƚĞŝŶĐŚŽůĞƐƚĞƌŽů͖>>ͲĐ͕ůŽǁͲĚĞŶƐŝƚLJůŝƉŽƉƌŽƚĞŝŶĐŚŽůĞƐƚĞƌŽů͖^W͕ƐLJƐƚŽůŝĐďůŽŽĚƉƌĞƐƐƵƌĞ͖ dŚŽů͕ƚŽƚĂůĐŚŽůĞƐƚĞƌŽů͖d'͕ƚƌŝŐůLJĐĞƌŝĚĞƐ͘

(27)

tŚŽůĞĂƌƚĞƌLJϭϴ&Ͳ&'ƵƉƚĂŬĞ tŚŽůĞ ĂƌƚĞƌLJ18&Ͳ&' ŝŶ ƚŚĞ ĐĂƌŽƟĚƐ ĂŶĚ ĂŽƌƚĂ͕ ĞdžƉƌĞƐƐĞĚ ĂƐ ^hs ŵĂdž͕showed a gradual ŝŶĐƌĞĂƐĞĨƌŽŵŚĞĂůƚŚLJƚŽĚŝƐĞĂƐĞĚƐƵďũĞĐƚƐ;dĂďůĞϮͿ͘dŚĞŵĞĂŶĚŝīĞƌĞŶĐĞŝŶ^hsŵĂdž between ŚĞĂůƚŚLJ ĐŽŶƚƌŽů ƐƵďũĞĐƚƐ ĂŶĚ ƚŚŽƐĞ Ăƚ ŝŶĐƌĞĂƐĞĚ s ƌŝƐŬ ǁĂƐ Ϭ͘ϯϬцϬ͘Ϭϴ ĨŽƌ ƚŚĞ ĐĂƌŽƟĚƐ͕ ĂŶĚϬ͘ϯϲцϬ͘ϬϵĨŽƌƚŚĞĂŽƌƚĂ͘dŚĞŵĞĂŶĚŝīĞƌĞŶĐĞŝŶ^hsŵĂdžďĞƚǁĞĞŶƉĂƟĞŶƚƐĂƚŝŶĐƌĞĂƐĞĚ sƌŝƐŬĂŶĚƉĂƟĞŶƚƐǁŝƚŚŬŶŽǁŶsǁĂƐϬ͘ϭϬцϬ͘ϬϴĨŽƌƚŚĞĐĂƌŽƟĚƐĂŶĚϬ͘ϮϴцϬ͘ϭϬĨŽƌƚŚĞ ĂŽƌƚĂ͘ĞĨŽƌĞĐĂůĐƵůĂƟŶŐƐƵďƚƌĂĐƟŽŶŽƌƌĂƟŽŵĞƚƌŝĐƐ͕ǁĞĚĞŵŽŶƐƚƌĂƚĞĚƚŚĂƚďŽƚŚǀĞŶŽƵƐ and arterial blood 18&Ͳ&'ďĂĐŬŐƌŽƵŶĚǀĂůƵĞƐǁĞƌĞĐŽŵƉĂƌĂďůĞďĞƚǁĞĞŶŐƌŽƵƉƐ;dĂďůĞϮ͕

^ƵƉƉůĞŵĞŶƚĂƌLJdĂďůĞ^ϮͿ͘/ŶůŝŶĞǁŝƚŚƚŚŝƐŽďƐĞƌǀĂƟŽŶ͕18&Ͳ&'ďĂĐŬŐƌŽƵŶĚĐŽƌƌĞĐƟŽŶƐŽĨ ƚŚĞ^hsǀĂůƵĞƐǁŝƚŚĞŝƚŚĞƌƐƵďƚƌĂĐƟŽŶŽƌƌĂƟŽ;dZͿĚŝĚŶŽƚĂīĞĐƚƚŚĞƐŝŐŶŝĮĐĂŶĐĞďĞƚǁĞĞŶ ŐƌŽƵƉƐ;dĂďůĞϮĂŶĚ^ƵƉƉůĞŵĞŶƚĂƌLJdĂďůĞ^ϮͿ͘ dĂďůĞϮ͘tŚŽůĞĂƌƚĞƌLJĂŶĚĂĐƟǀĞƐĞŐŵĞŶƚďĂƐĞĚ18&Ͳ&'ƵƉƚĂŬĞŝŶƐƚƵĚLJŐƌŽƵƉƐ ,ĞĂůƚŚLJĐŽŶƚƌŽů ƐƵďũĞĐƚƐ WĂƟĞŶƚƐĂƚ ŝŶĐƌĞĂƐĞĚs ƌŝƐŬ WĂƟĞŶƚƐǁŝƚŚ ŬŶŽǁŶs WͲǀĂůƵĞΎ tŚŽůĞĂƌƚĞƌLJ^hsmax ĂƌŽƟĚĂƌƚĞƌŝĞƐ ϭ͘ϰϵцϬ͘Ϯϴ ϭ͘ϳϵцϬ͘Ϯϳ ϭ͘ϵϵцϬ͘ϯϳ фϬ͘ϬϬϭ Ascending aorta ϭ͘ϵϴцϬ͘ϯϭ Ϯ͘ϯϰцϬ͘ϯϭ Ϯ͘ϲϯцϬ͘ϲϯ фϬ͘ϬϬϭ sĞŶŽƵƐďĂĐŬŐƌŽƵŶĚ^hsŵĞĂŶ Jugular veins Ϭ͘ϴϰцϬ͘ϭϯ Ϭ͘ϵϮцϬ͘ϭϰ Ϭ͘ϵϯцϬ͘ϭϴ ns Superior vena cava Ϭ͘ϵϲцϬ͘ϭϭ Ϭ͘ϴϰцϬ͘ϭϲ Ϭ͘ϵϬцϬ͘ϮϬ ns

ƌƚĞƌŝĂů^hsʹǀĞŶŽƵƐ^hsŵĞĂŶ ĂƌŽƟĚĂƌƚĞƌŝĞƐ Ϭ͘ϱϯцϬ͘ϮϬ Ϭ͘ϴϲцϬ͘ϮϮ Ϭ͘ϵϲцϬ͘Ϯϴ фϬ͘ϬϬϭ Ascending aorta ϭ͘ϭϰцϬ͘ϮϮ ϭ͘ϰϵцϬ͘Ϯϯ ϭ͘ϳϯцϬ͘ϱϰ фϬ͘ϬϬϭ tŚŽůĞĂƌƚĞƌLJdZmax§ ĂƌŽƟĚĂƌƚĞƌŝĞƐ ϭ͘ϱϱцϬ͘Ϯϯ ϭ͘ϵϰцϬ͘Ϯϳ Ϯ͘ϭϯцϬ͘ϯϬ фϬ͘ϬϬϭ Ascending aorta Ϯ͘ϯϲцϬ͘Ϯϱ Ϯ͘ϴϬцϬ͘ϯϭ Ϯ͘ϵϳцϬ͘ϱϵ фϬ͘ϬϬϭ ĐƟǀĞƐĞŐŵĞŶƚĂƉƉƌŽĂĐŚ ĂƌŽƟĚĂƌƚĞƌŝĞƐ ;ĂĐƟǀĞшϭ͘ϲϬͿ ϰϴйŽĨƐƵďũĞĐƚƐ ϵϲйŽĨƉĂƟĞŶƚƐ ϭϬϬйŽĨƉĂƟĞŶƚƐ йĂĐƟǀĞƐůŝĐĞƐ ϯϮцϰϬй ϴϬцϯϭй ϵϬцϭϵй 0.020 dZĂĐƟǀĞƐůŝĐĞƐ ϭ͘ϳϵцϬ͘ϭϮ Ϯ͘ϬϬцϬ͘Ϯϵ Ϯ͘ϬϵцϬ͘ϯϮ 0.044 Ascending aorta ;ĂĐƟǀĞшϮ͘ϰϬͿ ϴϴйŽĨƐƵďũĞĐƚƐ ϵϲйŽĨƉĂƟĞŶƚƐ ϵϳйŽĨƉĂƟĞŶƚƐ йĂĐƟǀĞƐůŝĐĞƐ ϳϰцϯϬй ϴϴцϮϱй ϵϭцϭϴй ns dZĂĐƟǀĞƐůŝĐĞƐ Ϯ͘ϳϬцϬ͘Ϯϭ Ϯ͘ϵϳцϬ͘ϰϬ ϯ͘ϬϬцϬ͘ϰϵ ns DƵůƟǀĂƌŝĂƚĞ ĂŶĂůLJƐŝƐ ĂĚũƵƐƚĞĚ ĨŽƌ ĂŐĞ͕ ŐĞŶĚĞƌ͕ ŚLJƉĞƌƚĞŶƐŝŽŶ͕ ƐŵŽŬŝŶŐ͕ ďŽĚLJ ŵĂƐƐ ŝŶĚĞdž͕ ĚƌƵŐ ƵƐĂŐĞ͕ ůŝƉŝĚ ƉƌŽĮůĞ ĂŶĚ ŐůƵĐŽƐĞ͘ dZ ŝŶĚŝĐĂƚĞƐ ƚĂƌŐĞƚ ƚŽ ďĂĐŬŐƌŽƵŶĚ ƌĂƟŽ͖ s͕ ĐĂƌĚŝŽǀĂƐĐƵůĂƌ ĚŝƐĞĂƐĞ ΑdZсƚĂƌŐĞƚ^hsŵĂdžͬǀĞŶŽƵƐďĂĐŬŐƌŽƵŶĚ^hsmean

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2

ĐƟǀĞƐĞŐŵĞŶƚĂƉƉƌŽĂĐŚ tĞĂůƐŽĞdžĂŵŝŶĞĚƚŚĞdZŽĨƚŚĞŵŽƐƚĚŝƐĞĂƐĞĚƐĞŐŵĞŶƚ;dZŵĚƐ͕^ƵƉƉůĞŵĞŶƚĂƌLJdĂďůĞ^ϮͿ͘ /ŶĂĚĚŝƟŽŶ͕ĂŶĂĐƟǀĞƐĞŐŵĞŶƚĂŶĂůLJƐŝƐǁĂƐƉĞƌĨŽƌŵĞĚƵƐŝŶŐƐĞǀĞƌĂůƉƌĞͲĚĞĮŶĞĚĐƵƚͲŽīƐ͘ hƐŝŶŐĂĐƵƚŽīŽĨdZшϭ͘ϲϬĨŽƌƚŚĞĐĂƌŽƟĚƐ͕ϰϴйŽĨƚŚĞŚĞĂůƚŚLJƐƵďũĞĐƚƐŚĂĚĂƚůĞĂƐƚϭĂĐƟǀĞ ƐůŝĐĞĐŽŵƉĂƌĞĚǁŝƚŚϵϲйĂŶĚϭϬϬйŽĨƚŚĞƉĂƟĞŶƚƐĂƚƌŝƐŬĨŽƌŽƌǁŝƚŚŬŶŽǁŶs͕ƌĞƐƉĞĐƟǀĞůLJ ;dĂďůĞϮͿ͘dŚĞƉĞƌĐĞŶƚĂŐĞŽĨĂĐƟǀĞƐůŝĐĞƐǁĂƐϯϮцϰϬйŝŶŚĞĂůƚŚLJĐŽŶƚƌŽůƐƵďũĞĐƚƐ͕ϴϬцϯϭй ŝŶƉĂƟĞŶƚƐĂƚƌŝƐŬĨŽƌsĂŶĚϵϬцϭϵйŝŶŬŶŽǁŶsƉĂƟĞŶƚƐ;ƉсϬ͘ϬϮϬͿ͘dŚĞĐŽƌƌĞƐƉŽŶĚŝŶŐ dZĂĐƟǀĞ ƐůŝĐĞƐǀĂůƵĞƐ ǁĞƌĞ ĂůƐŽ ĚŝƐƟŶĐƚ ďĞƚǁĞĞŶ ŐƌŽƵƉƐ ;ƉсϬ͘Ϭϰϰ͖ dĂďůĞ ϮͿ͘ tŝƚŚ ĐƵƚŽīƐ ŽĨ шϭ͘ϴϬŽƌшϮ͘ϬϬ͕ƚŚĞŶƵŵďĞƌŽĨŚĞĂůƚŚLJĐŽŶƚƌŽůƐƵďũĞĐƚƐǁŝƚŚĂƚůĞĂƐƚϭĂĐƟǀĞƐůŝĐĞŝŶƚŚĞ ĐĂƌŽƟĚƐĚĞĐƌĞĂƐĞĚƐƵďƐƚĂŶƟĂůůLJ;^ƵƉƉůĞŵĞŶƚĂƌLJdĂďůĞ^ϯͿ͘tŚĞƌĞĂƐƚŚĞйĂĐƟǀĞƐůŝĐĞƐ remained ƐŝŐŶŝĮĐĂŶƚůLJĚŝīĞƌĞŶƚďĞƚǁĞĞŶŐƌŽƵƉƐ͕ƚŚĞdZĂĐƟǀĞƐůŝĐĞƐĚŝĚŶŽƚ;^ƵƉƉůĞŵĞŶƚĂƌLJdĂďůĞ^ϯͿ͘ /ŶĐŽŶƚƌĂƐƚƚŽƚŚĞĐĂƌŽƟĚƐ͕ĂŵƵĐŚůĂƌŐĞƌƉƌŽƉŽƌƟŽŶŽĨƚŚĞƐƵďũĞĐƚƐŚĂĚĂĐƟǀĞĂŽƌƟĐǁĂůůƐ͘ tŝƚŚ Ă ĐƵƚŽī ŽĨ шϮ͘ϰϬ͕ ϴϴй ŽĨ ƚŚĞ ŚĞĂůƚŚLJ ƐƵďũĞĐƚƐ ŚĂĚ Ăƚ ůĞĂƐƚ ϭ ĂĐƟǀĞ ƐůŝĐĞ͕ ŚŽǁĞǀĞƌ͕ ƚŚĞdZĂĐƟǀĞƐůŝĐĞƐĂŶĚйĂĐƟǀĞƐůŝĐĞƐǁĞƌĞŶŽƚĚŝƐƟŶĐƚďĞƚǁĞĞŶŐƌŽƵƉƐ;dĂďůĞϮͿ͘tŝƚŚƚŚĞĂĐƟǀĞͲ ĚĞĮŶŝƟŽŶĂƚшϮ͘ϲϬŽƌшϮ͘ϴϬ͕ƐƟůůŵŽƌĞƚŚĂŶŚĂůĨŽĨƚŚĞŚĞĂůƚŚLJƐƵďũĞĐƚƐŚĂĚĂĐƟǀĞƐĞŐŵĞŶƚƐ ;^ƵƉƉůĞŵĞŶƚĂƌLJ dĂďůĞ ^ϯͿ͘ &Žƌ ƚŚĞ ŚŝŐŚĞƐƚ ĐƵƚŽī͕ dZ ĂĐƟǀĞ ƐůŝĐĞƐ ǁĂƐ ƐŝŐŶŝĮĐĂŶƚůLJ ĚŝīĞƌĞŶƚ ďĞƚǁĞĞŶŐƌŽƵƉƐ;ƉсϬ͘ϬϭϱͿ͘ dŚƌĞƐŚŽůĚƐ dŚĞdZƚŚƌĞƐŚŽůĚƐďĂƐĞĚŽŶƚŚĞƚŽůĞƌĂŶĐĞŝŶƚĞƌǀĂůŝŶŚĞĂůƚŚLJĐŽŶƚƌŽůƐƵďũĞĐƚƐĂƌĞůŝƐƚĞĚŝŶ dĂďůĞϯ͘ĂƐĞĚŽŶƚŚĞϵϬthƉĞƌĐĞŶƟůĞŽĨƚŚŝƐŝŶƚĞƌǀĂů͕ƚŚĞƚŚƌĞƐŚŽůĚĨŽƌ^hs ŵĂdž was 1.85 for ƚŚĞĐĂƌŽƟĚƐĂŶĚϮ͘ϯϴĨŽƌƚŚĞĂŽƌƚĂ͘&ŽƌdZŵĂdž͕ƚŚŝƐƚŚƌĞƐŚŽůĚǁĂƐƐĞƚĂƚϭ͘ϴϰĨŽƌƚŚĞĐĂƌŽƟĚƐ and 2.68 for the aorta. Figure 2 illustrates both the SUVŵĂdžĂŶĚdZŵĂdžǀĂůƵĞƐƉĞƌŐƌŽƵƉ͕ǁŝƚŚ ĐŽƌƌĞƐƉŽŶĚŝŶŐƚŚƌĞƐŚŽůĚƐ;ƌĞĚĚĂƐŚĞĚůŝŶĞƐͿ͘&Žƌ^hsŵĂdž͕ϯϵͲϰϯйŽĨƚŚŽƐĞĂƚŝŶĐƌĞĂƐĞĚs ƌŝƐŬǀĞƌƐƵƐϲϲйŽĨƚŚĞsƉĂƟĞŶƚƐĞdžĐĞĞĚĞĚƚŚĞƐĞƚƌĞƐŚŽůĚƐ͘&ŽƌdZŵĂdž͕these numbers ǁĞƌĞŝŶŐĞŶĞƌĂůůĂƌŐĞƌ͖ϱϮͲϱϳйŽĨƚŚŽƐĞĂƚŝŶĐƌĞĂƐĞĚsƌŝƐŬĂŶĚϲϳͲϳϰйŽĨsƉĂƟĞŶƚƐ͘ /Ŷ^ƵƉƉůĞŵĞŶƚĂƌLJdĂďůĞ^ϰ͕ǁĞĂůƐŽƉƌŽǀŝĚĞƚŚĞƚŚƌĞƐŚŽůĚƐƵƐŝŶŐƚŚĞϵϱthƉĞƌĐĞŶƟůĞǀĂůƵĞƐ͘ dĂďůĞϯ͘ 18&Ͳ&'ƵƉƚĂŬĞƚŚƌĞƐŚŽůĚǀĂůƵĞƐ ƌƚĞƌLJ DĞƚƌŝĐ dŚƌĞƐŚŽůĚΎ WĞƌĐĞŶƚĂŐĞĂďŽǀĞƚŚƌĞƐŚŽůĚ WĂƟĞŶƚƐĂƚŝŶĐƌĞĂƐĞĚ sƌŝƐŬ;йͿ WĂƟĞŶƚƐǁŝƚŚŬŶŽǁŶs;йͿ ĂƌŽƟĚ SUVŵĂdž хϭ͘ϴϱ 39 66 dZŵĂdž хϭ͘ϴϰ 52 74 Aorta SUVŵĂdž хϮ͘ϯϴ 43 66 dZŵĂdž хϮ͘ϲϴ 57 67 ΎdŚƌĞƐŚŽůĚƐ ǁĞƌĞ ĚĞƚĞƌŵŝŶĞĚ ƵƐŝŶŐ ƚŚĞ ϵϬƚŚ ƉĞƌĐĞŶƟůĞ ǀĂůƵĞ ŽďƐĞƌǀĞĚ ŝŶ ƚŚĞ ŚĞĂůƚŚLJ ĐŽŶƚƌŽů ƐƵďũĞĐƚƐ͘

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&ŝŐƵƌĞϮ͘'ƌĂĚƵĂůŝŶĐƌĞĂƐĞŽĨdZŵĂdžŝŶƚŚĞĐĂƌŽƟĚƐĂŶĚĂŽƌƚĂďĞƚǁĞĞŶŐƌŽƵƉƐ͘^ĐĂƩĞƌƉůŽƚƐƐŚŽǁŝŶŐƚŚĞŐƌĂĚƵĂů increase in SUVŵĂdžĂŶĚdZŵĂdžĨŽƌďŽƚŚƚŚĞĐĂƌŽƟĚƐ;͕ͿĂŶĚĂŽƌƚĂ;͕ͿŝŶŚĞĂůƚŚLJĐŽŶƚƌŽůƐƵďũĞĐƚƐ͕ƉĂƟĞŶƚƐĂƚ sƌŝƐŬĂŶĚƉĂƟĞŶƚƐǁŝƚŚŬŶŽǁŶs͘dŚĞƌĞĚĚĂƐŚĞĚůŝŶĞƌĞƉƌĞƐĞŶƚƐƚŚĞϵϬthƉĞƌĐĞŶƟůĞǀĂůƵĞŝŶŚĞĂůƚŚLJĐŽŶƚƌŽů subjects. sŝŶĚŝĐĂƚĞƐĐĂƌĚŝŽǀĂƐĐƵůĂƌĚŝƐĞĂƐĞ͖dZ͕ƚĂƌŐĞƚƚŽďĂĐŬŐƌŽƵŶĚƌĂƟŽ ^ĂŵƉůĞƐŝnjĞƐ ĂƐĞĚŽŶƚŚĞdZŵĂdžǀĂůƵĞƐŝŶƚŚĞƉƌĞƐĞŶƚƐƚƵĚLJ͕&ŝŐƵƌĞϯĚĞƉŝĐƚƐƚŚĞƐĂŵƉůĞƐŝnjĞƐƌĞƋƵŝƌĞĚ ĨŽƌĂŶĞƐƟŵĂƚĞĚĚƌƵŐĞīĞĐƚ͖ƌĂŶŐŝŶŐĨƌŽŵϱƚŽϮϬй͕ĂƐŚĂƐďĞĞŶŽďƐĞƌǀĞĚŝŶƉƌĞǀŝŽƵƐĚƌƵŐ ƚƌŝĂůƐ ;^ƵƉƉůĞŵĞŶƚĂƌLJdĂďůĞ^ϭͿ͘ ĂƌŽƟĚ dZĂƐƉƌŝŵĂƌLJĞŶĚƉŽŝŶƚƌĞƋƵŝƌĞƐĂƉƉƌŽdžŝŵĂƚĞůLJ ϮϬйĨĞǁĞƌƐƵďũĞĐƚƐĐŽŵƉĂƌĞĚǁŝƚŚƚŚĞĂŽƌƚĂ͘KĨŶŽƚĞ͕ƐĂŵƉůĞƐŝnjĞƐďĂƐĞĚƵƉŽŶ^hsŵĂdž values ŶĞĐĞƐƐŝƚĂƚĞĂƉƉƌŽdžŝŵĂƚĞůLJϮϬƚŽϰϱйŵŽƌĞƐƵďũĞĐƚƐĐŽŵƉĂƌĞĚǁŝƚŚdZŵĂdž;^ƵƉƉůĞŵĞŶƚĂƌLJ &ŝŐƵƌĞ^ϭͿ͘

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2

&ŝŐƵƌĞ ϯ͘ ƐƟŵĂƚĞĚ ƐĂŵƉůĞ ƐŝnjĞƐ ĨŽƌ ŝŶƚĞƌǀĞŶƟŽŶ ƐƚƵĚŝĞƐ͘ ^ĂŵƉůĞ ƐŝnjĞƐ ƌĞƋƵŝƌĞĚ ĨŽƌ ƐƚƵĚŝĞƐ ƵƐŝŶŐ dZŵĂdž as the ƉƌŝŵĂƌLJĞŶĚƉŽŝŶƚ͘dŚĞƐĞĂƌĞĚĞƉĞŶĚĞŶƚŽŶƚŚĞĞƐƟŵĂƚĞĚĚƌƵŐĞīĞĐƚ;ƌĂŶŐŝŶŐďĞƚǁĞĞŶϱĂŶĚϮϬйͿĂŶĚƚĂƌŐĞƚ ǀĞƐƐĞůĨŽƌŝŵĂŐŝŶŐ;ĐĂƌŽƟĚĂƌƚĞƌLJĂŶĚĂŽƌƚĂͿ͘dZŝŶĚŝĐĂƚĞƐƚĂƌŐĞƚƚŽďĂĐŬŐƌŽƵŶĚƌĂƟŽ ZĞƉƌŽĚƵĐŝďŝůŝƚLJ dŚĞ ŝŶƚƌĂͲ ĂŶĚ ŝŶƚĞƌͲŽďƐĞƌǀĞƌ͕ ĂŶĚ ŝŶƚĞƌƐĐĂŶ ĂŐƌĞĞŵĞŶƚ ǁŝƚŚŝŶ ϯ ǁĞĞŬƐ ǁĂƐ ĞdžĐĞůůĞŶƚ ĨŽƌ dZŵĂdž ĂƐ ŝŶĚŝĐĂƚĞĚ ďLJ ;ŝͿ ƚŚĞ / ǀĂůƵĞƐ ŽĨ хϬ͘ϵϱ ǁŝƚŚ ŶĂƌƌŽǁ ϵϱй ĐŽŶĮĚĞŶĐĞ ŝŶƚĞƌǀĂůƐ͕ ĂŶĚ;ŝŝͿƚŚĞĂďƐĞŶĐĞŽĨĮdžĞĚŽƌƉƌŽƉŽƌƟŽŶĂůďŝĂƐŝŶƚŚĞůĂŶĚͲůƚŵĂŶƉůŽƚƐ;^ƵƉƉůĞŵĞŶƚĂƌLJ &ŝŐƵƌĞϮͿ͘/ŶĂĚĚŝƟŽŶ͕ĂŐƌĞĞŵĞŶƚĨŽƌĂůů18&Ͳ&'ŵĞƚƌŝĐƐǁĂƐĂůƐŽĞdžĐĞůůĞŶƚŝŶŚĞĂƚůŚLJĐŽŶƚƌŽů ƐƵďũĞĐƚƐ;^ƵƉƉůĞŵĞŶƚĂƌLJdĂďůĞϰ͕ϱͿ͘

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/ŶƚŚĞƉƌĞƐĞŶƚǁŽƌŬ͕ǁĞƚĞƐƚĞĚϱĨƌĞƋƵĞŶƚůLJĂƉƉůŝĞĚĂƉƉƌŽĂĐŚĞƐƚŽƋƵĂŶƟĨLJ18&Ͳ&'ƵƉƚĂŬĞ ŝŶƚŚĞĂƌƚĞƌŝĂůǁĂůůŽĨŚĞĂůƚŚLJĐŽŶƚƌŽůƐƵďũĞĐƚƐ͕ƉĂƟĞŶƚƐĂƚƌŝƐŬĂŶĚƉĂƟĞŶƚƐǁŝƚŚŬŶŽǁŶs͘ tŚŽůĞĂƌƚĞƌLJ^hsŵĂdžǁĂƐƐŝŐŶŝĮĐĂŶƚůLJĚŝīĞƌĞŶƚďĞƚǁĞĞŶŐƌŽƵƉƐ͕ĂŶĚ18&Ͳ&'ǀĞŶŽƵƐďůŽŽĚ ďĂĐŬŐƌŽƵŶĚ ǀĂůƵĞƐ ǁĞƌĞ ƐŝŵŝůĂƌ͘ Ɛ ƐƵĐŚ͕18&Ͳ&' ŵĞƚƌŝĐƐ ǁŝƚŚ ďĂĐŬŐƌŽƵŶĚ ĐŽƌƌĞĐƟŽŶƐ͕ ƐƵĐŚĂƐƚŚĞƐƵďƚƌĂĐƟŽŶŽƌƌĂƟŽŵĞƚŚŽĚ;dZͿ͕ƌĞŵĂŝŶĞĚƐŝŐŶŝĮĐĂŶƚůLJĚŝīĞƌĞŶƚ͘DŽƌĞŽǀĞƌ͕ ƚŚĞdZĂŶĚĂĐƟǀĞƐůŝĐĞŵĞƚŚŽĚƐĂĐĐĞŶƚƵĂƚĞĚĚŝīĞƌĞŶĐĞƐďĞƚǁĞĞŶŐƌŽƵƉƐ͘ĂƐĞĚŽŶƚŚĞ ĂďŽǀĞ͕ǁĞĚĞƚĞƌŵŝŶĞĚƚŚƌĞƐŚŽůĚǀĂůƵĞƐĨŽƌĂƌƚĞƌŝĂůǁĂůůŝŶŇĂŵŵĂƟŽŶĂŶĚĨŽƵŶĚƚŚĂƚхϯϵй ŽĨƉĂƟĞŶƚƐĂƚƌŝƐŬĨŽƌĂŶĚхϲϲйǁŝƚŚŬŶŽǁŶsŚĂĚŝŶŇĂŵĞĚĂƌƚĞƌŝĂůǁĂůůƐ͕ŚŝŐŚůŝŐŚƟŶŐ ĂƉŽƚĞŶƟĂůƚŚĞƌĂƉĞƵƟĐǁŝŶĚŽǁĨŽƌĂĚĚŝƟŽŶĂůĂŶƟͲŝŶŇĂŵŵĂƚŽƌLJƐƚƌĂƚĞŐŝĞƐ͘EĞǀĞƌƚŚĞůĞƐƐ͕ ĚƵĞƚŽƚŚĞƐƵďƐƚĂŶƟĂůŽǀĞƌůĂƉďĞƚǁĞĞŶŚĞĂůƚŚLJĐŽŶƚƌŽůƐƵďũĞĐƚƐĂŶĚƉĂƟĞŶƚƐ͕ƚŚĞǀĂůƵĞŽĨ 18&Ͳ&'WdĨŽƌŝŶĚŝǀŝĚƵĂůƌŝƐŬĂƐƐĞƐƐŵĞŶƚŝƐůŝŵŝƚĞĚ͘ ϭϴ&Ͳ&'ƵƉƚĂŬĞŵĞƚƌŝĐƐ ,ĞƌĞ͕ǁĞĂƐƐĞƐƐĞĚƚŚĞŵŽƐƚĐŽŵŵŽŶůLJƌĞƉŽƌƚĞĚ18&Ͳ&'ĞŶĚƉŽŝŶƚƐ͗;ŝͿǁŚŽůĞĂƌƚĞƌLJ^hs͕;ŝŝͿ ďĂĐŬŐƌŽƵŶĚƐƵďƚƌĂĐƟŽŶ͕;ŝŝŝͿďĂĐŬŐƌŽƵŶĚƌĂƟŽ;dZͿ͕;ŝǀͿŵŽƐƚĚŝƐĞĂƐĞĚƐĞŐŵĞŶƚ͕ĂŶĚĮŶĂůůLJ ;ǀͿĂĐƟǀĞƐĞŐŵĞŶƚƐ͘dŚĞƐĞĚŝīĞƌĞŶƚĂƉƉƌŽĂĐŚĞƐŚŝŐŚůŝŐŚƚƚŚĞĂďŝůŝƚLJŽĨĂƐŝŶŐůĞWdƐĐĂŶƚŽ ŵĞĂƐƵƌĞŵƵůƟƉůĞĂƐƉĞĐƚƐŽĨƚŚĞĂƌƚĞƌLJ͛ƐŝŶŇĂŵŵĂƚŽƌLJƐƚĂƚƵƐ͘,ŽǁĞǀĞƌ͕ďLJƚŚĞƐĂŵĞƚŽŬĞŶ͕ ƚŚĞƵƐĞŽĨŵƵůƟƉůĞĞŶĚƉŽŝŶƚƐŝŶĚƌƵŐƐƚƵĚŝĞƐŝƐƐƚĂƟƐƟĐĂůůLJůĞƐƐƌŽďƵƐƚƚŚĂŶĂƐŝŶŐůĞƌĞĂĚŽƵƚ30. ƐƐŚŽǁŶŝŶdĂďůĞϮ͕ĚŝīĞƌĞŶĐĞƐŝŶďĂĐŬŐƌŽƵŶĚ18&Ͳ&'ĂĐƟǀŝƚLJďĞƚǁĞĞŶŐƌŽƵƉƐĞdžŝƐƚ͕ďƵƚ ĂƌĞŶŽƚƐŝŐŶŝĮĐĂŶƚůLJĚŝīĞƌĞŶƚ͘ŽƚŚďĂĐŬŐƌŽƵŶĚĐŽƌƌĞĐƟŽŶŵĞƚŚŽĚƐƐŚŽǁƐŵĂůůĞƌǀĂƌŝĂƟŽŶƐ ĐŽŵƉĂƌĞĚǁŝƚŚ^hs͖ŝŶƉĂƟĞŶƚƐǁŝƚŚĞƐƚĂďůŝƐŚĞĚsƚŚĞĐĂƌŽƟĚ^hsƐƚĂŶĚĂƌĚĚĞǀŝĂƟŽŶŝƐ Ϭ͘ϯϳǀĞƌƐƵƐϬ͘ϮϴͲϬ͘ϯϬĂŌĞƌďĂĐŬŐƌŽƵŶĚĐŽƌƌĞĐƟŽŶ͘ŽŶƐĞƋƵĞŶƚůLJ͕ƚŚĞƐĂŵƉůĞƐŝnjĞďĂƐĞĚŽŶ dZĂƐƌĞĂĚͲŽƵƚŝƐƐŵĂůůĞƌƚŚĂŶ^hs͘/ŶĂĚĚŝƟŽŶ͕ŝŶĚƌƵŐƐƚƵĚŝĞƐǁŝƚŚƌĞƉĞĂƚŝŵĂŐŝŶŐ͕ƚŚĞ ƵƐĞŽĨĂƌĂƟŽ͕ƐƵĐŚĂƐdZ͕ůŝŵŝƚƐƚŚĞĞīĞĐƚŽŶƐŝŐŶĂůƋƵĂŶƟĮĐĂƟŽŶǁŚĞƌĞǀĂƌŝĂƟŽŶďĞƚǁĞĞŶ ƐĐĂŶƐĞdžŝƐƚƐ;Ğ͘Ő͘ǁĞŝŐŚƚĐŚĂŶŐĞ͕18&Ͳ&'ĚŽƐĞĐŚĂŶŐĞ͕18&Ͳ&'ĐŝƌĐƵůĂƟŽŶƟŵĞĐŚĂŶŐĞͿ35. &ŽƌƚŚĞƐĞƌĞĂƐŽŶƐ͕ǁĞĨĂǀŽƌƚŚĞƵƐĞŽĨdZ͕ĂƐĂůƐŽĞŶĚŽƌƐĞĚŝŶƚŚĞƌĞĐĞŶƚEDƉŽƐŝƟŽŶ ƉĂƉĞƌŽŶǀĂƐĐƵůĂƌWdŝŵĂŐŝŶŐ35. tŝƚŚƌĞƐƉĞĐƚƚŽƚŚĞĂĐƟǀĞƐĞŐŵĞŶƚĂƉƉƌŽĂĐŚ͕ĂƐƵďƐƚĂŶƟĂůďŝĂƐŝƐŝŶĚƵĐĞĚďLJĞůŝŵŝŶĂƟŶŐ;Ă ƉŽƚĞŶƟĂůůĂƌŐĞŶƵŵďĞƌŽĨͿŝŶĐůƵĚĞĚƐƵďũĞĐƚƐĂŶĚŝŵĂŐĞĚƐůŝĐĞƐ;Ğ͘Ő͘ϰϴйŽĨŚĞĂůƚŚLJĐŽŶƚƌŽů ƐƵďũĞĐƚƐ ŝŶĐůƵĚĞĚ ŝŶ ƚŚĞ ĐĂƌŽƟĚ ĂŶĂůLJƐŝƐͿ͘ ŽŶƐĞƋƵĞŶƚůLJ͕ ƚŚĞ dZĂĐƟǀĞ ƐůŝĐĞ loses much of its ƉŽǁĞƌƚŽĚŝīĞƌĞŶƟĂƚĞďĞƚǁĞĞŶŚĞĂůƚŚLJĂŶĚĚŝƐĞĂƐĞĚƐƵďũĞĐƚƐ͘,ĞŶĐĞ͕ƚŚŝƐĂƉƉƌŽĂĐŚŵƵƐƚ ďĞŝŶƚĞƌƉƌĞƚĞĚǁŝƚŚĐĂƵƟŽŶ͕ĂŶĚŵŝŐŚƚďĞďĞƩĞƌƐƵŝƚĞĚĨŽƌĐŚĂŶŐĞƐǁŝƚŚŝŶŽŶĞŝŶĚŝǀŝĚƵĂůϭϵ͕Ϯϱ.

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/ŶŇĂŵŵĂƟŽŶŝŶǀĂƌŝŽƵƐĂƌƚĞƌŝĂůďĞĚƐ

dŚĞǀĂůŝĚĂƟŽŶŽĨ18&Ͳ&'ĂƐĂŵĂƌŬĞƌŽĨƉůĂƋƵĞŝŶŇĂŵŵĂƟŽŶŽƌŝŐŝŶĂƚĞƐĨƌŽŵŚŝƐƚŽůŽŐLJ4-6

ĂŶĚŐĞŶĞĞdžƉƌĞƐƐŝŽŶƐƚƵĚŝĞƐϯϲ͕ϯϳ͕ƉĞƌĨŽƌŵĞĚŽŶŚƵŵĂŶĐĂƌŽƟĚƉůĂƋƵĞŵĂƚĞƌŝĂů͘KǀĞƌƟŵĞ͕

ƋƵĂŶƟĮĐĂƟŽŶŽĨ18&Ͳ&'ƵƉƚĂŬĞŝŶƚŚĞĂŽƌƚĂďĞĐĂŵĞĂĚŽƉƚĞĚ͕ƐƵƉƉŽƌƚĞĚďLJ͕ĂŵŽŶŐƐƚŽƚŚĞƌ͕

the histological work in rabbit modelsϯϴ͕ϯϵ͕ĂŶĚƚŚĞŝŶĐƌĞŵĞŶƚĂůǀĂůƵĞŝŶĐĂƌĚŝŽǀĂƐĐƵůĂƌƌŝƐŬ

ƐƚƌĂƟĮĐĂƟŽŶ10͘ dŚĞ ƉƌĞƐĞŶƚ ƐƚƵĚLJ ǁĂƐ ŶŽƚ ĚĞƐŝŐŶĞĚ ƚŽ ŝŶǀĞƐƟŐĂƚĞ ƚŚĞ ŶĂƚƵƌĞ ŽĨ18&Ͳ&' ǀĂƐĐƵůĂƌ ƵƉƚĂŬĞ͕ ďƵƚ ŶĞǀĞƌƚŚĞůĞƐƐ ƐŚŽǁĞĚ ƚŚĂƚ ^hsƐ ĂŶĚ dZƐ ǁĞƌĞ ĐŽŶƐŝƐƚĞŶƚůLJ ŚŝŐŚĞƌ ŝŶƚŚĞĂŽƌƚĂĐŽŵƉĂƌĞĚǁŝƚŚƚŚĞĐĂƌŽƟĚƐ͘dŚŝƐŝƐƌĞůĞǀĂŶƚǁŚĞŶĂƉƉůLJŝŶŐĂŶ͞ŝŶĚĞdžǀĞƐƐĞů ĂƉƉƌŽĂĐŚ͟ƚŽĚƌƵŐƚƌŝĂůƐ͕ƐŝŶĐĞŝŶΕϴϬйŽĨƐƵďũĞĐƚƐ͕ƚŚĞŝŶĚĞdžǀĞƐƐĞůǁŝůůŽƌŝŐŝŶĂƚĞĨƌŽŵƚŚĞ aorta30͘dŚŝƐŵŝŐŚƚďĞƐƵďͲŽƉƟŵĂů͕ĂƐǁĞĂůƐŽĚĞŵŽŶƐƚƌĂƚĞĚƚŚĂƚĂŽƌƟĐdZĂƐƚŚĞƉƌŝŵĂƌLJ ĞŶĚƉŽŝŶƚƌĞƋƵŝƌĞƐĂůĂƌŐĞƌƐĂŵƉůĞƐŝnjĞƚŽĚĞƚĞĐƚĚƌƵŐĞĸĐĂĐLJ36͘dĂŬŝŶŐŝŶƚŽĂĐĐŽƵŶƚƚŚĂƚƚŚĞ ƉƵďůŝƐŚĞĚĚƌƵŐͲŝŶĚƵĐĞĚdZĐŚĂŶŐĞƐŚĂǀĞďĞĞŶƌĞůĂƟǀĞůLJƐŵĂůů;ƌĂŶŐŝŶŐďĞƚǁĞĞŶϱƚŽϭϱй͕ ^ƵƉƉůĞŵĞŶƚĂƌLJdĂďůĞ^ϭͿ͕ƚŚĞŽƉƟŵĂůĐŚŽŝĐĞŽĨĞŶĚƉŽŝŶƚǀĞƐƐĞůŝƐŝŵƉŽƌƚĂŶƚ͘dŚĞƵƐĞŽĨƚŚĞ ĐĂƌŽƟĚĂƌƚĞƌLJĂƐƌĞĂĚŽƵƚǀĞƐƐĞůŚŽůĚƐƚŚĞƐƚƌŽŶŐĞƐƚďŝŽůŽŐŝĐĂůǀĂůŝĚĂƟŽŶůŝŶŬŝŶŐƚŚĞ18&Ͳ&' ƐŝŐŶĂůĂŶĚŝŶŇĂŵŵĂƟŽŶƚŽƌĞĐŽŵŵĞŶĚŝƚϰͲϲ͕ϭϮ͕ϯϲ͕ϯϳ͘dŚĞƌĞĨŽƌĞ͕ǁĞƐƵŐŐĞƐƚƚŚĂƚŝĨƚŚĞŝŶĚĞdž ǀĞƐƐĞůĂƉƉƌŽĂĐŚŝƐŶŽƚƵƐĞĚ͕ƚŚĞĐĂƌŽƟĚĂƌƚĞƌLJŝƐďĞƐƚǀĂůŝĚĂƚĞĚĂƐƉƌŝŵĂƌLJƌĞĂĚŽƵƚǀĞƐƐĞů͕ ĂƐŚŝŐŚůŝŐŚƚĞĚďLJ'ŚŽůĂŵŝĞƚĂů30. dŚƌĞƐŚŽůĚƐĨŽƌĂƚŚĞƌŽƐĐůĞƌŽƟĐŝŶŇĂŵŵĂƟŽŶ WƌĞǀŝŽƵƐůLJ͕ŚŝƐƚŽůŽŐŝĐĂůĐĂƌŽƟĚƉůĂƋƵĞƐƚƵĚŝĞƐĚĞŵŽŶƐƚƌĂƚĞĚƚŚĞĐŽƌƌĞůĂƟŽŶďĞƚǁĞĞŶƉůĂƋƵĞ ƌƵƉƚƵƌĞ ĂŶĚ ŝŶŇĂŵŵĂƟŽŶ40-42͕  ŵĂĐƌŽƉŚĂŐĞͲƌŝĐŚ ĂƌĞĂƐ ŝŶ ĐĂƌŽƟĚ ƉůĂƋƵĞƐ ǁĞƌĞ ŚŝŐŚĞƌ ŝŶ ƐLJŵƉƚŽŵĂƟĐƉĂƟĞŶƚƐ;ϭϴцϭϬйͿĐŽŵƉĂƌĞĚǁŝƚŚĂƐLJŵƉƚŽŵĂƟĐƉĂƟĞŶƚƐ;ϭϭцϰйͿ41͘dĂǁĂŬŽů et al.5 ǁĞƌĞ ƚŚĞ ĮƌƐƚ ƚŽ ůŝŶŬ ƉůĂƋƵĞ ŵĂĐƌŽƉŚĂŐĞƐ Ğdž ǀŝǀŽ ƚŽ ƉůĂƋƵĞ ŝŶŇĂŵŵĂƟŽŶ in vivo͖ ĚĞŵŽŶƐƚƌĂƟŶŐĂůŝŶĞĂƌƌĞůĂƟŽŶďĞƚǁĞĞŶŵĂĐƌŽƉŚĂŐĞĐŽŶƚĞŶƚĂŶĚ18&Ͳ&'ƵƉƚĂŬĞŝŶƉůĂƋƵĞƐ ŽĨϭϳƉĂƟĞŶƚƐƐĐŚĞĚƵůĞĚĨŽƌĐĂƌŽƟĚĞŶĚĂƌƚĞƌĞĐƚŽŵLJ͘ĂƌŽƟĚƉůĂƋƵĞƐǁŝƚŚĂŵĂĐƌŽƉŚĂŐĞ ĂƌĞĂŽĨфϱйŚĂĚůŽǁdZǀĂůƵĞƐ͕ǁŚĞƌĞĂƐŝŶŇĂŵĞĚĐĂƌŽƟĚƉůĂƋƵĞƐǁŝƚŚŵĂĐƌŽƉŚĂŐĞĂƌĞĂƐ хϱйŚĂĚĐĂƌŽƟĚdZƐďĞƚǁĞĞŶϭ͘ϴϬĂŶĚϮ͘ϰϬ;Ϯϱth and 75thƉĞƌĐĞŶƟůĞƐͿ5. /ŶƐƚĞĂĚŽĨŚŝƐƚŽůŽŐLJͲďĂƐĞĚĂƉƉƌŽĂĐŚĞƐ͕ŚĞƌĞǁĞĐůĂƐƐŝĮĞĚĂƌƚĞƌŝĂůǁĂůůŝŶŇĂŵŵĂƟŽŶƵƐŝŶŐ ƉŽƉƵůĂƟŽŶͲďĂƐĞĚĚĂƚĂ͕ďLJƌĞŐĂƌĚŝŶŐƚŚĞϵϬthƉĞƌĐĞŶƟůĞŽĨ18&Ͳ&'ƵƉƚĂŬĞŵĞƚƌŝĐƐŝŶŚĞĂůƚŚLJ ĐŽŶƚƌŽůƐĂƐĂŶĂƚƵƌĂůƚŚƌĞƐŚŽůĚ͘ZĞĂƐƐƵƌŝŶŐůLJ͕ŽƵƌŚĞĂůƚŚLJĐŽŶƚƌŽůĚĂƚĂĂƌĞĐŽŶƐŝƐƚĞŶƚǁŝƚŚ 18&Ͳ&'ƵƉĂŬĞǀĂůƵĞƐƌĞƉŽƌƚĞĚŝŶƉƌŝŽƌƐƚƵĚŝĞƐϮϭ͕ϰϯͲϰϱ͘/ŶĂĚĚŝƟŽŶ͕ŽƵƌĐĂƌŽƟĚƵƉƚĂŬĞǀĂůƵĞƐ ĂƌĞ ĐŽŵƉĂƌĂďůĞ ƚŽ ƚŚŽƐĞ ƌĞƉŽƌƚĞĚ ŝŶ ŚŝƐƚŽůŽŐLJͲďĂƐĞĚϱ͕ϰϬ͕ϰϭ͕ϰϲ ĂŶĚ ĞƉŝĚĞŵŝŽůŽŐLJͲďĂƐĞĚ44 ƐƚƵĚŝĞƐ͕ĨƵƌƚŚĞƌƐƵƉƉŽƌƟŶŐŝŶƚŚĞǀĂůŝĚŝƚLJŽĨŽƵƌĚĂƚĂ͘

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