Impaired coronary and retinal vasomotor function to hyperoxia in Individuals with Type 2 diabetes

Mary E. Lott, Julia E. Slocomb, Zhaohui Gao, Robert A. Gabbay, David Quillen, Thomas W. Gardner, Kerstin Bettermann

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

Purpose: Adults with diabetes are at a high risk of developing coronary heart disease. The purpose of this study was to assess coronary artery vascular function non-invasively in individuals with and without Type 2 diabetes and to compare these coronary responses to another microvascular bed (i.e. retina). We hypothesized that individuals with diabetes would have impaired coronary reactivity and that these impairments would be associated with impairments in retinal reactivity. Methods: Coronary blood velocity (Transthoracic Doppler Echocardiography) and retinal diameters (Dynamic Vessel Analyzer) were measured continuously during five minutes of breathing 100% oxygen (i.e. hyperoxia) in 15 persons with Type 2 diabetes and 15 age-matched control subjects. Using fundus photographs, retinal vascular calibers were also measured (central retinal arteriole and venule equivalents). Results: Individuals with diabetes compared to controls had impaired coronary (-2.34. ±. 16.64% vs. -14.27. ±. 10.58%, P = 0.03) and retinal (arteriole: -. 0.04. ±. 3.34% vs. -. 3.65. ±. 5.07%, P = 0.03; venule: - 1.65. ± 3.68% vs. - 5.23. ± 5.47%, P = 0.05) vasoconstrictor responses to hyperoxia, and smaller central arteriole-venule equivalent ratios (0.83. ± 0.07 vs. 0.90. ±. 0.07, P = 0.014). Coronary reactivity was associated with central retinal arteriole equivalents (r = - 0.516, P = 0.005) and retinal venular reactivity (r = 0.387, P = 0.034). Conclusion: Diabetes impairs coronary and retinal microvascular function to hyperoxia. Impaired vasoconstrictor responses may be part of a systemic diabetic vasculopathy, which may contribute to adverse cardiovascular events in individuals with diabetes.

Original languageEnglish (US)
Pages (from-to)1-7
Number of pages7
JournalMicrovascular Research
Volume101
DOIs
StatePublished - Sep 1 2015

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Hyperoxia
Arterioles
Medical problems
Type 2 Diabetes Mellitus
Venules
Vasoconstrictor Agents
Retinal Vessels
Doppler Echocardiography
Coronary Disease
Blood Vessels
Echocardiography
Retina
Coronary Vessels
Respiration
Oxygen
Blood

All Science Journal Classification (ASJC) codes

  • Biochemistry
  • Cardiology and Cardiovascular Medicine
  • Cell Biology

Cite this

@article{56bfc35fc9b6426d994925f3f96db057,
title = "Impaired coronary and retinal vasomotor function to hyperoxia in Individuals with Type 2 diabetes",
abstract = "Purpose: Adults with diabetes are at a high risk of developing coronary heart disease. The purpose of this study was to assess coronary artery vascular function non-invasively in individuals with and without Type 2 diabetes and to compare these coronary responses to another microvascular bed (i.e. retina). We hypothesized that individuals with diabetes would have impaired coronary reactivity and that these impairments would be associated with impairments in retinal reactivity. Methods: Coronary blood velocity (Transthoracic Doppler Echocardiography) and retinal diameters (Dynamic Vessel Analyzer) were measured continuously during five minutes of breathing 100{\%} oxygen (i.e. hyperoxia) in 15 persons with Type 2 diabetes and 15 age-matched control subjects. Using fundus photographs, retinal vascular calibers were also measured (central retinal arteriole and venule equivalents). Results: Individuals with diabetes compared to controls had impaired coronary (-2.34. ±. 16.64{\%} vs. -14.27. ±. 10.58{\%}, P = 0.03) and retinal (arteriole: -. 0.04. ±. 3.34{\%} vs. -. 3.65. ±. 5.07{\%}, P = 0.03; venule: - 1.65. ± 3.68{\%} vs. - 5.23. ± 5.47{\%}, P = 0.05) vasoconstrictor responses to hyperoxia, and smaller central arteriole-venule equivalent ratios (0.83. ± 0.07 vs. 0.90. ±. 0.07, P = 0.014). Coronary reactivity was associated with central retinal arteriole equivalents (r = - 0.516, P = 0.005) and retinal venular reactivity (r = 0.387, P = 0.034). Conclusion: Diabetes impairs coronary and retinal microvascular function to hyperoxia. Impaired vasoconstrictor responses may be part of a systemic diabetic vasculopathy, which may contribute to adverse cardiovascular events in individuals with diabetes.",
author = "Lott, {Mary E.} and Slocomb, {Julia E.} and Zhaohui Gao and Gabbay, {Robert A.} and David Quillen and Gardner, {Thomas W.} and Kerstin Bettermann",
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Impaired coronary and retinal vasomotor function to hyperoxia in Individuals with Type 2 diabetes. / Lott, Mary E.; Slocomb, Julia E.; Gao, Zhaohui; Gabbay, Robert A.; Quillen, David; Gardner, Thomas W.; Bettermann, Kerstin.

In: Microvascular Research, Vol. 101, 01.09.2015, p. 1-7.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Impaired coronary and retinal vasomotor function to hyperoxia in Individuals with Type 2 diabetes

AU - Lott, Mary E.

AU - Slocomb, Julia E.

AU - Gao, Zhaohui

AU - Gabbay, Robert A.

AU - Quillen, David

AU - Gardner, Thomas W.

AU - Bettermann, Kerstin

PY - 2015/9/1

Y1 - 2015/9/1

N2 - Purpose: Adults with diabetes are at a high risk of developing coronary heart disease. The purpose of this study was to assess coronary artery vascular function non-invasively in individuals with and without Type 2 diabetes and to compare these coronary responses to another microvascular bed (i.e. retina). We hypothesized that individuals with diabetes would have impaired coronary reactivity and that these impairments would be associated with impairments in retinal reactivity. Methods: Coronary blood velocity (Transthoracic Doppler Echocardiography) and retinal diameters (Dynamic Vessel Analyzer) were measured continuously during five minutes of breathing 100% oxygen (i.e. hyperoxia) in 15 persons with Type 2 diabetes and 15 age-matched control subjects. Using fundus photographs, retinal vascular calibers were also measured (central retinal arteriole and venule equivalents). Results: Individuals with diabetes compared to controls had impaired coronary (-2.34. ±. 16.64% vs. -14.27. ±. 10.58%, P = 0.03) and retinal (arteriole: -. 0.04. ±. 3.34% vs. -. 3.65. ±. 5.07%, P = 0.03; venule: - 1.65. ± 3.68% vs. - 5.23. ± 5.47%, P = 0.05) vasoconstrictor responses to hyperoxia, and smaller central arteriole-venule equivalent ratios (0.83. ± 0.07 vs. 0.90. ±. 0.07, P = 0.014). Coronary reactivity was associated with central retinal arteriole equivalents (r = - 0.516, P = 0.005) and retinal venular reactivity (r = 0.387, P = 0.034). Conclusion: Diabetes impairs coronary and retinal microvascular function to hyperoxia. Impaired vasoconstrictor responses may be part of a systemic diabetic vasculopathy, which may contribute to adverse cardiovascular events in individuals with diabetes.

AB - Purpose: Adults with diabetes are at a high risk of developing coronary heart disease. The purpose of this study was to assess coronary artery vascular function non-invasively in individuals with and without Type 2 diabetes and to compare these coronary responses to another microvascular bed (i.e. retina). We hypothesized that individuals with diabetes would have impaired coronary reactivity and that these impairments would be associated with impairments in retinal reactivity. Methods: Coronary blood velocity (Transthoracic Doppler Echocardiography) and retinal diameters (Dynamic Vessel Analyzer) were measured continuously during five minutes of breathing 100% oxygen (i.e. hyperoxia) in 15 persons with Type 2 diabetes and 15 age-matched control subjects. Using fundus photographs, retinal vascular calibers were also measured (central retinal arteriole and venule equivalents). Results: Individuals with diabetes compared to controls had impaired coronary (-2.34. ±. 16.64% vs. -14.27. ±. 10.58%, P = 0.03) and retinal (arteriole: -. 0.04. ±. 3.34% vs. -. 3.65. ±. 5.07%, P = 0.03; venule: - 1.65. ± 3.68% vs. - 5.23. ± 5.47%, P = 0.05) vasoconstrictor responses to hyperoxia, and smaller central arteriole-venule equivalent ratios (0.83. ± 0.07 vs. 0.90. ±. 0.07, P = 0.014). Coronary reactivity was associated with central retinal arteriole equivalents (r = - 0.516, P = 0.005) and retinal venular reactivity (r = 0.387, P = 0.034). Conclusion: Diabetes impairs coronary and retinal microvascular function to hyperoxia. Impaired vasoconstrictor responses may be part of a systemic diabetic vasculopathy, which may contribute to adverse cardiovascular events in individuals with diabetes.

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