Related Experiment Video
Updated: Jun 10, 2025
Assessing Endothelial Vasodilator Function with the Endo-PAT 2000
Published on: October 15, 2010
Assessment of coronary endothelial dysfunction using contemporary coronary function testing
Elize A M de Jong1, Hanae F Namba2, Coen K M Boerhout2
1Amsterdam UMC, Heart Centre, Department of Cardiology, Amsterdam Cardiovascular Sciences, Amsterdam, the Netherlands; UMC Utrecht, Department of Cardiology, Utrecht, the Netherlands.
Insights
Diagnosing coronary endothelial dysfunction (CED) requires both epicardial diameter and coronary blood flow (CBF) measurements. Relying on a single parameter misses significant cases, highlighting the need for combined assessment in coronary function testing (CFT).
Area of Science:
- Cardiology
- Vascular Biology
- Diagnostic Imaging
Background:
- Coronary endothelial dysfunction (CED) is traditionally diagnosed using low-dose acetylcholine during coronary function testing (CFT).
- Current criteria involve assessing epicardial vasodilation and coronary blood flow (CBF) changes.
- Accurate diagnosis is crucial for managing patients with angina and non-obstructive coronary arteries.
Purpose of the Study:
- To evaluate the diagnostic utility of using angiographic epicardial vasomotion and CBF as independent criteria for CED diagnosis during CFT.
- To determine if single parameters can effectively replace combined assessments in diagnosing CED.
Main Methods:
- A study included 110 patients with angina and non-obstructive coronary arteries undergoing CFT.
- CED was defined by quantitative coronary angiography showing reduced epicardial diameter and/or <50% increase in CBF post-acetylcholine.
- Analysis compared diagnoses based on current criteria versus using epicardial diameter or CBF alone.
Main Results:
- Using current criteria, 78% of patients were diagnosed with CED.
- Relying solely on epicardial diameter missed 24% of CED cases, while CBF alone missed 27%.
- Both parameters showed similar, insufficient diagnostic yield when used independently (OR: 0.913).
Conclusions:
- Neither epicardial diameter nor CBF alone is sufficient for accurately diagnosing CED.
- Combining both epicardial vasomotion and CBF assessments is essential for a comprehensive diagnosis of CED.
- Using single parameters risks missing diagnoses, particularly microvascular or epicardial CED.
Background:
The established diagnosis of coronary endothelial dysfunction (CED) is through the response to low-dose acetylcholine during invasive coronary function testing (CFT). Current diagnostic criteria encompass deficient epicardial vasodilation and/or insufficient increase in coronary blood flow (CBF) calculated from additional Doppler flow velocity measurements. The aim is to evaluate the diagnostic yield of using angiographic epicardial vasomotion and CBF as single criteria for diagnosing CED during CFT.
Methods:
A total of 110 patients with angina and non-obstructive coronary arteries who underwent clinically indicated CFT were included. CED was defined as any reduction in epicardial diameter through quantitative coronary angiography and/or < 50 % increase in CBF compared to baseline after low-dose acetylcholine.
Results:
Based on current diagnostic criteria, 78 % of patients (N = 86/110) was diagnosed with CED. When only considering epicardial diameter, 24 % CED (N = 21/86) and 50 % severe CED diagnoses (N = 19/38) were missed. When only considering CBF, 27 % CED (N = 23/86) and 18 % severe CED diagnoses (N = 7/38) were missed. A similar diagnostic yield for CED detection was found for both parameters (OR: 0.913, 95 %CI 0.481-1.726, p = 0.763). The incidence of CFT diagnoses was comparable among all groups.
Conclusions:
As single parameters, both epicardial diameter and CBF were ineffective in accurately diagnosing CED compared to the current diagnostic criteria. Combining both parameters is necessary to diagnose the complete spectrum of CED, as missed diagnoses of deficient CBF responses (e.g., microvascular CED) and epicardial vasomotion (e.g., epicardial CED) might occur when relying on these parameters as single diagnostic criteria for CED.
More Related Videos
Related Concept Videos
01:30Acute Coronary Syndrome III: Diagnostic studies
01:26Exercise Stress Test
Exercise stress testing, commonly known as a treadmill test, is a noninvasive procedure used to evaluate cardiovascular function and diagnose heart conditions.
Definition
An exercise stress test measures the heart's response to exertion using a treadmill or stationary bicycle. Chest electrodes record the heart's electrical activity through an ECG, and blood pressure is monitored regularly.
Purposes
01:27Coronary Artery Disease V: Surgical Management
01:30Coronary Artery Disease I: Introduction
01:25Imaging Studies for Cardiovascular System VI: Calcium -Scoring CT
01:28Imaging Studies for Cardiovascular System V: CT