Related Experiment Videos
Endothelial dysfunction in patients with coronary artery disease: a comparison of three frequently reported tests
Stefan H J Monnink1, Paul L van Haelst, Ad J van Boven
1Department of Cardiology, Thoraxcenter, University Hospital Groningen, The Netherlands.
Insights
Forearm vasoreactivity tests can predict coronary endothelial function in patients with mild dysfunction when using the same stimulus. This finding aids in assessing cardiovascular disease risk.
Area of Science:
- Cardiovascular Research
- Vascular Biology
- Diagnostic Medicine
Background:
- Endothelial dysfunction is a key predictor of cardiovascular disease.
- Current endothelial function tests include coronary diameter response, forearm blood flow (FBF), and flow-mediated dilation (FMD).
- Comparing these common tests is crucial for accurate assessment.
Purpose of the Study:
- To compare three frequently used endothelial function tests.
- To evaluate the relationship between coronary and forearm vascular responses.
- To determine the predictive value of forearm tests for coronary endothelial function.
Main Methods:
- Twenty-eight patients undergoing coronary angiography were studied.
- Endothelial function was measured in the coronary artery and forearm using FBF and FMD.
- Acetylcholine and postischemic hyperemia were used as stimuli.
Main Results:
- Acetylcholine reduced coronary diameter by 7.4% and increased FBF by 230%.
- Hyperemia increased brachial diameter by 6.7%.
- Forearm vascular response to acetylcholine correlated with coronary response (P=0.039), but FMD did not relate to FBF or coronary response.
Conclusions:
- Forearm vasoreactivity is linked to coronary response in mild endothelial dysfunction when using identical stimuli.
- This suggests forearm tests can be valuable indicators of coronary endothelial health.
- Further research may refine the use of forearm tests for cardiovascular risk assessment.
Background:
Endothelial dysfunction is useful in predicting future cardiovascular disease. At present several tests are available to test endothelial function: coronary diameter response to acetylcholine, forearm bloodflow (FBF) response to acetylcholine, and brachial artery flow-mediated dilative (FMD) response to postischemic hyperemia. This study aimed to compare the three most frequently reported endothelial function tests.
Methods:
Twenty-eight patients (19 males and nine females, mean age 57 years) referred for diagnostic coronary angiography were considered for endothelial function measurement in the coronary artery as well as in the forearm by FBF and FMD.
Results:
Acetylcholine decreased the mean coronary diameter by 7.4% (SD 6.3%) and increased the mean FBF by 230% (SD 152%). Hyperemia increased the mean brachial diameter by 6.7% (SD 4.8%). The effect of acetylcholine on forearm resistance vessels was significantly related to the effect of acetylcholine on the coronary conduit vessels (P=0.039). Nonetheless, FMD was not related to FBF nor to the coronary response.
Conclusion:
In patients with mild coronary endothelial dysfunction, forearm vasoreactivity is related to the coronary response, provided that the same stimulus is used.