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[The reduction of the ST segment during ergometry is not useful for the location of coronary stenosis]
J C García Rubira1, J J Gómez Barrado, R Hidalgo Urbano
1Unidad Coronaria, Hospital Universitario Virgen Macarena, Sevilla.
Insights
ST-segment depression during exercise stress tests has limited value for pinpointing coronary artery stenoses. While anterior leads showed some correlation, lateral leads were more accurate for detecting coronary artery disease.
Area of Science:
- Cardiology
- Exercise Physiology
Context:
- Exercise stress testing is a common diagnostic tool for coronary artery disease.
- Interpreting ST-segment changes during stress tests is crucial for localization of coronary stenoses.
Purpose:
- To evaluate the diagnostic accuracy of ST-segment depression during exercise stress testing for localizing coronary stenoses.
Summary:
- A study of 44 patients found significant ST-segment depression during exercise stress tests.
- Maximal ST-segment depression in anterior leads (V1-V4) showed a correlation with left anterior descending artery stenosis (r = 0.402, p = 0.0067), with 59% accuracy.
- Low lateral leads (V5, V6) demonstrated higher accuracy in detecting coronary artery disease across different vessels.
Impact:
- The findings suggest that ST-segment depressions during exercise stress tests have limited utility in precisely localizing coronary stenoses.
- This highlights the need for complementary diagnostic methods for accurate coronary artery disease assessment.
Abstract:
We have analyzed 44 consecutive patients with significant ST-segment depression during the exercise stress test, with the aim of testing the ability of localizing the coronary stenoses. There was a significant correlation only between maximal ST-segment depression in V1-V4 and stenosis in the left anterior descending artery (r = 0.402, p = 0.0067), but the accuracy of the presence of ischemic ST depression in anterior leads to detect disease of the left anterior descending artery was 59% (26 correct, 18 wrong). The low lateral leads (V5 and V6) were the more accurate to detect coronary disease, as much for the left anterior descending artery as for the right or the circumflex coronary arteries. We conclude that ST segment depressions are of little value to localize the coronary stenoses.