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ECG predictors of coronary anatomy and left ventricular function. Findings in patients with typical angina pectoris
Insights
Resting electrocardiograms (ECGs) can predict left ventricular (LV) function in patients with angina. While ECG abnormalities correlate with coronary artery disease extent, they better reflect LV function decline.
Area of Science:
- Cardiology
- Diagnostic Imaging
- Clinical Medicine
Background:
- Typical angina pectoris poses a significant diagnostic challenge.
- Resting electrocardiograms (ECGs) are a common, non-invasive diagnostic tool.
- Left ventricular (LV) function is a critical determinant of cardiac health.
Purpose of the Study:
- To evaluate the predictive value of resting ECG findings for coronary artery disease (CAD) extent.
- To assess the correlation between resting ECG patterns and left ventricular (LV) function.
- To determine if ECG can predict disease severity and LV performance in angina patients.
Main Methods:
- Retrospective analysis of 90 patients with typical angina pectoris.
- Independent review of resting ECGs and cardiac catheterization data.
- Patients categorized into three ECG groups: normal, ST-T abnormalities, and Q wave infarction.
Main Results:
- Increasing ECG abnormality correlated with a higher prevalence of triple vessel disease (30% to 66%).
- Significant depression in ejection fraction (mean 65% to 51%) was observed with worsening ECG changes.
- Resting ECG showed a stronger correlation with LV function than with the extent of coronary artery disease.
Conclusions:
- Resting ECG findings are valuable in assessing LV function in angina patients.
- While ECG changes indicate disease progression, their predictive power for LV function is more pronounced.
- ECG can serve as a useful non-invasive marker for evaluating cardiac status in typical angina.
Abstract:
In 90 patients with typical angina pectoris, resting ECGs and cardiac catheterization findings were independently reviewed to determine whether ECG findings could be used to predict the extent of disease and the state of the left ventricular (LV) function. Thirty consecutive patients in each of three ECG groups were studied: group 1, normal ECG: group 2, ST-T abnormalities; and group 3, Q wave infarction pattern. Triple vessel disease was present in 30 percent, 40 percent, and 66 percent of patients in groups 1, 2, and 3, respectively. The ejection fraction (percent) (mean +/- SD) was 65 +/- 12, 64 +/- 11, and 51 +/- 16 in groups 1, 2, and 3, respectively. With increasing ECG abnormality (group 1 to group 3), there was a tendency to both more extensive coronary disease and greater depression of left ventricular function. However, the resting ECG appeared to correlate bettter with the state of the LV function than with the extent of the coronary artery disease.