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Assessment of left ventricular function during angina pectoris from the mitral valve echogram
Zeitschrift Fur Kardiologie
|June 1, 1980
Summary
The final mitral valve closing velocity significantly decreases during myocardial ischemia, indicating impaired left ventricular function. This velocity returns to normal after angina resolves, suggesting it
Area of Science:
- Cardiology
- Echocardiography
- Myocardial Ischemia
Background:
- Anterior mitral valve (aMV) motion is linked to left ventricular (LV) function.
- Quantifying aMV motion changes during myocardial ischemia is crucial for understanding cardiac dysfunction.
Purpose of the Study:
- To quantify alterations in anterior mitral valve (aMV) motion during myocardial ischemia.
- To assess the relationship between aMV motion patterns and left ventricular function during ischemic episodes.
Main Methods:
- Echocardiographic assessment of aMV motion phases (DE slope, EF slope, BC/AC slope, systolic pattern) in 12 coronary artery disease patients.
- Measurements taken at rest and during angina induced by rapid atrial pacing.
- Coronary angiography performed for patient characterization.
Main Results:
- DE slope and EF slope showed insignificant changes during angina.
- Mitral valve closing velocity (BC or AC slope) significantly reduced during angina (225.9 to 177.9 mm/sec, p < 0.01).
- Closing velocity returned to baseline post-angina and systolic mitral valve prolapse was observed in 3 patients.
Conclusions:
- Final mitral valve closing velocity is a sensitive indicator of left ventricular functional changes during early myocardial ischemia.
- Mitral valve prolapse during angina may signify papillary muscle ischemic dysfunction.