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Systolic time intervals in rheumatic mitral stenosis
T C Sharma1, S H Dave, G R Bhagat
1Department of Medicine and Cardiology, Civil Hospital, Ahmedabad.
Indian Heart Journal
|May 1, 1990
Summary
Mitral stenosis impairs left ventricular contraction, evidenced by altered systolic time intervals and reduced ejection fraction in patients. This suggests a rigid mitral complex immobilizes the ventricle, impacting cardiac function.
Area of Science:
- Cardiology
- Echocardiography
- Cardiac Physiology
Background:
- Mitral stenosis is a significant valvular heart disease.
- Understanding its impact on left ventricular function is crucial for patient management.
Purpose of the Study:
- To investigate the effects of pure mitral stenosis on left ventricular systolic function.
- To correlate echocardiographic findings with systolic time intervals.
Main Methods:
- M-Mode Echocardiography and systolic time intervals were used.
- Thirty-two patients with mitral stenosis and twenty normal subjects were studied.
Main Results:
- Increased pre-ejection period (PEP) and abbreviated left ventricular ejection time (LVET) were observed in mitral stenosis patients.
- The PEP/LVET ratio was significantly increased (0.42 vs 0.33, p<0.01).
- Left ventricular ejection fraction (EF) was significantly lower in mitral stenosis (60% vs 71.55%, p<0.01).
Conclusions:
- Mitral stenosis significantly impairs left ventricular contraction.
- A rigid mitral complex may immobilize the posterobasal left ventricle, contributing to systolic dysfunction.