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Noninvasive diagnostic evaluation of the normal Beall mitral prosthesis
Catheterization and Cardiovascular Diagnosis
|January 1, 1976
Summary
This study assessed Beall disc mitral valve prosthesis function using phonocardiography and echocardiography. Results showed normal valve function in most patients, with one case suggesting abnormal poppet movement.
Area of Science:
- Cardiovascular Medicine
- Biomedical Engineering
Background:
- The Beall disc mitral valve prosthesis is a mechanical heart valve used to treat mitral valve disease.
- Assessing the functional integrity of prosthetic heart valves is crucial for patient outcomes.
Purpose of the Study:
- To evaluate the phonocardiographic and echocardiographic characteristics of normally functioning Beall disc mitral valve prostheses.
- To identify potential indicators of abnormal poppet motion in these prostheses.
Main Methods:
- Phonocardiography was used to measure intervals like Q-S1 and A2-OC.
- Echocardiography was employed to assess disc velocities, including opening and closing speeds.
- Twenty patients with Beall disc mitral valve prostheses were examined.
Main Results:
- Normal phonocardiographic intervals (Q-S1: 67±3 ms, A2-OC: 118±8 ms) and disc velocities (opening: 296±30 mm/s, closing: 414±44 mm/s) were observed.
- Maximal variations in intervals and velocities were quantified.
- One patient exhibited unusual prolongation and variability in the A2-OC interval, raising suspicion of abnormal poppet function.
Conclusions:
- Phonocardiography and echocardiography provide valuable data for assessing Beall disc mitral valve prosthesis function.
- The A2-OC interval's prolongation and variability may indicate abnormal poppet motion.
- Further investigation is warranted for patients with atypical phonocardiographic findings.