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Valve replacement for chronic mitral insufficiency; long-term follow up using technetium pertechnetate scintigraphy
The International Journal of Artificial Organs
|May 1, 1982
Summary
Technetium Pertechnetate Scintigraphy shows normal heart volumes and ejection fraction after mitral valve replacement. This nuclear medicine technique effectively assesses cardiac function post-surgery.
Area of Science:
- Cardiology
- Nuclear Medicine
- Cardiovascular Surgery
Background:
- Chronic mitral insufficiency often requires valve replacement surgery.
- Preoperative assessment revealed significant left ventricular volumes and regurgitation.
- Ejection fraction was normal preoperatively, indicating preserved systolic function.
Purpose of the Study:
- To evaluate cardiac function after mitral valve replacement using Technetium Pertechnetate Scintigraphy.
- To assess left ventricular volumes and ejection fraction at rest and during exercise post-surgery.
Main Methods:
- Technetium Pertechnetate Scintigraphy was performed on 12 patients post-mitral valve replacement.
- A first-pass radionuclide technique with a fast multicrystal camera was utilized.
- Left ventricular volumes were calculated using normalized total count rate.
Main Results:
- Postoperative end-diastolic and end-systolic volumes were normal at rest and during exercise.
- Ejection fraction increased physiologically with exercise, from 57.7% to 69.7%.
- The study demonstrated preserved cardiac function 19.8 months after valve replacement.
Conclusions:
- Technetium Pertechnetate Scintigraphy is a valuable tool for assessing cardiac function after mitral valve replacement.
- The procedure confirms normalization of left ventricular volumes and appropriate systolic function response to exercise post-surgery.