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Changes in left ventricular systolic performance immediately after percutaneous aortic balloon valvuloplasty
D H Harpole1, C J Davidson, T N Skelton
1Department of Medicine, Duke University Medical Center, Durham, North Carolina 27710.
The American Journal of Cardiology
|May 15, 1990
Summary
Percutaneous aortic valvuloplasty improved aortic valve function and reduced outflow obstruction. Left ventricular (LV) performance showed complex changes, including increased ejection fraction and decreased filling pressures, maintaining cardiac output.
Area of Science:
- Cardiology
- Cardiovascular Physiology
- Interventional Cardiology
Background:
- Aortic stenosis is a significant cause of left ventricular (LV) outflow obstruction.
- Percutaneous aortic valvuloplasty (PAV) is a treatment option for aortic stenosis.
- Understanding acute hemodynamic changes post-PAV is crucial for patient management.
Purpose of the Study:
- To assess immediate alterations in LV performance following PAV.
- To correlate hemodynamic changes with procedural success.
Main Methods:
- Twenty-five patients undergoing PAV were studied.
- First-pass radionuclide angiocardiography was used for pressure-volume loop analysis.
- High-fidelity micromanometry recorded LV and aortic pressures; echocardiography assessed wall stress.
Main Results:
- PAV significantly reduced aortic valve gradients and increased valve area.
- End-systolic wall stress and LV ejection fraction improved.
- LV end-diastolic volume and pressure decreased, with preserved cardiac output.
- No significant changes in peak positive LV dP/dt or end-systolic pressure-volume ratio were observed.
Conclusions:
- PAV effectively reduces LV outflow obstruction.
- Acute hemodynamic effects include improved LV contractility and reduced filling pressures.
- Cardiac output is maintained despite decreased LV filling post-PAV.