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Left ventricular dysfunction versus paravalvular leak in patients with mitral disc prostheses.
Acta Cardiologica
|January 1, 1986
Summary
This study shows that a combined echo-phonocardiographic technique can differentiate paravalvular leak (PL) from left ventricular failure (LVF) in patients with prosthetic mitral valves. These findings aid in selecting appropriate medical or surgical treatments.
Area of Science:
- Cardiology
- Biomedical Engineering
- Medical Diagnostics
Background:
- Hemodynamic deterioration after mitral valve replacement often stems from left ventricular dysfunction (LVF) or prosthesis malfunction, such as paravalvular leak (PL).
- Accurate differentiation between these conditions is crucial for guiding patient management towards optimal medical or surgical interventions.
Purpose of the Study:
- To evaluate the efficacy of a combined echo-phonocardiographic technique in distinguishing between paravalvular leak and left ventricular failure in patients with mitral disc prostheses.
- To identify specific echocardiographic and phonocardiographic parameters that can reliably differentiate these two critical complications.
Main Methods:
- A comparative study involving two groups of patients: five with surgically or pathologically verified paravalvular leak (PL) and nine with left ventricular failure (LVF) and normally functioning prostheses.
- Analysis of left ventricular diastolic diameter, presence of a protodiastolic hump, variability of the A2-mitral valve opening interval (delta A2-MVO), and the A2-maximal left ventricular posterior wall interval (A2-PW).
Main Results:
- Left ventricular diastolic diameter was significantly larger in the LVF group compared to the PL group.
- A protodiastolic hump was observed in four patients with PL.
- Delta A2-MVO was less than 30 msec in the LVF group and greater than 30 msec in the PL group.
- A2-PW exceeded 60 msec in the PL group and was shorter than 60 msec in the LVF group.
Conclusions:
- The combined echo-phonocardiographic technique, particularly utilizing the delta A2-MVO and A2-PW parameters, demonstrates significant utility in differentiating paravalvular leak from left ventricular failure.
- This non-invasive method can aid clinicians in making timely and accurate diagnostic decisions for patients with prosthetic mitral valves experiencing hemodynamic compromise.