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[Papillary muscle rupture in myocardial infarction]
R Zalaquett1, S Morán, M J Irarrázaval
1Depto de enfermedades Cardiovasculares, Facultad de Medicina, P Universidad Católica de Chile, Santiago de Chile.
Revista Medica De Chile
|February 1, 1995
Summary
Mitral valve replacement for papillary muscle rupture after heart attack offers satisfactory long-term outcomes despite high initial risks. This surgical intervention addresses acute mitral regurgitation, improving patient survival and function.
Area of Science:
- Cardiovascular Surgery
- Interventional Cardiology
- Cardiac Pathology
Context:
- Acute mitral regurgitation (AMR) is a critical complication following myocardial infarction.
- Papillary muscle rupture, particularly posterior, leads to severe hemodynamic compromise.
- Patients present in critical condition with pulmonary edema, necessitating urgent surgical intervention.
Purpose:
- To evaluate the surgical outcomes of mitral valve replacement (MVR) in patients with post-infarction papillary muscle rupture.
- To assess the long-term efficacy and survival rates following MVR for this specific complication.
Summary:
- Nine patients with AMR due to papillary muscle rupture underwent surgery between 1980-1992.
- Seven patients had posterior papillary muscle rupture; all were critically ill.
- Eight patients received MVR (4 mechanical prostheses), one had valve repair with reimplantation. Six also underwent myocardial revascularization.
- Operative mortality was 22% (2/9), with 4 postoperative complications. Survivors (7/9) showed good long-term functional class (I-II) over 6-115 months, though one died from heart failure at 6 months.
Impact:
- Despite high operative mortality and morbidity, mitral valve replacement for papillary muscle rupture demonstrates satisfactory long-term results.
- This study highlights the viability of surgical intervention for a life-threatening complication of myocardial infarction.
- Successful long-term outcomes suggest MVR is a crucial treatment option for selected patients with post-infarction papillary muscle rupture.