[Mitral valve replacement in patients with obstructive hypertrophic cardiomyopathy]

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A V Lysenko1, G I Salagaev1, P V Lednev1

  • 1Petrovsky National Research Center of Surgery, Moscow, Russia.

Khirurgiia
|November 2, 2023
PubMed

Insights

Mitral valve replacement is sometimes necessary after septal myectomy for obstructive hypertrophic cardiomyopathy (HCM) if severe mitral insufficiency persists. This involuntary strategy addresses high left ventricular outflow tract pressure gradients.

Area of Science:

  • Cardiovascular Surgery
  • Cardiology
  • Cardiac Valve Disease

Context:

  • Obstructive hypertrophic cardiomyopathy (HCM) often involves severe mitral valve insufficiency.
  • Surgical intervention aims to relieve left ventricular outflow tract (LVOT) obstruction and address mitral valve issues.
  • Chronic heart failure (NYHA class III) is a common presentation in these patients.

Purpose:

  • To determine the incidence and etiological factors of mitral valve replacement (MVR) in patients with obstructive HCM.
  • To analyze outcomes of surgical correction for LVOT obstruction and mitral valve repair.

Summary:

  • A study of 172 patients with obstructive HCM and severe mitral insufficiency found that 12 (7.0%) required mitral valve replacement.
  • In 5 cases, MVR was primary due to organic mitral valve lesions; in 7 cases, it was necessitated by ineffective septal myectomy.
  • Successful surgical correction of LVOT obstruction and mitral valve repair was achieved in 93.0% of patients.

Impact:

  • Mitral valve replacement emerges as an involuntary but necessary strategy when septal myectomy is ineffective in resolving severe mitral insufficiency and high LVOT pressure gradients.
  • Findings inform surgical decision-making for complex HCM cases requiring combined LVOT decompression and mitral valve intervention.
Abstract

Keywords:
left ventricular outflow tractmitral insufficiencymitral valve replacementobstructive hypertrophic cardiomyopathy

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