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Ventricular reconstruction for ischemic cardiomyopathy

Lynda L Mickleborough1, Naeem Merchant, Yves Provost

  • 1Division of Cardiovascular Surgery, Toronto General Hospital, University of Toronto, Toronto, Ontario, Canada. lynda.mickleborough@uhn.on.ca

The Annals of Thoracic Surgery
|June 25, 2003
PubMed

Insights

Left ventricular reconstruction improves heart function in patients with coronary artery disease and poor ejection fraction. This surgical approach offers significant survival benefits and reduced symptoms for selected individuals.

Area of Science:

  • Cardiology
  • Cardiac Surgery
  • Heart Failure Pathophysiology

Background:

  • Ischemic cardiomyopathy, resulting from coronary artery disease and myocardial infarction, often leads to poor left ventricular function.
  • Akinetic or dyskinetic nonfunctioning portions of the left ventricle contribute to reduced cardiac output and heart failure symptoms.
  • Ventricular arrhythmias are common and prognostically significant in patients with ischemic cardiomyopathy.

Purpose of the Study:

  • To review the pathophysiology of ischemic cardiomyopathy.
  • To establish guidelines for patient selection and preoperative assessment for left ventricular reconstruction.
  • To describe the surgical technique and evaluate the outcomes of left ventricular reconstruction, including adjunctive arrhythmia ablation.

Main Methods:

  • Surgical resection or exclusion of akinetic/dyskinetic ventricular segments.
  • Restoration of normal left ventricular size and shape.
  • Visually directed ablation for ventricular arrhythmias in cases of significant septal scarring.

Main Results:

  • Significant reduction in left ventricular volume.
  • Increase in ejection fraction and improvement in apical geometry.
  • Low operative mortality with 5-year survival of 84% and freedom from sudden death of 96%.

Conclusions:

  • Left ventricular reconstruction is a safe and effective procedure for selected patients with ischemic cardiomyopathy.
  • The surgery leads to significant improvements in left ventricular function, reduced symptoms, and enhanced long-term survival.
  • Ventricular reconstruction should be considered for patients with coronary artery disease and akinetic or dyskinetic scar.

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