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Semi-Minimal Invasive Method to Induce Myocardial Infarction in Rats and the Assessment of Cardiac Function by an Isolated Working Heart System
08:01

Semi-Minimal Invasive Method to Induce Myocardial Infarction in Rats and the Assessment of Cardiac Function by an Isolated Working Heart System

Published on: June 11, 2020

[Myocardial revascularization and mitral insufficiency correction in case of acute myocardial infarction]

Juozas Sakalauskas1, Sarūnas Kinduris

  • 1Clinic of Cardiosurgery, Heart Center, Kaunas University of Medicine, Institute for Biomedical Research, Lithuania. Sakalauskas_J@hotmail.com

Medicina (Kaunas, Lithuania)
|April 14, 2004
PubMed

Insights

Surgical repair of ischemic mitral insufficiency combined with coronary artery bypass grafting improves cardiac function in acute myocardial infarction patients. Early results indicate positive outcomes when performed around the third day post-infarction.

Area of Science:

  • Cardiovascular Surgery
  • Interventional Cardiology
  • Cardiac Rehabilitation

Background:

  • Acute myocardial infarction (AMI) frequently leads to ischemic mitral insufficiency (IMI).
  • IMI exacerbates left ventricular dysfunction and worsens patient prognosis.
  • Surgical intervention aims to improve survival and functional status in these high-risk patients.

Purpose of the Study:

  • To evaluate patient survival and functional status changes after combined coronary artery bypass grafting (CABG) and mitral valve repair (MVR) in the acute phase of myocardial infarction.
  • To assess the efficacy of specific mitral valve repair techniques for IMI.

Main Methods:

  • Retrospective analysis of 82 patients undergoing surgery between 1 and 21 days post-AMI.
  • 64 patients had CABG alone, while 18 underwent combined CABG and MVR.
  • Pre- and post-operative assessment included Doppler-echocardiography and transesophageal echocardiography.

Main Results:

  • Combined CABG and MVR significantly reduced mitral valve ring diameter and the degree of mitral incompetence.
  • Left ventricular end-diastolic diameter decreased, and left ventricular ejection fraction improved post-operatively.
  • Annulocompression, with or without papillary muscle shortening, was the primary MVR technique.

Conclusions:

  • Patients with acute myocardial infarction and significant mitral valve incompetence benefit from combined CABG and mitral valve repair.
  • Annulocompression techniques are effective for repairing ischemic mitral incompetence.
  • Early surgical intervention (around day 3) yields results comparable to those in stable ischemic heart disease patients.
Abstract

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