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Off-pump coronary artery bypass surgery in severe left ventricular dysfunction.

Rasoul Azarfarin1, Leili Pourafkari, Rezayat Parvizi

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Asian Cardiovascular & Thoracic Annals
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Coronary artery bypass surgery outcomes differ for patients with left ventricular dysfunction. Off-pump surgery reduced complications in these patients, but not mortality.

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Area of Science:

  • Cardiovascular Surgery
  • Cardiac Surgery Outcomes
  • Left Ventricular Dysfunction

Background:

  • Left ventricular dysfunction is a significant risk factor in coronary artery bypass surgery.
  • Understanding surgical technique impact (off-pump vs. on-pump) is crucial for patient outcomes.

Purpose of the Study:

  • To compare hospital outcomes of coronary artery bypass grafting (CABG) in patients with and without left ventricular dysfunction.
  • To evaluate the influence of surgical technique (off-pump vs. on-pump) on outcomes in these patient groups.

Main Methods:

  • Prospective data collection on 689 isolated first-time CABG patients (March 2007-March 2008).
  • Patients divided into two groups: ejection fraction <= 30% (Group 1, n=127) and >30% (Group 2, n=562).
  • Analysis of preoperative risk profiles and hospital outcomes, including off-pump vs. on-pump surgery rates.

Main Results:

  • Group 1 (ejection fraction <= 30%) had significantly higher infectious, neurologic, and cardiac complications.
  • Low ejection fraction was an independent risk factor for complications and mortality.
  • Off-pump surgery was associated with a lower rate of total complications in both groups compared to on-pump, but no significant mortality difference was observed.

Conclusions:

  • Left ventricular dysfunction independently increases morbidity and mortality risk after coronary artery bypass surgery.
  • Off-pump coronary artery bypass surgery may mitigate the increased morbidity associated with ventricular dysfunction.
  • Further research may be needed to confirm mortality benefits of off-pump surgery in this population.