Functional outcome after myocardial revascularization in ischemic left ventricular failure

Area of Science:

• Cardiology
• Cardiac Surgery
• Heart Failure Management

Background:

• Severe left ventricular failure (LVEF < 30%) presents a challenge in cardiac surgery.
• Coronary artery bypass grafting (CABG) offers survival rates comparable to heart transplantation in these patients.
• Functional outcomes after CABG in patients with severely reduced ejection fraction require detailed assessment.

Purpose of the Study:

• To evaluate the clinical results and functional outcomes of CABG in patients with LVEF < 30%.
• To compare outcomes between patients presenting with angina versus congestive heart failure.

Main Methods:

• Retrospective review of 101 consecutive patients undergoing CABG between 1/91 and 1/97.
• Stratification into two groups: 65 patients with angina (Group 1) and 36 with congestive heart failure (Group 2).
• Analysis of perioperative data, survival rates, and symptom-free survival during a mean follow-up of 29 months.

Main Results:

• Low perioperative mortality (1%) and comparable baseline characteristics between groups.
• Actuarial survival at 5 years was 74% for Group 1 and 78% for Group 2 (p=ns).
• Symptom-free survival at 5 years was significantly lower in the congestive heart failure group (28%) compared to the angina group (49%) (p=0.05), despite improvements in LVEF and functional class.

Conclusions:

• CABG improves survival in patients with ischemic left ventricular failure.
• Patients with congestive heart failure as the primary presentation experience unsatisfactory symptom-free survival post-CABG.
• Further studies are needed to define optimal treatment strategies (revascularization vs. transplantation) for this specific patient subgroup.