[Function improvement in levography following aortocoronary bypass].

Area of Science:

• Cardiology
• Cardiac Surgery
• Myocardial Ischemia

Background:

• Coronary artery disease (CAD) can lead to severe left ventricular dysfunction.
• Myocardial ischemia may impair cardiac function even without overt angina pectoris.
• The reversibility of myocardial dysfunction is key to surgical outcomes.

Purpose of the Study:

• To investigate the potential for functional recovery of akinetic myocardial segments after aortocoronary bypass surgery.
• To identify clinical predictors of improved cardiac function post-surgery in CAD patients.
• To evaluate the efficacy of coronary artery surgery in patients with severe left ventricular dysfunction due to ischemia.

Main Methods:

• Prospective evaluation of 63 patients 6-12 months post-aortocoronary surgery using coronary angiography.
• Assessment of left ventricular ejection fraction (LVEF) pre- and post-surgery.
• Analysis of clinical parameters including angina pectoris and electrocardiogram (ECG) findings.

Main Results:

• Actively contracting segments were observed in 8 of 63 patients (12.7%) with previously akinetic areas.
• Mean ejection fraction significantly increased from 48.1% to 68.3% post-surgery.
• Preoperative predictors included rest angina and a discrepancy between severe ventriculographic and mild ECG findings.

Conclusions:

• Severe left ventricular dysfunction in CAD is not an absolute contraindication for coronary artery surgery if ischemia is reversible.
• Myocardial function can improve significantly post-surgery, even in patients with minimal angina.
• Coronary artery surgery is effective in restoring function to ischemic but viable myocardium.