Coronary artery bypass surgery in patients with severe left-ventricular dysfunction

Area of Science:

• Cardiology
• Cardiac Surgery
• Cardiovascular Research

Background:

• Patients with depressed left ventricular function due to ischemic heart disease often have limited treatment options.
• Significant stenoses in major coronary arteries necessitate interventions to restore myocardial perfusion.
• Pre-existing conditions like previous myocardial infarctions can further compromise cardiac function.

Purpose of the Study:

• To evaluate the efficacy of coronary arterial bypass surgery in patients with poor left-ventricular function.
• To assess the impact of bypass surgery on left-ventricular ejection fraction and patient's working capacity.
• To determine the perioperative mortality and long-term survival rates.

Main Methods:

• A cohort of 31 patients with ischemic heart disease and reduced left-ventricular ejection fraction (mean 20%) underwent coronary arterial bypass surgery.
• Patients had significant coronary artery stenoses and varying histories of myocardial infarction.
• Echocardiography was used for pre- and post-operative assessment of left-ventricular ejection fraction (LVEF).

Main Results:

• The perioperative mortality rate was 9.7%, with a 1-year survival rate of 90%.
• Postoperative median LVEF significantly increased from 20% to 35%.
• Working capacity improved in 71% of the patients following surgery.

Conclusions:

• Coronary arterial bypass surgery can lead to significant symptomatic and functional improvement in patients with ischemic heart disease and impaired left-ventricular function.
• The procedure is associated with acceptable perioperative risks and favorable long-term survival.
• Bypass surgery effectively addresses perfusion defects contributing to poor cardiac function.