Heart failure after myocardial revascularization: risk markers

Area of Science:

• Cardiology
• Cardiac Surgery
• Heart Failure Research

Background:

• Patients undergoing Coronary Artery Bypass Grafting (CABG) are at risk for developing heart failure post-surgery.
• Accurate risk stratification is crucial for identifying patients susceptible to heart failure after CABG.

Purpose of the Study:

• To investigate the prognostic value of preoperative risk factors for heart failure in patients undergoing CABG.
• To identify key predictors of heart failure development at one year follow-up after CABG.

Main Methods:

• A cohort of 351 consecutive patients undergoing CABG were followed for 18 months.
• Logistic regression analysis was used to assess the association between preoperative variables and heart failure development (>class 2).
• Variables analyzed included: sex, age, left ventricular ejection fraction (EF), QRS duration, previous myocardial infarction (MI), history of heart failure, atrial fibrillation (AF), hypertension, hypercholesterolemia, diabetes, and previous stroke.

Main Results:

• Heart failure >class 2 occurred in 27% of patients at follow-up.
• Logistic regression identified a history of stroke (OR=3.94), diabetes (OR=1.98), and QRS duration (OR=1.02) as significant predictors of heart failure.
• Patients with QRS duration ≥140 ms (10% of cohort) had a significantly higher incidence of heart failure (51% vs. 24%) compared to those with QRS <140 ms.

Conclusions:

• Preoperative stroke history, diabetes, and QRS duration are valuable, inexpensive predictors of heart failure after CABG.
• Risk stratification for heart failure in CABG candidates can be improved using these readily available clinical variables.
• A small subset of patients may benefit from LV-based pacing, considered during the surgical procedure.