What is the primary goal of biventricular pacing in CRT?

The primary goal of biventricular pacing in cardiac resynchronization therapy (CRT) is to improve left ventricular function. This technique is specifically designed for patients with heart failure who have significant left ventricular dyssynchrony, often indicated by a widened QRS complex on the ECG. By coordinating the contractions of the left and right ventricles, biventricular pacing helps restore synchronicity between the ventricles.

Improving left ventricular function can lead to better cardiac output, reduced symptoms of heart failure, and enhanced quality of life for patients. It targets the underlying issues of electrical conduction problems in the heart that lead to inefficient pumping, which is crucial for those with advanced heart failure. This approach is distinct from strategies focusing solely on atrial contraction, heart rate management, or addressing heart block, which do not specifically target the synchronization of ventricular contractions to the same extent as CRT does.