Strength duration curve for left ventricular epicardial stimulation in patients undergoing cardiac resynchronization therapy.

Introduction: The strength duration curve has been studied for right ventricular endocardial stimulation. There are differences between left ventricular epicardial and right ventricular endocardial stimulation due to different electrophysiologic properties and different electrode-tissue interface. The strength duration curve for epicardial left ventricular stimulation has not been studied so far.