Pacemaker programmer for reliable differentiation of selective and nonselective His bundle capture.

The article focuses on the His bundle pacing (HBP) that allows physiological depolarization of the ventricles. It mentions that differentiation between selective (S-HBP) and nonselective His bundle pacing (NS-HBP) on the basis of subtle changes in QRS morphology using differential voltage pacing and electrocardiography (ECG) leads from the pacemaker programmer might be challenging.