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Abnormal activation of the ventricles via right ventricular apical pacing deteriorates cardiac function, which may explain the increased mortality of patients with congestive heart failure receiving permanent pacemakers. We hypothesized that pacing at alternative sites may cause less detrimental effects on the cardiac function.

journal of the chinese medical association

Acute Effects of Dual-chamber Pacing on the Left Ventricular Systolic Function and Relaxation in Patients with Advanced AV Block and Sick Sinus Syndrome