In recent years, the finding of long-term deleterious effects of right ventricular pacing (RVP) has led to an ongoing search for alternative pacing sites such as His bundle stimulation. The depolarization of the ventricles through the His-Purkinje cardiac conduction system seems to represent an ideal physiological approach to ventricular pacing, capable of engaging the normal conduction pathways and determining synchronous ventricular activation. However, there are still no clinical studies that have evaluated the electromechanical functions of the left ventricle with His bundle pacing (HBP) identified after electroanatomical reconstruction with 3D mapping system. Investigators aimed to compare the electromechanical effects on left ventricle of HBP, compared to RVP stimulation and to spontaneous rhythm of each patient.
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Evaluate the electrocardiographic differences of HBP, obtained by electroanatomical reconstruction with 3D mapping system, compared to the RVP and the patient's spontaneous rhythm.
Timeframe: 24 hours after implantation
Evaluate the echocardiographic differences of HBP, obtained by electroanatomical reconstruction with 3D mapping system, compared to the RVP and the patient's spontaneous rhythm.
Timeframe: 24 hours after implantation