Fig. 2
From: Atrial-His bundle pacing in fulminant myocarditis with ventricular arrhythmia: a case report
Echocardiography at 1-year follow-up. Echocardiography at 1-year follow-up showed cardiac mechanical synchrony and ventricular systolic function in three different pacing modes. A1: HBP with DDD mode; A2: RVSP with DDD mode; A3: HBP with VVI mode. B: RVSP exhibited a greater intraventricular mechanical delay (IVMD) compared with HBP pacing. HBP with DDD mode showed optimum atrioventricular synchrony and left ventricular systolic function. HBP: His bundle pacing; RVSP: Right ventricular septal pacing; CO: Cardiac output; LVEF: Left ventricular ejection fraction; LVEDV: Left ventricular end-diastolic volume; LVESV: Left ventricular end-systolic volume; APEI: Aortic pre-ejection time; PPEI: Pulmonary pre-ejection time; IVMD: Intraventricular mechanical delay; TAPSE: Tricuspid annular plane systolic excursion