Right ventricular septal pacing: Safety and efficacy in a long term follow up

Figure 4 Average values of left ventricular ejection fraction at the baseline (1) and after two years of follow-up (2) in patients without significant stimulation (blue: control NO pacing), right ventricular apex paced patients (red: right ventricular apical ) and parahisian paced patients (green: parahis). In control patients and PH patients, the ejection fraction remained essentially normal (values above 50%), while in RVA patients it declined significantly to average values of around 40. RVA: Right ventricular; PH: Parahisian.