Click on image to view larger version.

Figure 2 Kaplan–Meier event-free survival curves for the end point of deaths due to progressive pump failure. Patients with atrial fibrillation (n = 419; solid line) were more likely than those in sinus rhythm (n = 6,098; broken line) to die from progressive pump failure (log-rank p < 0.001). The number of patients in each group surviving at each 365-day interval is displayed.