Figure 1
From: Impact of exercise capacity on the long-term incidence of atrial arrhythmias in heart failure

Mortality (a) and hospitalization due to heart failure exacerbation (b) over time. The Kaplan–Meier estimates of mortality and hospitalization for HF exacerbation over a median follow-up of 6 years are shown for high-risk patients with improvement in peak V̇O2, high-risk patients without improvement in peak V̇O2, and patients with a preserved V̇O2. Tick marks indicate censored data. HF, heart failure; V̇O2, peak exercise oxygen consumption.