Fig 2. LV Volume and heart rate relationship in patients with a normal EF in patients with poor and excellent exercise capacity.

Panel A demonstrates the differences in resting total LV size and LV chamber volume. The septal and posterior wall thickness was significantly increased in patients with poor exercise capacity. Panel B demonstrates the relationship of heart rate and indexed LV chamber volume at rest and with peak exercise. Circles: end-diastolic volumes, squares: peak systolic volumes. The vertical lines equal the stroke volume index. Panel C depicts cardiac outputs at rest and peak exercise in both groups. Error bars ±SE.