Effect of metoprolol on rest and exercise left ventricular systolic and diastolic function in idiopathic dilated cardiomyopathy

Plots of left ventricular (LV) ejection fraction (y axis) against heart rate (beats/min, x axis) at rest (A) and during exercise (B) . Solid circles, All 18 patients before treatment; open circles, the 6 patients who received metoprolol. Lines of regression are shown (solid line, the 18 patients before treatment; dashed line, the 6 patients who received metoprolol).

Plots of peak filling rate (stroke volumes/s, y axis) against heart rate (beats/min, x axis) at rest (A) and during exercise (B) . Solid circles, All 18 patients before treatment; open circles, the 6 patients who received metoprolol. Lines of regression are shown (solid line, the 18 patients before treatment; dashed line, the 6 patients who received metoprolol).