Table 3.

Relationships of CMR imaging and echocardiography with exercise capacity.

Variables	Peak VO2		Predicted peak VO2
	r	p value	r	p value
CMR imaging
RV end-diastolic volume index	−0.29	<0.01	−0.24	0.03
RV end-systolic volume index	0.05	0.15	0.13	0.23
RV ejection fraction	−0.30	<0.01	−0.24	0.03
LV end-diastolic volume index	0.04	0.09	0.03	0.78
LV end-systolic volume index	0.11	0.34	0.03	0.78
Echocardiography
RV basal diameter	−0.30	<0.01	−0.09	0.43
RV end-diastolic area	−0.25	0.03	−0.09	0.41
RV end-systolic area	−0.24	0.03	−0.08	0.47
RV FAC	0.05	0.69	0.02	0.83
TAPSE	0.05	0.66	0.09	0.83
S	0.14	0.21	<0.01	0.94
LV end-diastolic diameter	0.22	0.04	0.02	0.85
LV end-systolic diameter	0.22	0.04	<0.01	0.97
LV ejection fraction	0.08	0.45	0.04	0.27

CMR = cardiac magnetic resonance; FAC = fractional area change; LV = left ventricular; RV = right ventricular; S = tricuspid annular systolic velocity; TAPSE = tricuspid annular plane systolic excursion; VO₂ = oxygen uptake.