Table 3. Test-retest reliability by intraclass correlation of real-time, free-breathing, long-axis evaluation approach.

Parameter	Resting	Peak Exercise	Reserve
End-diastolic volume	0.93	0.99	0.73
End-systolic volume	0.89	0.92	0.70
Stroke volume	0.88	0.97	0.67
Ejection fraction	0.74	0.87	0.64
Cardiac output	0.76	0.97	0.96
Heart rate	0.96	0.88	0.95
Global longitudinal strain	0.79	0.91	0.69