Harkel, A.D.J.T.

patient dyssynchrony study volume heart switch operation function aortic reference echocardiography systolic lv volume exercise children artery operation difference switch segment follow-up rt -3de tga /ivs tachycardia table lv dyssynchrony cardiomyopathy group dilatation value heart disease junctional reciprocating tachycardia population systolic adolescent cardiol tga /vsd disease right index transposition model lv volumes interval reference group resynchronization therapy rr interval result regurgitation echocardiographic survivor subject exercise capacity heart rate quality range capacity analysis aortic root dilatation assessment body surface area correlation interobserver variability american society performance figure ventricle reference population event therapy sinus rhythm pediatr aortic regurgitation echocardiogr onset ultrasound imaging oxygen uptake weight status ejection fraction rhythm