[Changes in ECG indices and hemodynamics during bicycle ergometry of patients following aortic valve prosthesis]

Correlated electrocardiographic and hemodynamic changes have been demonstrated in 60 convalescent patients within 3 years after aortic valve replacement by means of bicycle ergometry (BEM) and simultaneous Kubicek's impedance rheoplethysmography. As electrocardiographic ischemic changes are more frequent during recovery, while their hemodynamic causes are different during and after exercise, BEM load increment should be intermittent in patients with aortic valve prosthesis. Exercise-induced increase of R voltage that was mostly combined with inadequate hemodynamic response and accompanied by ischemic ST depression may be an additional criterion of threshold stress.