Physical training after heart valve replacement.

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Abstract
The efficacy of physical training in patients recovering from the replacement of a single heart valve was examined. Patients were allocated to a test or control group 2 wk after operation. Each patient performed a submaximal exercise test at entry, and 12 and 24 wk after this test. The Canadian Air Force exercise program was undertaken by the test group; the control group continued normal activities for the 24 wk between the 1st and last exercise group. A regression line of submaximal heart rate on O2 consumption was calculated from the data of each exercise test in each patient. Alterations in this line were used as an index of changes in cardiorespiratory fitness. Individual results showed a consistent improvement in cardiorespiratory fitness over the first 12 wk in both groups. Patients in the test group continued to improve between 12-24 wk. The exercise program modified the recovery of cardiorespiratory fitness after operation. Results in patients who developed clinical complications and were excluded from the trial predicted a deteriorating clinical condition. Sequential exercise tests evidently are valuable after cardiac surgery [for physical rehabilitation of patients suffering from ischemic heart diseases.].