Benefits of exercise training in the treatment of heart failure. Study with a control group

Abstract

Objective - Exercise training programs have been proposed as adjuncts to treatment of heart failure. The effects of a 3-month-exercise-training-program with 3 exercise sessions per week were assessed in patients with stable systolic chronic heart failure. Methods - We studied 24 patients with final left ventricle diastolic diameter of 70±10mm and left ventricular ejection fraction of37±4%. Mean age was 52±16 years. Twelve patients were assigned to an exercise training group (G1), and 12 patients were assigned to a control group (G2). Patients undenvent treadmill testing, before and after exercise training, to assess distance walked, heart rate, systolic blood pressure, and double product. Results - In G2 group, before and after 3 months, we observed, respectively distance walked, 623±553 and 561±460m (ns); peak heart rate, 142±23 and 146± 33b/min (ns); systolic blood pressure, 154±36and 164±26 mmHg (ns); and double product, 22211 ± 6454 and 24293±7373 (ns). In GI group, before and after exercise, we observed: distance walked, 615±394 and 970± 537m (p<0.003) peak heart rate, 143±24 and 143±29b/min (ns); systolic blood pressure, 136±33 and 133±24 mmHg (ns); and double product, 19907± 7323 and 19115±5776, respectively. Comparing the groups, a significant difference existed regarding the variation in the double product, and in distance walked. Conclusion - Exercise training programs in patients with heart failure can bring about an improvement in physical capacity.