冠動脈バイパス術後患者の心臓リハビリテーションにおける運動後心拍数減衰応答(T30)の変化

概要

論文の詳細を見る
The time constants of beat-by-beat heart rate decay for the first 30 seconds (T30) after exercise is a specific index for the vagally mediated component of heart rate recovery. The aim of our study was to determine whether cardiac rehabilitation (CR) can accelerate T30 in patients after coronary artery bypass grafting(CABG). Thirteen male patients who underwent CABG (aged 60.5±7.7years) were assigned to 7-21 day Phase I CR. Exercise training consisted of 30 minutes of aerobic exercise (bicycle ergometer) at the anaerobic threshold 2 times per day. T30 was measured as the heart rate decay regulated in patients who rested immediately after 5 minutes of pedaling exercise. After CR, T30 significantly improved from 413.3±129.7 to 300.1±124.5 sec (p<0.01). Peak oxygen uptake (peak VO_2 14.0±4.0→16.7±3.2mlin/kg:p<0.01) and heart rate at anaerobic threshold (HR @AT 111.9±13.4→103.6±11.7beatsin:p<0.01) also improved significantly. There was no correlation between ΔT30(Δ : difference before and after CR) and Δpeak VO_2 or ΔHR@AT. These results suggest that CR for patients following CABG accelerates vagally mediated heart rate recovery after dynamic exercise.
日本体力医学会の論文
2002-05-25