心脏外科术后患者早期的运动能力观察

目的:通过心肺运动试验观察心脏外科术后患者早期的运动能力特点。方法:纳入安贞医院行心脏外科术后行早期心肺运动试验的患者，接受心脏外科手术后3个月内行心肺运动试验的患者40例，以手术日至心肺运动试验检查日的天数将患者分为出院组(术后30 d内，20例)、术后1月组(术后30～60 d，10例)和术后2月组(术后60～90...

Motor capacity early after cardiac surgery

Objective To observe the motor capacity of patients early after cardiac surgery using a cardiopulmonary exercise test.Methods Patients who had performed a cardiopulmonary exercise test within 3 months after cardiac surgery were included in this retrospective study.Patients who took the test within 30 days of the operation formed a discharge group(n=20),those within 30 to 60 days and 60 to 90 days formed the one month and two month groups(n=10 for both).The discharge group was further divided into an aortic surgery group(n=9),a bypass surgery group(n=6)and a valve surgery group(n=5)according to their procedure.The exercise capacity of each person was measured in terms of the changes in heart rate and systolic pressure from the resting to the anaerobic threshold stage.Anaerobic threshold,peak oxygen uptake and carbon dioxide ventilation equivalent were also recorded.Results All of the patients completed the cardiopulmonary exercise test above the anaerobic threshold,and no adverse events such as exercise accidents occurred.At the anaerobic threshold the average heart rate of the discharge group was(8.8±7.1)bpm,significantly lower than the averages of the one month and two months groups:(17.0±5.9)and(18.3±10.5)bpm respectively.The average anaerobic thresholds and peak oxygen uptakes of the 1 month and 2 months groups were not significantly different,but they were all significantly higher than the discharge group′s averages.There were,however,no significant differences among the groups in the average changes in their systolic pressure and carbon dioxide ventilation equivalent.Moreover,the average anaerobic threshold and peak oxygen uptake of the aortic surgery group and the bypass surgery group were significantly lower than the valve surgery group′s averages.Conclusions Postoperative motor ability after cardiac surgery improves significantly for at least 30 days.Patients who have received aortic or bypass surgery have significantly lower exercise capacity than those after valve surgery.