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心绞痛患者经体育锻炼后,活动量常可显著增加,体育锻炼的益处,部份是由于可使同一亚极量运动后的心率减慢,心肌代谢降低,使心肌的氧供应及氧消耗达到平衡;同时,亦可能由于锻炼使心肌缺血区域的供血得到改善。本文报告狗的实验结果,证明体育锻炼能改善心肌慢性侧枝循环。方法:选择28只能作平板活动的健康狗,开胸后经左内乳动脉插入导管至升主动脉,另一导管经左心耳插至左房。冠状动脉左前降支在斜角支起源的远端,安置1.5毫米ameroid缩窄器,由于ameroid有亲水的特点,在5天后造成冠状动脉完全阻塞。同时,结扎左回旋支造成管腔阻塞60～
After physical exercise, patients with angina often have a significant increase in their activity. The benefits of physical exercise are partly due to the fact that the same sub-maximal exercise slows down the heart rate and reduces myocardial metabolism, balancing the oxygen supply and oxygen consumption in the myocardium ; At the same time, may also be due to exercise to myocardial ischemia improved blood supply. This article reports the experimental results of dogs, demonstrating that physical exercise can improve chronic collateral circulation in the heart. Methods: Twenty-eight healthy dogs were selected for plate activity. After thoracotomy, the left internal mammary artery was inserted into the ascending aorta and the other catheter was inserted into the left atrium through the left atrial appendage. Left anterior descending coronary artery in the beak originated distal, 1.5 mm ameroid constrictor, due to ameroid hydrophilic features, resulting in 5 days after the complete obstruction of the coronary artery. At the same time, ligation of left circumflex artery lumen obstruction caused 60 ~