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顽固的重症心绞痛患者,由于冠状血管已硬化,用扩脉药治疗,冠脉血流量增加有限,效果常不佳。由于心肌耗氧量直接与心率、心收缩功能及反映心肌内壁张力的心室内压等因素相关,所以近年来已从降低耗氧量入手治疗心绞痛。藉刺激颈动脉窦,引起压力感受性减压反射,使心率、心收缩力、心室内压等降低和外周小动脉扩张,降低心肌耗氧量,能达到缓解疼痛等目的。
Stubborn patients with severe angina, due to coronary blood vessels have been sclerosis, with the proliferation of drug treatment, coronary blood flow limited increase, the effect is often poor. As myocardial oxygen consumption directly related to heart rate, cardiac systolic function and ventricular pressure and other factors reflecting the myocardial wall tension, so in recent years has started to reduce the consumption of oxygen to start treatment of angina. By stimulating the carotid sinus, causing baroreflex pressure reflex, the heart rate, cardiac contractility, reduced ventricular pressure and peripheral arterioles to expand, reduce myocardial oxygen consumption, can achieve the purpose of relieving pain and so on.