窦性心动过缓是指心脏由窦房结发出激动,其传导程序正常,而心房和心室率均在每分钟60次以下者。通常休息时心率在每分50至60次之间并不是不好的征兆,且常见于健康人而非病态。当心率每分钟为40～50次时,才可能是窦性心动过缓,虽然在休息时这样的心率运动员并不少见。当心率低于每分钟40次时,就可能出现症状,包括:头昏、眼花、眩晕、疲 Sinus bradycardia is the heart issued by the sinus node excited, the conduction process is normal, and the atrial and ventricular rate was 60 times per minute below. It is usually not uncomfortable to have a heart rate of 50 to 60 beats per minute at rest, and it is more common in healthy people than in sickness. When the heart rate 40 to 50 beats per minute, it may be sinus bradycardia, although at rest, such heart rate athletes are not uncommon. When the heart rate is less than 40 beats per minute, symptoms may occur, including: dizziness, vertigo, dizziness, fatigue