tachycardia
noun [ C or U ] medical specialized uk/ˌtæk.ɪˈkɑː.di.ə/ us/ˌtæk.ɪˈkɑːr.di.ə/
心动过速（一般指安静时心率超过每分钟100次）
a heart rate that is over 100 beats per minute at rest
supraventricular tachycardia 室上性心动过速
Various types of tachycardias react well with medications. 有几种心动过速都对药物治疗反应良好。