n.心跳加速；心动过速
He was comatose and had a severe fever and tachycardia. 他处于昏迷状态，伴高热和心动过速。
There is sudden onset of tachypnea, dyspnea and tachycardia. 突然发作呼吸急促、呼吸困难和心动过速。
