英语语法分析

Sinus bradycardia occurs when the heart rate falls below60.

窦性心动过缓是心率低于60次。

Infective intoxication, relative bradycardia and roseola were not common.

感染中毒症状，相对缓脉，玫瑰疹少见；

Lignocaine should be used with caution in patients with bradycardia-tachycardia syndrome.

患有心搏徐缓-心搏过速综合征的患者中应慎用利多卡因。