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实验在29只家兔身上进行。用2％普鲁卡因局麻。并用巴话朗制动。股动脉插管描记 血压,同时记录标准Ⅱ导心电图。将不锈钢针刺激电极插入兔NMH,用单相连续方波施行单极刺激。 1、刺激清醒家兔NMH可引起动脉血压和心电图改变:血压在刺激后2秒开始升高,可从对照水平均值102.8±15.3毫米汞柱升至177.3±24毫米汞柱。其中6只兔,伴随严重的心脏窦性停搏,继发出血压一时性降低,当心跳重新出现后,血压立即回升。刺激停止后2—10分钟血压恢复到对照水平。在29只兔刺激NMH引起的心电图改变为:2例表现为单纯快速心律失常如室性或室上性心动过速等。2例表现为单纯慢速性心律失常如窦性心动
The experiments were performed on 29 rabbits. With 2% procaine local anesthesia. And use Baron Brown brake. Femoral artery tracing blood pressure, while recording standard Ⅱ lead ECG. A stainless steel needle-stimulator electrode was inserted into rabbit NMH and monopolar stimulation was performed with a single-phase continuous square wave. 1. Stimulation of conscious NMH in rabbits caused changes in arterial blood pressure and electrocardiogram: blood pressure began to rise 2 seconds after stimulation and rose from 102.8 ± 15.3 mm Hg to 177.3 ± 24 mm Hg. Of the 6 rabbits, with severe cardiac sinus arrest, the blood pressure was temporarily reduced, and immediately after the heartbeat reappeared, the blood pressure rose immediately. Blood pressure returned to control levels 2-10 minutes after stimulation was stopped. The electrocardiogram (ECG) changes induced by NMH in 29 rabbits were as follows: 2 cases showed simple tachyarrhythmia such as ventricular tachycardia or supraventricular tachycardia. 2 cases showed simple slow-rate arrhythmia such as sinus rhythm