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作者研究了五种配方的等渗造影剂所致心律失常的特性。实验用犬。经皮插入右冠状动脉导管并使之嵌楔在动脉内,导管远端压力低于30mmHg。该导管与压力换能器相接,以连续记录动脉压。经皮肤钳夹电极测Ⅱ导心电图。用搏动泵以0.4ml/秒之速度注射所试造影剂。以电阻加热器维持液体温度在37℃。注射持续25秒,或在出现室颤或心动过速时即停止。如发生室颤,则将导管撤至主动脉内,并用体外电极以320焦耳的电量对犬除颤。注射
The authors studied the properties of arrhythmias induced by isotonic contrast media of five formulations. Experimental dogs. The percutaneous insertion of the right coronary catheter and its wedging in the artery, the distal catheter pressure below 30 mmHg. The catheter is connected to a pressure transducer to continuously record arterial pressure. Transcutaneous vasculography electrodes measured Ⅱ leads ECG. The test contrast agent was injected at a rate of 0.4 ml / second using a pulsating pump. With a resistance heater to maintain the liquid temperature at 37 ℃. The injection lasted 25 seconds, or stopped in the event of ventricular fibrillation or tachycardia. In the event of ventricular fibrillation, the catheter is withdrawn into the aorta and the canine is defibrillated with 320 Joules of external electrodes. injection