Rickli Hans, Facchini Marco, Brunner Hanspeter, Ammann Peter, Sagmeister Markus, Klaus Georg, Angehrn Walter, Luechinger Roger, Duru Firat
Division of Cardiology, Kantonsspital St Gallen, Switzerland.
Pacing Clin Electrophysiol. 2003 Jul;26(7 Pt 1):1494-7. doi: 10.1046/j.1460-9592.2003.t01-1-00216.x.
Electromagnetic fields may interfere with normal pacemaker function. Despite the introduction of modern pacemakers and bipolar lead systems, electromagnetic interference (EMI) still remains to be a concern during daily lives when patients are exposed to cellular phones, electronic security systems, and several household appliances. The aim of this study was to evaluate potential EMI risk of induction ovens, which are increasingly used in private households. The study included 40 consecutive patients (22 men, 18 women; age 73 +/- 11 years) with implanted DDD, VVI, VDD, and AAI pacemaker systems. The pacemakers were programmed to unipolar sensing and pacing. Sensitivity remained unchanged, if the measured sensing threshold was more than twice the programmed value; otherwise, it was set at half of the measured sensing threshold. Patients were placed in a sitting position at the closest possible distance of about 20 cm between two cooking pots and pacemaker bending the upper part of the body slightly over the induction oven. The energy was increased stepwise to the maximum. One pot was removed and placed again at the highest oven level. Potential interference was monitored continuously. The study showed no incidence of pacemaker malfunction during the entire test while the patients with intrinsic cardiac rhythms were exposed to the induction oven at varying energy strengths. Likewise, there was no external interference when the patients were paced at heart rates of 10-15 beats/min above their heart rates. The programmed parameters remained unchanged after the study. In conclusion, this study shows no EMI risk of an induction oven in patients with bipolar or right-sided unipolar pacemakers.
电磁场可能会干扰正常的起搏器功能。尽管现代起搏器和双极导联系统已经问世，但在日常生活中，当患者接触手机、电子安全系统和一些家用电器时，电磁干扰（EMI）仍然是一个令人担忧的问题。本研究的目的是评估越来越多地在私人家庭中使用的电磁炉的潜在电磁干扰风险。该研究纳入了40例连续植入DDD、VVI、VDD和AAI起搏器系统的患者（22例男性，18例女性；年龄73±11岁）。起搏器被程控为单极感知和起搏。如果测得的感知阈值超过程控值的两倍，则灵敏度保持不变；否则，将其设置为测得的感知阈值的一半。患者坐在两个烹饪锅之间尽可能近的距离约20厘米处，起搏器位于电磁炉上方，身体上部稍微弯曲。能量逐步增加到最大值。取出一个锅并再次放在烤箱的最高位置。持续监测潜在干扰。研究表明，在整个测试过程中，当具有固有心律的患者暴露于不同能量强度的电磁炉时，没有起搏器故障的发生。同样，当患者以高于其心率10 - 15次/分钟的心率进行起搏时，也没有外部干扰。研究后程控参数保持不变。总之，本研究表明，对于双极或右侧单极起搏器患者，电磁炉不存在电磁干扰风险。
