Bertelsen Litten, Petersen Helen Høgh, Philbert Berit Thornvig, Svendsen Jesper Hastrup, Thomsen Carsten, Vejlstrup Niels
Department of Cardiology, The Heart Centre, Rigshospitalet, University of Copenhagen, Blegdamsvej 9, Copenhagen 2100, Denmark.
Danish National Research Foundation Centre for Cardiac Arrhythmia (DARC), Copenhagen, Denmark.
Europace. 2017 May 1;19(5):818-823. doi: 10.1093/europace/euw066.
The objective of this study was to investigate whether it is safe to perform 1.5-Tesla magnetic resonance imaging (MRI) scans in pacemaker (PM) patients without pulse oximetry or electrocardiogram monitoring and with no special specific absorption rate (SAR) or time limits, provided that the PMs are interrogated and programmed to asynchronous mode prior to the scan.
This study reports the outcome of 207 MRI scans on PM patients at Rigshospitalet, Copenhagen University Hospital from June 2010 to September 2013. All MRIs were performed with the PMs in asynchronous mode and without additional monitoring. There were no adverse events registered among the PM patients during the study period. The only statistically significant change after MRI scans was a small, but clinically insignificant increase in atrial sense. No occurrences of reprogramming to power-on-reset were registered.
It is possible to perform MRI scans relatively safely in PM patients without additional monitoring or change in the normal MRI protocol, given that the PM has been assessed and reprogrammed prior to MRI. This is especially important to remember in the acute setting where MRI scans may be delayed when monitoring facilities are unavailable.
本研究的目的是调查在没有脉搏血氧饱和度或心电图监测、没有特殊比吸收率（SAR）或时间限制的情况下，对起搏器（PM）患者进行1.5特斯拉磁共振成像（MRI）扫描是否安全，前提是在扫描前对PM进行询问并将其编程为异步模式。
本研究报告了2010年6月至2013年9月在哥本哈根大学医院里格霍斯皮塔利特对PM患者进行的207次MRI扫描的结果。所有MRI扫描均在PM处于异步模式且无额外监测的情况下进行。在研究期间，PM患者中未记录到不良事件。MRI扫描后唯一具有统计学意义的变化是心房感知有小幅但临床上无显著意义的增加。未记录到重新编程为上电复位的情况。
如果在MRI之前对PM进行了评估和重新编程，那么在没有额外监测或改变正常MRI协议的情况下，对PM患者进行MRI扫描相对安全是可行的。在急性情况下，当监测设备不可用时MRI扫描可能会延迟，记住这一点尤为重要。
