Wong Jorge A, Yee Raymond, Gula Lorne J, Skanes Allan C, Ross Ian G, White James B, Klein George J, Krahn Andrew D
Division of Cardiology, University of Western Ontario, London, Ontario, Canada.
Pacing Clin Electrophysiol. 2008 Mar;31(3):333-7. doi: 10.1111/j.1540-8159.2008.00994.x.
The implantable loop recorder (ILR) is a useful tool in the diagnosis of syncope. Our understanding of their functional and safety profile in interfering environments such as magnetic resonance imaging (MRI) becomes increasingly important as they become more prevalent.
We report four patients with an ILR who underwent MRI. The ILR memory was cleared before MRI and no changes were made to programmed settings. Device interrogation took place immediately after the scan. Patients were surveyed for device movement and heating, in addition to cardiopulmonary symptoms after their MRI.
Following MRI scanning, all patients were asymptomatic and no device movement or heating was observed. In addition, the functionality of the device remained unaffected. Artifacts mimicking arrhythmias were seen in all ILR patients regardless of the type of MRI scan.
MRI scanning of ILR patients can be performed without harm to patient or device, but artifacts that could be mistaken for a tachyarrhythmia are seen frequently.
植入式循环记录仪（ILR）是诊断晕厥的一种有用工具。随着ILR越来越普遍，我们对于它们在诸如磁共振成像（MRI）等干扰环境中的功能和安全性的了解变得越来越重要。
我们报告了4例接受MRI检查的植入ILR的患者。在MRI检查前清除了ILR的内存，且未对程控设置进行更改。扫描后立即进行设备问询。除了询问患者MRI检查后的心肺症状外，还调查了设备的移动和发热情况。
MRI扫描后，所有患者均无症状，未观察到设备移动或发热。此外，设备功能未受影响。无论MRI扫描类型如何，所有ILR患者的记录中均出现了类似心律失常的伪迹。
对植入ILR的患者进行MRI扫描不会对患者或设备造成损害，但经常会出现可能被误认为快速性心律失常的伪迹。
