MRI safe for most patients with cardiac devices

8:51 am Health Care, Medicine

Fewer than 1% of patients with implanted cardiac devices encountered device-related problems during MRI. MRI can be used safely in selected patients with implanted devices.

In three of 438 patients (0.3%), MRI triggered back-up programming mode in implanted devices. Right ventricular sensing and atrial and ventricular lead impedance values declined immediately after MRI. Long-term follow-up revealed decreased right ventricular sensing and lead impedance, increased right ventricular capture, and reduced battery voltage. None of the changes required revision or replacement of an implanted device, as reported in the October issue of Annals of Internal Medicine by Dr Saman Nazarian, of Johns Hopkins.


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