Robert D. Schaller, DO @rdschaller @PennMedicine @Penn #HaroldLittMD #TamaraBrunkerPAC #MichaelPRileyMD #CIED #Cardio...

3 years 93 Views

Robert D. Schaller, DO, MS, FHRS from Perelman School of Medicine at the University of Pennsylvania speaks about Magnetic Resonance Imaging in Patients With Cardiac Implantable Electronic Devices With Abandoned Leads.

Link to Article:

Question about the main points Is it safe to use magnetic resonance imaging (MRI) on patients who have had their cardiac implantable electronic system (CIED) leads removed?

There were no significant adverse effects recorded in this cohort study of 139 patients who had 200 MRIs of different anatomic regions, including the thorax. Transient decreases in lead sensing in 5 patients and subjective sternal heating in 1 patient with an abandoned subcutaneous array and sternal wires were among the CIED parameter changes.

In other words, The results of this analysis indicate that, regardless of the anatomic area being examined, the existence of abandoned CIED leads does not rule out MRI.


The meaning of for certain cases, magnetic resonance imaging (MRI) is the preferred method of diagnosis. Patients with legacy cardiac implantable electronic devices (CIEDs) now have more access to MRI thanks to conditional devices and innovative imaging protocols. The presence of abandoned leads, on the other hand, is an utter no-no.

The goal to see if performing an MRI in the presence of an abandoned CIED lead is safe and if there are any negative effects on active CIED leads nearby.

Participants, Design, and Setting Between January 2013 and June 2020, this cohort study included consecutive CIED recipients who underwent 1.5-T MRI with at least one abandoned lead. At the University of Pennsylvania Hospital, MRI scans were done. No patients were turned away.

CIEDs were reprogrammed to satisfy the pacing needs of individual patients. Electrocardiography telemetry and pulse oximetry were constantly tracked, and if possible, live visual and voice communication with the patient was maintained during the scan. The CIED assessment was replicated after the MRI, and the programming was reset to baseline or a clinically acceptable environment.

Measures and Key Outcomes 
Variations of 50% or more in pre-and post-MRI capture thresholds, ventricular sensing of 40% or more, and lead impedance of 30% or more, as well as clinical sequelae including pain and sustained tachyarrhythmia, were considered important. If data on long-term follow-up leads was available, it was analyzed.

A total of 139 patients (110 men [79 percent]) with an average (SD) age of 65.6 (13.4) years had 200 MRIs of different anatomic regions, including the thorax, performed. Repeat examinations were normal, with one patient receiving up to 16 examinations. There were 243 discarded leads in total, with an average (SD) of 1.22 (0.45) per patient. The average (SD) number of active leads was 2.04 (0.78), with 64 patients (46%) requiring a pacemaker. In 41 patients (20.5%) who underwent MRI of the brain, a transmit-receive radiofrequency coil was used. There were no irregular vital signs or tachyarrhythmias that continued. There were no adjustments in battery voltage, power-on reset events, or pacing volume. There were transient CIED parameter shifts, including decreased right atrial sensing in four patients and decreased left ventricular R-wave amplitude in one patient. One patient who had a subcutaneous collection that had been discarded experienced sternal heating that went away when the analysis was stopped early.

Conclusions and Implications 
In this large observational study, which included patients who had their thorax examined, the risk of MRI in patients with abandoned CIED leads was minimal. The growing body of evidence casts doubt on the utter contraindication of MRI in patients with CIED leads that have been abandoned.