Risk of VF Undersensing in Extra-Vascular ICD Due to Concomitant Leadless Pacing.

Extravascular implantable cardioverter-defibrillators (EV-ICD) offer defibrillation, anti-tachycardia pacing (ATP), and backup pacing, packaged in a unit comparable to traditional transvenous ICDs in size, shape, and longevity. However, the pacing capabilities of EV-ICD are restricted to ATP, pause prevention and post-shock pacing. For EV-ICD patients who develop the need for pacing, having a concomitant leadless pacemaker such as Micra could provide the needed pacing support.