Multicenter study of the safety and effects of magnetic resonance imaging in patients with coronary sinus left ventricular pacing leads.

Background: Magnetic resonance imaging (MRI) in patients with left ventricular (LV) leads may cause tissue or lead heating, dislodgment, venous damage, or lead dysfunction.

Objective: The purpose of this study was to determine the safety of MRI in patients with LV pacing leads.

Methods: Prospective data on patients with coronary sinus LV leads undergoing clinically indicated MRI at 3 institutions were collected.