Heart rhythm : the official journal of the Heart Rhythm Society
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Multicenter Study
Multicenter study of the safety and effects of magnetic resonance imaging in patients with coronary sinus left ventricular pacing leads.
Magnetic resonance imaging (MRI) in patients with left ventricular (LV) leads may cause tissue or lead heating, dislodgment, venous damage, or lead dysfunction. ⋯ MRI scanning was performed safely in non-pacemaker-dependent patients with coronary sinus LV leads who were carefully monitored during imaging without clinically significant adverse effect on LV lead function.
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J waves can be observed in individuals of the general population, but electrocardiographic characteristics are poorly understood. ⋯ J waves in a general patient population were augmented at shorter RR intervals, but not at prolonged RR intervals. Mechanistically, conduction delay is most likely responsible for this.
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Data on the use of transesophageal echocardiography (TEE) during transvenous lead extraction (TLE) procedures are scarce. ⋯ New TEE findings produced during TLE necessitating immediate therapeutic measures occurred in only 0.6% of cases, suggesting the limited utility of routine continuous TEE monitoring during TLE.