Heart rhythm : the official journal of the Heart Rhythm Society
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Multicenter Study
Clinical safety of the ProMRI pacemaker system in patients subjected to head and lower lumbar 1.5-T magnetic resonance imaging scanning conditions.
Permanent cardiac pacemakers have historically been considered a contraindication to magnetic resonance imaging (MRI). ⋯ The results of the ProMRI/ProMRI AFFIRM studies demonstrate the clinical safety and efficacy of the ProMRI pacemaker system in patients subjected to head and lower lumbar MRI conditions.
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Randomized Controlled Trial Multicenter Study
Low inappropriate shock rates in patients with single- and dual/triple-chamber implantable cardioverter-defibrillators using a novel suite of detection algorithms: PainFree SST trial primary results.
The benefits of implantable cardioverter-defibrillators (ICDs) have been well demonstrated in many clinical trials, and ICD shocks for ventricular tachyarrhythmias save lives. However, inappropriate and unnecessary shock delivery remains a significant clinical issue with considerable consequences for patients and the healthcare system. ⋯ In a large patient cohort receiving ICDs for primary or secondary prevention, the adoption of novel enhanced detection algorithms in conjunction with routine implementation of modern programming strategies led to a very low inappropriate shock rate.
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Randomized Controlled Trial
Pulmonary vein triggers play an important role in the initiation of atrial flutter: Initial results from the prospective randomized Atrial Fibrillation Ablation in Atrial Flutter (Triple A) trial.
The incidence of atrial fibrillation (AF) after ablation of a cavotricuspid isthmus (CTI)-dependent atrial flutter (AFL) is high. ⋯ Pulmonary vein triggers play an important role in AFL. PVI can prevent the recurrence of AFL, even without CTI ablation.
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Implantation of a left ventricular (LV) lead fails in 5% to 10% of patients in whom cardiac resynchronization therapy (CRT) is attempted. Alternatives for delivery of CRT are surgical epicardial and endocardial transvenous leads. Endocardial transseptal LV lead delivery is challenging because of the absence of dedicated equipment designed for this procedure. ⋯ This approach using an Endrys needle and a gooseneck snare provides a reliable and effective alternative technique for delivery of an endocardial LV lead that is delivered easily through a deflectable sheath inserted transseptally into the LV.