Heart rhythm : the official journal of the Heart Rhythm Society

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• Heart Rhythm · Dec 2011

  Case Reports

  Left cardiac sympathetic denervation for the treatment of methadone-induced long QT syndrome.

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• Heart Rhythm · Nov 2011

  Case Reports

  Dual-chamber pacemaker implantation via both superior vena cavae in a patient with persistent left superior vena cava.

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• Heart Rhythm · Nov 2011

  Comparative Study

  Assessing electrocardiographic data quality and possible replacement of pharmacologic positive control in thorough QT/QTc studies by investigations of drug-free QTc stability.

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• Heart Rhythm · Oct 2011

  Prolonged QRS duration on the resting ECG is associated with sudden death risk in coronary disease, independent of prolonged ventricular repolarization.

  Abnormalities of ventricular repolarization as well as depolarization have been associated with increased risk of ventricular arrhythmias. ⋯ Prolonged QRSd, JTc, and severe left ventricular systolic dysfunction had independent contributions to risk of SCD in coronary disease, in this community-based setting.

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• Heart Rhythm · Oct 2011

  Postpacing abnormal repolarization in catecholaminergic polymorphic ventricular tachycardia associated with a mutation in the cardiac ryanodine receptor gene.

  Catecholaminergic polymorphic ventricular tachycardia (CPVT) is an arrhythmogenic disease for which electrophysiological studies (EPS) have shown to be of limited value. ⋯ M4109R- RyR2 is associated with a high incidence of SCD. The contribution of I406T to the clinical phenotype is unclear. In contrast to exercise testing, marked postpacing repolarization changes in a single beat accurately predicted carriers of M4109R- RyR2 in this family.

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