Heart rhythm : the official journal of the Heart Rhythm Society
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New-onset atrial fibrillation (AF) is not uncommon after ablation of typical atrial flutter (AFL); however, limited data are available for a risk prediction model for the future occurrence of AF in patients with typical AFL undergoing successful catheter ablation. ⋯ The HATCH score is a useful predictor of new-onset AF after typical AFL ablation.
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Atrioventricular nodal reentrant tachycardia (AVNRT) may coexist with Brugada syndrome (BrS). ⋯ Our results suggest that spontaneous AVNRT and concealed BrS co-occur, particularly in female patients, and that genetic variants that reduce sodium channel current may provide a mechanistic link between AVNRT and BrS and predispose to expression of both phenotypes.
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Prevention of sudden cardiac arrest (SCA) after removal of an infected implantable cardioverter-defibrillator (ICD) is a challenging clinical dilemma. The cost-effectiveness of the wearable cardioverter-defibrillator (WCD) in this setting remains uncertain. ⋯ The WCD likely is cost-effective in protecting patients against SCA after infected ICD removal while waiting for ICD reimplantation compared to keeping patients in the hospital or discharging them home or to a skilled nursing facility.
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Early repolarization (ER) with a horizontal ST segment (ST-h) and high-amplitude J waves in the inferior leads is associated with an increased risk of cardiac arrhythmic death. The effect of ethnicity and athletic status on this increased-risk ER pattern has not been established. Aboriginal Australian/Torres Strait Islander and Pacific Islander/Maori (non-Caucasian [non-C]) subjects are well represented in Australian sport; however, the patterns and prevalence of ER in these populations are unknown. ⋯ ER patterns associated with increased arrhythmic risk are more common in young non-C than C subjects and were not influenced by athletic status. The long-term clinical significance of ER in these populations is yet to be determined.