Androgenic Effects on Ventricular Repolarization
نویسندگان
چکیده
منابع مشابه
Effects of echinochrome on ventricular repolarization in acute ischemia.
BACKGROUND Myocardial ischemic electrophysiological alterations are associated with the generation of reactive oxygen species. However, electrophysiological effects of antioxidants are unclear. Our objective was to determine the effects of the antioxidant echinochrome on ventricular repolarization in a feline model of 30-min ischemia. METHODS AND RESULTS Activation-recovery intervals were mea...
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OBJECTIVE To assess the association between cigarette smoking and ventricular arrhythmias in adolescents. Novel electrocardiographic parameters -Tp-e interval, as well as Tpe/QT and Tpe/QTc ratios - were used to make this assessment. METHODS The study population consisted of 87 subjects aged between 16-19 years. Fifty-one adolescent smokers with no risk of arrhythmia comprised the Smoker Grou...
متن کاملEffects of diclofenac on ventricular muscle repolarization: proarrhythmic implications
Results Diclofenac (30 μM) decreased the amplitude of rapid (IKr) and slow (IKs) delayed rectifier and L-type calcium currents (ICa) without influencing transient outward (Ito) and inward rectifier (IK1) potassium currents. The action potential was slightly lengthened in ventricular muscle but shortened in Purkinje fibres by diclofenac (20 μM). The maximum upstroke velocity (Vmax) was decreased...
متن کاملAccentuated Vagal Antagonism of / 3 - Adrenergic Effects on Ventricular Repolarization
men. Methods and Results. Responses to two 5-minute intravenous isoproterenol infusions (0.01 ug/kg/min and 0.02 pg/kg/min) were evaluated in six type A and six type B men after pretreatment with either dextrose placebo or atropine (1.2 mg). Atropine significantly potentiated T wave attenuation in the recovery period after isoproterenol infusion (0.30±0.07 mV) compared with placebo (0.54±0.09 m...
متن کاملQuantitative Aspects of Ventricular Repolarization:
Introduction: QT dispersion assesses repolarization inhomogeneity on 12-lead standard ECG. However, the implications of the electrical cardiac vector during the repolarization phase (the T wave loop) with the genesis of this phenomenon are unknown. Methods and Results: The aim of this study was to explore conventional 12-lead resting ECG QT dispersion and the corresponding morphology of the spa...
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ژورنال
عنوان ژورنال: Circulation
سال: 2019
ISSN: 0009-7322,1524-4539
DOI: 10.1161/circulationaha.119.040162