Title of article :
Polymorphic ventricular tachycardia in the coronary care unit
Author/Authors :
Varriale، نويسنده , , Philip and Leonardi، نويسنده , , Marino، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2006
Pages :
7
From page :
283
To page :
289
Abstract :
Objective cribe the clinical experience of patients with polymorphic ventricular tachycardia (PMVT) in a hospital setting. s ar prospective, observational study of patients with symptomatic and asymptomatic PMVT admitted to the coronary care unit of a community medical center. Electrocardiograms were reviewed for a pattern diagnostic of PMVT, and the QTc interval of the baseline ECG was determined. Etiologic factors, management, and clinical outcomes were also analyzed. s udy included 27 patients (13 men) with a mean age of 66.6 ± 10 years. Fourteen patients had a prolonged QTc interval ≥520 ms (group A), and 10 patients had a normal QTc interval ≤440 ms (group B). Acute hypokalemia (n = 7) in the setting of underlying heart disease was the principal cause of the acquired QT syndrome; other causally related factors included severe bradycardia and the proarrhythmic effect of drugs. Acute myocardial infarction (n = 6) was the principal cause of PMVT associated with a normal QTc interval; other causal factors included right ventricular cardiomyopathy and the proarrhythmic effect of electrical cardioversion. Eight patients (group C) had brief runs of asymptomatic nonsustained PMVT, which recurred in 5 patients as symptomatic sustained PMVT despite appropriate treatment. Cardiac arrest (63%) requiring emergency defibrillation was the predominant clinical presentation irrespective of the QT interval. Four patients (15%) died, but only 2 owing to refractory PMVT/VF. sion ith or without QTc prolongation is a sporadic tachyarrhythmia that has frequent malignant potential for cardiac arrest. Successful management mandates emergency defibrillation for cardiac arrest and other appropriate measures for suppression of PMVT. The prognosis of PMVT is improved when the cause is correctly identified and promptly treated.
Journal title :
Heart and Lung
Serial Year :
2006
Journal title :
Heart and Lung
Record number :
1858682
Link To Document :
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