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What is QT interval prolongation? 2005

David A Vorchheimer
Mount Sinai School of Medicine, Coronary Care Unit, Mount Sinai Medical Center, New York, NY USA.

QT interval prolongation is an irregularity of the electrical activity of the heart that places patients at risk for ventricular arrhythmias. Serious complications of drug-induced QT interval prolongation are rare; the identification of patients at risk may help to prevent these events.

UI MeSH Term Description Entries
D008133 Long QT Syndrome A condition that is characterized by episodes of fainting (SYNCOPE) and varying degree of ventricular arrhythmia as indicated by the prolonged QT interval. The inherited forms are caused by mutation of genes encoding cardiac ion channel proteins. The two major forms are ROMANO-WARD SYNDROME and JERVELL-LANGE NIELSEN SYNDROME. Electrocardiogram QT Prolonged
D008297 Male Males
D005260 Female Females
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D012307 Risk Factors An aspect of personal behavior or lifestyle, environmental exposure, inborn or inherited characteristic, which, based on epidemiological evidence, is known to be associated with a health-related condition considered important to prevent. Health Correlates,Risk Factor Scores,Risk Scores,Social Risk Factors,Population at Risk,Populations at Risk,Correlates, Health,Factor, Risk,Factor, Social Risk,Factors, Social Risk,Risk Factor,Risk Factor Score,Risk Factor, Social,Risk Factors, Social,Risk Score,Score, Risk,Score, Risk Factor,Social Risk Factor
D016171 Torsades de Pointes A malignant form of polymorphic ventricular tachycardia that is characterized by HEART RATE between 200 and 250 beats per minute, and QRS complexes with changing amplitude and twisting of the points. The term also describes the syndrome of tachycardia with prolonged ventricular repolarization, long QT intervals exceeding 500 milliseconds or BRADYCARDIA. Torsades de pointes may be self-limited or may progress to VENTRICULAR FIBRILLATION. Torsade de Pointes,Pointes, Torsade de,Pointes, Torsades de,de Pointes, Torsade,de Pointes, Torsades

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