QT interval - Wikipedia, the free encyclopedia
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In medicine, specifically cardiology, the QT interval is a measure of the time between the start of the Q wave and the end of the T wave in the heart's electrical cycle. The QT interval is depen...
en.wikipedia.org/wiki/QT_interval
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A prolonged QT interval is a common thread among the various entities associated with sudden arrhythmia death syndrome. A number of drugs are known to cause QT prolongation (e.g., terfenadine), as are hypokalemia, hypomagnesemia, myocarditis, and endocrine and nutritional disorders.
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www.aafp.org/afp/20030801/483.html
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Torsade de pointes is widely thought to be triggered by reactivation of calcium channels, reactivation of a delayed sodium current, or a decreased outward potassium current that results in early afterdepolarization (EAD), in a condition with enhanced TDR usually associated with a prolonged QT interval.
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emedicine.medscape.com/article/157826-overview
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The association of torsade de pointes and a prolonged electrocardiographic QT interval is well described. ... A prolonged QT interval may be congenital or acquired in several ways--by the use of anti-arrhythmic agents exemplified by quinidine, by the presence of hypocalcaemia or hypokalaemia, by the use of psychotropic...
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www.medscape.com/medline/abstract/1290242
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Paradoxically, this induced a permanent bradycardia leading to the discovery of a grade II A-V block as well as a prolonged QT interval. Discontinuation of the drug resulted in a prompt normalization of these changes.
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www.medscape.com/medline/abstract/2322075
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The duration of the QT-interval is a measure of the time required for depolarization and repolarization to occur. In long QT syndrome, the duration of repolarization is longer than normal. Thus, the QT-interval is prolonged.
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www.qtsyndrome.ch/faq.html
www.qtsyndrome.ch/faq.html
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Drugs that Prolong the QT Interval and/or Induce Torsades de Pointes Ventricular Arrhythmia ... Drug-induced torsades de pointes (TdP), a specific type of ventricular arrhythmia that is associated with prolongation of the QT interval, is a well-understood form of drug toxicity.
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www.azcert.org/medical-pros/drug-lists/drug-lists.cfm
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A disorder of the heart's conduction system affecting the recharging of the heart after each heartbeat. ... This is called the Q-T interval. A problem in one of the ion channels can prolong the Q-T interval. A prolonged Q-T interval can increase your risk for a type of arrhythmia called torsade de pointes.
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www.texasheartinstitute.org/HIC/Topics/Cond/longqts.cfm
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This is a discussion on MedHelp about SSRI's and prolonged QT interval. Community members of MedHelp provide help, support, guidance and discussion around the topic of SSRI's and prolonged QT interval ... prolonged qt interval (3 replies):
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www.medhelp.org/forums/cardio/messages/34841a.html
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