Editing Tachycardia (section)

====Ventricular====
{{Main|Ventricular tachycardia}}

Ventricular tachycardia (VT or V-tach) is a potentially life-threatening cardiac arrhythmia that originates in the ventricles. It is usually a regular, wide complex tachycardia with a rate between 120 and 250 beats per minute. A medically significant subvariant of ventricular tachycardia is called ''[[torsades de pointes]]'' (literally meaning "twisting of the points", due to its appearance on an EKG), which tends to result from a long QT interval.<ref>{{cite web | vauthors = Mitchell LB | date = January 2023| title = Torsades de Pointes Ventricular Tachycardia | work = Merck Manual Profesional Edition | access-date = 19 April 2019 | url = https://www.merckmanuals.com/professional/cardiovascular-disorders/arrhythmias-and-conduction-disorders/long-qt-syndrome-and-torsades-de-pointes-ventricular-tachycardia }}</ref>

Both of these rhythms normally last for only a few [[second]]s to [[minute]]s'' ([[paroxysmal tachycardia]])'', but if VT persists it is extremely dangerous, often leading to [[ventricular fibrillation]].<ref>{{cite journal | vauthors = Samie FH, Jalife J | title = Mechanisms underlying ventricular tachycardia and its transition to ventricular fibrillation in the structurally normal heart | journal = Cardiovascular Research | volume = 50 | issue = 2 | pages = 242–250 | date = May 2001 | pmid = 11334828 | doi = 10.1016/S0008-6363(00)00289-3 | doi-access = free }}</ref><ref>{{cite journal | vauthors = Srivathsan K, Ng DW, Mookadam F | title = Ventricular tachycardia and ventricular fibrillation | journal = Expert Review of Cardiovascular Therapy | volume = 7 | issue = 7 | pages = 801–809 | date = July 2009 | pmid = 19589116 | doi = 10.1586/erc.09.69 | s2cid = 207215117 }}</ref>