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Tachycardia, Ventricular - Physiopathology
Research News and Information
Definition of 'Tachycardia, Ventricular'An abnormally rapid ventricular rhythm usually in excess of 150 beats per minute. It is generated within the ventricle below the BUNDLE OF HIS, either as autonomic impulse formation or reentrant impulse conduction. Depending on the etiology, onset of ventricular tachycardia can be paroxysmal (sudden) or nonparoxysmal, its wide QRS complexes can be uniform or polymorphic, and the ventricular beating may be independent of the atrial beating (AV dissociation). |
Sunday, November 22, 2009
23 Sep 2009 
Ischemic focal ventricular tachycardia (VT) occurs in animals and humans. Angiotensin-converting enzyme inhibitors and receptor blockers reduce sudden death in patients with ischemic heart disease. In our dog model of coronary artery occlusion ... Read more...
16 Sep 2009 We tested the effect of the antianginal agent ranolazine on ventricular arrhythmias in an ischemic model using two protocols. In protocol 1, anesthetized rats received either vehicle or ranolazine (10 mg/kg, iv bolus) and were subjected to 5 min of ... Read more...
Increased susceptibility of aged hearts to ventricular fibrillation during oxidative stress.
16 Sep 2009 Oxidative stress with hydrogen peroxide (H(2)O(2)) readily promotes early afterdepolarizations (EADs) and triggered activity (TA) in isolated rat and rabbit ventricular myocytes. Here we examined the effects of H(2)O(2) on arrhythmias in intact ... Read more...
Latest indexed articles for 'Tachycardia, Ventricular - Physiopathology'
These are the very latest articles for this heading:
- Angiotensin II effects on ischemic focal ventricular tachycardia are predominantly mediated through myocardial AT(2) receptor. 23 Sep 2009
- Bidirectional ventricular tachycardia.
20 Sep 2009 - Ranolazine, an antianginal agent, markedly reduces ventricular arrhythmias induced by ischemia and ischemia-reperfusion. 16 Sep 2009
- Increased susceptibility of aged hearts to ventricular fibrillation during oxidative stress. 16 Sep 2009
- Vasculitis presenting with ventricular tachycardia. 30 Aug 2009
- GAP-134 ([2S,4R]-1-[2-aminoacetyl]4-benzamidopyrrolidine-2-carboxylic acid) prevents spontaneous ventricular arrhythmias and reduces infarct size during myocardial ischemia/reperfusion injury in open-chest dogs. 30 Aug 2009
- Partial hindlimb occlusion reduced the susceptibility to sustained ventricular tachycardia in conscious rats. 30 Aug 2009
- The utility of fragmented QRS complexes to predict significant intraventricular dyssynchrony in nonischemic dilated cardiomyopathy patients with a narrow QRS interval. 30 Aug 2009
- Capecitabine-induced cardiotoxicity: when to suspect? How to manage? A case report. 30 Aug 2009
- Improving our understanding of epicardial ventricular tachycardia in nonischemic cardiomyopathy. 23 Aug 2009
- Electroanatomic substrate and ablation outcome for suspected epicardial ventricular tachycardia in left ventricular nonischemic cardiomyopathy. 23 Aug 2009
- Cardiac autonomic neural remodeling and susceptibility to sudden cardiac death: effect of endurance exercise training. 12 Aug 2009
- Macrovolt T-wave alternans and polymorphic ventricular tachycardia. 2 Aug 2009
- [Ablation of idiopathic fascicular ventricular tachycardia] 31 Jul 2009
- Spinal cord stimulation improves ventricular function and reduces ventricular arrhythmias in a canine postinfarction heart failure model. 11 Jul 2009
- Reduction of repolarization reserve unmasks the proarrhythmic role of endogenous late Na(+) current in the heart. 8 Jul 2009
- Dose-related shortening of ventricular tachycardia cycle length after administration of the KATP channel opener bimakalim in a 4-day-old chronic infarct anesthetized pig model. 6 Jul 2009
- Why are (only) some infarcted hearts arrhythmogenic? 5 Jul 2009
- Fundamental differences in electrophysiologic and electroanatomic substrate between ischemic cardiomyopathy patients with and without clinical ventricular tachycardia. 5 Jul 2009
- Store overload-induced Ca2+ release as a triggering mechanism for CPVT and MH episodes caused by mutations in RYR and CASQ genes. 29 Jun 2009
See a longer list of these articles.
Technical information about 'Tachycardia, Ventricular'
Definition: An abnormally rapid ventricular rhythm usually in excess of 150 beats per minute. It is generated within the ventricle below the BUNDLE OF HIS, either as autonomic impulse formation or reentrant impulse conduction. Depending on the etiology, onset of ventricular tachycardia can be paroxysmal (sudden) or nonparoxysmal, its wide QRS complexes can be uniform or polymorphic, and the ventricular beating may be independent of the atrial beating (AV dissociation).
Descriptor UI: D017180
Alternative terms: Tachycardia, Ventricular; Tachycardias, Ventricular; Ventricular Tachycardias; Ventricular Tachycardia;
Allowable Qualifiers: blood; cerebrospinal fluid; chemically induced; classification; complications; congenital; diagnosis; diet therapy; drug therapy; economics; embryology; enzymology; ethnology; etiology; genetics; history; immunology; metabolism; microbiology; mortality; nursing; epidemiology; parasitology; pathology; physiopathology; prevention & control; psychology; radiography; radionuclide imaging; radiotherapy; rehabilitation; surgery; therapy; urine; veterinary; ultrasonography; virology;
Tree Number: C14.280.067.845.940; C23.550.073.845.940;
History Note: 93
Technical Notes: do not confuse with TACHYCARDIA, SUPRAVENTRICULAR which originates above the bundle of His