Tachycardia, ventricular

An abnormally rapid heart rhythm that originates from a ventricle, one of the lower chambers of the heart. Although the beat is regular, ventricular tachycardia is life-threatening because it can lead to a dreaded condition, ventricular fibrillation. In ventricular fibrillation, the ventricles beat rapidly in a chaotic, purposeless fashion. The heart cannot pump blood effectively to the body. If untreated, ventricular fibrillation can be fatal within minutes, or even seconds. An estimated 250,000 Americans die in this way each year. Ventricular tachycardia is most commonly associated with heart attacks or scarring of the heart muscle from a previous heart attack.

Medical dictionary. 2011.

Look at other dictionaries:

  • Tachycardia — ECG showing sinus tachycardia with a rate of about 100 beats per minute. ICD 10 I47 I …   Wikipedia

  • Tachycardia — A rapid heart rate, usually defined as greater than 100 beats per minute. The tachycardias include sinus tachycardia, paroxysmal atrial tachycardia (PAT), and ventricular tachycardia. Sinus tachycardia is due to rapid firing of a normal structure …   Medical dictionary

  • Ventricular tachycardia — Classification and external resources ICD 10 I …   Wikipedia

  • Ventricular tachycardia — An abnormally rapid heart rhythm that originates from a ventricle, one of the lower chambers of the heart. Although the beat is regular, ventricular tachycardia is life threatening because it can lead to a dreaded condition, ventricular… …   Medical dictionary

  • Ventricular fibrillation — Infobox Disease Name = PAGENAME Caption = ECG lead showing VF DiseasesDB = ICD10 = ICD10|I|49|0|i|40 ICD9 = ICD9|427.41 ICDO = OMIM = MedlinePlus = eMedicineSubj = eMedicineTopic = MeshID = D014693 Ventricular fibrillation (V fib or VF) is a… …   Wikipedia

  • tachycardia — n. an increase in the heart rate above normal. Sinus tachycardia may occur normally with exercise or excitement or it may be due to illness, such as fever. Arrhythmias may also produce tachycardia (ectopic tachycardia). See: ventricular… …   The new mediacal dictionary

  • Ventricular arrhythmias — Abnormal rapid heart rhythms (arrhythmias) that originate in the lower chambers of the heart (the ventricles). Ventricular arrhythmias include ventricular tachycardia and ventricular fibrillation. Both are life threatening arrhythmias most… …   Medical dictionary

  • tachycardia — Synonyms and related words: abscess, ague, anemia, angina, angina pectoris, ankylosis, anoxia, aortic insufficiency, aortic stenosis, apnea, apoplectic stroke, apoplexy, arrhythmia, arteriosclerosis, asphyxiation, asthma, ataxia, atherosclerosis …   Moby Thesaurus

  • ventricular pause — a momentary delay in rhythmicity in ventricular tachycardia …   Medical dictionary

  • ventricular tachycardia — Pathol. a cardiac arrhythmia in which the muscles of the ventricles contract irregularly in a rapid, uncoordinated manner, impairing the normal pumping of blood. * * * …   Universalium

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