tachycardia

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Related to Polymorphic ventricular tachycardia: atrial flutter, Monomorphic ventricular tachycardia

tachycardia:

see arrhythmiaarrhythmia
, disturbance in the rate or rhythm of the heartbeat. Various arrhythmias can be symptoms of serious heart disorders; however, they are usually of no medical significance except in the presence of additional symptoms.
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Tachycardia

 

an increase in the frequency of cardiac contractions. In some cases it is not perceived subjectively; in others, it is accompanied by palpitations.

A distinction is made between sinus tachycardia, or the accelerated generation of impulses in the sinus node of the heart, and paroxysmal tachycardia. Sinus tachycardia, manifested by contractions generally ranging between 90 and 120 per minute, may be caused by such physiological factors as increased environmental temperature, physical and mental tension, or the ingestion of food. Sinus tachycardia may also be caused by such pathological states as fever, anemia, diffuse toxic goiter, heart failure, and neurasthenia. Nervous and humoral influences on the heart, such as adrenalin and thyroxine, are important contributing factors in the genesis of sinus tachycardia. The accelerated rhythm of cardiac contractions may have an unfavorable effect on metabolism in the myocardium and on blood circulation. When tachycardia is a symptom of disease, the underlying disease is treated.

tachycardia

[¦tak·ə¦kärd·ē·ə]
(medicine)
Excessive rapidity of the heart's action.
References in periodicals archive ?
Kaufman, "Mechanisms and clinical management ofinherited channelopathies: long QT syndrome, Brugada syndrome, catecholaminergic polymorphic ventricular tachycardia, and short QT syndrome," Heart Rhythm, vol.
Mutations in the cardiac ryanodine receptor gene (hRyR2) underlie catecholaminergic polymorphic ventricular tachycardia.
Catecholaminergic polymorphic ventricular tachycardia is an arrhythmogenic disorder caused by mutations in one of the calcium regulatory genes [16].
Cardiac channelopathies are rare, inherited heart conditions including Long QT Syndrome (LQTS), Short QT Syndrome (SQTS), Brugada Syndrome (BrS) and Catecholaminergic Polymorphic Ventricular Tachycardia (CPVT).
Monomorphic and propafenone-induced polymorphic ventricular tachycardia in Brugada syndrome: a case report.
Cardiac channelopathies are rare, potentially lethal heart conditions, including Long QT Syndrome (LQTS), Brugada Syndrome (BrS) and Catecholaminergic Polymorphic Ventricular Tachycardia (CPVT).
Torsade de pointes is a form of polymorphic ventricular tachycardia that occurs in the setting of both congenital and acquired long QT syndrome (LQTS) (9).
s (NASDAQ: CLDA) PGxHealth(TM) division announced today that beginning October 22, 2007 its FAMILION family of genetic tests for cardiac channelopathies will include a test for Catecholaminergic Polymorphic Ventricular Tachycardia (CPVT) mutations.

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