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Catecholaminergic polymorphic ventricular tachycardia (CPVT) is an inherited genetic disorder that predisposes those affected to potentially life-threatening abnormal heart rhythms or arrhythmias. The arrhythmias seen in CPVT typically occur during exercise or at times of emotional stress, and classically take the form of bidirectional ...
Examples of these inherited arrhythmia syndromes include Long QT syndrome (LQTS), Brugada Syndrome, Catecholaminergic polymorphic ventricular tachycardia, and Short QT syndrome. Many are also associated with environmental or neurogenic triggers such as response to loud sounds that can initiate lethal arrhythmias.
CPVT (catecholaminergic polymorphic ventricular tachycardia), PCCD (progressive cardiac conduction defect), Early repolarization syndrome, Mixed sodium channel disease, Short QT syndrome, Idiopathic ventricular fibrillation (IVF) Structural heart disease: Arrhythmogenic right ventricular cardiomyopathy (ARVC), Dilated cardiomyopathy (DCM),
Brugada syndrome was described as a cause for the sudden unexplained cardiac death syndrome seen in Thai men in 1997. [50] The first genetic mutations affecting the SCN5A gene associated with the syndrome were identified by their brother Ramon Brugada in 1998, [ 13 ] with many more mutations affecting at least 19 genes subsequently identified ...
Tachycardia may result in palpitation; however, tachycardia is not necessarily an arrhythmia. Increased heart rate is a normal response to physical exercise or emotional stress. This is mediated by the sympathetic nervous system on the sinus node and called sinus tachycardia.
Catecholamines are produced mainly by the chromaffin cells of the adrenal medulla and the postganglionic fibers of the sympathetic nervous system. Dopamine, which acts as a neurotransmitter in the central nervous system, is largely produced in neuronal cell bodies in two areas of the brainstem: the ventral tegmental area and the substantia nigra, the latter of which contains neuromelanin ...
Ventricular tachycardia (V-tach or VT) is a cardiovascular disorder in which fast heart rate occurs in the ventricles of the heart. [3] Although a few seconds of VT may not result in permanent problems, longer periods are dangerous; and multiple episodes over a short period of time are referred to as an electrical storm.
Supraventricular and ventricular tachycardia is thought to result in palpitations with abrupt onset and abrupt termination. [1] In patients who can terminate their palpitations with a Valsalva maneuver, this is thought to indicate possibly a supraventricular tachycardia. [1] Palpitations associated with chest pain may suggest myocardial ...