The underlying mechanism involves an accessory electrical conduction pathway between the atria and the ventricles. A small number of cases are due to a mutation of the PRKAG2 gene which may be inherited in an autosomal dominant fashion. The cause of WPW is typically unknown and is likely due to a combination of chance and genetic factors. ![]() The most common type of irregular heartbeat that occurs is known as paroxysmal supraventricular tachycardia. About 60% of people with the electrical problem developed symptoms, which may include an abnormally fast heartbeat, palpitations, shortness of breath, lightheadedness, or syncope. Wolff–Parkinson–White syndrome ( WPWS) is a disorder due to a specific type of problem with the electrical system of the heart involving an accessory pathway able to conduct electrical current between the atria and the ventricles, thus bypassing the atrioventricular node. ![]() Without symptoms 0.5% (children), 0.1% (adults) risk of death per year Watchful waiting, medications, radiofrequency catheter ablation Note the short PR interval.Ībnormally fast heartbeat, palpitations, shortness of breath, lightheadedness, loss of consciousness Ĭardiomyopathy, stroke, sudden cardiac death Įlectrocardiogram shows a short PR interval and a wide QRS complex from a delta wave ![]() WPW pattern, Ventricular pre-excitation with arrhythmia, auriculoventricular accessory pathway syndrome Ĭonduction through the accessory pathway results in a delta wave.Ī characteristic "delta wave" (arrow) seen in a person with Wolff–Parkinson–White syndrome. Medical condition Wolff–Parkinson–White syndrome
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