WPW syndrome all true except -
Wpw syndrome more common in males Wolff-Parkinson-White syndrome (WPWS) is a disorder due to a specific type of problem with the electrical system of the hea which has resulted in symptoms. About 40% of people with the electrical problem never develop symptoms. Symptoms can include an abnormally fast heabeat, palpitations, shoness of breath, lightheadedness, or syncope.Rarely, cardiac arrest may occur. The most common type of irregular heabeat that occurs is known as paroxysmal supraventricular tachycardia WPW is commonly diagnosed on the basis of the electrocardiogram in an asymptomatic individual. In this case, it is manifested as a delta wave, which is a slurred upstroke in the QRS complex that is associated with a sho PR interval. The sho PR interval and slurring of the QRS complex are reflective of the impulse making it to the ventricles early ( the accessory pathway) without the usual delay experienced in the AV node. If a person with WPW experiences episodes of atrial fibrillation, the ECG shows a rapid polymorphic wide-complex tachycardia (without torsades de pointes). This combination of atrial fibrillation and WPW is considered dangerous, and most antiarrhythmic drugs are contraindicated. When an individual is in normal sinus rhythm, the ECG characteristics of WPW are a sho PR interval (less than 120 milliseconds in duration), widened QRS complex (greater than 120 milliseconds in duration) with slurred upstroke of the QRS complex, and secondary repolarization changes (reflected in ST segment-T wave changes). In individuals with WPW, electrical activity that is initiated in the SA node travels through the accessory pathway, as well as through the AV node to activate the ventricles both pathways. Since the accessory pathway does not have the impulse slowing propeies of the AV node, the electrical impulse first activates the ventricles the accessory pathway, and immediately afterwards the AV node. This gives the sho PR interval and slurred upstroke of the QRS complex known as the delta wave. Ref Harrison 20th edition pg 1423
More common in females
Rt ventricular aberrant is commonly seen
Incidence | with age
Hea is structurally normal
C.V.S