Wolff-Parkinson-White

Pode não ser a síndrome mais importante, mas certamente é o maior nome. Foi discutida recentemente aqui no escritório de Porto Alegre. Vale pelo menos um resumo rápido.

Abraços...




WPW SYNDROME

The WPW (Wolff-Parkinson-White) syndrome is characterized by an accessory connection between the atria and the ventricles (Kent bundle) which is parallel to the AV node and the His bundle system and usually conducts impulses much faster. Thus, there is pre-excitation, meaning a premature partial depolarization of the ventricles. Depending on the velocity of the spread of excitation through the accessory pathways, or depending on the depth of penetration into the ventricle prior to the normally conducted excitation—through the AV node—reaching the ventricle, there is a more or less pronounced delta wave. Because of the premature ventricular depolarization and the existence of the delta wave, the PQ interval (the conduction time) is reduced. The remaining part of ventricular depolarization ensues as usual; the second part of the QRS complex is normal. The spread of excitation and repolarization are disturbed (occasional ST reduction, negative T wave).
A common characteristic of all pre-excitation syndromes (Kent bundle, James bundle, Mahaim bundle) is the predisposition to paroxysmal reentry tachycardia.