![]() ![]() Echocardiogram: to rule out structural heart disease (e.g.Chest X-ray: to rule out other (non-cardiac) causes.Relevant laboratory investigations include: Type B (right-sided): negative delta wave in leads V1 and V2īlood tests may be useful in ruling out other (non-cardiac) causes of palpitations.Type A (left-sided): positive delta wave in the precordial leads (V1 – V6). ![]() Type A WPW pattern is a left-sided accessory pathway and type B WPW pattern is a right-sided accessory pathway.ĮCG features will be different depending on whether a person has type A or type B WPW pattern: 7 Wolff-Parkinson-White syndrome can also be subdivided depending on which side the accessory pathway runs in the heart. ECG showing the key features of Wolff-Parkinson-White syndrome including a short PR interval, delta waves and broad QRS complexes. Prominent R waves in V1-3: this mimics a posterior infarctionįigure 2.Incongruous ST segment and T waves changes. ![]() Key features of WPW on an ECG in sinus rhythm include: Other conditions that may present similarly include valvular disease, Ebstein’s anomaly (a congenital malformation of the tricuspid valve) and hypertrophic cardiomyopathy.
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