Delta waves are most characteristically associated with which condition?

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Multiple Choice

Delta waves are most characteristically associated with which condition?

Delta waves happen when the ventricles start to depolarize through an accessory pathway, bypassing the normal AV nodal route. That early ventricular activation creates a slurred upstroke at the start of the QRS complex and shortens the PR interval. This combination is the classic sign of pre-excitation, most strongly seen in Wolff-Parkinson-White syndrome. Other conditions have distinct ECG patterns without delta waves: Brugada syndrome shows characteristic ST-segment elevations in the right precordial leads; Long QT syndrome features a prolonged QT interval; atrial fibrillation presents with an irregular, usually rapid rhythm and no discrete P waves. Delta waves, then, point to pre-excitation via an accessory pathway.

Delta waves happen when the ventricles start to depolarize through an accessory pathway, bypassing the normal AV nodal route. That early ventricular activation creates a slurred upstroke at the start of the QRS complex and shortens the PR interval. This combination is the classic sign of pre-excitation, most strongly seen in Wolff-Parkinson-White syndrome.

Other conditions have distinct ECG patterns without delta waves: Brugada syndrome shows characteristic ST-segment elevations in the right precordial leads; Long QT syndrome features a prolonged QT interval; atrial fibrillation presents with an irregular, usually rapid rhythm and no discrete P waves. Delta waves, then, point to pre-excitation via an accessory pathway.

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