What is a delta wave and with which condition is it associated?

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Multiple Choice

What is a delta wave and with which condition is it associated?

The delta wave is the slurred upstroke at the beginning of the QRS complex, produced by ventricular activation that starts earlier through an accessory conduction pathway outside the usual AV node route. This pre-excitation shortens the PR interval and broadens the QRS, creating that distinctive notch at the start of the QRS. The classic condition associated with a delta wave is Wolff-Parkinson-White syndrome, where an accessory pathway (theBundle of Kent) allows part of the ventricles to depolarize earlier than normal, predisposing to reentrant tachycardias. The other descriptions refer to different electrocardiographic findings not related to pre-excitation (hyperkalemia with tall T waves, hypercalcemia with shortened QT, AV block with prolonged PR), so they don’t match the delta wave phenomenon.

The delta wave is the slurred upstroke at the beginning of the QRS complex, produced by ventricular activation that starts earlier through an accessory conduction pathway outside the usual AV node route. This pre-excitation shortens the PR interval and broadens the QRS, creating that distinctive notch at the start of the QRS. The classic condition associated with a delta wave is Wolff-Parkinson-White syndrome, where an accessory pathway (theBundle of Kent) allows part of the ventricles to depolarize earlier than normal, predisposing to reentrant tachycardias. The other descriptions refer to different electrocardiographic findings not related to pre-excitation (hyperkalemia with tall T waves, hypercalcemia with shortened QT, AV block with prolonged PR), so they don’t match the delta wave phenomenon.

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