Wolff-Parkinson-White Syndrome
What is Wolff-Parkinson-White syndrome?
Wolff-Parkinson-White syndrome is a condition
characterized by abnormal electrical pathways in the heart that cause a disruption of the heart's normal rhythm (arrhythmia).
The heartbeat is controlled by electrical signals that
move through the heart in a highly coordinated way. A specialized cluster of
cells called the atrioventricular node conducts electrical impulses from the heart's upper chambers (the atria) to the lower chambers (the ventricles). Impulses move through the atrioventricular node during each heartbeat, stimulating the ventricles to contract slightly later than the atria.
What are the symptoms of Wolff-Parkinson-White syndrome
People with Wolff-Parkinson-White syndrome are born with
an extra connection in the heart, called an accessory pathway, that allows
electrical signals to bypass the atrioventricular node and move from the atria to the ventricles faster than usual. The accessory pathway may also transmit electrical impulses abnormally from the ventricles back to the atria. This extra connection can disrupt the coordinated movement of electrical signals through the heart, leading to an abnormally fast heartbeat (tachycardia) and other arrhythmias. Resulting symptoms include dizziness, a sensation
of fluttering or pounding in the chest (palpitations), shortness of breath, and fainting (syncope). In rare cases, arrhythmias associated with Wolff-Parkinson-White syndrome can lead to cardiac arrest and sudden death. The most common arrhythmia associated with Wolff-Parkinson-White syndrome is called
paroxysmal supraventricular tachycardia.
What are the complications of Wolff-Parkinson-White syndrome?
Complications of Wolff-Parkinson-White syndrome can occur at any age, although some individuals born with an accessory pathway in the heart never experience any health problems associated with the condition.
Next: What other heart conditions is Wolff-Parkinson-White syndrome associated with? »
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