Question

Which of the following statements is true about the bundle of Kent?

• A. Abnormal pathway between two atria
• B. It is muscular or nodal pathway between the atria and ventricle in WPW syndrome
• C. It is slower than the AV nodal pathway
• D. None

Hint:

Accessory bypass of the AV node causing pre-excitation.

Answer 1

The Correct Option is B

Step 1: The bundle of Kent is an accessory atrioventricular pathway, an extra muscular connection that directly links the atria to the ventricles, bypassing the AV node.
Step 2: This bundle is the substrate of Wolff-Parkinson-White (WPW) syndrome, producing ventricular pre-excitation. So the true statement is that it is a muscular/nodal pathway between atria and ventricle in WPW syndrome.
Step 3: On ECG, pre-excitation gives a short PR interval, a wide QRS, and a delta wave because conduction skips the AV nodal delay.
Step 4: Option a is wrong (it connects atria to ventricles, not two atria) and option c is wrong (it conducts faster than the AV node, since it lacks the nodal delay).