Presence of additional nodal tissue connection “bundle of Kent” results into
**Core Concept**
The presence of an additional nodal tissue connection, known as the **bundle of Kent**, is related to the electrical conduction system of the heart. This accessory pathway can bypass the normal **atrioventricular (AV) node**, leading to premature ventricular contractions. The bundle of Kent is a type of **accessory electrical conduction pathway**.
**Why the Correct Answer is Right**
The bundle of Kent connects the **atria** directly to the **ventricles**, bypassing the normal AV node. This can lead to **premature atrial contractions** being conducted rapidly to the ventricles, resulting in **supraventricular tachycardia (SVT)** or **Wolff-Parkinson-White (WPW) syndrome**. The bundle of Kent can cause the heart to beat too quickly, leading to symptoms such as palpitations, shortness of breath, and dizziness.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because the bundle of Kent is not typically associated with **heart block**.
**Option B:** This option is incorrect because the bundle of Kent does not typically cause **bradycardia**.
**Option C:** This option is incorrect because the bundle of Kent is not typically associated with **atrial fibrillation** in the context provided.
**Clinical Pearl / High-Yield Fact**
The **Wolff-Parkinson-White (WPW) syndrome** is a classic example of a condition caused by an accessory electrical conduction pathway, such as the bundle of Kent. WPW syndrome can lead to **supraventricular tachycardia** and other arrhythmias.
**Correct Answer:** D. Wolff-Parkinson-White syndrome