CVS Practice Test

Question: 1 / 400

Which internodal tract is also known as Wenckebach?

Anterior tract

Middle tract

The internodal tract known as Wenckebach refers specifically to the middle tract of the heart's conduction system. This tract plays a critical role in the electrical conduction between the sinoatrial (SA) node and the atrioventricular (AV) node.

Wenckebach is associated with a specific type of heart block, known as second-degree AV block Type I, which involves progressive prolongation of the PR interval until a beat is dropped. This phenomenon is emblematic of the middle internodal tract’s function in the conduction pathway. Understanding this association can help in diagnosing and managing conduction disturbances in clinical practice.

The other internodal tracts, while also important for atrial conduction, do not carry the name Wenckebach nor are they directly linked to the characteristic conduction delays reflected in the clinical implications of this condition.

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Posterior tract

Ventricular tract

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