What is the conduction velocity of the Purkinje fibers?

Unlock all questions

This demo includes only 20 questions. Upgrade to access hundreds of questions, flashcards, exam simulations, and disable ads.

Full question bankExam simulationsFlashcards
From $24.99Unlock all

Prepare for the RCES Exam with flashcards and multiple choice questions, each offering hints and detailed explanations. Ensure your success with a comprehensive study plan!

Multiple Choice

What is the conduction velocity of the Purkinje fibers?

Explanation:
Purkinje fibers are built for rapid impulse transmission, delivering the signal quickly through the ventricles so they depolarize almost simultaneously. This fast conduction comes from their large-diameter fibers and abundant gap junctions, which lower axial resistance and allow currents to spread swiftly from cell to cell. As a result, their conduction velocity is among the highest in the heart, typically around 2–4 m/s and can be cited as up to about 5 m/s in some references. Among the options, 5 m/s best reflects this fast speed, faster than ventricular myocardium and far faster than the slow conduction of the AV node.

Purkinje fibers are built for rapid impulse transmission, delivering the signal quickly through the ventricles so they depolarize almost simultaneously. This fast conduction comes from their large-diameter fibers and abundant gap junctions, which lower axial resistance and allow currents to spread swiftly from cell to cell. As a result, their conduction velocity is among the highest in the heart, typically around 2–4 m/s and can be cited as up to about 5 m/s in some references. Among the options, 5 m/s best reflects this fast speed, faster than ventricular myocardium and far faster than the slow conduction of the AV node.

More Multiple Choice Questions
Subscribe

Get the latest from Examzify

You can unsubscribe at any time. Read our privacy policy