The Intrinsic Firing Rate of the AV Junction Is

question 9

Multiple Choice

The intrinsic firing rate of the AV junction is:

• A) 60 to 100 BPM.
• B) 10 to 20 BPM.
• C) 100 to 160 BPM.
• D) 40 to 60 BPM.

---

Definitions:

Atrial Contraction

The phase of the cardiac cycle in which the atria of the heart contract to pump blood into the ventricles.

QRS Complex

A series of three deflections in an electrocardiogram (ECG) representing the depolarization of the heart's ventricles before contraction.

Electrocardiogram

An Electrocardiogram (ECG) is a test that records the electrical activity of the heart to detect heart problems and monitor the heart's status.

Depolarization

The process by which a cell's resting membrane potential becomes less negative, leading to an action potential and potentially initiating a nerve impulse.