Exam (Heart)

Question 1

The Intrinsic Conduction System of the Heart

(SA node or Pacemaker) and what is the result?

Answer 1

-action potentials travel through atrial walls toward AV node

-result is atria contracting and depolarizing

Question 2

Atrioventricular Node

Answer 2

-action potentials are conducted from AV node to…

-Bundle of HIS, L and R bundle branches, and purkinje fibers

-result is ventricles contracting

Question 3

The ECG (function, p-wave, QRS complex, and T-wave)

Answer 3

Function- detects electrical activity of the heart

P-Wave- Atrial depolarization (meaning the SA node is functional)

QRS-complex- ventricular depolarization (meaning the AV node, bundle of his, bundle branches and p-fibers are functional)

T-wave- ventricular repolarization