CRAT Study Guide – complete solutions with verified content, latest update review material

CRAT Study Guide With Complete
Solution | Verified | Latest Update.
Normal PRI interval - Correct Answer-0.12-0.20

Normal QRS interval - Correct Answer-0.11 or less

What does the P wave represent? - Correct Answer-Atrial depolarization

What does the QRS complex represent? - Correct Answer-Atrial repolarization and
ventricular depolarization

Q wave indicates what? - Correct Answer-Dead myocardial tissue. Always a negative
deflection

What is the natural pacemaker of the heart? - Correct Answer-SA node

3 types of pacemakers - Correct Answer-1) single (either RA or RV)
2) dual chamber (RA and LV)
3) bi-ventricular (RV and LV --> Congestive Heart Failure)

Which HB would you NOT need a pacemaker for? - Correct Answer-First-degree AV
block (prolonged PRI >0.20 seconds)

Define intrinsic beats - Correct Answer-The patient's own heart beat

What is sensing? - Correct Answer-The ability for the heart to sense and respond to the
electrical activity of the heart

What is capture? - Correct Answer-The pacemaker sends a stimulus to the heart which
causes the heart to depolarize

Failure to sense - Correct Answer-Lack of pacemaker spikes where they should have
been. Battery can be dead.

Failure to capture (loss of capture) - Correct Answer-No P or QRS after the pacemaker
spike

Undersensing - Correct Answer-Pacemaker spikes in areas where they should not be
(i.e. in the T wave, an ST segment, or on top of another QRS)

Cardioversion vs. Defibrillation - Correct Answer-Cardioversion: to change the heart
rhythm (usually from SVT to sinus)