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CRAT Study Guide With Correct Answers.
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CRAT Study Guide With Correct Answers.
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By: sepadgett • 8 months ago
It advertises for 3 pages. This is not three pages. It's 2 and a few sentences. Don't waste your time!
By: manano2015 • 1 year ago
By: infantsundar • 1 year ago
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CRAT Study Guide With Correct Answers.Normal PRI interval - Answer 0.12-0.20
Normal QRS interval - Answer 0.11 or less
What does the P wave represent? - Answer Atrial depolarization
What does the QRS complex represent? - Answer Atrial repolarization and ventricular depolarization
Q wave indicates what? - Answer Dead myocardial tissue. Always a negative deflection
What is the natural pacemaker of the heart? - Answer SA node
3 types of pacemakers - 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? - Answer First-degree AV block (prolonged PRI >0.20 seconds)
Define intrinsic beats - Answer The patient's own heart beat
What is sensing? - Answer The ability for the heart to sense and respond to the electrical activity of the heart
What is capture? - Answer The pacemaker sends a stimulus to the heart which causes the heart to depolarize
Failure to sense - Answer Lack of pacemaker spikes where they should have been. Battery can be dead.
Failure to capture (loss of capture) - Answer No P or QRS after the pacemaker spike
Undersensing - 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 - Answer Cardioversion: to change the heart rhythm (usually from SVT to sinus)
Defibrillation: only used for pulseless VT and v-fib
Pacemaker inhibition - Answer Pacemaker doesn't work because it senses the heart is beating at or above the programmed rate
A-V sequential pacing - Answer When the pacemaker paces both the atrium and the ventricle
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