CRAT Exam Questions With Correct Answers 2024/2025 (100% VERIFIED)

CRAT Exam Questions With Correct Answers 2024/2025 (100% VERIFIED) 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 CRAT Study Guide With Correct Answers 2024/2025 | 100% VERIFIED No pacemaker spikes is... - Answer Failure to sense Pacemaker spikes with no P wave or QRS following it... - Answer Failure to capture Causes of wandering baseline - Answer Respiration or by lotion/sweat on the skin interfering with the signal Causes of 60-cycle interference - Answer Electrodes not properly applied, EKG machine not properly grounded, r by too many electrical devices nearby. How to fix 60-cycle interference - Answer Unplug and re-plug somewhere else. What does 60-cycle interference look like? - Answer Fat highlighter marks on baseline Causes of somatic tremor artifact - Answer Patient keeps moving, Parkinson's disease