CRAT Study Guide Questions with Correct Answers 100% Verified Quality

CRAT Study Guide Questions with Correct Answers 100% Verified Quality Normal PRI interval 0.12-0.20 Normal QRS interval 0.11 or less What does the P wave represent? Atrial depolarization What does the QRS complex represent? Atrial repolarization and ventricular depolarization Q wave indicates what? Dead myocardial tissue. Always a negative deflection What is the natural pacemaker of the heart? SA node 3 types of pacemakers 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? First-degree AV block (prolonged PRI >0.20 seconds) Define intrinsic beats The patient's own heart beat What is sensing? The ability for the heart to sense and respond to the electrical activity of the heart What is capture? The pacemaker sends a stimulus to the heart which causes the heart to depolarize Failure to sense Lack of pacemaker spikes where they should have been. Battery can be dead. Failure to capture (loss of capture) No P or QRS after the pacemaker spike Undersensing Pacemaker spikes in areas where they should not be (i.e. in the T wave, an ST segment, or on top of another QRS)