CASAL II OA Exam Questions with 100% Correct Answers

SA node Correct Answer pacemaker, 60-100bpm,Depolarization R atria, p wave, AV node Correct Answer Gatekeeper, intraseptal, Allows delay for blood so no back up, 40-60 bpm Bundle of His Correct Answer Intraventricular, 40-60bpm, sends to purkinje fibers for ventricular depolarization L and R bundle branches Correct Answer 20-40bpm, Purkinje fibers Correct Answer 20-40bpm, ventricular depolarization (QRS) complex Preload Correct Answer LVEDP determined by LVEDV Afterload Correct Answer Vascular resistance Cardiac output = Correct Answer heart rate x stroke volume Normal QRS complex Correct Answer 0.06-0.12 sec. (1.5-3 small boxes) P wave Correct Answer atrial depolarization QRS complex Correct Answer ventricular depolarization T wave Correct Answer ventricular repolarization U wave Correct Answer hypokalemia, depolarization purkinje fibers A Fib on EKG Correct Answer 1. P waves? No 2. P waves regular? U/A to determine 3. R waves regular? No irregular 4. How many R waves in 6 sec? 5. PR interval length? No, no p waves Saw tooth No p waves R waves irregular Stroke volume Correct Answer the volume of blood pumped out by a ventricle with each heartbeat Cardiac output Correct Answer Amount of blood pumped through body per min