Basic Dysrhythmia study guide - test 2 Questions and Answers 100% Correct

Know how to measure the PR interval ( PRI)From where the P wave begins until the beginning of the QRS complex. 0.12 to 0.20 seconds (3 to 5 small boxes) in adults, longer in elderly people. Know how to measure the QRSFrom the end of the PR interval to the end of the S wave. 0.08 to 0.10 seconds. (2-2 1/2 boxes) Know the normal values for the PRI and the QRSPRI = 0.12 - 0.20 or 3-5 boxes QRS = 0.08 - 0.10 or 2- 2 1/2 boxes Know what electrical activity triggers which mechanical event. For example what electrical event represents atrial contraction?P wave (deflection wave/atrial depolarization); QRS complex (venticular depolarization); T wave (ventricular repolarization) Know the blood circulation through the heart, starting from the superior vena cava and progressing through the right side of the heart, the lungs and the left side, ending up finally going through the aortic valve and into the aorta.Suerior Vena Cava - Right Atria- Tricuspid Valve - Right Ventricle - Pulmonary Valve - Pulmonary Artery - Rt & Left Lungs - pulmonary veins - Left Atria - Mitral Valve - Left Ventricle - Aortic Valve - Ascending Aorta and coronary arteries Know the electrical conduction system of the heart. ( same as the last test)SA node - AV node - Bachmann's Bundle - *** - Rt & Lft Bundle Branches Know which central nerve slows the heart rate down when stimulatedVagus nerve