EXAM 2- BASIC DYSRHYTHMIAS questions and answers with solutions 2025

what do you do if artifacts occur on an ECG? - ANSWER check connections in equipment rhythm starts in the SA node, 60-100 BPM, normal conduction pathway - ANSWER normal sinus rhythm normal P wave length - ANSWER .06-.20 the time of passive of impulse through the atria, causing atrial depolarization (atrial contraction) - ANSWER P wave normal PR interval length - ANSWER .12-.20 time taken for the impulse the spread through the atria, AV node, and bundle of HIS, bundle branches, & purkinje fibers, right up until ventricular contraction. (atrial contraction -> beginning of ventricular contraction) - ANSWER PR interval normal QRS length - ANSWER <.12 time taken for depolarization of both ventricles (systole- ventricular contraction) - ANSWER QRS normal ST segment length - ANSWER .12 time between ventricular depolarization and repolarization; should be isoelectric. (end of systole -> beginning of diastole) - ANSWER ST segment normal T wave length - ANSWER .16 ventricular relaxation (diastole) - ANSWER T wave