Exam 2- Basic Dysrhythmias Questions And Answers

Exam 2- Basic Dysrhythmias 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 is K or Na higher inside the cell? - Answer-K is K or Na higher outside the cell? - Answer-Na what happens with depolarization of a cell? - Answer-Na influx into cell normal QT - Answer-.34-.43 time taken for entire depolarization/repolarization of ventricles (ventricular contraction + relaxation) (ventricular diastole + systole) - Answer-QT the ability of a cardiac cell to fire spontaneously without being activated - Answer-automaticity the ability of a cell to become depolarized; determined by the length of time after depolarization that they can be restimulated (the refractory periods) - Answer-excitability SA node is firing 60 BPM P, QRS, T all normal regular rhythm - Answer-sinus bradycardia is sinus bradycardia ever normal? - Answer-yes- it's only significant wh