Echelon Tests Compilation tests with Complete Solutions

When the sympathetic nerve fibers are stimulated, the heart rate is ____________. ANS - elevated Electrode location sites should be rotated _______________ or when the pt is sweaty or has had a bath. ANS - q24h What method is used to calculate atrial and ventricular rate for irregular rhythms? ANS - 6 second rule T or F: The qrs complex in MCL1 can be negative and still be normal. ANS - T A wave form is a movement ______________ the isoelectric line in either a positive or negative direction. ANS - away from Lead II is helpful in detecting.... ANS - sinus node and atrial arrhythmias What affects preload: volume in the veins, pressure in the arteries or ventricles, or volume of blood in the ventricles? ANS - volume in the veins Along with Lead II, lead III is most helpful in monitoring changes in what part of the heart? ANS - Inferior wall MI What are the best areas to place electrodes? ANS - on soft tissue The ekg produces an upright pattern on the paper in response to electrical activity in the heart flowing towards a ANS - positive electrode The QT interval represents ANS - total ventricular activity What are the AV valves? ANS Electrode location sites What part of the EKG reflects the refractory period? ANS - The QRS to the peak of the T wave 5 large EKG strip boxes totals how much time? ANS - 1 second The PRI is considered abnormal or prolonged if it is ANS - 0.20 secs What is the most common cause for an alarm sounding? ANS - a loose lead wire Which lead is the most useful for routine monitoring and monitoring the sinus node? ANS - Lead II