NURS 4626 EXAM 1 QUIZBANK

To determine whether there is a delay in impulse conduction through the ventricles, the nurse will measure the duration of the patient's: A) p wave B) q wave C) pr interval D) qrs complex D) qrs complex (the qrs complex represents ventricular depolarization. The p wave represents the depolarization of the atria. The pr interval represents depolarization of the atria, av node, bundle of his, bundle branches, and the purkinje fibers. The q wave is the first negative deflection following the p wave and should be narrow and short) The nurse needs to quickly estimate the heart rate for a patient with a regular heart rhythm. Which method will be the best to use? A) count the number of large squares in the r-r interval and divide by 300 B) print a 1-minute ecg strip and count the number of qrs complexes C) use the 3-sec markers to count the number of qrs complexes in 6 seconds and multiply by 10 D) calculate the number of small squares between one qrs complex and the next and divide into 1500 C) use the 3-sec markers to count the number of qrs complexes in 6 seconds and multiply by 10 (this is the quickest way to determine the ventricular rate for a pt with a regular rhythm. All of the other methods are accurate, but take longer) A pt has a junctional escape rhythm on the monitor. The nurse will expect the pt to have a heart rate of: A) 15-20 bpm B) 20-40 bpm C) 40-60 bpm D) 60-100 bpm C) 40-60 bpm (if the sa node fails to discharge, the av node will automatically discharge at the normal rate of 40-60 bpm. The slower rates are typical of the bundle of his and purkinje system and