CRAT TEST FINAL EXAM 2 VERSIONS AND STUDY

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CRAT TEST FINAL EXAM 2 VERSIONS AND STUDY

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When the technician is performing a 12 lead EKG, how many electrodes are used to record the 12 views of the heart? - Answer-10

When the technician is performing a 12 lead EKG, there would be 10 electrodes used to record the 12 leads or views of the heart. Twelve leads doesn't necessarily mean 12 electrodes.

Segments and waveforms on an ECG would include all but which of the following? - Answer-TB wave

Segments and waveforms on an ECG would include:PR

interval QRS complexQT intervalP waveST segmentU waveT wave

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The parasympathetic nervous system would do which of the following? - Answer-All of the above

The parasympathetic nervous system would:Slow the

patient's heart rateEnhance digestionDecrease the patient's blood pressureIs mediated by acetylcholine

If the contact on a electrode is not conducting well or the placement is wrong, which of the following could occur? - Answer-Wandering baseline

If the contact on a electrode is not conducting well or the placement is wrong, it could cause a wandering baseline.The wandering baseline can also be caused by chest wall during respiration.

When interpreting a cardiac rhythm strip, all of the following would be considered steps except? - Answer- Determining the age of the patient

When interpreting a cardiac rhythm strip, there are 5

steps: 2 / 3

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Examine all of the components and the shape of the waveforms.Check the position of the P wave.Determine if all the complexes are alike.Determine the rate of the rhythm and if it is normal or abnormal.Evaluate if the rhythm is regular or irregular.

Which of the following is the typical maximum length for a PR interval? - Answer-0.20 seconds is the typical maximum length for PR interval. This of course can vary with heart rate from 0.12 to 0.20 seconds.

Which of the following artifact results from electrical equipment, mobile telephones, and electrical power lines?

• Answer-Electromagnetic interference, also known as 60

cycle interference, is artifact caused by electrical equipment, mobile telephones, and electrical power lines.To minimize 60 cycle interference (or 60 Hz pickup), the technician should set the diagnostic mode of the 12-lead electrocardiogram monitor to 0.05-40 Hz. With the low frequency/high pass filter set to 0.05 the monitor should produce accurate ST-segments.

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