Which heart rate method calculation is the only one to be used for irregular rhythms?

When estimating the heart rate with the 6-second method, you locate 6 seconds on a rhythm strip, count the number of complete cardiac cycles, and multiply by:

You have begun performing an ECG on a patient who is awake and alert, and the tracing appears as a flat line. What is the FIRST thing you should do?

Mrs. Hansen has an ambulatory monitor in place. What instructions do you give her regarding the electrodes?

Identify the rectangular form below: 

How long does the Holter monitor, a type of ambulatory monitor, typically record an ECG?

Identify the following rhythm. The image below has 30 large boxes, PR interval is 0.20 sec and QRS measures 0.10 sec. 

After an exercise stress test, the patient will have a cooling-off period. How long does this last?

Which of the following needs to be avoided if at all possible when selecting a vein for phlebotomy?

If given the following tubes, what order should they be drawn in? Lithium HeparinEDTASodium CitrateSST