Q:2-What is the measurement provided by the PR interval on an EKG?
Mark one answer:
The time needed for the impulse to spread through the ventricles and pass through the SA node
The time needed for the impulse to spread through the atria and pass through the SA node
The time needed for the impulse to spread through the ventricles and pass through the AV junction
The time needed for the impulse to spread through the atria and pass through the AV junction

Q:3-What is specifically recorded by LEAD III on a 12-lead EKG?
Mark one answer:
The difference in electrical potential between the left leg and left arm electrodes
The difference in electrical potential between the left leg and right arm electrodes
The difference in electrical potential between the left arm and right arm electrodes
The electrical potential at one site relative to zero potential

Q:4-What is the Mason Likar modification?
Mark one answer:
An adjustment made during metabolic formula used to account for errors due to obesity
An alteration to the formula determining gross oxygen consumption for clients with asthma
A different arrangement for placing electrodes in a 12-lead EKG
A way to add resistance to certain exercises without physically increasing the weight of the dumbbell or apparatus

Q:5-What electrolyte abnormality causes an ST depression with prominent U waves and flattened T waves?
Mark one answer:
Hyperkalemia
Hypokalemia
Hypocalcemia
Hypercalcemia