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True or False
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1

Each cardiac cycle lasts an average of 30 seconds.
A)True
B)False
2

Repolarization is a period of electrical recovery when polarity is restored and follows depolarization.
A)True
B)False
3

The standard machine is a 12-lead electrocardiograph, which simultaneously records the electrical activity of the heart from 12 different views.
A)True
B)False
4

Bipolar leads monitor two electrodes.
A)True
B)False
5

The normal paper speed for an adult having an ECG is 25 mm per second.
A)True
B)False
6

Irregular heartbeats are called arrhythmia.
A)True
B)False
7

The U wave may be seen in patients who have low potassium levels or other metabolic disturbances.
A)True
B)False
8

Precordial leads are placed on the arms and legs and are bipolar.
A)True
B)False
9

The T wave is the recovery or repolarization of the ventricles.
A)True
B)False
10

The sensitivity control allows you to place marking codes on the ECG paper to identify the lead during each run.
A)True
B)False





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