Multiple Choice Cardiology

The single largest killer of Americans is:

adult respiratory distress syndrome
cancer
coronary heart disease
diabetes
hypotension

For Lead I, placement of the leads is on the:

left arm, left leg
left arm, right leg
right arm, left arm
right arm, left leg
right arm, right leg

The ECG-component that represents atrial depolarization is the:

P wave
QRS complex
T wave
U wave
S-T segment

Ventricular repolarization is indicated on the ECG tracing by the:

P wave
QRS complex
T wave
U wave
S-T segment

The time necessary for ventricular depolarization is represented by the:

P-R interval
QRS interval
QT interval
S-T segment
QRS complex

A delay in the AV node is indicated by a P-R interval:

between 0.01 and 0.20 seconds
between 0.04 and 0.12 seconds
greater than 0.40 seconds
less than 0.12 seconds
greater than 0.20 seconds

The total duration of ventricular depolarization is represented by the:

P-R interval
QRS duration
QT interval
S-T segment
QRS interval

With a heart rate of 180 beats per minute, you would expect the QT interval to be:

approximately 0.40 seconds
between 0.33 and 0.42 seconds
greater than 0.42 seconds
less than 0.33 seconds
none of the above

The duration from the beginning of the P wave to the beginning of the QRS complex is the:

P-R interval
QRS duration
absolute refractory period
relative refractory period
U wave

The interval during which the heart cannot be stimulated to depolarize except by a strong stimulus is the:

absolute refractory period
relative refractory period
P-R interval
QT interval
P wave

A significant Q wave has a:

duration of at least 0.02 seconds
duration of at least 0.04 seconds
negative deflection at least 1/4 the height of the QRS complex
positive deflection at least 1/3 the height of the QRS complex
deflection equal to the height of the P wave

Which of the following ECG lead combinations can be used to evaluate the anterior and lateral walls of the left ventricle?

aVR and V1
V1 and V2
V3 and V4
V5 and V6
V1 and V6

The ____ method of calculating heart rate counts the number of complexes in a 6-second strip

P-P interval
R-R interval
6-second
triplicate
hexagonal

Which of the following is characteristic of an abnormal sinus rhythm?

irregular rhythm
P-R interval of 0.16 seconds
QRS duration of 0.08 seconds
rate of 60-100
P wave before the QRS complex

The passive transfer of pacemaker sites from the SA node to other latent pacemaker sites in the atria or AV junction is:

wandering atrial pacemaker
premature atrial contractions
premature junctional contractions
premature ventricular contractions
atrial fibrillation