Which of the following correctly reflects the ECG indicators of ischemia?
a. Pathologic Q waves, ST-segment elevation
b. ST-segment elevation, T wave inversion
c. ST-segment depression, T wave inversion
d. Pathologic Q waves, ST-segment depression
Question 2The _____ originate from small mounds of myocardium called papillary muscles and serve as anchors to prevent the cusps of the AV valves from inverting into the atria.
a. Purkinje fibers
b. coronary sinuses
c. coronary arteries
d. chordae tendineae
Question 3The inferior surface of the left ventricle is supplied by the _____ coronary artery in most of the population.
a. left
b. right
Question 4Atrial fibrillation is characterized by _____.
a. one P wave before each QRS and a regular ventricular rate of 60 to 100 beats/min
b. an erratic, wavy baseline and irregular ventricular rhythm
c. saw-tooth or picket-fenceshaped waveforms preceding each QRS
d. P waves occurring before, during, or after the QRS complex; when seen, they are inverted
Question 5The most common type of supraventricular tachycardia (SVT) is _____.
a. atrial tachycardia
b. atrial flutter
c. AV reentrant tachycardia (AVRT)
d. AV nodal reentrant tachycardia (AVNRT)
Question 6What is meant by the term controlled atrial fibrillation?
a. The overall ventricular rate is less than 100 beats/min.
b. The atrial rate is less than 100 beats/min.
c. The overall ventricular rate is greater than 100 beats/min.
d. The atrial rate is greater than 100 beats/min.
Question 7The ventricular rhythm in atrial fibrillation is usually irregularly irregular.
Indicate whether the statement is true or false
Question 8A macroreentrant circuit is one that involves a small area of heart tissue, usually a few centimeters or less.
Indicate whether the statement is true or false
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