In an adult, the normal duration of the QRS complex is _____.
a. 0.12 to 0.20 seconds
b. 0.10 seconds or less
c. 0.04 to 0.14 seconds
d. 0.20 seconds or less
Question 2Lead V5 views the _____ wall of the left ventricle.
a. lateral
b. anterior
c. posterior
d. inferior
Question 3In pacing, sensitivity refers to _____.
a. the ability of a pacemaker to recognize and respond to intrinsic electrical activity
b. a pacing lead with a single electrical pole at the distal tip of the pacing lead through which the stimulating pulse is delivered
c. the successful conduction of an artificial pacemaker's impulse through the myocardium, resulting in depolarization
d. the length of time between an atrial sensed or atrial paced event and the delivery of a ventricular pacing stimulus
Question 4The QT interval is measured from the beginning of the _____.
a. QRS complex to the end of the T wave
b. P wave to the end of the QRS complex
c. QRS complex to the beginning of the T wave
d. P wave to the beginning of the QRS complex
Question 5Which leads look at adjoining tissue in the inferior region of the left ventricle?
a. I, aVL
b. V1, V2
c. V3, V4, V5
d. II, III, aVF
Question 6List two factors that may affect the heart's efficiency as a pump.
What will be an ideal response?
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