A standard 12-lead ECG provides views of the heart in _____.
a. the frontal plane only
b. the sagittal plane only
c. the horizontal plane only
d. both the frontal and the horizontal planes
Question 2When the left ventricle contracts, freshly oxygenated blood flows through the _____ valve into the _____.
a. aortic; aorta
b. mitral; right atrium
c. tricuspid; right ventricle
d. pulmonic; pulmonary arteries
Question 3In the heart's conduction system, the _____ receive(s) an electrical impulse from the right and left bundle branches and relay(s) it to the ventricular myocardium.
a. AV node
b. SA node
c. Purkinje fibers
d. atrial pacemaker cells
Question 4What is meant by the term pulseless electrical activity (PEA)?
Question 5Where should the positive electrode for lead V5 be positioned?
a. Right side of the sternum, fourth intercostal space
b. Left midaxillary line at the same level as V4
c. Left side of the sternum, fourth intercostal space
d. Left anterior axillary line at the same level as V4
Question 6In the heart's conduction system, the _____ receive(s) an electrical impulse from the bundle of His and relay(s) it to the Purkinje fibers in the ventricular myocardium.
a. atrioventricular (AV) node
b. atria
c. sinoatrial (SA) node
d. right and left bundle branches
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