Which type of cardiac procedure delivers electrical impulses to correct atrial or ventricular dysrhythmias?
a. Coronary artery bypass graft case using CPB
b. Cardiac pacemaker
c. Off-pump coronary artery bypass graft
d. Stent placement
ANS: B
A pacemaker consists of a generator and leads, which produces electrical impulses to stimulate electromyocardial conduction and correct dysrhythmias.
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How are oncogenes and proto-oncogenes different?
a. Proto-oncogenes are activated tumor genes, whereas oncogenes are inactivated tumor suppressor genes. Formatted: Centered b. Oncogenes can lead to tumor formation, whereas proto-oncogenes prevent tumor formation. c. Oncogenes can lead to tumor formation, whereas proto-oncogenes are inactivated forms of oncogenes. d. Oncogenes are tumor suppressors, whereas proto-oncogenes cause tumor formation.