The Cardiovascular System)

a. arrhythmias – irregular heart beat. b. fibrillation -out of phase contractions-heart muscles appears as mass of writhing worms-makes ventricles worthless as pumps-circulation stops/brain dies. c. heart block-impaired transmission of impulses from atrium to ventricles-problem with av node-need pacemaker. C. electrocardiography. 1. ................
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