What period follows depolarization of the myocardium and represents a period during which no new cardiac potential can be propagated?
a. Refractory
b. Hyperpolarization
c. Threshold
d. Sinoatrial (SA)
Answer: a. Refractory
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Interruption or damage to the blood supply to the heart muscle is known as a myocardial infarction or heart attack
True False