Serious arrhythmias that reduce the pumping efficiency of the heart may indicate __________.

a. damage to the myocardium
b. variations in the ionic composition of the extracellular fluids
c. injury to the SA and AV nodes
d. damage to the myocardium, injury to the SA and AV nodes, or variations in the ionic composition of the extracellular fluids


Answer: d. damage to the myocardium, injury to the SA and AV nodes, or variations in the ionic composition of the extracellular fluids

Anatomy & Physiology

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