The heart skeleton is fibrous connective tissue that acts as an electrical barrier between the atria and ventricles. If this structure was not functional, which of the following conditions might occur?
A. Blood flow from the right atrium to the left atrium
B. Spread of ectopic stimuli from the atria to the ventricles
C. Occlusion of the coronary arteries
D. Increase in pericardial fluid in the pericardial space
Answer: B
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