Which Criteria Must Be Met for the Heart to Function

Which criteria must be met for the heart to function efficiently?

A) Excitation and consequently contraction of the cardiac muscle fibres of each heart chamber should be coordinated to ensure efficient pumping.
B) The ventricles should be excited and contract before the onset of atrial contraction to ensure that ventricular filling is complete.
C) The right side of the heart should contract first to ensure that oxygenated blood is delivered to the heart before the left side contracts.
D) The fluid pressure in the pericardial cavity must be higher for the heart to function efficiently

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