Refractory period in the ventricles

Refractory period in the ventricles Correct Answer Decreases during sympathetic stimulation of the heart, Corresponds to the period of ventricular contraction, Corresponds to the QRS complex of ECG, Corresponds to the period of ventricular action potential

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Refractory period in the ventricles corresponds to the
Absolute refractory period in the ventricles
Ceramics make excellent refractory materials. A material is said to be refractory if it: