Electrocardiogram (EKG) Interpretation
1. Isovolumetric ventricular contraction: With ventricular depolarization, pressure increases in the ventricles and the tricuspid and mitral valves close while the pulmonic and aortic valves remain closed as well. 2. Ventricular ejection: The pulmonic and aortic valves open, and the ventricles eject blood (ventricular systole). 3.
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