CRNE Canadian Registered Nurse

Category - Wellness

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A nurse is auscultating the heart of Ella, a 37-year-old female who comes to the clinic for her annual medical check-up. The nurse understands that there are two stages in one heart beat: diastole and systole. Which of the following events occurs during systole?

Ejection of blood into the systemic circuit
Ventricular relaxation
Myocardium perfusion
Refilling of ventricles

Explanation

Answer: A - During systole, blood is ejected into the pulmonary and systemic circuits. The ventricles contract during systole. Systole is followed by diastole, a stage in which the ventricles relax. Diastole is characterized by ventricular refilling, atrial contraction, and myocardial perfusion.

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