Pericardium, Protective sac enclosing the heart; composed of two layers with fluid in between, Aortic Valve, Located between the left ventricle and the aorta, Ventricles, Lower chambers of the heart, Atrium, Upper right or left chamber of the heart, Systole, To expand; period during the cardiac cycle when the heart is in contraction and the blood is ejected through the aorta and the pulmonary artery, Diastole, To expand; period during the cardiac cycle when blood enters the relaxed ventricles from the atria, Hypotension, Low blood pressure, Hypertension, High blood pressure, When should the nurse check the apical pulse?, When the pulse is irregular, How does the nurse measure the apical pulse and for how long?, By placing stethoscope over the apex of the heart and listening for one full minute, Name two cardiac test, ECG/EKG and Stress Test, Thrombus, A stationary blood clot, Ischemia, To hold back blood; decreased blood flow to tissue caused by constriction or occlusion of a blood vessel.

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