Occurs when a patient has a very low potassium level - U wave



What complex occurs when th ventricles contract? - QRS complex



the heart has ___ valves? - 4



The two semilunar valves are? - pulmonic and aortic valves



Blood returning from the body to the hear enters the? - right atrium



The _____ vena cava gets it's blood from the head neck and upper extremities - superior



The _____ is the innermost layer of the heart - endocardium



_____ ______ ________ is a Condition when the h...
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