EKG Certification Exam study guide!!

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 heart cannot meet the demands of the body. - Congestive heart failure the two entrance valves of the heart. - tricuspid and bicuspid valves ______ is the fibrous outer fluid filled layer that covers the heartand separates it from the contents in the chest cavity. - pericardium The EKG records the electrical impulses called. - cardiac cycle contraction of the atrium on ekg - Pwave contraction of the ventricles on EKG - QRS complex relaxation of the ventricles on EKG - T wave the right and left atria are know as the - receiving chambers the blood on its way from the left atrium to the left ventricle it goes thro what valve? - mitral valve the only way to oxygenate the blood id through the ____ and _____ in the lungs - alveoli and capillaries the heart is separeted by the _____ - Septum the speed of the EKG is normally run is? - 25 sec The color of the ground lead is? - green