Medca EKG Practice Questions with verified solutions

1. A device on the skin that picks up electrical impulses given off by the heart is known as electrode 2. The heart is located on the left side of the chest 3. The body returns oxygen-poor blood to the heart via the 4. In lead l, activity of the heart is being measured from 5. The human heart weighs approx- imately 6. What position should the patient be in for an ECG 7. Where is the chest electrode V2 located vena cavae the right arm to the left arm 11 ounces supine at the fourth intercostal space at the left margin of the sternum 8. Lead l, ll, lll are called standard leads 9. The right and left atrium are the chambers 10. The atria contains what kind of blood 11. The valve separates the left ventricle from the aorta 12. The regulate the flow of blood into and out of the proper chambers 13. Which electrode is used as a ground reference receiving both oxygenated and deoxygenated blood aortic valves right leg 14. 12 The standard ECG consists of how many leads 15. The contraction of the heart muscle is cause by the flow of through the muscle tissue 16. The pressure is the pressure inside the arteries during ventricular contraction; when blood is pumped from the heart to the body 17. The ECG tracing should be per- formed in a quiet environment because 18. (True or False) The ECG records the actual image of the heart 19. The hardest working chamber if the heart is the 20. What is the term used to refer to an electrocardiogram that is within normal limits electrical impulse systolic interference is minimized false left ventricle normal sinus rhythm 21. The augmented leads are unipolar 22. The epicardium is the outer layer of the heart wall 23. The ability of the pacemaker cells of the heart to create an electrical impulse without being stimulated from another source automaticity 24. The precordial leads include leads V1 to V6 25. The QRS complex represents contraction of the ventricles