Question: 8. Which One Of The Following Statements Is FALSE Regarding Electrical Conduction Of The Heart? A. Myocardial Cells Contract When Stimulated By Electrical Signals From The Pacemaker Cells. B. Pacemaker Cells In The Sinoatrial Node Generate Electrical Signals That Cause The Heart To Contract. C. The Bundle Of His Allows Electrical Signals From The Atria …
8. Which one of the following statements is FALSE regarding electrical conduction of the heart? a. Myocardial cells contract when stimulated by electrical signals from the pacemaker cells. b. Pacemaker cells in the sinoatrial node generate electrical signals that cause the heart to contract. c. The bundle of His allows electrical signals from the atria to move to the ventricles. d. Transmission of the electrical impulse from the SA nodes to the ventricles is called repolarization. 9. Which of the following is NOT part of an electrocardiograph machine? a. Recorder that graphically records the electrical signals b. Electrodes that transmit electrical signals from the heart to the cables c. Cable that splits into individual lead wires d. Amplifier to increase electrical signal strength 10. The smallest square on electrocardiograph paper is a. 1 mm X 1 mm square b. 1 cm X 1 cm square c. 5 mm X 5 mm square d. 5 cm X 5 cm square 11. A 12 lead ECG is called this because a. electrodes can be attached in twelve different locations b. it results in twelve electronic views of the heart c. the procedure takes twelve seconds d. twelve leads are attached to the patient 12. What is the color code for the left leg lead? a. Black b. Green C. Red d. White 13. What is the color code for the right arm lead? a. Black b. Green C. Red d. White Page 41 of 46 14. Where is a blue color-coded chest lead placed? a. 4 intercostal space, right border of sternum b. 5 intercostal space, left mid-clavicular line C. Anterior axillary line, parallel to V2 d. Mid-axillary line, same level as V4 and V5 15. What is the color code for a V6 chest lead? a. Green b. Orange c. Purple d. Yellow 16. Which of the following lead views is useful for diagnosing inferior wall myocardial infarction? a. Lead 1 b. Lead 11 c. Leads I and II d. Lead III 17. Which of the following leads are bipolar? a. Standard limb leads b. Augmented leads C. Precordial leads d. All leads are bipolar 18. Which of the following is a FALSE statement regarding patient preparation for an ECG procedure? a. Before applying electrodes, alcohol wipes should be used to remove skin oils, lotions, soaps, etc. from the patient’s skin. b. It may be necessary to shave body hair to assure good adherence of the electrodes. C. Electrodes should be placed under a woman’s breasts and not on top of them. d. Electrodes should be placed on the top of pantyhose and not underneath them. 19. Standard ECG speed is a. 5 mm per minute b. 25 mm per second c. 25 mm per minute d. 5 mm per second Page 42 of 46 20. Standard ECG calibration is a. 1 mm to 1 mV b. 1 mm to 1 Hz c. 10 mm to 1 mV d. 10 mm to 1 Hz 21. In a normal ECG, which one of the following waves is a negative deflection? a. P b. R c. S d. T 22. The Q wave represents the a. activation of the intraventricular septum b. depolarization and repolarization of the ventricle c. normal depolarization of the right and left atria d. ventricular repolarization stage 23. The PR interval is the time between a the beginning of the P wave to the end of the Rwave b. the end of the P wave to the end of the Rwave c. the beginning of the wave to the beginning of the QRS complex d. the end of the P wave to the end of the Q wave 24. Which of the following are associated with Wolff-Parkinson-White Syndrome? a. Fainting b. Shortened PR intervals C. Sudden cardiac arrest and death d. All of the above 25. There are 18 1-mm boxes between two QRS complexes. What is the heart rate in BPM? a. 12 b. 52 0.83 d. 97 26. Which of the following is a criteria used to determine if a heart rate is regular? a. Intervals between P waves must be the same b. Heart rate must be between 60 and 80 BPM C. P waves must follow the QRS complexes d. P waves must be higher than 2.5 mm in Leads II and III Page 43 of 45
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