TEST BANK FOR 12 LEAD ECG IN ACUTE CORONARY SYNDROMES 3RD EDITION BY PHALEN

Chapter 02: Introduction to the 12-Lead ECG TRUE/FALSE 1. The point where the QRS complex and ST segment meet is called the ST-junction or J-point. ANS: T The point where the QRS complex and the ST segment meet is called the ST-junction or J-point. OBJ: Identify the J-point and ST-segment deviations. 2. If the wave of depolarization (electrical impulse) moves toward the positive electrode, the waveform recorded on ECG graph paper will be upright (positive deflection). ANS: T If the wave of depolarization (electrical impulse) moves toward the positive electrode, the waveform recorded on ECG graph paper will be upright (positive deflection). OBJ: N/A 3. When electrical activity is not detected on the ECG, a straight line is recorded called the "baseline" or "isoelectric line." ANS: T When electrical activity is not detected, a straight line is recorded. This line is called the baseline or isoelectric line. OBJ: N/A MULTIPLE CHOICE 1. The ECG does not provide information about: a. conduction disturbances. b. the presence of ischemic damage. c. electrical effects of medications and electrolytes. d. the mechanical (contractile) condition of the myocardium. ANS: D The ECG does not provide information about the mechanical (contractile) condition of the myocardium. To evaluate the effectiveness of the heart’s mechanical activity, the patient’s pulse and blood pressure are assessed. OBJ: Explain the purpose and limitations of electrocardiogram (ECG) monitoring. 2. Where is the negative electrode placed in lead II? a. Left arm b. Right arm c. Left leg d. Right leg