Quiz 13 - 12 Lead Flashcards
Anatomically contiguous leads view:
A. only the anterior wall of the heart.
B. the same general area of the heart.
C. only the lateral wall of the heart.
D. opposite walls of the heart.
B. the same general area of the heart.
Lead I views the ________ wall of the heart, while lead aVF views the _________ wall of the heart.
A. septal, anterior
B. posterior, septal
C. lateral, inferior
D. anterior, inferior
C. lateral, inferior
A diagnosis of acute myocardial infarction is made if ST-segment __________ of ___ mm or more is seen in ___ or more contiguous leads.
A. elevation, 2, one
B. elevation, 1, two
C. depression, 2, one
D. depression, 1, two
B. elevation, 1, two
When applying the precordial leads, lead V1 should be placed in the:
A. fourth intercostal space at the left midclavicular border.
B. fifth intercostal space at the left midclavicular line.
C. fourth intercostal space at the right sternal border.
D. fourth intercostal space at the left sternal border.
C. fourth intercostal space at the right sternal border.
Injury to the inferior wall of the myocardium would present with:
A. pathologic Q waves in leads V4 and V5.
B. ST-segment depression in leads V5, V6, and aVL.
C. T-wave inversion in leads V1 through V4.
D. ST-segment elevation in leads II, III, and aVF.
D. ST-segment elevation in leads II, III, and aVF.
When viewing leads V3 and V4, you are looking at the _________ wall of the _________.
A. anterior, left ventricle.
B. septal, heart.
C. lateral, left ventricle.
D. inferior, right ventricle.
A. anterior, left ventricle.
Which of the following statements is correct?
A. Lead III is contiguous with leads II and aVF.
B. Lead V6 is contiguous with leads V4 and V5.
C. Lead II is contiguous with leads V6 and aVL.
D. Lead I is contiguous with lead II.
A. Lead III is contiguous with leads II and aVF.
Which of the following ECG abnormalities is MOST consistent with hyperkalemia?
A. Prolonged QT interval
B. Prominent U waves
C. Tall, peaked T waves
D. The presence of a J wave
C. Tall, peaked T waves
A pathologic Q wave:
A. generally indicates that an acute myocardial infarction has occurred within the past hour.
B. is wider than 0.04 seconds and indicates that a myocardial infarction occurred in the past.
C. is deeper than one quarter of the height of the R wave and indicates injury.
D. can only be substantiated by viewing at least two previous 12-lead ECGs
B. is wider than 0.04 seconds and indicates that a myocardial infarction occurred in the past.
A right ventricular infarction is characterized by:
A. ST-segment depression greater than 2 mm in lead V4R and ST-segment elevation in leads II, III, and aVF.
B. ST-segment elevation greater than 2 mm in lead V5R and ST-segment elevation in leads II, III, and aVF.
C. ST-segment elevation greater than 1 mm in lead V5R and ST-segment depression in leads II, III, and aVF.
D. ST-segment elevation greater than 1 mm in lead V4R and ST-segment elevation in leads II, III, and aVF.
D. ST-segment elevation greater than 1 mm in lead V4R and ST-segment elevation in leads II, III, and aVF.
The precordial leads do NOT view the __________ wall of the heart.
A. anterior
B. septal
C. lateral
D. inferior
D. inferior
If the ECG leads are applied correctly, the PQRST configuration should be inverted in lead:
A. I.
B. aVL.
C. aVR.
D. II.
C. aVR.
Fibrinolysis may be contraindicated in all of the following, EXCEPT:
A. a history of structural central nervous system disease.
B. major trauma or surgery within the past 4 weeks.
C. significant closed head trauma within the past 3 weeks.
D. a history of anaphylactic shock caused by salicylates.
D. a history of anaphylactic shock caused by salicylates.
Patients who are experiencing an infarction of the right ventricle:
A. may present with significant hypotension.
B. should not be given IV fluid boluses.
C. are usually hypertensive and tachycardic.
D. often require high doses of nitroglycerin.
A. may present with significant hypotension.
The inferior wall of the left ventricle is supplied by the:
A. right coronary artery.
B. left coronary artery.
C. left anterior descending artery.
D. circumflex artery.
A. right coronary artery.
