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MED239 Chapter 15

QuestionAnswer
major coronary artery and vessel supply the inferior wall of the left ventricle Right main and right acute marginal branch
Analyze V5 and V6; measure and select the taller of the two views; and then measure from the isoelectric line up to the tip of the tallest R wave Step 2 in determining left ventricular hypertrophy
possible causes of left axis deviation obesity, left ventricular hypertrophy, pregnancy
pathologic Q wave It indicates tissue death and is defined as measuring 0.04 second and/or greater than or equal to one-third the height of the R wave in that lead tracing.
occurs when there is a reduction or interruption in blood flow and oxygen to the myocardium for a short period of time Myocardial ischemia
Analyze V1 and V2; measure and select the deeper QRS of the two views; then measure from the isoelectric line down to the tip of the deepest QS complex Step 1 in determining left ventricular hypertrophy
Which major coronary artery and vessel supply the septal wall of the left ventricle Left main and septal
Which major coronary artery and vessel supply the lateral wall of the left ventricle Left main and circumflex artery
Which major coronary artery and vessel supply the anterior wall of the left ventricle Left main and left anterior descending
Signs of myocardial ischemia may include ST segment depression and T wave inversion.
Signs of myocardial injury may include ST segment elevation.
most common sign on a 12-lead ECG that an infarction has occurred ST segment elevation.
What two views are referred to when determining electrical axis? I and aVF
determining axis deviation, if lead I and lead aVF both have predominantly positive QRS complexes, the patient has normal axis.
determining axis deviation, if the QRS complex in lead I is predominantly negative and the QRS in lead aVF is predominantly positive right axis deviation.
determining axis deviation, if lead I and lead aVF both have predominantly negative QRS complexes, the patient has extreme right axis deviation.
determining axis deviation, if the QRS complex in lead I is predominantly positive and the QRS in lead aVF is predominantly negative, the patient has left axis deviation.
MCOT Mobile cardiac outpatient Telemetry
Created by: user-1990156
 

 



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