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Author Question: Which of the following is the most characteristic electrocardiographic finding in myocardial ... (Read 14 times)

fasfsadfdsfa

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on: Jul 16, 2018
Which of the following is the most characteristic electrocardiographi c finding in myocardial in-farction?
 
  a. T wave inversion c. ST segment depres-sion
  b. ST segment eleva-tion d. Down-ward-deflected Q waves

Question 2

What is the heart rate depicted on the following electrocardiogram?
 
  a. 60 c. 100
  b. 80 d. 120


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bhavsar

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Reply #1 on: Jul 16, 2018
Answer to Question 1

ANS: D
When cardiac tissue fed by the left anterior descending and circumflex branches of the left cor-onary artery infarct, Q waves become abnormal most noticeably on the left precordial leads. As a result, the Q waves deflect downward instead of upward because of a lack of counterbalancing electrical forces on the affected side.

Answer to Question 2

ANS: B
Isolating 3 seconds out of the strip shows that there are 4 cardiac cycles in the 3-second period. Multiply 4 by 20. The heart rate is 80 beats/min.


fasfsadfdsfa

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Reply 2 on: Jul 16, 2018
Great answer, keep it coming :)

ashely1112

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Reply 3 on: Yesterday
:D TYSM

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