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Old 01-02-2013
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Default Heart Block

As part of a physical exam required by his company’s health insurance provider, A 22-year-old man has an ECG and rhythm strip recorded. The rhythm strip tracing is shown below. Which of the following best describes this patient’s cardiac rhythm?


A. 2:1 second-degree atrioventricular (AV) block
B. First-degree AV block
C. Second-degree AV block, Mobitz type I
D. Second-degree AV block, Mobitz type II
E. Third-degree AV block
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Default mobitz 11

C ..mobitz 1.drop beats with lengthning of the PR interval?
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Default C. Second-degree AV block, Mobitz type I

C. Second-degree AV block, Mobitz type I
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C. Second-degree AV block, Mobitz type I
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C.................
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Answer----C
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There is a progressive lengthening of the PR interval before a drop beat (non-conducted P wave). This is characteristics of second-degree AB block, Mobitz type I.
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Old 01-03-2013
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Quote:
Originally Posted by Novobiocin View Post
As part of a physical exam required by his company’s health insurance provider, A 22-year-old man has an ECG and rhythm strip recorded. The rhythm strip tracing is shown below. Which of the following best describes this patient’s cardiac rhythm?


A. 2:1 second-degree atrioventricular (AV) block
B. First-degree AV block
C. Second-degree AV block, Mobitz type I
D. Second-degree AV block, Mobitz type II
E. Third-degree AV block
Would go with C, progressive lenghtening of PR interval with sudden drop of QRS (non conducted P ) is characteristic of 2nd degree HB, Mobitz type I
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