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Old 04-07-2010
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Question CCB Effects on the EKG?

Calcium channel blockers are known to slow conduction through the atrioventricular node. Which of the following ECG components will be affected most?

A- PR interval
B- QRS amplitude
C- QRS width
D- Sinus rate
E- QT interval
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Old 04-07-2010
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QT interval
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Old 04-07-2010
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Am not sure but I think it's the PR interval because it represents conduction through the AV node.

There's was a nice thread explaining the ECG changes here in this forum but I cannot find it
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Old 04-07-2010
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Quote:
Originally Posted by Sarah-cali View Post
Am not sure but I think it's the PR interval because it represents conduction through the AV node.

There's was a nice thread explaining the ECG changes here in this forum but I cannot find it
I think you are referring to this thread
http://www.usmle-forums.com/usmle-st...mplex-ecg.html
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Old 04-07-2010
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Yup , PR interval maybe . . .
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Old 04-07-2010
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it is PR interval... sure...
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Old 04-07-2010
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I'd think it's PR too, as QT includes too many other things such as repolarisation...
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Cardiovascular-, EKGs-, Pharmacology-, Step-1-Questions

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