[khanar]

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

 

[Seetal]

QT interval

 

[khanar]

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

 

[rasheed]

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-step-1-forum/1107-origin-qrs-complex-ecg.html

 

[silakan_isi]

Yup , PR interval maybe . . .

 

[radit]

it is PR interval... sure...

 

[ashishkabir]

I'd think it's PR too, as QT includes too many other things such as repolarisation...