News
A premature atrial contraction (PAC) occurs when a focus in the atrium (not the SA node), generates an action potential before the next scheduled SA node action potential. There are four main ...
The extra atrial action potential causes the SA node to become refractory to generating its next scheduled beat. Thus, it must "skip a beat" and it will resume exactly 2 P-to-P intervals after the ...
Results that may be inaccessible to you are currently showing.
Hide inaccessible results
Feedback