Category Archives: Cardiovascular Block

I’ve been asked quite a bit about the effect of class I anti-arrhythmic drugs.  The three subclasses of these drugs have different effects but they share one thing in common:  they block Na channels. Na channels in ventricular and atrial cells … Continue reading →

I’m getting this one a lot: I have a question regarding #28 on one of your old exams: “If the AV node is destroyed then it is expected that…” I understand that “b) the ventricles will beat at a slower rate than … Continue reading →

I’ve been asked several times about question 27 on page 46 of the week 4 course notes.  The question asks about the steady state MAP during vigorous exercise.  The answer is that MAP is increased. The problem is that, as most of you will … Continue reading →

I’ve been asked several times about this because I put a question on the practice exam related to it. In retrospect, I wish that I hadn’t used the class IB as the example on this question and I will change … Continue reading →