What effects can be expected from parasympathetic stimulation of ...

[V@ndy87]

What effects can be expected from parasympathetic stimulation of the heart?
 
  What will be an ideal response?

Question 2

The QRS complex associated with a third-degree AV block is always wide.
 
  Indicate whether the statement is true or false

[IRincones]

Answer to Question 1

Parasympathetic stimulation has the following actions: it slows the rate of discharge of the SA node, slows conduction through the AV node, decreases the strength of atrial contraction, and can cause a small decrease in the force of ventricular contraction.

Answer to Question 2

F
The site of block in a third-degree AV block may be the AV node or, more commonly, the bundle of His or the bundle branches. A secondary pacemaker (either junctional or ventricular) stimulates the ventricles; therefore the QRS may be narrow or wide, depending on the location of the escape pacemaker and the condition of the intraventricular conduction system.

[V@ndy87]

Gracias!

[xiazhe]

Excellent