Page 1 of 2: Q: Vagal stimulation can cause all except?

manipalguy · Credits: 15905 My Scrapbook

vagal stimulation can cause all except..
1.delayed A-V conduction
2.increased ventricular contraction.
3.increased atrial contraction
4.decreases heart rate

rajurantac · Credits: 2061 My Scrapbook

I think both 2& 3 ,because
vagal (parasympathetic) fibres are mainly distributed to atria (can't increase ventricular contractility )while sympathetic fibres are mainly distributed to ventricles.
So vagal stimulation causes -

1.decrease in heart rate.
2.decrease in atrial contractility.
3.decrease in conduction velocity.

seniors plz help.

Guest · Credits: 77773 My Scrapbook My Reading List 262569 Books

what do u say rxpg team.....???

binu2002 · Credits: 9270 My Scrapbook

The answer is 2,vagal stimulation does not cause increased ventricular contractility.

drsunu · Credits: 752 My Scrapbook

hi raju,,,,, vagal stimulation causes -

1.decrease in heart rate.
2.decrease in atrial contractility.
3.decrease in conduction velocity,,,,,,,, when they ask it can cause all except?
then the answer should be increased atrial contraction.
as i know vagal stimulation causes depression of SAN.
EXPLAIN

suneet · Credits: 6820 My Scrapbook

increased atrial contracton

wasem · Credits: 8592 My Scrapbook

ventricles escape from the vagal supply
i thnk u know the answer now!!!

drroshankumar · Credits: 535 My Scrapbook

vagal stimulation can cause decrease in atrial contractility. decrease in conduction velocity decrease in heart rate.

profmatrix · Credits: 143 My Scrapbook

i think vagal stimulation can affect the ventricles by decreasing it's force of contraction (-ve inotropic action).. but it can't increase contraction of it nor the atria

madridesta · Credits: 120 My Scrapbook

answer is 2

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