Irene Gold Boards Part I Physiology Questions and Answers
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Course
Irene Gold
Institution
Irene Gold
Ventricular filling is ____% passive and ____% active
Ans- 80% passive
20% active from atrial contraction
SA node impulse to AV node is shown as what on an ECG?
Ans- P-R interval
At the end of diastole the right ventricle contains _______ amount of blood
Ans- 150ml
S1 =
S2 =
Ans- AV Valve...
On an ECG isovolumetric contraction is represented by
Ans- R
The AV node sends its impulse through the _______ into _______
, Ans- Bundle of His
Purkinje Fibers
The right Bundle of His is aka
Ans- Moderator Band
How much faster is the Purkinje system than the Av node?
What accounts for this speed increase?
Ans- 150x faster
Faster because increased number of intercalated discs and gap junctions
The first downward or negative projection that is normal on an ECG is the ____
second negative projection is
Ans- Q-wave - 1st
S-wave - 2nd
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