Lecture 3 Ch. 11 The normal Electrocardiogram Flashcards

Question 1

Q

How would an SA node abonormality show up on the ECG?

a. abnormal t wave
b. Small R-wave
c. not all
d. +ve Q-wave deflection?

Answer

A

C. not at all

Question 2

Q

the electracal activity of how many structures dont show up on the EKG? What are they?

Answer

A

5. 
SA &amp; AV node
Bundle of HIS
Bundle Branches 
Purkinji Fibers/ network

Question 3

Q

Hyperpolarization of you heart cells would have effect on BP, CO, and SV? - This would be caused by stimulation of which part of CNS

Answer

A

BP goes down as a result of
CO going down
SV is unaffected? ( Maybe slightly Increase as time for ventricular filling would increase?)
-> Parasym

Question 4

Q

Decreased permeability to sodium in the heart cells of the atria would affect HR, BP, and CO, SV how?

Answer

A

HR - decreases
CO - Decreases
BP - Decrease

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