Introduction to ECG SEMESTER 1 With Questions And 100% SURE ANSWERS

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Introduction to ECG SEMESTER 1 With Questions And 100% SURE ANSWERS



Terms in this set (40)

An ECG is a simple test that can be used to check your
hearts rhythm and electrical activity.

What is an ECG
Graphical representation of the changes in the potential
difference across the myocardium over the course of the
cardiac cycle.

The electro/ chemical changes that cause myocardial
contraction are shown by the cardiac action potential
What is shown by the cardiac action potential?




Changes in potential difference occurs through the flow of ions through specialised ion channels
How does changes in potential difference occur?
in the cellular membrane and relatively freely through gap junctions.


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, For the myocyte ( muscle cell ) to contract the potential
difference across the cellular membrane MUST change
This question is about cardiac cellular conduction.
from negative to positive in relation to inside the cell.
What is needed or the myocyte to contract?

Na+ / Ca2+ outside and Cl- inside



Introduction to ECG SEMESTER 1




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