ECG basics Flashcards
1
Q
define depolarisation
A
one cell can be the stimulus for depolarisation of the adjoining cells and so a wave of contraction passes through the cells
2
Q
Define repolarisation
A
is the depolarised cell returning to the resting position and getting ready for the next contraction
3
Q
what nervous sytems increase or decrease HR?
A
SNS- increases HR
PSNS- decreases HR
HR regulated by autonomic NS
4
Q
Ectopic focus definition
A
site that generates an ectopic beat
5
Q
Name some characteristics of a myocardical infarction
A
-ST segment elevation over area of damage
-ST depression in leads oppostie infarction
-Pathological Q waves
-Reduced R waves
-Inverted T waves
