4.3 - Elecrocardiograms Flashcards
1
Q
What does the P wave show?
A
Contraction of the atria. (atrial systole)
2
Q
What does the QRS wave show?
A
Contraction of ventricles (ventricular systole)
3
Q
What does the T wave show?
A
Relaxation of the ventricles
(diastole)
4
Q
To measure the length of one heart beat, what should you do?
A
Measure the distance between P waves between 2 heartbeats.
5
Q
What is it called if the heart rate drops below 60bpm?
A
Bradycardia
6
Q
What is it called if the heart rate increases above 100bpm?
A
Tachycardia
7
Q
What is an ectopic heartbeat?
A
An extra heartbeat that is not part of the hearts usual rhythm.
8
Q
What is atrial fibrillation?
A
When irregular waves of excitation pass over the atria this causes the atria to contract randomly and rapidly.
The heart cannot pump blood properly.
