heart

Question 1

what does p wave, PR interval and PR segment mean?

Answer 1

1. atrial depolarisation
2. distance between onset of p-wave and the onset of the QRS complex
3. slow impulse conduction through the atrioventricular node

Question 2

what does the QRS complex represent?

Answer 2

the depolarisation of the ventricles

Question 3

what does the ST segment and the T wave represent?

Answer 3

1. plateau phase of action potential

2. the rapid repolarisation of contractile cells