Lab 7- ECG

Question 1

What is sampling rate?

Answer 1

The number of digital samples taken per second

Question 2

Steps in data aquisition

Answer 2

1. Mechanical signal captured by receiving device which transmits it as an analogue signal
2. Signal conditioning: PowerLab modifies it by amplifying and filtering
3. The analogue signal is sampled at regular intervals and converted to a digital signal to be sent to a computer

Question 3

What does the pulse transducer measure?

Answer 3

Pressure changes from contraction and relaxation of muscles

Question 4

What are the parts of the PQRST complex?

Answer 4

P wave- Atrial depolarisation
QRS complex- Ventricular depolarisation, atrial repolarisation
T wave- Ventricular repolarisation