27/04/21

1

    

       Electrocardiograms

Measuring heart voltage

Picture credit: Shutterstock

27/04/21

2

    

       Electrocardiograms

Blood flow

ECG

27/04/21

3

    

       Electrocardiograms

Atria

P

ECG

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4

    

       Electrocardiograms

Ventricles

R

P Q S

ECG

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5

    

       Electrocardiograms

ECG trace

P Q

T

S

Another beat

R

ECG

27/04/21

6

    

       Electrocardiograms

frequency =  1 ÷ period

Heart rate

time

v

o

lt

a

g

e

period