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Plz solve Q no. 8

Plz solve Q no. 8 Which From which QRS signal initiates ? Give s i

Dear Student

a. Yes, it represents ECG of normal healthy person.

b. QRS represents depolarisation of ventricles.

c. SA node

e. ECG refers to Electrocardiogram. An electrocardiogram is a permanent record of the electric events that occur during a cardiac cycle. It is recorded on a graph paper in the form of wave.

*please post separately for rest of the questions. 

Regards

 

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Answer is 1) Yes 2) It represents the spreading of impulse from SA node to AV node , then bundle of His and Purkinje fibres . 3) SA nodes 4) The heart beat originates in modified cardiac muscles called Sinoatrial node (SA node ) which lies in the wall of right atrium near the opening of superior venacava 5) The SA node is called pace maker because it has the power of generation of wave of contraction .
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