What is blood pressure?

  • A
    The pressure of blood on the heart muscle
  • B
    The pressure of blood exerted on the walls of arteries and veins
  • C
    The pressure of blood on the walls of veins only
  • D
    The pressure of blood on the walls of arteries only

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$ECG$ records:

In $ECG,$ $T$-wave represents:

In all the leads of $ECG$,all following are positive waves except

In the following diagrammatic representation of a standard $ECG$,the '$T$' wave represents:

How will you interpret an electrocardiogram $(ECG)$ in which the time taken in the $QRS$ complex is higher?

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