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Body Fluids and Circulations
Question
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Assertion: The enlarged Q and R waves indicate myocardial infarction.

Reason: The QRS complex represents ventricular repolarisation.

  • If both assertion and reason are true and reason is the correct explanation of assertion.

  • If both assertion and reason are true but reason is not the correct explanation of assertion.

  • If assertion is true but reason is false.

  • If both assertion and reason are false.

Answer

C.

If assertion is true but reason is false.

The enlarged Q and R waves indicate a myocardial infarction (heart attack). QRS complex begins as small downward deflection (Q) and continues as large upright (R) and triangular wave ending as downward wave (S) at its base. It represents ventricular depolarisation (ventricular contraction).

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