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AIIMS 2014
Exam
AIIMS
Year
2014
Subject
Zoology
Chapter
Body Fluids and Circulation

AIIMS 2014 · Zoology · Body Fluids and Circulation

Assertion : The enlarged Q and R waves indicate myocardial...

Assertion : The enlarged Q\mathrm{Q} and R\mathrm{R} waves indicate myocardial infarction. Reason: The QRS complex represents ventricular repolarisation.

Options

  1. AIf both assertion and reason are true and reason is the correct explanation of assertion.
  2. BIf both assertion and reason are true but reason is not the correct explanation of assertion.
  3. CIf assertion is true but reason is false.
  4. DIf both assertion and reason are false.

Correct answer

C. If assertion is true but reason is false.

Step-by-step solution

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