ECG Interpretation & Heart Rate — NEET Biology
📚 Practice ConceptObviously, by counting the number of QRS complexes that occur in a given time period, one can determine the heart beat rate of an individual. Since the ECGs obtained from different individuals have roughly the same shape for a given lead configuration, any deviation from this shape indicates a possible abnormality or disease. Hence, it is of a great clinical significance.
What is the significance of counting QRS complexes in an ECG?
View solution & NCERT explanation
Correct answer: D — D Determines heart rate
The number of QRS complexes in a given time reflects the number of ventricular contractions, i.e., beats per minute.
What does NCERT say about Obviously by counting number?
Has this concept appeared in NEET?
Which chapter is this from?
Through deep analysis of NEET and NTA, 176 of the 180 ReNEET 2026 (June 21) questions were already in the MedicNEET question bank before the exam.
176/180MedicNEET's Biology question bank is built from the same NCERT lines NTA picks repeatedly. Not random MCQs — questions crafted exactly like NTA crafts them.