AIPMT MAINS2011Zoology-Circulatory System
AIPMT MAINS 2011 Zoology ECG MCQ Question
Type: MCQ-conceptual-Medium-Class 11
Given below is the ECG of a normal human. Which one of its components is correctly interpreted below?
A
Peak P and Peak R together – systolic and diastolic blood pressures
B
Peak P – Initiation of left atrial contraction only
C
Complex QRS – One complete pulse
D
Peak T – Initiation of total cardiac contraction
Correct Answer
Option C
Detailed Explanation
The P⁻wave represents depolarisation of atria, which leads to the contraction of both atria. QRS wave represents depolarisation of atria which initiates ventricular contraction. There is one ventricular contraction during one heart beat as heart beat rate is equal to pulse rate, so QRS complex represents one complete pulse.
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