HUMAN PHYSIOLOGY
BODY FLUIDS AND CIRCULATION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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At QRS complex
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At T wave
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Between QRS complex and T wave
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Between P and QRS complex
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Detailed explanation-1: -The QRS complex is the main spike seen in the standard ECG. It is the most obvious part of the ECG, which is clearly visible. The QRS complex represents the depolarization of ventricles. It shows the beginning of systole and ventricular contraction.
Detailed explanation-2: -The QRS complex corresponds to the largest wave, since it represents the depolarization of the right and left ventricles, being the heart chambers with substantial mass.
Detailed explanation-3: -The QRS complex is larger than the P wave because it represents the contraction of the ventricles. The P wave represents the contraction of the atria which are smaller structures compared the ventricles and thus have a smaller wave readout on the EKG.
Detailed explanation-4: -The amplitudes of all the QRS complexes in the precordial leads are < 10 mm.