The most authoritative answer in 2024
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Charlotte Wilson——Studied at the University of Lagos, Lives in Lagos, Nigeria.
As a medical professional with expertise in cardiology, I can provide you with information on the normal QRS duration.
The normal QRS duration is typically between **0.06 to 0.10 seconds (60 to 100 milliseconds)** on an electrocardiogram (ECG). The QRS complex represents the depolarization of the ventricles, which is the initial phase of ventricular contraction. A QRS duration that falls outside of this range can indicate certain cardiac conditions or abnormalities.
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Benjamin Brooks——Works at the World Health Organization, Lives in Geneva, Switzerland.
The first measurement is known as the "P-R interval" and is measured from the beginning of the upslope of the P wave to the beginning of the QRS wave. ... The second measurement is the width of the QRS which should be less than 3 small squares, or less than 0.12 seconds in duration.read more >>
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