What is the normal duration range for a QRS interval?

The normal duration range for a QRS interval is indeed 0.08 to 0.12 seconds. This interval represents the time it takes for electrical impulses to travel through the ventricles, initiating ventricular contraction. A QRS complex within this range indicates that the ventricles are depolarizing efficiently and the heart is functioning properly in terms of ventricular conduction.

A duration shorter than 0.08 seconds may suggest that the electrical impulses are being conducted through the ventricles too quickly, potentially due to an abnormal conduction pathway, while a duration longer than 0.12 seconds could indicate a delay in conduction, such as in the case of a bundle branch block. Thus, the range of 0.08 to 0.12 seconds is vital for identifying normal and abnormal cardiac function based on the ventricular depolarization time.