QRS Duration Unit Converter

QRS duration is a measurement on an electrocardiogram (ECG) that represents the time it takes for the electrical signal to spread through the ventricles, the heart's main pumping chambers.

Measured in milliseconds (ms), normal QRS duration is typically 70-100 ms, with values up to 110 ms sometimes seen in healthy individuals. A QRS complex of 120 ms or longer is considered prolonged and may indicate abnormal conduction through the ventricles.

The QRS complex appears as a series of spikes on the ECG tracing and reflects ventricular depolarization. Its width and shape provide important information about how electrical impulses travel through the heart's conduction system.

The QRS complex originates from the heart's specialized conduction system. Electrical impulses travel from the AV node through the bundle of His, then split into the right and left bundle branches before spreading through the Purkinje fibers to activate the ventricular muscle.