Intermediate
Technical
IVT
QRS widening
Abnormal prolongation of the QRS complex duration beyond normal limits on an electrocardiogram. Indicates delayed ventricular conduction.
Full Definition
QRS widening refers to an abnormal increase in the duration of the QRS complex on an electrocardiogram, typically defined as greater than 120 milliseconds in adults. This finding indicates delayed electrical conduction through the ventricles and can suggest various cardiac pathologies including bundle branch blocks, ventricular hypertrophy, or electrolyte disturbances. The degree and pattern of QRS widening provides important diagnostic information for cardiologists.
Usage
Usage note: Always specify the QRS duration in milliseconds when documenting QRS widening.
In Context
- "The patient's ECG demonstrated significant QRS widening consistent with left bundle branch block." — Cardiology consultation note
- "Progressive QRS widening was noted on serial electrocardiograms during the hospitalization." — Medical record documentation
Also known as
QRS prolongation
widened QRS complex
Contrasted with
narrow QRS
normal QRS duration
Don't confuse with
QT prolongation
PR prolongation