The ECGĀ Blog with Reid
Why Left Ventricular Hypertrophy Can Cause Secondary QRS Widening on the ECG
Jun 07, 2025
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Left ventricular hypertrophy (LVH) is most often recognized on ECG by increased QRS voltageā€”tall R waves in left-sided leads and deep S waves in right-sided leads. However, in some cases, LVH is also associated with a widened QRS complex, raising the question: Why would a structural enlargement of t...