Abstract
Prolonged QRS is characteristic of ventricular conduction disturbances: Bundle branch blocks Pre‐excitation conditions (e.g. WPW) Intraventricular block Ventricular arrythmias High QRS amplitudes are found in: Ventricular hypertrophy Ventricular conduction disturbances e.g. BBB’s, WPW Low QRS amplitudes are seen in: Pericarditis Myocarditis Hypothyroidism Normal newborns
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