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Patient
74-year-old man, severe cardiac failure due to primary cardiomyopathy;
Trace
Sinus activity with left atrial enlargement (widened P wave, wide negative component in V1); non-specific block (wide QRS > 120 ms, without the typical pattern of right bundle branch block or left bundle branch block);
Exergue
Non-specific intraventricular conduction delay corresponds to a widening of the QRS complex without the characteristic pattern of right or left bundle branch block; it is therefore a diagnosis of elimination.
This tracing corresponds to a non-specific intraventricular conduction delay pattern. This is a diagnosis of elimination in the presence of a wide QRS (> 120 ms) while not displaying the characteristics of a right bundle branch block or left bundle branch block.