A left anterior fascicular block will have left axis deviation, Q waves in leads I and aVL and a small R in lead III, in the absence of left ventricular hypertrophy. This is a diagnosis of exclusion, after you have ruled out other causes of left axis deviation such as inferior infarction.See also: BBB/Hemiblocks
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This ECG is from a man in his 60s who presented with abdominal pain dyspnoea and altered level of consciousness, in shock.
This ECG shows wide complex tachycardia with concordant ST elevation in V4-6, due to LAD occlusion. The rhythm was likely sinus tachycardia with RBBB and then LAFB mid way through the trace.