30-60deg left axis detion-: (A) Left ventricular hyperophy, (B) Right ventricular hyperophy, (C) Aoic stenosis, (D) Left atrial enlargement
Answer is A. High QRS voltage is the hallmark of left ventricular hyperophy(LVH), although many young patients have high QRS voltage without real LVH. Other associated hints (albeit nonspecific) are left axis detion, left atrial enlargement, widening of the QRS, and strain (associated ST-T abnormalities Ref Harrison 20th edition pg 1435