The ECG shows right bundle branch block (RBBB) and left anterior fascicular block (LAFB) in a 60-year-old hypertensive man. RBBB is characterized by a wide QRS complex with a terminal R wave in lead V1 and slurred S wave in lead V6. LAFB presents with left axis deviation and rS waves in lead III. The combination of RBBB and LAFB on an ECG suggests ischemia, as LAFB is commonly seen in acute anterior wall myocardial infarctions supplied by the left anterior descending artery.