<unk>  is usually associated with<unk>  atrial enlargement or<unk>  ventricular strain (deep ST inversions in leads V1-V3)
Dominant R in V1 >7mm
RSR in V1 with QRS < 0.12
Right ventricular hypertrophy
Right atrial enlargement
Left ventricular hypertrophy
Left atrial enlargement
Widened mediastinum
WPW
Cardiac hypertrophy and enlargement
RBBB