It is characterized by a high P wave amplitude (P pulmonale), i.e. a height greater than 2.5 mm in inferior ECG leads (II, III, aVF); and greater than 1.5 mm in<unk>  sided precordial leads (V1, V2).
Right atrial enlargement
Left atrial enlargement
Atrial enlargement
Aortic unfolding
Overriding aorta
Left ventricular hypertrophy
Subpulmonic effusion
Cardiomegaly