<unk>  <unk>  is a form of cardiomegaly, or heart enlargement. It can broadly be classified as either<unk>  atrial hypertrophy (RAH), overgrowth, or dilation, like an expanding balloon. Common causes include pulmonary hypertension, which can be the primary defect leading to<unk> , or pulmonary hypertension secondary to tricuspid stenosis; pulmonary stenosis or Tetralogy of Fallot i.e. congenital diseases; chronic lung disease, such as Cor Pulmonale. Other recognised causes are:<unk>  ventricular failure, tricuspid regurgitation, and atrial septal defect.
Right atrial enlargement
Left atrial enlargement
Atrial enlargement
Aortic unfolding
Overriding aorta
Left ventricular hypertrophy
Subpulmonic effusion
Cardiomegaly