May Be Caused by

 Common

Bullous emphysema

Diffuse emphysema

Marked tricuspid insufficiency

Pseudotruncus arteriosus

Pulmonary atresia with intact ventricular septum

Pulmonary hypertension

Right ventricular failure

Tetralogy of Fallot

Tricuspid atresia

Tricuspid stenosis

Trilogy of Fallot

 Uncommon

Carcinoid syndrome

Cardiac tamponade

Cardiomyopathy

Compression of pulmonary artery

Diffuse pulmonary embolism

Ebstein anomaly

Hypoventilation

Hypovolemia

Mechanical obstruction of tricuspid valve

Mitral stenosis

Polyarteritis nodosa

Pulmonary artery coarctation

Pulmonary artery stenosis

Pulmonary valvular atresia

Renal cell carcinoma extending into right atrium

Right atrial myxoma

Severe pulmonary valvular stenosis

Trophoblastic embolic metastases

Uhl anomaly