Pulmonary vasoconstriction (hypoxia, acidemia)
Destruction of pulmonary vasculature by emphysema, interstitial lung disease
Increased blood viscosity (sickle cell disease, polycythemia)
RVH
RV dilation
Cough
Dyspnea
Tachypnea
Hemoptysis
Syncope
Peripheral edema
Cyanosis
Cor pulmonale
Cardiovascular
Acute respiratory distress syndrome
ACS
High altitude pulmonary edema
Acute Valve Dysfunction
Constrictive pericarditis
Aortic Dissection