less common signs/symptoms include non-productive cough and exercise-induced nausea and vomiting. coughing up of blood may occur in some patients, particularly those with specific subtypes of pulmonary hypertension such as heritable pulmonary arterial hypertension, eisenmenger syndrome and chronic thromboembolic pulmonary hypertension. pulmonary venous hypertension typically presents with shortness of breath while lying flat or sleeping (orthopnea or paroxysmal nocturnal dyspnea), while pulmonary arterial hypertension (pah) typically does not.