Symptom-related Screening for Early Detection of CTEPH.

"Intervention Investigator from each center will recover consecutives PE patients and collect baseline, demographic and comorbidities.~In all patients enrolled in the study a short questionnaire regarding dyspnea symptoms will be performed. All patients that refer dyspnea grade ≥ II according NYHA-WHO (6) modified scale will be cited as outpatient to be evaluated~Imaging studies and right heart catheterization is the procedure agreeing with the standard care according to current ESC/ERS Guidelines.~In all patients, the following tests will be performed:~1. Pulsioximetry.~2. Electrocardiogram.~3. Blood sample with determination of NT-ProBNP.~4. Echocardiography. Only an echocardiography indicative of PH warrants further evaluation~5. V/Q scintigraphy. Possible CTEPH can be assumed when mismatched perfusion defects are detected by VQ scan.~6. Right heart catheterization \& Pulmonary CT Scan are required for confirming the diagnosis"