COMPression of Left Main coRonary artEry in patientS With Pulmonary Arterial Hypertension aSymptomatIc fOr aNgina

"A coronary CT angiography will be used to study the relationship between the PA and the LMCA and 4 radiological patterns will be considered:~1. Normal: minimum distance between the two vessels\> 1 mm;~2. Proximity: distance between the two vessels ≤1 mm without displacement or stenosis of the LMCA;~3. Dislocation: dislocation of the LMCA by the main branch of the PA with a take-off angle \<60 ° (the take-off angle is defined by the angle formed by the perpendicular to the aortic valve ring and the longitudinal axis of the LMCA);~4. Compression: stenosis of the LMCA ≥50% due to extrinsic compression by the PA."