Assessment of GIT Vasculopathy in SSc and Its Multisystem Correlations

\- Doppler Ultrasound (DUS) To evaluate the abdominal aorta and the 3 main splanchnic vessels: Celiac Trunk (CT) Superior Mesenteric Artery (SMA) Inferior Mesenteric Artery (IMA) An ultrasound examination will be performed after a fasting period of at least 8 hours by a single operator blinded to clinical features. For abdominal vessels, the following parameters were measured: caliber, thickness, echogenicity, peak systolic velocity (PSV), end diastolic velocity (EDV), reverse velocity (RV), mean velocity (MV), resistive index (RI), and pulsatility index (PI).