Home-Based Clinical Management of Cardiac Complications in Systemic Sclerosis

The goal of this observational pilot trial is to evaluate the feasibility of home monitoring for patients with systemic sclerosis-associated pulmonary arterial hypertension (SSc-PAH). The study will assess home-based measures that may help detect disease progression earlier and will also evaluate patient satisfaction, usability, and the impact on health-related quality of life. The study aims to answer: * How feasible is home monitoring in SSc-PAH patients in terms of adherence, technical feasibility, and validity of home-based measures? * How do home-based assessments compare to hospital-based assessments in detecting disease progression? * How do patients experience digital home monitoring? Participants will: * Use a digital platform (Zeen Health) for biweekly self-reporting of symptoms and physiological measurements. * Perform functional tests at home, including the 1-minute sit-to-stand test (1MSTS). * Wear the ECG247 Smart Heart Sensor for one week to monitor heart rhythm. * Collect and submit home blood samples every two weeks. * Attend two hospital visits (baseline and week 12) for clinical assessments, functional testing, pulmonary function tests, echocardiography, and routine blood sampling for clinical assessments. This 12-week study will assess the feasibility of home monitoring, as well as the validity and reliability of home-based measures. The findings will help design a future study aimed at integrating home-based assessments into routine clinical care.