Exploring the Impact of Fragmented QRS on Ejection Fraction and Other Echocardiographic Parameters in Systemic Sclerosis Patients: A Retrospective Cohort Study - Mohamadi, Aida; Tamartash, Zahra; Nayebirad, Sepehr; Gharibdoost, Farhad; Javady Nejad, Zahra; Majidi Shad, Maedeh; Hatami, Motahare; Kavosi, Hoda (The Research in Heart Yield and Translational Medicine (RHYTHM), 2025)