Subclinical Regional Myocardial Dysfunction Assessed by Two-Dimensional Speckle Tracking Echocardiography in Systemic Sclerosis Patients with Fragmented QRS Complexes - ÇİNÇİN, AHMET ALTUĞ; ÖZBEN SADIÇ, BESTE; ATAŞ, HALİL; SÜNBÜL, MURAT; DİRESKENELİ, RAFİ HANER (ELSEVIER SCIENCE INC, 2013)