TY - JOUR TI - Assessment of the effects of frequent ventricular extrasystoles on the left ventricle using speckle tracking echocardiography in apparently normal hearts AU - Barutçu, A. AU - Bekler, A. AU - Temiz, A. AU - Kırılmaz, B. AU - Gazi, E. AU - Altun, B. AU - Özdemir, S. AU - Ulusoy Aksu, F. JO - The Anatolian Journal of Cardiology PY - 2016 VL - 16 SP - 48 EP - 54 DO - 10.5152/akd.2015.6166 ER -