TI - Speckle-tracking strain assessment of left ventricular dysfunction in synthetic cannabinoid and heroin users AU - Demirkıran, A. AU - Albayrak, N. AU - Albayrak, Y. AU - Zorkun, C.S. SO - The Anatolian Journal of Cardiology 2018;19:388-393. DO - 10.14744/AnatolJCardiol.2018.76429