Prevalence and predictors of myocardial ischemia by preoperative myocardial perfusion single photon emission computed tomography in patients undergoing noncardiac surgery oleh Abdelkareem Saleh Al-Oweidi, Hesham Albabtain, Suleiman M. Kharabsheh, Peter Kimme, Mahmoud Almustafa, Samer Seder, Mohamed Shoukri, Ahmed L. Fathala