Patient characteristics and scan-related parameters.

Standard deviation (SD); body mass index (BMI); beats per minutes (bpm); New York Heart Association functional classification (NYHA); NYHA Class I: No limitation of physical activity; NYHA Class II: Slight limitation of physical activity; Canadian Cardiovascular Society Angina Grading Scale (CCS); CCS Class I: Ordinary physical activity does not cause angina; CCS Class II: Slight limitation of ordinary activity; Left ventricular ejection fraction (LVEF). *: n, number of patients. **: The standard deviation of the heart rate in a given patient is the parameter used for heart rate variability measurement. ***: DLP, dose-length product of MDCT angiography.