TI  - A new approach to the measurement of heart rate in patients with chronic heart failure-Heart rate performance index:  an observational study
AU  - Akyüz, A.
AU  - Alpsoy, Ş.
AU  - Çayan  Akkoyun, D.
AU  - Güler, N.
SO  - The Anatolian Journal of Cardiology 2013;13:215-220.
DO  - 10.5152/akd.2013.066