@article{doi:10.5152/akd.2013.066, author = {Akyüz, Aydın and Alpsoy, Şeref and Çayan Akkoyun, Dursun and Güler, Niyazi}, title = {A new approach to the measurement of heart rate in patients with chronic heart failure-Heart rate performance index: an observational study}, journal = {Anatol J Cardiol}, volume = {13}, number = {3}, pages = {215-220}, year = {2013}, doi = {10.5152/akd.2013.066}, note ={PMID: 23376649}, URL = {https://dx.doi.org/10.5152/akd.2013.066}, eprint = {https://dx.doi.org/10.5152/akd.2013.066} }