Acta Medica Okayama 73巻 2号
2019-04 発行
Hayashi, Masao
Department of Anesthesiology and Resuscitology, Okayama University Hospital
Taniguchi, Arata
Department of Anesthesiology and Resuscitology, Okayama University Hospital
Kaku, Ryuji
Department of Anesthesiology and Resuscitology, Okayama University Hospital
Fujimoto, Shusaku
Okayama University Medical School
Isoyama, Satoshi
Department of Anesthesiology and Resuscitology, Okayama University Hospital
Manabe, Sei
Department of Anesthesiology and Intensive Care Medicine, National Cancer Center Hospital
Yoshida, Tsubasa
Department of Anesthesiology, Tottori Municipal Hospital
Suzuki, Satoshi
Department of Anesthesiology and Resuscitology, Okayama University Hospital
Shimizu, Kazuyoshi
Department of Anesthesiology and Resuscitology, Okayama University Hospital
Morimatsu, Hiroshi
Department of Anesthesiology and Resuscitology, Okayama University Hospital
Momota, Ryusuke
Department of Human Morphology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences
Tachycardia is common in intensive care units (ICUs). It is unknown whether tachycardia or prolonged tachycardia affects patient outcomes. We investigated the association between tachycardia and mortality in critically ill patients. This retrospective cohort study’s primary outcome was patient mortality in the ICU and the hospital. We stratified the patients (n=476) by heart rate (HR) as LowHR, MediumHR, and HighHR groups. We also stratified them by their durations of HR >100 (prolonged HR; tachycardia): MildT, ModerateT, and SevereT groups. We determined the six groups’ mortality. The ICU mortality rates of the LowHR, MediumHR, and HighHR groups were 1.0%, 1.5%, and 7.9%, respectively; significantly higher in the HighHR vs. LowHR group. The in-hospital mortality rates of these groups were 1%, 4.5%, and 14.6%, respectively; significantly higher in the HighHR vs. LowHR group. The ICU mortality rates of the MildT, ModerateT, and SevereT groups were 0.9%, 5.6%, and 57.1%, respectively. The mortality of the HRT=0 (i.e., all HR ≤ 100) patients was 0%. The in-hospital mortality rates of the MildT, ModerateT, and SevereT groups were 1.8%, 16.7%, and 85.7%, respectively; that of the HRT=0 patients was 0.5%. Both higher HR and prolonged tachycardia were associated with poor outcomes.
