title: Heart rate variability for evaluating surgical stress and development of postoperative complications.
abstract: Heart rate variability (HRV) has recently been used to detect autonomic nerve tone, which is affected by various stresses. To test out hypothesis that HRV can determine surgical stress, we examined perioperative HRV in 30 patients with surgical treatment. Relations between HRV and factors of surgical stresses, such as duration of the operation, amount of blood loss at the operation, and developments of complications, were evaluated. Mean heart rate (HR) increased and other HRV indices decreased postoperatively. Most indices correlated significantly to the duration of the operation and amount of blood loss at the operation on postoperative day 1. Only the standard deviation of normal to normal RR intervals (SDNN) and HRV triangular index showed significantly low values in complicated patients. HRV measurement in the perioperative period showed a significant relation to surgical stress. The present results indicated that HRV may provide useful information with respect to surgical stress.
authors.affiliation: Department of Surgery, National Hospital Organization Takamatsuhigashi National Hospital 8, Otsu, Shinden, Takamatsu, Kagawa, Japan. ushiyamt@takamatu.hosp.go.jp
authors.forename: Takafumi
authors.initials: T
authors.lastname: Ushiyama
authors.forename: Takaaki
authors.initials: T
authors.lastname: Nakatsu
authors.forename: Shinichi
authors.initials: S
authors.lastname: Yamane
authors.forename: Hiroe
authors.initials: H
authors.lastname: Tokutake
authors.forename: Hisao
authors.initials: H
authors.lastname: Wakabayashi
authors.forename: Ken
authors.initials: K
authors.lastname: Ishimura
authors.forename: Hajime
authors.initials: H
authors.lastname: Maeta
mesh_terms: D000368:Aged; D016063:Blood Loss, Surgical; D013505:Digestive System Surgical Procedures / Q000706:statistics & numerical data*; D015716:Electrocardiography, Ambulatory; D005260:Female; D006339:Heart Rate; D006801:Humans; D008297:Male; D008875:Middle Aged; D019990:Perioperative Care; D011183:Postoperative Complications / Q000453:epidemiology*; D013312:Stress, Physiological / Q000503:physiopathology*