title: Neutrophil/Lymphocyte Ratio Can Predict Postoperative Mortality in Patients with Chronic Thromboembolic Pulmonary Hypertension.
abstract: OBJECTIVE
  The aim of our study was to investigate clinical importance of neutrophil/ lymphocyte ratio in patients with Chronic thromboembolic pulmonary hypertension.
  
  
  METHODS
  125 consecutive patients with a diagnosis of Chronic thromboembolic pulmonary hypertension were operated pulmonary thromboendarterectomy in our center between February 2011 and August 2013. 106 patients included into the study due to limitations. The patients were classified into two groups as patients discharged alive (Group 1) and those dying in the hospital (Group 2). Baseline neutrophil/lymphocyte ratio level was measured by dividing neutrophil count to lymphocyte count.
  
  
  RESULTS
  84 patients (79%) were in Group 1, 22 patients (21%) were in Group 2. Patients with higher neutrophil/lymphocyte ratio in admission have a significantly higher mortality rate and postoperative pulmonary vascular resistance was found statistically significant variable to predict the mortality. Receiver operator characteristic (ROC) analysis revealed that using a cut-off point of 2.54, admission neutrophil/lymphocyte ratio predicts mortality. Also, correlation analysis showed a significant correlation between preoperative pulmonary vascular resistance and neutrophil/lymphocyte ratio.
  
  
  CONCLUSIONS
  The neutrophil/lymphocyte ratio level may be a useful and noninvasive biomarker for operative risk stratification for mortality after pulmonary thromboendarterectomy.
authors.affiliation: Department of Cardiovascular Surgery, Kartal Kosuyolu Training and Research Hospital, Istanbul, Turkey.
authors.forename: Mehmed
authors.initials: M
authors.lastname: Yanartas
authors.forename: Mehmet Emin
authors.initials: ME
authors.lastname: Kalkan
authors.forename: Akin
authors.initials: A
authors.lastname: Arslan
authors.forename: Serpil Gezer
authors.initials: SG
authors.lastname: Tas
authors.forename: Cengiz
authors.initials: C
authors.lastname: Koksal
authors.forename: Nural
authors.initials: N
authors.lastname: Bekiroglu
authors.forename: Bedrettin
authors.initials: B
authors.lastname: Yildizeli
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D019540:Area Under Curve; D004691:Endarterectomy / Q000009:adverse effects / Q000401:mortality*; D005260:Female; D017052:Hospital Mortality; D006801:Humans; D006976:Hypertension, Pulmonary / Q000097:blood / Q000175:diagnosis / Q000401:mortality / Q000503:physiopathology / Q000601:surgery*; D018655:Lymphocyte Count; D008214:Lymphocytes; D008297:Male; D008875:Middle Aged; D009504:Neutrophils; D010343:Patient Admission; D011183:Postoperative Complications / Q000097:blood / Q000401:mortality*; D011237:Predictive Value of Tests; D011651:Pulmonary Artery / Q000503:physiopathology / Q000601:surgery*; D011655:Pulmonary Embolism / Q000097:blood / Q000175:diagnosis / Q000401:mortality / Q000503:physiopathology / Q000601:surgery*; D012372:ROC Curve; D012189:Retrospective Studies; D018570:Risk Assessment; D012307:Risk Factors; D013997:Time Factors; D016896:Treatment Outcome; D014655:Vascular Resistance; D055815:Young Adult