Role of copeptin in dual-cardiac marker strategy for patients with chest pain presented to ED.
OBJECTIVE
The objective of the study is to evaluate the role of copeptin in the diagnosis of acute coronary syndrome (ACS) and its role in dual-cardiac marker diagnostic strategy with troponin.


METHODS
A prospective cohort study was carried out from May 2012 to October 2012.


METHODS
The study was conducted at the emergency department (ED) of a public hospital in a cluster of Hong Kong.


METHODS
Patients aged at least 18 years presented with chest pain to ED who have intermediate or high likelihood of ACS were included. All patients had blood taken in the ED for copeptin and troponin I. The adjudicated diagnoses of ACS were made by 2 independent physicians based on the universal definition. Diagnostic characteristics were calculated. Receiver operating characteristic curves were created. Areas under the curves were compared for copeptin, troponin I, and dual-marker strategy with copeptin and troponin I.


RESULTS
A total of 637 patients were recruited. Seventy-eight had been diagnosed to be ACS. The negative predictive value of copeptin for ACS was 0.881 (0.849-0.907) compared with troponin I, 0.937 (0.913-0.956). The areas under the receiver operating characteristic curves of copeptin, troponin I, and dual-marker strategy were 0.68, 0.859, and 0.880, respectively.


CONCLUSIONS
Addition of copeptin to troponin does not have significant improvement of the diagnostic accuracy of ACS in patients presented with chest pain.
Department of Accident and Emergency Medicine, Tuen Mun Hospital, Hong Kong. Electronic address: ectlui@yahoo.com.hk.
Chun Tat
CT
Lui
Division of Cardiology, Department of Medicine and Geriatrics, Tuen Mun Hospital, Hong Kong.
Ho
H
Lam
Department of Accident and Emergency Medicine, Prince of Wales Hospital, Hong Kong.
Koon Ho
KH
Cheung
Department of Pathology, Tuen Mun Hospital, Hong Kong.
Sze Fai
SF
Yip
Department of Accident and Emergency Medicine, Tuen Mun Hospital, Hong Kong.
Kwok Leung
KL
Tsui
Department of Accident and Emergency Medicine, Tuen Mun Hospital, Hong Kong.
Chak Wah
CW
Kam
Division of Cardiology, Department of Medicine and Geriatrics, Prince of Wales Hospital, Hong Kong.
Ka Lung
KL
Chui
Division of Cardiology, Department of Medicine and Geriatrics, Tuen Mun Hospital, Hong Kong.
Ping Wa
PW
Yam
2nd Department of Cardiology, Zabrze, Silesian Medical University of Katowice, Katowice, Poland.
Beata
B
Morawiec
2nd Department of Cardiology, Zabrze, Silesian Medical University of Katowice, Katowice, Poland.
Damian
D
Kawecki
D054058:Acute Coronary Syndrome / Q000097:blood* / Q000175:diagnosis*; D000328:Adult; D000368:Aged; D000787:Angina Pectoris / Q000097:blood*; D015415:Biomarkers / Q000097:blood; D015331:Cohort Studies; D004636:Emergency Service, Hospital; D005260:Female; D006020:Glycopeptides / Q000097:blood*; D006723:Hong Kong; D006801:Humans; D008297:Male; D008875:Middle Aged; D011237:Predictive Value of Tests; D012372:ROC Curve; D019210:Troponin I / Q000097:blood*
D015415:Biomarkers; D006020:Glycopeptides; D019210:Troponin I; C048197:copeptins