Determinants of high-sensitivity cardiac troponin T during acute exacerbation of chronic obstructive pulmonary disease: a prospective cohort study.
BACKGROUND
A high-sensitivity cardiac troponin T (hs-cTnT) concentration above the 99th percentile (i.e. 14 ng/L) is common during Acute Exacerbation of Chronic Obstructive Pulmonary Disease (AECOPD) and associated with increased mortality. The objective of the study was to identify factors associated with hs-cTnT levels during AECOPD.


METHODS
We included 99 patients with AECOPD on admission. As 41 patients had one or more repeat admissions, there were 202 observations in the final analysis. We recorded clinical and biochemical data, medication, spirometry, chest radiographs, and ECGs. The data were analysed for cross-sectional and longitudinal associations using ordinary least square as well as linear mixed models with the natural logarithm of hs-cTnT as the dependent variable.


RESULTS
Mean age at inclusion was 71.5 years, mean FEV1/FVC was 45%, and median hs-cTnT was 27.0 ng/L. In a multivariable model there was a 24% increase in hs-cTnT per 10 years increase in age (p < 0.0001), a 6% increase per 10 μmol/L increase in creatinine (p = 0.037), and a 2% increase per month after enrollment (p = 0.046). Similarly, the ratios of hs-cTnT between patients with and without tachycardia (heart rate ≥100/min) and with and without history of arterial hypertension were 1.25 (p = 0.042) and 1.44 (p = 0.034), respectively. We found no significant association between arterial hypoxemia and elevated hs-cTnT.


CONCLUSIONS
Age, arterial hypertension, tachycardia, and serum creatinine are independently associated with the level of hs-cTnT on admission for AECOPD.
Dept, of Medicine, Akershus University Hospital and Institute of Clinical Medicine, Akershus University Hospital, University of Oslo, Oslo, Norway. a.d.hoiseth@medisin.uio.no
Arne Didrik
AD
Høiseth
Torbjørn
T
Omland
Tor-Arne
TA
Hagve
Pål H
PH
Brekke
Vidar
V
Søyseth
D000208:Acute Disease; D000368:Aged; D000369:Aged, 80 and over; D003401:Creatine / Q000097:blood*; D003430:Cross-Sectional Studies; D004562:Electrocardiography; D005260:Female; D006801:Humans; D006973:Hypertension / Q000150:complications*; D016018:Least-Squares Analysis; D008137:Longitudinal Studies; D008297:Male; D008875:Middle Aged; D011446:Prospective Studies; D029424:Pulmonary Disease, Chronic Obstructive / Q000097:blood* / Q000150:complications / Q000503:physiopathology; D013610:Tachycardia / Q000150:complications*; D020107:Troponin T / Q000097:blood*
D020107:Troponin T; D003401:Creatine