Short- and long-term individual variation in NT-proBNP levels in patients with stable coronary artery disease

2013 ◽  
Vol 422 ◽  
pp. 15-20 ◽  
Author(s):  
Anna M. Nordenskjöld ◽  
Håkan Ahlström ◽  
Kai M. Eggers ◽  
Ole Fröbert ◽  
Per Venge ◽  
...  
2013 ◽  
Vol 59 (2) ◽  
pp. 401-409 ◽  
Author(s):  
Anna M Nordenskjöld ◽  
Håkan Ahlström ◽  
Kai M Eggers ◽  
Ole Fröbert ◽  
Allan S Jaffe ◽  
...  

BACKGROUND A rise or fall of cardiac troponin is a prerequisite for the diagnosis of acute myocardial infarction. Defining significant changes requires knowledge of both biological and analytical variation. The short-term biological variation of cardiac troponin in healthy individuals is 3%–48%. However, healthy individuals may not be representative for patients in whom cardiac troponin measurement is often of clinical importance. Therefore, we studied the individual variation of cardiac troponin in patients with symptoms of stable coronary artery disease. METHODS Twenty-four patients scheduled for elective coronary angiography were included. Blood samples were drawn once at enrollment and serially at six 4-h intervals on the day before coronary angiography. Cardiac troponin was measured with hs-cTn assays from Abbott Laboratories (premarket cTnI assay) and Roche Diagnostics (Elecsys® cTnT assay with two different lots). RESULTS The short-term individual variation in cardiac troponin I (cTnI) was 14%, the reference change value (RCV) 49%, and RCV-log-normal (rise/fall) 54%/−35%. The corresponding values for cTnT were 7%, 23%, and 26%/−21%. The long-term variation for cTnI was 24%, RCV 69%, and RCV-log-normal (rise/fall) 97%/−49%. The corresponding values for cTnT were 11%, 32%, and 37%/−27%. CONCLUSIONS The short-term individual variation of cardiac troponin in patients with symptoms of stable coronary artery disease is similar to the biological variation previously demonstrated in healthy individuals. Our results suggest that a change in cardiac troponin concentrations of >50% can be used in attempting to diagnose acute myocardial injury. To detect significant long-term changes in cardiac troponin concentrations, larger changes will be required.


2021 ◽  
Vol 27 ◽  
Author(s):  
Emmanuel P. Vardas ◽  
Evangelos Oikonomou ◽  
Gerasimos Siasos ◽  
Panagiotis Theofilis ◽  
Polychronis Dilaveris ◽  
...  

: Potential sex-related differences in the periprocedural and long-term postprocedural outcomes of coronary angioplasty in patients with stable coronary artery disease have been studied thoroughly over the last few decades, to determine whether female sex should be regarded as an independent risk factor that affects clinical outcomes. Based on a significant number of observational studies and meta-analyses, sex has not yet emerged as an independent risk factor for either mortality or major cardiac and cerebrovascular events, despite the fact that in the early 1980s, for several reasons, female sex was associated with unfavourable outcomes. Therefore, it remains debatable whether female sex should be considered as an independent risk factor for periprocedural and long-term bleeding events. The pharmacological and technological advancements that support current coronary angioplasty procedures, as well as the non-delayed treatment of coronary artery disease in females have certainly lessened the outcome differences between the two sexes. However, females show fluctuations in blood coagulability through their lifetime and higher prevalence of bleeding episodes associated with the antithrombotic treatment, following transcatheter coronary reperfusion interventions. In conclusion, the clinical results of percutaneous coronary intervention in patients with stable coronary artery disease, during the periprocedural and long-term postprocedural periods, appear to show no significant differences between the two sexes, except for bleeding rates, which seem to be higher in females, a difference that mandates further systematic research.


2021 ◽  
Vol Publish Ahead of Print ◽  
Author(s):  
Abou-bakr Abbadi ◽  
Gilles Lemesle ◽  
Nicolas Lamblin ◽  
Christophe Bauters

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