scholarly journals Cardiac Troponin Assays With Improved Analytical Quality: A Trade‐Off Between Enhanced Diagnostic Performance and Reduced Long‐Term Prognostic Value

2020 ◽  
Vol 9 (23) ◽  
Author(s):  
Hilde L. Tjora ◽  
Ole‐Thomas Steiro ◽  
Jørund Langørgen ◽  
Rune Bjørneklett ◽  
Ottar K. Nygård ◽  
...  
Keyword(s):  
Myocardial Infarction ◽  
Cardiac Troponin ◽  
Area Under The Curve ◽  
The Novel ◽  
St Segment Elevation ◽  
Segment Elevation Myocardial Infarction ◽  
St Segment ◽  
European Society Of Cardiology ◽  
Rule Out

Background Cardiac troponin (cTn) permits early rule‐out/rule‐in of patients admitted with possible non–ST‐segment–elevation myocardial infarction. In this study, we developed an admission and a 0/1 hour rule‐out/rule‐in algorithm for a troponin assay with measurable results in >99% of healthy individuals. We then compared its diagnostic and long‐term prognostic properties with other protocols. Methods and Results Blood samples were collected at 0, 1, 3, and 8 to 12 hours from patients admitted with possible non–ST‐segment–elevation myocardial infarction. cTnT (Roche Diagnostics), cTnI (Abbott) (Abbott Diagnostics), and cTnI (sgx) (Singulex Clarity System) were measured in 971 admission and 465 1‐hour samples. An admission and a 0/1 hour rule‐out/rule‐in algorithm were developed for the cTnI (sgx) assay and its diagnostic properties were compared with cTnT ESC (European Society of Cardiology), cTnI (Abbott)ESC , and 2 earlier cTnI (sgx) algorithms. The prognostic composite end point was all‐cause mortality and future nonfatal myocardial infarction during a median follow‐up of 723 days. non–ST‐segment–elevation myocardial infarction prevalence was 13%. The novel cTnI (sgx) algorithms showed similar performance regardless of time from symptom onset, and area under the curve was significantly better than comparators. The cTnI (sgx)0/1 hour algorithm classified 92% of patients to rule‐in or rule‐out compared with ≤78% of comparators. Patients allocated to rule‐out by the prior published 0/1 hour algorithms had significantly fewer long‐term events compared with the rule‐in and observation groups. The novel cTnI (sgx)0/1 hour algorithm used a higher troponin baseline concentration for rule‐out and did not allow for prognostication. Conclusions Increasingly sensitive troponin assays may improve identification of non–ST‐segment–elevation myocardial infarction but could rule‐out patients with subclinical chronic myocardial injury. Separate protocols for diagnosis and risk prediction seem appropriate.

scholarly journals High-sensitivity cardiac troponin concentrations at presentation in patients with ST-segment elevation myocardial infarction

2020 ◽  
Vol 41 (Supplement_2) ◽  
Author(s):  
R Wereski ◽  
K.K Lee ◽  
S Smith ◽  
A.R Chapman ◽  
D Lowe ◽  
...  
Keyword(s):  
Myocardial Infarction ◽  
Acute Coronary Syndrome ◽  
Cardiac Troponin ◽  
High Sensitivity ◽  
Funding Source ◽  
St Segment Elevation ◽  
Coronary Syndrome ◽  
Segment Elevation Myocardial Infarction ◽  
St Segment ◽  
Rule Out

Abstract Background The widespread adoption of high-sensitivity cardiac troponin testing has encouraged the use of pathways to accelerate the rule-out and rule-in myocardial infarction in the Emergency Department. These pathways are not recommended for patients with ST-segment elevation, but there is a risk they may be applied incorrectly given that interpretation of the electrocardiogram is subjective, dependent on experience, and signs may be masked in those with posterior myocardial infarction. Methods Consecutive patients with suspected acute coronary syndrome were enrolled in a stepped-wedge cluster randomized controlled trial across ten hospitals in Scotland. The index diagnosis was adjudicated two clinicians independently in all patients with high-sensitivity cardiac troponin I concentrations above the sex-specific 99th centile on serial testing and abnormalities on the electrocardiogram recorded. The proportion of patients with ST-segment elevation myocardial infarction and concentrations below the rule-out threshold (<5 ng/L), 99th centile (<16 ng/L and <34 ng/L for women and men) and rule-in threshold (<52 ng/L) at presentation were determined. Results In total 48,282 patients were recruited between June 2013, and March 2016 of which 22% (10,360/48,282) had peak cardiac troponin concentrations above the 99th centile. The adjudicated diagnosis was type 1 myocardial infarction in 55% (4,981/9,115) of patients and 10% (925/9,115) had ST-segment elevation myocardial infarction (age 65 [14] years, 68% men). The majority presented within 6 hours of symptom onset (67%, 619/925), and 84% (772/925) had cardiac troponin concentrations above the 99th centile at presentation. However, troponin concentrations were below the rule-out threshold in 2% (20/925) and the rule-in threshold in 26% (240/925) of patients with ST-segment elevation myocardial infarction. Discussion In patients with suspected acute coronary syndrome who have a final diagnosis of ST-segment elevation myocardial infarction, high-sensitivity cardiac troponin concentrations are below the rule-out and rule-in threshold at presentation in 1 in 50 and 1 in 4 patients, respectively. Clinicians should not rely on cardiac troponin concentrations to guide initial treatment decisions in patients with possible ST-segment elevation myocardial infarction. Funding Acknowledgement Type of funding source: Foundation. Main funding source(s): British Heart Foundation

Hospital and long-term prognosis of patients with non-ST-segment elevation myocardial infarction

2008 ◽  
Vol 149 (45) ◽  
pp. 2115-2119 ◽  
Author(s):  
András Jánosi ◽  
Dániel Várnai ◽  
Zsófia Ádám ◽  
Adrienn Surman ◽  
Katalin Vas
Keyword(s):  
Diabetes Mellitus ◽  
Myocardial Infarction ◽  
St Segment Elevation ◽  
Segment Elevation Myocardial Infarction ◽  
St Segment ◽  
Long Term Prognosis

A szerzők 139, nem ST-elevációs infarktus miatt kezelt betegük adatait elemzik. Vizsgálják a betegek kórházi és késői prognózisát, egyes echokardiográfiás adatok prognózissal való összefüggését, valamint a kórházból elbocsátott betegek esetén a szekunder prevenció szempontjából ajánlott gyógyszeres kezelés gyakoriságát. Az utánkövetés a betegek 98%-ában sikeres volt, a bekövetkezett eseményekről, illetve az utánkövetés idején alkalmazott gyógyszeres kezelésről postai kérdőív útján szereztek adatokat. A nők átlagéletkora 78,6, a férfiaké 71,4 év volt. A kezelt betegeknél gyakori volt a társbetegségek (hypertonia, diabetes mellitus, korábbi ischaemiás szívbetegség) előfordulása. A kórházi kezelés időszakában 30 betegnél (22%) történt koronarográfia, és 29 betegnél revascularisatiós beavatkozásra is sor került. A kórházi halálozás 15% volt, az utánkövetés háromnegyed éve alatt 17%-os halálozást észleltek. A kórházban, illetve az utánkövetési idő alatt meghalt betegek szignifikánsan idősebbek voltak azoknál, akik életben maradtak. Egyes echokardiográfiás adatok (ejekciós frakció, végszisztolés átmérő, szegmentális falmozgászavar és a mitralis insufficientia nagysága) prognosztikus jelentőségűnek bizonyultak, mivel szignifikánsan különböztek az életben maradt és a meghalt betegek esetén. A kórházból elbocsátott betegek igen magas arányban részesültek a másodlagos prevenció szempontjából fontosnak ítélt gyógyszeres kezelésben (aszpirin, béta-blokkoló, ACE-gátló, statin). Az utánkövetés idején sem csökkent ezen gyógyszerek használatának aránya, ami a betegek jó compliance-ét igazolja.

Patient survival after acute myocardial infarction treated with primary percutaneous coronary intervention within the left main coronary artery according to time of admission

2020 ◽  
Vol 41 (Supplement_2) ◽  
Author(s):  
R Januszek ◽  
K Bujak ◽  
M Gasior ◽  
D Dudek ◽  
S Bartus
Keyword(s):  
Myocardial Infarction ◽  
Left Main Coronary Artery ◽  
Left Main ◽  
Night Time ◽  
St Segment Elevation ◽  
Segment Elevation Myocardial Infarction ◽  
St Segment ◽  
Coronary Syndromes ◽  
Overall Mortality

Abstract Background Previously published studies assessing the time effect of primary percutaneous intervention (PCI) on long-term clinical outcomes in an overall group of patients with acute coronary syndromes has been widely investigated. It has been suggested that night-time admission may negatively influence long-term overall mortality. Patients treated within the left main coronary artery (LMCA) belong a narrow group of high-risk procedures that require an operator and a team with high skills. Purpose The aim of the presented study was to assess the relationship between the time of pPCI (day- vs. night-time) and overall mortality among patients treated due to AMI within the LMCA. Methods This observational study was performed on 443,805 patients hospitalised due to non-ST segment elevation myocardial infarction (NSTEMI) or ST-segment elevation myocardial infarction (STEMI). Patients were prospectively enrolled between January 2006 and December 2018 in the ongoing Polish Registry of Acute Coronary Syndromes (PL-ACS). From the overall group of patients, the authors selected 5,404 patients treated within the LMCA. After taking exclusion criteria into consideration, the patients were divided according to time of PCI treatment: daytime hours (7:00 a.m.-10:59 p.m.) – 2,809 patients and night-time hours (11:00 p.m. - 6.59 a.m.) – 473 patients. Results Patients treated during night-time and daytime did not differ significantly in age (70.79 [61.52–79.73] vs. 69.73 [60.8–78.82] years, p=0.13) or gender – males (67.6% vs. 67.0%, p=0.79). Patients treated during daytime presented with significantly higher rate of STEMIs (67.2% vs. 49.9%) and lower rate of NSTEMIs (32.8% vs. 50.1%) in comparison to those treated during night-time (p<0.001). The 30-day and 12-month overall mortality rates were significantly greater among patients treated during night-time hours (20.3% vs. 14.9%, p=0.003) and (31.7% vs. 26.2%, p=0.001). Kaplan-Maier survival curves confirmed this relationship (p=0.001). Multiple regression analysis did not confirm that the time of pPCI (day- vs. night-time) is significantly related to survival (hazard ratio [HR]: 1.22; 95% confidence interval [CI]: 0.96–1.55, p=0.099). However, significance was achieved for the left ventricle ejection fraction (HR: 0.95; 95% CI: 0.94–0.95, p<0.001), systolic blood pressure on admission (HR: 0.995; 95% CI: 0.991–0.998, p=0.005), age (HR: 1.04; 95% CI: 1.03–1.05, p<0.001), the use of intra-aortic balloon counterpulsation (HR: 1.04; 95% CI: 1.03–1.05, p<0.001) and diagnosed peripheral artery disease (HR: 1.55; 95% CI: 1.2–2.01, p<0.001). Conclusions The time of pPCI (day- vs. night-time) in patients with AMI and treated within the LMCA is related to the overall 30-day and 12-month survival which is poorer in those treated during the night-time. However, this relationship was not confirmed by multiple regression analysis and was not found to be significant among other stronger predictors. Funding Acknowledgement Type of funding source: None

Evaluation of the 0 h/1 h high-sensitivity cardiac troponin T algorithm in diagnosis of non-ST-segment elevation myocardial infarction (NSTEMI) in Han population

2020 ◽  
Vol 0 (0) ◽  
Author(s):  
Chen Dongxu ◽  
Zhou Yannan ◽  
Yang Yilin ◽  
Yao Chenling ◽  
Gu Guorong ◽  
...  
Keyword(s):  
Cardiac Troponin ◽  
Troponin T ◽  
High Sensitivity ◽  
Cardiac Troponin T ◽  
Chinese Han ◽  
Han Population ◽  
St Segment Elevation ◽  
Segment Elevation Myocardial Infarction ◽  
St Segment ◽  
Rule Out

Abstract Objectives A rapid 0 h/1 h algorithm using high-sensitivity cardiac troponin T (hs-cTnT) for rule-out and rule-in of non-ST-segment elevation myocardial infarction (NSTEMI) is recommended by the European Society of Cardiology. We aim to prospectively evaluate the diagnostic performance of the algorithm in Chinese Han patients with suspected NSTEMI. Methods In this prospective diagnostic cohort study, 577 patients presenting to the emergency department with suspected NSTEMI and recent (<12 h) onset of symptoms were enrolled. The levels of serum hs-cTnT were measured on admission, 1 h later and 4–14 h later. All patients underwent the initial clinical assessment and were triaged into three groups (rule-out, rule-in and observe) according to the 0 h/1 h algorithm. The major cardiovascular events (MACE) were evaluated at the 7-day and 30-day follow-ups. Results Among 577 enrolled patients, NSTEMI was the final diagnosis for 106 (18.4%) patients. Based on the hs-cTnT 0 h/1 h algorithm, 148 patients (25.6%) were classified as rule-out, 278 patients (48.2%) as rule-in and 151 patients (26.2%) were assigned to the observe group. The rule-out approach resulted in a sensitivity of 100% and negative predictive value of 100%. The rule-in approach resulted in a specificity of 62.9% [95% CI (58.5–67.2%)] and positive predictive value of 37.1% [95%CI (31.3–42.8%)]. No MACE was observed in the rule-out group within 30-day follow-up. Conclusions The hs-cTnT 0 h/1 h algorithm is a safe tool for early rule-out of NSTEMI, while probably not an effective strategy for accurate rule-in of NSTEMI in Chinese Han population.

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