Value Of High-sensitivity Troponin Research Articles

Prognostic value of perioperative high sensitivity troponin in patients undergoing hip and knee arthroplasty

The authors conducted a prospective observational study to investigate the prognostic value of high-sensitivity Troponin I (hs-TnI) in the short- and long-term periods after orthopedic surgery, including Total Hip and Knee Arthroplasty (THA and TKA, respectively), in a tertiary orthopedic center in Brazil. Perioperative Myocardial Injury (PMI) was defined as an absolute increase in hs-TnI of ≥ 26 ng/L above preoperative values. The primary endpoint was all-cause mortality assessed at 30 days and 18 months after surgery. The secondary endpoint consisted of a composite outcome: cardiovascular death, acute myocardial infarction, angina requiring revascularization, and/or stroke. The authors compared Relative Risks (RR) of all-cause mortality and composite outcomes in patients with or without PMI at 30 days and 18 months. A Cox proportional hazards model for long-term outcomes was calculated and adjusted for age > 70 years, gender, and Revised Cardiac Risk Index (RCRI) class ≥ 2. PMI occurred in 3.4 % of all surgeries. At 30-days, 6.6 % of patients with PMI had died versus none without PMI. At 18 months, 20.0 % of PMI versus 4.7 % without PMI had died (RR = 5.0; 95 % Confidence Interval [95 % CI 1.3–19.3]). Based on composite outcomes in short and long-term periods, the RRs were 16.2 (95 % CI 2.7–96.5) and 7.7 (95 % CI 2.2–26.6), respectively. PMI was associated with all-cause mortality after 18 months and increased risk for a composite outcome (Hazard Ratio [HR = 3.97], 95 % CI 1.13–13.89 and HR = 5.80, 95 % CI 1.93–17.45, respectively). Patients with PMI who underwent THA or TKA presented worse short- and long-term prognoses compared to those without PMI.

Cardiac CARE study: How the ESC Cardio-Oncology guidelines fo 2022 affect the study population

Abstract Introduction The new 2022 ESC Guidelines in Cardio-Oncology focused on cancer therapy-related cardiac dysfunction (CT-RCD), with the formal introduction of biomarkers in the classification and risk stratification of CTR-CD in addition to structural imaging . We here, investigated how these changes affect the classification of patients in the Cardiac CARE study and the value of high sensitivity troponin I (hSTrop-I). Methods The Cardiac CARE study prospectively recruited 191 patients who underwent anthracycline therapy for breast cancer or non-Hodgkin’s lymphoma. All patients underwent regular hSTrop-I levels throughout their anthracycline therapy as well as a baseline and 6-month cardiac magnetic resonance scans including assessment of left ventricular ejection fraction and global longitudinal strain. A post-hoc analysis assessed the association between hSTrop-I and the development of cardiac dysfunction (defined as a reduction in left ventricular ejection fraction <50% or a reduction in GLS by >15%) using logistic regression with data corrected for age and gender. In addition, receiver operator curves (ROC) were drawn and area under the curve (AUC) analysis was performed to assess the value of hSTrop-I as an addition to the classification model. Finally, to compare our data with the new guidelines, a confusion matrix was performed. Results 11 patients were diagnosed as having cardiotoxicity in the Cardiac CARE study but using the 2022 ESC guidelines in Cardio-Oncology, 53 patients were re-classified into the ‘asymptomatic mild cardiotoxicity’ group (95% CI of 0.5162 and 0.6823; kappa value 0.157). Using a logistic regression model, a difference in hSTrop-I measured at the first cycle of anthracycline therapy had an odds ratio of 1.37 (95% CI 0.37-5.10) which when corrected for age dropped to 1.18 (95% CI of 0.28-5.01) and with combined age and sex correction, fell further, to 0.83 (95% CI of 0.12 and 5.56). A ROC analysis looking at the performance of hSTrop-I at predicting cardiac dysfunction demonstrated an area under the curve of 0.605 and when corrected for age and sex, was 0.640. Conclusion The addition of cardiac biomarkers to the new classification, significantly reclassified 53 of 191 (27.7%) of patients who were previously normal, to having asymptomatic mild cancer therapy-related cardiac dysfunction, mostly due to the inclusion of hSTrop I. HSTrop-I prior to anthracycline treatment was not a robust predictor of the development of anthracycline-induced cardiotoxicity in our cohort of patients. Of note, the Cardiac CARE patients are a low-risk group of patients and follow-up data is limited to 6 months.

High-sensitivity cardiac troponin-T concentrations and their prognostic implications in paroxysmal supraventricular tachycardia: A nationwide study

Abstract Introduction Paroxysmal supraventricular tachycardia (PSVT) may mimic symptoms and electrocardiographic findings compatible with acute coronary syndromes. As a result, cardiac troponin concentrations are frequently measured upon presentation. Although PSVT may increase troponin concentrations, the expected magnitude and prognostic clinical value of high-sensitivity troponin (hs-TnT) concentrations remain uncertain. Purpose The purpose of this study was to examine whether elevated hs-TnT concentrations in PSVT patients were associated with a higher risk of death from any cause. Methods We used Danish nationwide registry data from January 2013 through December 2019. PSVT was defined as all supraventricular tachycardias except atrial fibrillation and atrial flutter. The inclusion criteria were de novo PSVT and at least one measured hs-TnT level during hospitalization. Exclusion criteria were a history of cardiovascular disease (coronary artery disease, atrial fibrillation or flutter, or heart failure) or absence of hemoglobin or creatinine measurement within one day of the hs-TnT measurement. Elevated hs-TnT was defined as a value of ≥14 ng/l (the conventional 99th percentile upper reference limit). The primary outcome was death from any cause evaluated at 0-30 and 31-365 days, using multivariable Cox regression with average treatment effect, rendering standardized absolute and relative risks. Results A total of 1029 patients were included. Median age was 58 years (25th to 75th percentile: 45-71), and 45% were male. Elevated hs-TnT level was observed in 674 (65.5%) patients, who also had a higher prevalence of cardiovascular comorbidities. The median hs-TnT level was 16 ng/l (25th to 75th percentile: 10-35). The standardized mortality risk at 30 days was significantly higher in patients with elevated hs-TnT compared with patients with normal hs-TnT concentrations (2.38% [95% confidence interval (CI): 1.38 to 3.37] versus <0.01% [95% CI: <0.01 to <0.01]) (Figure 1). The relative risk was 58722906 (95% CI: 23126570 to 94319242), p = 0.001. At 31-365 days, the standardized risk of death was 1.51% (95% CI: 0 to 3.28) in individuals with a normal hs-TnT and 4.23% (95% CI: 2.81 to 5.66) in those with an elevated hs-TnT (Figure 2), resulting in a relative risk of 2.81 (95% CI: 0 to 6.32), p = 0.31. Conclusion In patients without prior cardiovascular disease, an elevated hs-TnT concentration during the first episode of PSVT was only associated with an increased early mortality risk. Long-term mortality was not affected by elevated hs-TnT.Figure 1Figure 2

Abstract 16287: Predictive Value of High Sensitivity Troponin T for Patients With Suspected Acute Coronary Syndromes Undergoing Invasive Coronary Angiography

Introduction: High sensitivity troponin T (hs-cTnT) assays are used to risk stratify patients with suspected acute coronary syndromes(ACS), but the predictive value of hs-cTnT in patients undergoing invasive coronary angiography (ICA) has not been well described. Hypothesis: Hs-cTnT levels at baseline and the delta change with serial sampling will correlate with the findings of ICA, and the diagnostic performance of hs-cTnT may be affected by patient specific variables. Methods: This is a retrospective study of 1,037 patients that presented to the emergency department with suspected ACS who had hs-cTnT measured and underwent ICA. We collected patient demographics, medical history and results of cardiac testing. Our primary endpoint was a diagnosis of obstructive coronary artery disease (CAD) defined as a stenosis > 70% or > 50% in the left main. We excluded cases of arrhythmias, cardiac arrests, or STEMI. Data analyzed using multivariate regression models. Results: We analyzed data from 728 patients with a mean age of 68 years old, 62.5% were male and 37.5% female. 312 patients were diagnosed with no obstructive CAD and 413 with obstructive CAD, of which 286 underwent PCI, 43 underwent CABG and 84 were medically managed. There were significant (p<0.001) differences in average baseline hs-cTnT levels between no obstructive CAD (78.8 ng/L) and obstructive CAD (201.1 ng/L) patients, but no significant difference in the 1 hour hs-cTnT delta (30.4 ng/L vs 33.3ng/L) or the 3 hour delta (56.4ng/L vs 66.6ng/L). Being male, White race, or having diabetes were independent predictors of obstructive CAD with odd ratios of 2.42 (95% CI 1.75-3.34), 1.64 (95% CI 1.12-2.41), and 1.47 (95% CI 1.05-2.06) respectively. Conclusion: In this study, elevated baseline hs-cTnT was predictive of obstructive CAD but trending hs-cTnT had no additionalpredictive value. Average baseline hs-cTnT for no obstructive CAD was higher than the manufacture suggested cutoff (52 ng/L) to identify myocardial injury. Baseline variables of sex, race and history of diabetes were predictive of obstructive CAD regardless of the hs-cTnT. Future analysis will determine whether specific hs-cTnT thresholds in these populations could improve hs-cTnT performance for the identification of obstructive CAD.

High sensitivity troponin I as a biomarker for cardiac allograft vasculopathy: Evaluation of diagnostic potential and clinical utility.

Cardiac allograft vasculopathy (CAV) limits long-term survival in heart transplant (HTx) recipients. The use of biomarkers in CAV surveillance has been studied, but none are used in clinical practice. The predictive value of high-sensitivity troponin I (hsTnI) has not been extensively investigated in HTx recipients. HTx patients undergoing surveillance coronary angiograms and enrolled in the Emory Cardiovascular Biobank had plasma hsTnI measured. CAV grade was assessed using ISHLT nomenclature. Multivariable cumulative link mixed modeling was performed to determine association between hsTnI level and CAV grade. Patients were followed for adverse outcomes over a median 10-year period. Kaplan-Meier survival analysis and Cox proportional hazard modeling were performed. Three hundred and seventy-two angiograms were analyzed in 156 patients at a median 8.9years after transplant. hsTnI levels were positively correlated with concurrent CAV grade after adjustment for age, age at transplant, sex, BMI, hypertension, diabetes, hyperlipidemia, estimated glomerular filtration rate, and history of acute cellular rejection (p=.016). In an adjusted Cox proportional hazard model, initial hsTnI level above the median (4.9pg/mL) remained a predictor of re-transplantation or death (hazard ratio 1.82; 95% confidence interval 1.16-2.90; p=.01). An elevated hsTnI level reflects severity of CAV and is associated with poor long-term outcomes in patients with HTx.

Prognostic value of high-sensitive troponin T in patients with severe aortic stenosis undergoing valve replacement surgery.

Aortic stenosis (AS) is a well-known cause of mortality. We aimed to assess the prognostic value of high-sensitive troponin T (hs-TnT) in symptomatic patients with severe AS and preserved left ventricular ejection fraction (LVEF) after surgical aortic valve replacement (AVR). The study recruited patients with severe symptomatic AS fulfilling the inclusion criteria in the period between April 2020 and February 2022. Comprehensive echocardiography was done. The following parameters were assessed: AS severity, LV mass index(LVMI), left atrium volume index(LAVI), and LVEF. E/e' and LVEF were calculated using the biplane method of Simpsons. Global longitudinal strain (GLS) was assessed by speckle tracking echocardiography. Peripheral blood samples were collected for hs-TnT measurement. All patients underwent surgical AVR. The patients were followed for the following 6months for major adverse cardiovascular events (MACE). MACE was defined as cardiac death, re-admission for congestive heart failure (CHF) and fatal arrhythmia. One hundred and eight patients (mean age = 58.7 ± 7.68years) with severe AS were recruited. Seventeen patients presented with MACE including 8 cardiac deaths. We divided the patients into two groups based on the normal hs-TnT values. The Kaplan-Meier curve revealed a statistically significant difference in MACE rate among troponin groups (log-rank test = 5.06, p = 0.025). There was significant difference between both groups regarding GLS with smaller GLS in negative hs-TnT group. In multivariate analysis, GLS and hs-TnT were significantly associated with MACE (p = 0.022 and < 0.01 respectively). The cutoff value of hs-TnT of 238.25 had a sensitivity of 70% and a specificity of 81% for predicting future MACE. There was a significant correlation between GLS and troponin (p < 0.001). hs-TnT is associated with bad short-term prognosis after AVR. hs-TnT and GLS could be significant predictors for future MACE in patients with severe symptomatic AS and preserved LVEF who underwent AVR. Elevated hs-TnT and impaired GLS could set an indication of early intervention in asymptomatic severe AS.

Population differences and high-sensitivity troponin values: a narrative review

Population differences and high-sensitivity troponin values: a narrative review

Relationship between quantitative value of High-sensitivity Troponin I and severity of CAD in patients with stable CAD

Relationship between quantitative value of High-sensitivity Troponin I and severity of CAD in patients with stable CAD

Prognostic Significance of High-Sensitivity Troponin T in Nonischemic Heart Failure with Reduced Ejection Fraction.

Cardiac biomarkers can help diagnose and predict heart failure prognosis. High-sensitivity troponin T has frequently been investigated in ischemic heart failure studies. However, the relation between high-sensitivity troponin T and mortality in nonischemic heart failure and its level indicating poor prognosis remain unclear. This study aimed to show whether high-sensitivity troponin T is a predictor of all-cause mortality and the cut-off value for high-sensitivity troponin T in patients with nonischemic heart failure with reduced ejection fraction. We included 249 nonischemic heart failure patients with left ventricular ejection fraction ≤ 40%, age ≥ 18 years, and high-sensitivity troponin T level known. Of the patients, 59.8% were male, 73.5% were New York Heart Association I or II, and the median age was 64. High-sensitivity troponin T value of the patients was 18 ng/L [inter-quartile range, 10-34]. The cut-off value of high-sensitivity troponin T for all-cause mortality was 21.5 ng/L, with 72.6% sensitivity and 69.9% specificity (area under the curve: 0.760, 95% CI: 0.692-0.828, P < 0.001). Patients were compared according to the 21.5 ng/L high-sensitivity troponin T cut-off value. At 30-month follow-up, all-cause mortality was 29.3%. According to the Kaplan-Meier analysis, the mortality rate was 14% in the high-sensitivity troponin T < 21.5 ng/L group, while the mortality rate was 50% in the high-sensitivity troponin T ≥ 21.5 ng/L group (P < 0.001, log-rank test). Baseline high-sensitivity troponin T was inde-pendently associated with all-cause mortality in nonischemic heart failure with reduced ejection fraction when adjusted for estimated glomerular filtration rate, hemoglobin, N-terminal pro-brain natriuretic peptide, body mass index, and left atrial diameter (hazard ratio: 1.012, 95% confidence interval: 1.003-1.020, P = 0.005). The high-sensitivity troponin T cut-off value was 21.5 ng/L to predict a worse prognosis in nonischemic heart failure with reduced ejection fraction. There was an independent association between high-sensitivity troponin T and all-cause mortality.

Assessment of Major Adverse Cardiac Events (MACE) and Arrhythmias in Patients with Large B-Cell Lymphoma Undergoing Anti-CD19 Chimeric Antigen Receptor T-Cell (CAR-T) Therapy: Impact of Baseline Cardiac Biomarkers

Introduction: Chimeric antigen receptor - T Cell (CAR-T) therapy is widely used for relapsed or refractory (r/r) large B-cell lymphoma (LBL), now with approval for second-line use. Cytokine release syndrome (CRS) is commonly seen after CAR-T therapy and can lead to increased cardiovascular circulatory demand. Additionally, the pro-inflammatory milieu from CAR-T cells can lead to coagulopathy, endothelial damage, and myocardial stunning which may lead to major adverse cardiac events (MACE) and/or cardiac arrhythmias. Recent single center and pharmacovigilance studies have reported increased risk of MACE as well as cardiac arrhythmias after CAR-T cell therapy (Steiner, et al and Goldman, et al), but there are no data describing the predictive value of high sensitivity troponin and NT-proBNP as biomarkers of adverse cardiovascular outcomes after CAR-T therapy. Methods: Data were collected through retrospective chart analysis from a patient registry of 71 r/r LBL patients who received commercial anti-CD19 CAR-T therapy at Cleveland Clinic from May 2018 to October 2020. Baseline serum high sensitivity-troponin and NT-proBNP were collected on the day of but prior to treatment (i.e. day 0). Cardiac toxicity was defined as a decrease in the left ventricular ejection fraction by 10% or occurrence of arrhythmia. MACE was defined as cardiovascular death, myocardial infarction, coronary revascularization, stroke, or hospitalization because of heart failure. Univariate and multivariate logistic analyses were performed to determine the impact of baseline clinical and laboratory parameters on the risk for developing MACE as well as cardiac arrhythmia. Results: Median age was 63 years [interquartile range (IQR): 54 to 69 years]. 68% were male. Full details of baseline characteristics are shown in the attached table. Baseline troponin was elevated above laboratory reference range in 82% of patients and baseline NT-proBNP was elevated in 58% of patients. Median follow up was 326 days from cellular infusion. Three of 71 patients (4%) developed MACE and 11 (15%) developed atrial/ventricular arrhythmias. Baseline troponin was elevated in two of the patients who developed MACE and baseline NT-proBNP was elevated in all three patients who developed MACE. All three occurrences of MACE were within 45 days of CAR-T infusion. In univariate analysis, baseline troponin was associated with a statistically significant increased risk of developing atrial arrhythmia after treatment but other known risk factors such as hypertension, obesity, and congestive heart failure were not. In multivariable analysis, baseline troponin was associated with an increased risk of developing atrial arrhythmia [OR 1.07, 95% CI (1.004-1.145), p=0.039]. Conclusions: In contrast to previous reports, we found a low rate of MACE in our patient population, possibly due to patient selection. However, 15.4% of patients developed atrial fibrillation, consistent with prior reports of elevated risk of arrhythmias. Baseline elevation in troponin was associated with an increased risk of subsequent atrial arrhythmia. Further data are needed to explore the predictive value of baseline NT-proBNP in predicting MACE. As CAR-T cell therapy is likely to increasingly take place in the outpatient setting, future prospective and validation studies may explore the use of baseline troponin to risk stratify patients.

Predictive value of high-sensitivity troponin for significant coronary artery disease in new-onset atrial fibrillation with rapid ventricular response.

High-sensitivity troponin-T (HS-cTnT) levels are often measured in patients presenting with atrial fibrillation (AF), with many subjected to unnecessary invasive assessments. The significance of a normal or mildly raised HS-cTnT in this context is poorly understood. This study aimed to determine the predictive value of HS-cTnT for significant coronary artery disease (CAD) in new AF with rapid ventricular response. We also compared the discriminative ability of HS-cTnT to suspected angina for significant CAD. We examined patients presenting with new AF to two tertiary Irish centers in a defined period. Those included had HS-cTnT taken at presentation and subsequent ischemic evaluation. Of 5350 cases screened for inclusion, 281 were deemed eligible. Of these, 148 and 133 patients had a positive and negative index HS-cTnT, respectively. Of those with negative HS-cTnT, 13 (9.8%) had significant CAD versus 51 (34.5%) with positive HS-cTnT (P < 0.001). Positive Hs-cTnT status remained significant upon multivariate analysis (OR, 2.9; 95% CI, 1.37-6.14; P = 0.005). A similar model where HS-cTnT was replaced with suspected angina produced an OR of 1.64 (95% CI, 0.75-3.59; P = 0.213). A logistic model determined optimal cutoff value for HS-cTnT to be less than 30 ng/l, producing a negative predictive value of 91.8% and area under the receiver operative curve of 83.36. HS-cTnT exhibits potential as an effective screening biomarker to predict nonsignificant CAD in new rapid AF, allowing more targeted and rationalized ischemic testing. HS-cTnT may also be a more accurate predictor of significant CAD than clinically suspected stable angina.Graphical abstract: http://links.lww.com/MCA/A540.

Cardiac safety analysis of anti-HER2-targeted therapy in early breast cancer

To evaluate the cardiac safety of anti-HER2-targeted therapy for early breast cancer; to investigate whether trastuzumab combined with pertuzumab increases cardiac toxicity compared with trastuzumab; to evaluate the predictive value of high-sensitivity Troponin (hs-TnI) and QTc for the cardiotoxicity associated with anti-HER2 targeted therapy in early breast cancer. A total of 420 patients with early-stage HER2-positive breast cancer who received trastuzumab or trastuzumab combined with pertuzumab for more than half a year in Tianjin Medical University Cancer Hospital from January 2018 to February 2021 were included. Left ventricle ejection fraction (LVEF), hs-TnI values, and QTc were measured at baseline and 3, 6, 9, 12 months. Cardiotoxicity was defined as a decrease in LVEF of at least 10 percentage points from baseline on follow-up echocardiography. Cardiotoxicity developed in 67 of the 420 patients (15.9%) and all patients had LVEF above 50% before and after treatment. The incidence of cardiotoxicity in trastuzumab and trastuzumab combined with pertuzumab was 14.3% and 17.9%, respectively (P > 0.05). Logistic regression analysis showed that age, coronary heart disease, left chest wall radiotherapy, and anthracyclines sequential therapy were independent risk factors for cardiotoxicity (P < 0.05). The value of hs-TnI and QTc at the end of treatment (12th month) were selected for ROC curve prediction analysis and the area under the ROC curve was 0.724 and 0.713, respectively, which was significantly different from the area of 0.5 (P < 0.05). The decrease of LVEF in the study was mostly asymptomatic, from the heart safety point of view, the anti-HER2 targeted therapy for early breast cancer was well tolerated. Trastuzumab combined with pertuzumab did not significantly increase cardiotoxicity. However, subgroup analysis suggests that in the presence of coronary artery disease (CAD) and sequential treatment with anthracene, trastuzumab and pertuzumab may increase the cardiac burden compared with trastuzumab. Hs-TnI and QTc may be useful in monitoring and predicting cardiotoxicity associated with anti-HER2 targeted therapy for early breast cancer.

High sensitivity troponin - Six hours is the magic number

BackgroundHigh sensitivity troponin assays have become widespread for emergency department evaluation of acute chest pain. We assessed if a high sensitivity troponin under the 99th percentile upper reference limit drawn at 6 h or greater from symptom onset could safely rule out acute coronary syndrome in patients who did not meet the rapid rule-out strategy. MethodsWe conducted a multicenter retrospective study examining emergency department patients with chest pain who did not meet rapid-rule out criteria and were admitted for further evaluation. Among these admitted patients, we assessed the rate of clinically relevant adverse cardiac events (death, cardiac or respiratory arrest, STEMI, or life-threatening arrhythmia) and NSTEMI in patients with high sensitivity troponin less than the 99th percentile value obtained after at least 6 h of chest pain. ResultsOut of 1187 patients admitted, we found 30 clinically relevant adverse cardiac events, all of which occurred in patients admitted for another compelling reason or ischemic ECG. 36 patients had an NSTEMI, of which 33 were identified with high sensitivity troponin greater than 99th percentile upper reference limit within 6 h of chest pain onset. This left 0 clinically relevant adverse cardiac events and 3 NSTEMI among the 429 patients with high sensitivity troponin less than the 99th percentile at 6 h and nonischemic ECG and no other compelling reason for admission. ConclusionThis study assessed patients with chest pain with high sensitivity troponin values between 3 ng/L and the 99th percentile upper reference limit after 6 h of chest pain and found that they have a low rate of clinically relevant adverse cardiac events and NSTEMI.

Prognostic value of high-sensitivity cardiac troponin I in patients with non-ischaemic heart failure: insights from China.

Evidence of the prognostic value of high-sensitivity troponin in patients with non-ischaemic heart failure (NIHF) is scarce. This study aimed to assess the predictive value of high-sensitivity cardiac troponin I (hs-cTnI) in NIHF patients. Hs-cTnI was measured at baseline in 650 NIHF patients admitted to the Heart Failure Center. The prognostic value of hs-cTnI was assessed based on a well-established model (including age, sex, New York Heart Association class, left ventricular ejection fraction, haemoglobin, sodium, estimated glomerular filtration rate, diabetes mellitus, treatment with angiotensin-converting enzyme inhibitors or angiotensin II receptor blockers, treatment with β-blockers, and NT-proBNP). During a median follow-up of 1036days, 163 patients died of various causes. In total, 46.92% of patients had high hs-cTnI (hs-cTnI >0.011ng/ml). Over a 3-year follow-up, patients with high hs-cTnI (>0.011ng/ml) had a 1.54 [95% confidence interval (95% CI) 1.11-2.15] fold higher all-cause mortality risk than those without. Increasing concertation of hs-cTnI was also associated with a 23.0% (95% CI 13-33%, per log2 increase) increment risk of all-cause mortality. The inclusion of hs-cTnI significantly improved the risk prediction and stratification of all-cause mortality (integrated discrimination improvement 1.58%, 95% CI 0.38-2.79%, absolute net reclassification improvement 23.41% 95% CI 4.52-44.49%, additive net reclassification improvement 27.8%, 95% CI 9.29-46.3%) of the well-established model. Hs-cTnI provides significant prognostic value and could further remarkably improve risk stratification and prediction capabilities in NIHF patients.

Protective Effect of Shexiang Baoxin Pill on Myocardial Ischemia/Reperfusion Injury in Patients With STEMI.

Background: There is no definite effect in the treatment of myocardial ischemia/reperfusion (I/R) injury in patients with acute ST-segment elevation myocardial infarction (STEMI). We evaluated the protective effect of Shexiang Baoxin Pill (SBP) on I/R injury in STEMI patients.Methods: STEMI patients were randomly divided into a primary percutaneous coronary intervention (PPCI) group (n = 52) and a PPCI + SBP group (n = 51). The area at risk of infarction (AAR) and final infarct size (FIS) were examined by single-photon emission computed tomography (SPECT). I/R injury was assessed using myocardial salvage (MS) and salvage index (SI) calculated from AAR and FIS.Results: The ST-segment resolution (STR) in the PPCI + SBP group was significantly higher than that in the PPCI group (p = 0.036), and the peak value of high-sensitivity troponin T (hsTNT) was lower than that in the PPCI group (p = 0.048). FIS in the PPCI + SBP group was smaller than that in the PPCI group (p = 0.047). MS (p = 0.023) and SI (p = 0.006) in the PPCI + SBP group were larger than those in the PPCI group. The left ventricular ejection fraction (LVEF) in the PPCI + SBP group was higher than that in the PPCI group (p = 0.049), and N-terminal pro-B type natriuretic peptide (NT-proBNP) level in the PPCI + SBP group was lower than that in the PPCI group (p = 0.048).Conclusions: SBP can alleviate I/R injury (MS and SI), decrease myocardial infarction area (peak value of hsTNT and FIS), and improve myocardial reperfusion (MBG and STR) and cardiac function (LVEF and NT-proBNP).

The predictive value of high-sensitive troponin I for perioperative risk in patients undergoing gastrointestinal tumor surgery.

BackgroundThe incidence of cardiovascular events in perioperative period of gastrointestinal tumor surgery cannot be ignored, and studies have shown that level of postoperative troponin is related to the postoperative risk of non-cardiac surgery. However, the relationship between pre-operative troponin levels and perioperative risk of gastrointestinal tumor surgery is unclear. Thus, we aimed to evaluate the value of high-sensitive cardiac troponin I (hs-cTnI) prior to gastrointestinal tumor surgery for perioperative risk assessment.MethodsIn this retrospective cohort study, 1259 patients who underwent gastrointestinal tumor surgery and had been tested for hs-cTnI on admission within 7 days prior to surgery were retrospectively recruited from January 2018 to June 2020. The primary combined endpoint including in-hospital all-cause mortality, acute myocardial infarction, cardiac arrest or ventricular fibrillation and acute decompensated heart failure. The secondary endpoint included total hospital stay and requirement of intensive care treatment.FindingsCompared with patients with normal hs-cTnI, those with elevated hs-cTnI (> 0·028 ng/ml) were more likely to experience the combined endpoint (28·2% versus 2·7%, P < 0·001) and there was also an increasing rate of in mortality in elevated hs-cTnI group (2·4% versus 0·3%, P = 0·057). The length of total hospital stay was significantly longer in patients with elevated hs-cTnI (24·8 ± 16·3 versus 19·5 ± 7·9, P = 0·003) and the number of patients requiring intensive care treatment was also higher (22·6% versus 4·2%, P < 0·001). The area under the ROC curve assessing hs-cTnI in predicting in-hospital mortality was 0·787 [95% confidence interval (CI) 0·612–0·963, P = 0·015] and for combined endpoint was 0·822 [95% CI 0·766–0·879, P < 0·001]. Hs-cTnI > 0·028 ng/ml was associated with significantly higher cardiovascular event rate in patients with the revised cardiac index ≤ 1. The positive likelihood ratio of hs-cTnI (> 0·028 ng/ml) for predicting combined endpoint reaches 10.5 in patients with Lee index = 0. In multivariate logistic analyses, hs-cTnI was one of the best predictors for the combined endpoint [odds ratio (OR) 5·924 (95%CI: 2·869–12·233), P < 0·001].InterpretationHs-cTnI provides powerful prognostic information for patients undergoing gastrointestinal tumor surgery, and therefore provides reliable prognostic information incremental to revised cardiac index.

Patients with acute respiratory distress syndrome due to pandemic Coronavirus disease 2019 (COVID-19)

We report on a case study of patients with Coronavirus disease 2019 (COVID-19). Evaluation of factors predicting outcome in patients with COVID-19 are very important. Both patients developed respiratory failure complicated by acute respiratory distress syndrome. Patients were intubated and invasively ventilated, underwent prone positioning and careful ventilation according to criteria for acute respiratory distress syndrome. In addition, biomarkers were daily evaluated including C-reactive protein, d-dimer and high-sensitive troponin T. Although treatment did not differ between patients, one patient survived whereas the other one died. The patient who survived had a faster onset of invasive ventilation with prone positioning, a lower maximal level of C-reactive protein and a lower value of high-sensitive troponin T. The use of mechanical ventilation in combination with a high PEEP and an early start of prone positioning in patients with severe ARDS may be beneficial. The values of C-reactive protein and troponin T levels seems to be predictive for the clinical course. Keywords: Coronavirus disease 2019; COVID-19; Troponin; C-reactive protein; Mechanical ventilation.

Distribution and prognostic value of high-sensitive troponin T measurement in patients with type 2 diabetes without cardiovascular disease

AimThe objective of this work was to define a value for the 99th percentile of high-sensitive troponin T and to evaluate the prognostic value of this biomarker in a population of patients with type 2 diabetes without a history of cardiovascular disease. MethodsIn this prospective, observational and analytic study, 482 patients with type 2 diabetes were enrolled. The patients were asymptomatic, with no history of cardiovascular events, renal insufficiency, or inflammatory or systemic disease. As events we considered a combined end point of major adverse cardiovascular events (MACE). Results94.9% of the patients had detectable troponin values, 20.7% of the patients had troponin values above the healthy population reference upper threshold (14pg/mL). The 99th percentile value for this patient population was 48pg/mL. Age, sex, the glomerular filtration rate and hypertension were associated with troponin values>14pg/mL. The incidence of MACE was 3.96 per 100 patients/year (p/y) between those with hs-TnT>14pg/mL and 1.07 per 100 p/y between those with hs-TnT≤14pg/mL (HR=3.78 CI95 1.49–9.58; p=0.005). ConclusionsThe 99th percentile value of troponin T in a population of patients with type 2 diabetes is 3-fold higher than the value proposed by the manufacturer for a healthy population. We also observed a significant difference in the distribution of troponin T values between men and women. This biomarker may be a valuable prognostic factor, since troponin T values above the reference upper threshold were associated with an increase in the risk of cardiovascular events in these patients.

The Predictive Value of High-Sensitive Troponin I for Perioperative Risk in Patients Undergoing Gastrointestinal Tumor Surgery

Background: The incidence of cardiovascular events in perioperative period of gastrointestinal tumor surgery cannot be ignored, and studies have shown that postoperative troponin is related to the postoperative risk of non-cardiac surgery. However, the relationship between pre-operative troponin levels and perioperative risk of gastrointestinal tumor surgery is unclear. Thus, we aimed to evaluate the value of high-sensitive cardiac troponin I (hs-cTnI) prior to gastrointestinal tumor surgery for perioperative risk assessment. Methods: 1259 patients who underwent gastrointestinal tumor surgery and had been tested for hs-cTnI on admission within 7 days prior to surgery were retrospectively recruited. The primary endpoint was in-hospital all-cause mortality and the combined endpoint including death, acute myocardial infarction, cardiac arrest and acute decompensated heart failure. The secondary endpoint included total hospital stay and requirement of intensive care treatment. Findings: Compared with patients with normal hs-cTnI (≤0.028ng/ml), those with elevated hs-cTnI were more likely to experience the combined endpoint (28·2% versus 2·7%, P < 0·001) and there was also an increasing rate of in mortality in elevated hs-cTnI group (2·4% versus 0·3%, P = 0·057). The length of total hospital stay was significantly prolonged in patients with elevated hs-cTnI (24·8 ± 16·3 versus 19·5 ± 7·9, P = 0·003) and the number of patients requiring intensive care treatment was also higher (22.6% versus 4.2%, P ＜0·001). The area under the ROC curve assessing hs-cTnI in predicting in-hospital mortality was 0·787 [95% confidence interval (CI) 0·612 - 0·963, P = 0·015] and for combined endpoint was 0·822 [95%CI 0·766 - 0·879, P ＜0·001], which was larger than revised cardiac index. Hs-cTnI＞0·028 ng/ml was associated with higher cardiovascular event rate according to the stratification of the revised cardiac index. In multivariate logistic analyses, hs-cTnI was the strongest independent predictor for the combined endpoint [odds ratio (OR) 7·454 (95%CI: 3·872-14·348); P < 0·001]. Interpretation: High sensitivity troponin I provides powerful prognostic information for patients undergoing gastrointestinal tumor surgery, and therefore provides strong prognostic information incremental to revised cardiac index. Funding: The Fundamental Research Funds for the Central Universities and the National Natural Science Foundation of China. Declaration of Interest: No potential conflict of interest was reported by the authors. Ethics Approval Statement: The study has been approved by the local ethical boards of the sixth affiliated hospital of Sun Yat-sen University.

Diagnostic Value of High-Sensitivity Troponin T for Subclinical Left Ventricular Systolic Dysfunction in Patients with Sepsis

Background Left ventricular systolic dysfunction (LVSD) is common in sepsis. Speckle-tracking echocardiography (STE) is a useful emerging tool for evaluating the intrinsic left ventricular systolic function. High-sensitivity cardiac troponin T (hs-cTnT) is the most sensitive biomarker of myocardial injury. However, there are limited data regarding the association between hs-cTnT level and left ventricular systolic dysfunction based on STE in septic patients. We performed this prospective study to evaluate the diagnostic value of hs-cTnT level for subclinical left ventricular systolic dysfunction measured by STE in septic patients according to the sepsis-3 definition. Methods Patients with sepsis based on sepsis-3 definition admitted to the intensive care unit were prospectively performed STE and hs-cTnT level within 24 hours after the onset of sepsis. Baseline clinical and echocardiographic variables were collected. Left ventricular systolic dysfunction was defined as a global longitudinal strain of ≥−15%. Results During a 19-month period, 116 patients were enrolled in the study. The elevated hs-cTnT level was seen in 86.2% of septic patients, and 43.1% of patients had LVSD on STE. The median hs-cTnT level and the proportion of elevated hs-cTnT level (>14 ng/L) were significantly higher in patients with LVSD than in patients without LVSD. The area under the ROC curves of hs-cTnT to detect LVSD was 0.73 (P < 0.001). In the multivariate analysis, hs-cTnT (HR, 1.002; 95% CI, 1.000 to 1.004; P = 0.025) and septic shock (HR, 7.6; 95% CI, 2.25 to 25.76; P = 0.001) were independent predictors of LVSD. Conclusion Our study indicated that the serum hs-cTnT level might be a useful biomarker for detecting LVSD in septic patients.