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Editor-in-chief
Maria Stella Graziani

Deputy Director
Martina Zaninotto

Associate Editors
Ferruccio Ceriotti
Davide Giavarina
Bruna Lo Sasso
Giampaolo Merlini
Martina Montagnana
Andrea Mosca
Paola Pezzati
Rossella Tomaiuolo
Matteo Vidali

International Advisory Board Khosrow Adeli Canada
Sergio Bernardini Italy
Marcello Ciaccio Italy
Eleftherios Diamandis Canada
Philippe Gillery France
Kjell Grankvist Sweden
Hans Jacobs The Netherlands
Eric Kilpatrick UK
Magdalena Krintus Poland
Giuseppe Lippi Italy
Mario Plebani Italy
Sverre Sandberg Norway
Ana-Maria Simundic Croatia
Tommaso Trenti Italy
Cas Weykamp The Netherlands
Maria Willrich USA
Paul Yip Canada


Publisher
Biomedia srl
Via L. Temolo 4, 20126 Milano

Responsible Editor
Giuseppe Agosta

Editorial Secretary
Andrea di Bello
Biomedia srl
Via L. Temolo 4, 20126 Milano
Tel. 0245498282
email: biochimica.clinica@sibioc.it

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ISSN print: 0393 – 0564
ISSN digital: 0392- 7091



Articoli con TAG: troponine cardiache

Al “cuore” del quadro clinico di COVID-19
To the “heart” of the clinical picture of COVID-19
<p>Several studies document cardiac involvement in COVID-19 patients, as evidenced by cardiac biomarkers elevation. Hospitalized patients with cardiac involvement have a poorer prognosis, in terms of need for intensive care unit, or mortality. This paper provides a review of the wealth of literature on heart involvement in COVID 19. The majority of the available papers reports data from the Chinese experience and it is not clear at the moment whether the observations are related to really different populations of patients. The mechanism of the cardiac injury is likely multifactorial. There could be direct myocardial damage by the virus, but the few heart histologic specimens available do not evidence the presence of virus RNA in myocytes. The infection in the lungs may produce a cytokine storm which in turn could damage myocytes. Coagulation system is also affected by COVID-19: D-dimer is increased, while platelets are reduced in most studies, and both parameters relate directly with the risk of death. These alterations are probably the cause of the many cases of pulmonary embolism, venous thromboembolisms, and arterial embolism reported. Hypertension and previous cardiovascular diseases are also likely involved in the severity of the observed cardiac injury. Although all these mechanisms may play a role in cardiac involvement, the severe lung infection alone could justify cardiac damage, due to the simultaneous reduced supply and increased demand of myocardial oxygen. We still know very little about this new viral disease, but as knowledge is accumulating, the medical community will pinpoint the mechanism of cardiac involvement and find the optimal strategy to prevent its severe consequences.</p>
Biochimica Clinica ; 44(4) 019-020
COVID-19 - COVID-19
 
Biomarcatori cardiaci: dove stiamo andando?
Cardiac biomarkers: where are we going?
<p>The measurement of cardiac troponins (cTn) is recommended by all guidelines as the gold standard for the detection of differential myocardial injury and acute myocardial infarction (AMI). In this article, some key issues regarding both analytical characteristics of the high-sensitivity methods for cTn, which are still considered controversial or unresolved are discussed in details. These issues have been included in the activities of the Joint Working Group on &ldquo;Cardiac Biomarkers&rdquo; of the Italian Society of Clinical Biochemistry and the Italian branch of the European Ligand Assay Society. The major clinical concern regarding hs-cTn methods is the difficulty to differentiate the pathophysiological mechanism responsible for biomarker release from cardiomyocytes after reversible or irreversible injury, respectively. High-sensitivity cTnI and cTnT methods (hs-cTn) enable to monitor myocardial renewal and remodelling, and to promptly identify patients at highest risk of heart failure. In addition, several studies demonstrated that the cardiovascular risk progressively increases in the general population even for hs-cTn values well below the 99th percentile, i.e. the recognized cut-off for the detection of myocardial injury and diagnosis of AMI. An early and effective treatment of individuals at higher cardiovascular risk may revert the initial myocardial remodelling and slow down heart failure progression. Finally, recent studies support the working hypothesis that a new generation of hs-cTn methods should be set up based on monoclonal antibodies, specific for circulating peptide forms more characteristics for reversible rather than irreversible myocardial injury. Of course, screening programs of cardiovascular risk stratification and prevention strategies using hs-cTn methods require further investigation to define the optimal target populations, timing of measurement, and preventive interventions.</p>
Biochimica Clinica ; 45(1) 068-074
Documenti - Documents
 
Valutazione precoce del danno cardiaco da farmaci chemioterapici: importanza della misura delle troponine cardiache I e T con metodi ad alta-sensibilità analitica
High-sensitivity cardiac troponin I and T methods for the early detection of myocardial injury in patients on chemotherapy
<p>Important advances achieved in pharmacological cancer treatment have led progressively to a reduction in mortality from many forms of cancer, and increasing numbers of previously incurable patients can now hope to become cancer-free. Yet, to achieve these improved outcomes a high price has been paid in terms of untoward side effects associated with treatment, cardiotoxicity in particular. Several recent studies have reported that cardiac troponin assay using high-sensitivity methods (hs-cTn) can enable the early detection of myocardial injury related to chemotherapy or abuse of drugs that are potentially cardiotoxic. Several authors have recently suggested that changes in hs-cTn values enable the early diagnosis of cardiac injury from chemotherapy, thus potentially benefitting cancer patients with increased troponin values by initiating early cardioprotective therapy. However, large randomised clinical trials are needed in order to evaluate the cost/benefit ratio of standardised protocols for the early detection of cardiotoxicity using the hs-cTn assay in patients treated with chemotherapy.</p>
Biochimica Clinica ; 44(3) 279-286
Documenti SIBioC - SIBioC Documents
 
Le troponine I e T sono biomarcatori cardiaci interscambiabili?
Are troponin I and T interchangeable biomarkers?
<p>The most recent international guidelines recommend that high-sensitivity (hs) methods should be preferred for the measurement of cardiac troponin I (cTnI) and T (cTnT) for the detection of myocardial injury and the differential diagnosis of acute coronary syndromes. Furthermore, these guidelines state that there is no significant difference in accuracy among hs cTnI and cTnT methods for diagnosis of acute myocardial infarction. Myocardial injury is a prerequisite for the diagnosis of acute myocardial infarction, but it is also a distinct entity. The 2018 Fourth Universal Definition of Myocardial Infarction states that myocardial injury is detected when at least one value above the 99th percentile upper reference limit is measured in a patient by high-sensitivity methods for cTnI or cTnT. Occasionally, discrepancies between hs-cTnI and hs-cTnT test results can be found, when tested in the same blood sample. Several studies have reported discrepancies between hs-cTnI and hs-cTnT test results in some clinical conditions (especially chronic neuromuscular diseases) or even in apparently healthy subjects. This review, summarizes and discusses the biochemical, pathophysiological and analytical possible mechanisms causing discrepancies between hs-cTnI and hs-cTnT test results.</p>
Biochimica Clinica ; 44(2) S008-S016
Rassegne - Reviews
 
La misura combinata dei biomarcatori cardio-specifici è utile nei pazienti con sospetto di malattie cardiovascolari
The combined measurement of cardio-specific biomarkers is a useful tool in patients with suspected cardiovascular disease
<p>A huge amount of experimental and clinical evidences clearly demonstrate that the measurement of cardio-specific biomarkers [cardiac natriuretic peptides (CNP), and cardiac troponins (cTns)] can significantly and independently improve the diagnostic accuracy and risk stratification in cardiovascular diseases. Furthermore, several recent studies report that the measurement of cardio-specific biomarkers has a beneficial impact also on management and outcome of patients with cardiovascular diseases. Considering the significant and independent information associated to cardio-specific biomarkers, several studies have recently reported that the combined assay of CNP and cTns may be cost effective not only for diagnosis, prognosis and treatment of cardiac disease, but also for screening in general population of individuals at high cardiovascular risk. Due to the higher cost of their measurement in comparison to other laboratory tests, the clinical appropriateness of the combined measurement of CNP and cTns should be accurately evaluated. Accordingly, an increase in clinical utilization of a laboratory test should be based not only on the peculiar pathophysiological characteristics of a biomarker, but also on the high performance of immunoassay methods used for the biomarker measurement. From a pathophysiological point of view, elevated CNP values indicate that some stressor substances or situations are having an adverse impact on cardiac function; while an increase in cTn levels above the cut-off value indicates that a sustained or powerful stress has actually produced a damage on cardiomyocytes (i.e. a myocardial injury). Consequently , the combined measurement of CNP and cTns gives complementary and distinct rather than redundant clinical information. These two distinct pathophysiological mechanisms also explain why cardiovascular risk is strongly increased in patients with both CNP and cTns elevated. In conclusions, the combined measurement of CNP and cTns is a useful tool for diagnosis, follow-up, and stratification of risk in all patients with suspected cardiac disease, especially those admitted to the emergence department.</p>
Biochimica Clinica ; 44(2) S017-S031
Rassegne - Reviews
 
Troponina cardiaca ad alta sensibilità: risultati preliminari di un confronto tra un nuovo strumento “point-of-care” e i più comuni analizzatori impiegati nei laboratori clinici
High sensitivity cardiac troponin: preliminary results of a new point-of-care analyzer compared with the analyzers routinely used in clinical laboratories
<p>Introduction: cardiac troponin concentration measured using a point-of-care testing (POCT) analyzer could accelerate the management of patients awaiting assessment for suspected acute coronary syndrome without persistent ST-segment elevation in the emergency department (ED).<br />Methods: we evaluated a new high sensitivity cardiac troponin I (hs-cTnI) assay applied to the POCT PATHFAST&trade; (Gepa, Italia). The study of imprecision was carried out using commercial control materials and lithium-heparin plasma pools. The percentages of detectable hs-cTnI values between the Limit of Detection (LoD) and the 99th percentile as declared by the manufacturer were studied in a population of reference donors. The clinical diagnostic performance was evaluated in a population of patients presenting to the ED with chest pain (lithium-heparin plasma samples were collected at admission and 3 hours later), in comparison to the most common methods that measure hs-cTnI in clinical laboratories: Architect PLUS i2000SR, Dimension Vista, Advia Centaur XPT, UniCel DXI 800. Using the gender-specific 99thpercentile as declared from each manufacturer, the percentages of agreement and disagreement for the classification of hs-cTnI results were calculated as well as the Cohen&rsquo;s Kappa values.<br />Results: imprecision: concentration range (CV% range)=14.6-12227.3 ng/L (2.8-9.8%); % of hs-cTnI &gt;LoD and &lt;99th percentile in males and females were 30.0% and 18.5% respectively. The percentage ranges of agreement versus disagreement observed in the clinical study were 76.8-96.3% versus3.7-23.2% respectively, and the corresponding Cohen&rsquo;s Kappa values ranged from 0.532 to 0.864. The prevalence of discordant results was obtained on admission sample (range=59.1-83.3%).<br />Discussion: the observed analytical imprecision was satisfactory while the percentages of subjects with hs-cTnI&gt;LoD and &lt;99thpercentile were lower than those declared by the manufacturer because a limited number of subjects has been evaluated. The clinical performance has shown an overall satisfactory agreement with all the analytical platforms used.</p>
Biochimica Clinica ; 44(2) S059-S066
Contributi Scientifici - Scientific Papers
 
Valutazione del rischio cardiovascolare e del danno cardiaco asintomatico nella popolazione generale utilizzando la misura della troponina cardiaca con metodi ad alta sensibilità
Evaluation of cardiovascular risk and asymptomatic myocardial injury in the general population with high-sensitivity methods for cardiac troponin assay
<p>Only very recently the set-up of some immunoassay methods with high-sensitivity analytical performance allowed the accurate detection of cardiac troponin I (cTnI) and T (cTnT) levels in healthy adult subjects. Several studies have demonstrated the association between the risk of major cardiovascular events and cardiac troponin concentrations even for biomarker values within the reference intervals. High-sensitivity cTnI and cTnT methods enable to monitor myocardial renewal and remodelling, and to promptly identify patients at highest risk to heart failure development. An early and effective treatment of individuals at higher cardiovascular risk may revert the initial myocardial remodelling and slow down heart failure progression. Dedicated trials are needed also in Italian population to demonstrate the efficiency of general population screening by means of cost benefit analysis for individuals at higher risk for heart failure progression.</p>
Biochimica Clinica ; 44(2) S086-S096
Documenti SIBioC - SIBioC Documents