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Eur Heart J ; 2020 Feb 20.
Artigo em Inglês | MEDLINE | ID: mdl-32077925


AIMS: The recently released 4th version of the Universal Definition of Myocardial Infarction (UDMI) introduces an increased emphasis on the entities of acute and chronic myocardial injury. We applied the 4th UDMI retrospectively in patients presenting to the emergency department with symptoms potentially indicating myocardial infarction (MI) to investigate its effect on diagnosis and prognosis. METHODS AND RESULTS: We included 2302 patients presenting to the emergency department with symptoms suggestive of MI. The final diagnosis was adjudicated sequentially according to the 3rd and 4th UDMI. Reclassification after readjudication was assessed. Established diagnostic algorithms for patients with suspected MI were applied to compare diagnostic accuracy. All patients were followed to assess mortality, recurrent MI, revascularization, and rehospitalization to investigate the effect of the 4th UDMI on prognosis. After readjudication, 697 patients were reclassified. Most of these patients were reclassified as having acute (n = 78) and chronic myocardial injury (n = 585). Four hundred and thirty-four (18.9%) patients were diagnosed with MI, compared with 501 (21.8%) MIs when adjudication was based on the 3rd UDMI. In the non-MI population, patients with myocardial injury (n = 663) were older, more often female and had worse renal function compared with patients without myocardial injury (n = 1205). Application of diagnostic algorithms for patients with suspected MI revealed a high accuracy after readjudication. Reclassified patients had a substantially higher rate of cardiovascular events compared with not-reclassified patients, particularly patients reclassified to the category of myocardial injury. CONCLUSION: By accentuating the categories of acute and chronic myocardial injury the 4th UDMI succeeds to identify patients with higher risk for cardiovascular events and poorer outcome and thus seems to improve risk assessment in patients with suspected MI. Application of established diagnostic algorithms remains safe when using the 4th UDMI.

Clin Res Cardiol ; 109(3): 393-399, 2020 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-31256260


OBJECTIVE: The emergency medical service (EMS) provides rapid pre-hospital diagnosis and transportation in ST-elevation myocardial infarction (STEMI) systems of care. Aim of the study was to assess temporal and regional characteristics of EMS-related delays in a metropolitan STEMI network. METHODS: Patient call-to-arrival of EMS at site (call-to-site), transportation time from site to hospital (site-to-door), call-to-door, patient's location, month, weekday, and hour of EMS activation were recorded in 4751 patients referred to a tertiary center with suspicion of STEMI. RESULTS: Median call-to-site, site-to-door, and call-to-door times were 9 (7-12), 39 (31-48), and 49 (41-59) minutes, respectively. The shortest transportation times were noted between 08:00 and 16:00 and in general on Sundays. They were significantly prolonged between midnight and 04:00, whereby the longest difference did not exceed 4 min in median. Patient's site of call had a major impact on transportation times, which were shorter in Central and Western districts as compared to Southern and Eastern districts of Vienna (p < 0.001 between-group difference for call-to-site, site-to-door, and call-to-door). After multivariable adjustment, patient's site of call was an independent predictor of call-to-site delay (p < 0.001). Moreover, age and hour of EMS activation were the strongest predictors of call-to-site, site-to-door, and call-to-door delays (p < 0.05). CONCLUSION: In our Viennese STEMI network, the strongest determinants of pre-hospital EMS-related transportation delays were patient's site of call, patient's age, and hour of EMS activation. Due to the significant but small median time delays, which are within the guideline-recommended time intervals, no impact on clinical outcome can be expected.

Arch Med Sci ; 15(1): 65-71, 2019 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-30697254


Introduction: The optimal duration of dual anti-platelet therapy (DAPT) following percutaneous coronary intervention (PCI) is still a matter of debate. Biomarkers may help to identify patients who will benefit from extended DAPT. The aim of the study was to test the interaction between lipid parameters and platelet function in patients with coronary artery disease (CAD) on DAPT. Material and methods: Overall, 58 patients on DAPT were prospectively included following PCI in stable CAD. Platelet markers, i.e. mean platelet volume (MPV), platelet distribution width (PDW), fraction of reticulated thrombocytes (RT) and ADP-induced multiple electrode aggregometry (MEA), as well as serum lipids, i.e. high-density lipoprotein cholesterol (HDL-C), low-density lipoprotein cholesterol (LDL-C), total cholesterol (TC), triglycerides (TG) and remnant cholesterol (RC), were assessed after intake of a maintenance dose of ASA and P2Y12 inhibitor. Results: A significant inverse correlation was found for HDL-C levels and markers of platelet activation: MPV (r = -0.351, p = 0.009), PDW (r = -0.391, p = 0.003), fraction of RT (r = -0.402, p = 0.003) and ADP-induced MEA (r = -0.345, p = 0.011). Only a weak or no association was found between other lipid parameters and platelet markers. After multivariable adjustment, HDL-C levels served as a strong and significant predictor of MPV (95% CI: -0.039 to -0.009; p = 0.002), PDW (95% CI: -0.094 to -0.034; p < 0.0001), RT (95% CI: -0.107 to -0.031; p = 0.001) and MEA (95% CI: -0.540 to -0.170; p < 0.0001), while TG, LDL-C, RC and TC were not significantly associated with platelet function. Conclusions: Within lipid parameters, only HDL-C levels are strongly associated with markers of platelet activation in CAD patients on DAPT. Accordingly, detection of dyslipidemia might indicate the need for prolongation of DAPT.

Wien Klin Wochenschr ; 130(5-6): 172-181, 2018 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-28836016


BACKGROUND AND AIM: Our senescent society includes a growing number of elderly people suffering from ST-elevation myocardial infarction (STEMI); however, exactly this population is often underrepresented in randomized trials. Hence, our aim was to investigate the influence of age on patient characteristics, as well as short- and long-term outcome in the Vienna STEMI registry. METHODS: We included all patients of the Vienna STEMI registry (2003-2009). Patients were stratified into age cohorts (≤45, 46-59, 60-79 and ≥80 years, respectively). Differences between cohorts were investigated by descriptive statistics and regression models. Crude and adjusted mortality rates were investigated using log rank test and Cox regression models, respectively. The influence of treatment on mortality was further investigated using propensity score matching. RESULTS: A total of 4579 patients fulfilled the criteria for further investigation. With rising age of cohorts, the number of females, diabetes mellitus (DM), hypertension (HTN), previous myocardial infarction (MI), shock, no reperfusion therapy and anterior wall infarction significantly increased. In contrast, the number of patients with a positive family history, smoking and hyperlipidemia (HLP) significantly declined. Log rank analysis showed significant differences between age cohorts for short- and long-term mortality. Cox regression analysis for short-term mortality revealed an independent association for age at the event, HTN and shock, while age, smoking, DM, HTN, HLP, previous MI and shock independently influenced long-term mortality after correction for confounders. Also, we found a significant association of age and total ischemic time (TIT), which however had no influence on long-term mortality (interaction term p = 0.236). Propensity score matching revealed reduced mortality rates for patients who received reperfusion therapy compared to conservative management, irrespective of age. CONCLUSIONS: Increasing age independently influenced short- and long-term mortality in patients with STEMI in the Vienna STEMI network. The TIT significantly increased with baseline age, but had no impact on mortality. Furthermore, reperfusion therapy exerted beneficial effects irrespective of the patients' age.

Infarto do Miocárdio com Supradesnível do Segmento ST/mortalidade , Fatores Etários , Idoso , Idoso de 80 Anos ou mais , Áustria , Estudos de Coortes , Feminino , Seguimentos , Humanos , Masculino , Pessoa de Meia-Idade , Reperfusão Miocárdica , Dinâmica Populacional , Modelos de Riscos Proporcionais , Sistema de Registros , Fatores de Risco