| 1. |
- Baron, Tomasz, et al.
(författare)
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Impact on Long-Term Mortality of Presence of Obstructive Coronary Artery Disease and Classification of Myocardial Infarction
- 2016
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Ingår i: American Journal of Medicine. - : Elsevier BV. - 0002-9343 .- 1555-7162. ; 129:4, s. 398-406
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Tidskriftsartikel (refereegranskat)abstract
- BACKGROUND: In contrast to the associated-with-thromboembolic-event type 1 myocardial infarction, type 2 myocardial infarction is caused by acute imbalance between oxygen supply and demand of myocardium. Type 2 myocardial infarction may be present in patients with or without obstructive coronary artery disease, but knowledge about patient characteristics, treatments, and outcome in relation to coronary artery status is lacking. We aimed to compare background characteristics, triggering mechanisms, treatment, and long-term prognosis in a large real-life cohort of patients with type 1 and type 2 myocardial infarction with and without obstructive coronary artery disease.METHODS: All 41,817 consecutive patients with type 1 and type 2 myocardial infarction registered in the Swedish myocardial infarction registry (SWEDEHEART) who underwent coronary angiography between January 1, 2011 and December 31, 2013, with the last follow-up on December 31, 2014, were studied.RESULTS: In 92.8% of 40,501 patients classified as type 1 and in 52.5% of patients classified as type 2 myocardial infarction, presence of an obstructive coronary artery disease could be shown. Within the patients with obstructive coronary artery disease, those with type 2 myocardial infarction were older, and had more comorbidities and smaller necrosis as compared with type 1 myocardial infarction. In contrast, there was almost no difference in risk profile and extent of myocardial infarction between type 1 and type 2 myocardial infarction patients with nonobstructive coronary artery stenosis. The crude long-term mortality was higher in type 2 as compared with type 1 myocardial infarction with obstructive coronary artery disease (hazard ratio [HR] 1.72; 95% confidence interval [CI], 1.45-2.03), but was lower after adjustment (HR 0.76; 95% CI, 0.61-0.94). In myocardial infarction patients with nonobstructive coronary artery stenosis, the mortality risk was similar regardless of the clinical myocardial infarction type (crude HR 1.14; 95% CI, 0.84-1.55; adjusted HR 0.82; 95% CI, 0.52-1.29).CONCLUSIONS: The substantial differences in risk factors, treatment, and outcome in patients with type 1 and type 2 myocardial infarction with obstructive coronary artery disease supports the relevance of the division between type 1 and type 2 in this population. On the contrary, in patients with nonobstructive coronary artery stenosis, irrespective of the clinical type, a similar risk profile, extent of necrosis, and longterm prognosis were observed, indicating that distinction between type 1 and type 2 myocardial infarction in these patients seems to be inappropriate.
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| 3. |
- Eggers, Kai M., 1962-, et al.
(författare)
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Myocardial Infarction with Non-Obstructive Coronary Arteries : The Importance of Achieving Secondary Prevention Targets
- 2018
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Ingår i: American Journal of Medicine. - : Elsevier. - 0002-9343 .- 1555-7162. ; 131:5, s. 524-531
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Tidskriftsartikel (refereegranskat)abstract
- BACKGROUND: Around 5-10% of all myocardial infarction patients have non-obstructive coronary arteries. Studies investigating the importance of follow-up and achievement of conventional secondary prevention targets in these patients are lacking.METHODS: In this analysis from the SWEDEHEART registry, we investigated 5830 myocardial infarction patients with non-obstructive coronary arteries (group 1) and 54,637 myocardial infarction patients with significant coronary artery disease (≥50% stenosis; group 2). Multivariable- and propensity score-adjusted statistics were used to assess the reduction in the one-year risk of major adverse events associated with prespecified secondary preventive measures: participation in follow-up at 6-10 weeks after the hospitalization; achievement of secondary prevention targets (blood pressure and low-density lipoprotein cholesterol levels in the target ranges, non-smoking, participation in exercise training).RESULTS: Patients in group 1 were less often followed up compared to patients in group 2 and less often achieved any of the secondary prevention targets. Participation in the 6-10 week follow-up was associated with a 3-20% risk reduction in group 1, similar as for group 2 according to interaction analysis. The improvement in outcome in group 1 was mainly mediated by achieving target range low-density lipoprotein cholesterol levels (24-32% risk reduction) and, to a smaller extent, by participation in exercise training (10-23% risk reduction).CONCLUSIONS: Selected secondary preventive measures are associated with prognostic benefit in myocardial infarction patients with non-obstructive coronary arteries, in particular achieving target range low-density lipoprotein cholesterol levels. Our results indicate that these patients should receive similar follow-up as myocardial infarction patients with significant coronary stenoses.
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| 4. |
- Eggers, Kai M., 1962-, et al.
(författare)
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Unstable Angina in the Era of Cardiac Troponin Assays with Improved Sensitivity-A Clinical Dilemma
- 2017
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Ingår i: American Journal of Medicine. - : ELSEVIER SCIENCE INC. - 0002-9343 .- 1555-7162. ; 130:12, s. 1423-1430
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Tidskriftsartikel (refereegranskat)abstract
- BACKGROUND: There is an expectation that with the adoption of more sensitive cardiac troponin (cTn) assays, unstable angina would become a rarity. However, recent data from the SWEDEHEART registry demonstrated that 15% of patients admitted with non-ST-elevation acute coronary syndrome still were regarded as having unstable angina. We aimed to further investigate the clinical characteristics and outcome of these patients. METHODS: This was a retrospective, registry-based analysis (SWEDEHEART) including 3204 unstable patients, 18,194 non-ST-elevation myocardial infarction (NSTEMI) patients, and 977 controls without acute cardiovascular disease. All patients had available data on peak cTnT levels (more sensitive assay) and 1-year outcome. RESULTS: The annual proportions of patients with unstable angina (2009-2013) among those with non-STelevation acute coronary syndrome ranged from 9.4% to 15.3%. Only 1239 unstable angina patients (39.7%) had a peak cTnT level = 14 ng/L. Patients with unstable angina tended to be younger than those with NSTEMI but had higher prevalence of most cardiovascular risk factors and more advanced coronary artery disease. Compared with controls, the adjusted hazard ratios (95% confidence interval) regarding major cardiovascular events were 2.97 (1.30-6.78) and 5.44 (2.54-11.65) in unstable angina patients with peak cTnT = 14 ng/L and > 14 ng/L, respectively. CONCLUSION: The diagnosis of unstable angina is still commonly used, even in the era of more sensitive cTn assays. Minor cTnT elevation is common, which makes unstable angina difficult to distinguish from NSTEMI. Patients with unstable angina have a nonneglectable cardiovascular risk. We suggest that the clinical management of patients presenting with unstable symptoms should depend on their estimated cardiovascular risk rather than on strictly applied diagnostic criteria. (C) 2017 Elsevier Inc. All rights reserved.
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| 5. |
- Eggers, Kai, 1962-, et al.
(författare)
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Prognostic Importance of Sex-Specific Cardiac Troponin T 99(th) Percentiles in Suspected Acute Coronary Syndrome
- 2016
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Ingår i: American Journal of Medicine. - : Elsevier BV. - 0002-9343 .- 1555-7162. ; 129:8
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Tidskriftsartikel (refereegranskat)abstract
- ObjectiveCardiac troponin levels differ between the sexes, with higher values commonly seen in men. The use of sex-specific troponin thresholds is, thus, subject of an ongoing debate. We assessed whether sex-specific cardiac troponin T (cTnT) 99th percentiles would improve risk prediction in patients admitted to Swedish coronary care units due to suspected acute coronary syndrome.MethodsIn this retrospective register-based study (48,250 patients), we investigated the prediction of all-cause mortality and the composite of cardiovascular death or nonfatal myocardial infarction within 1 year using the single 99th cTnT percentile (>14 ng/L) or sex-specific cTnT 99th percentiles (>16/9 ng/L).ResultsA total of 1078 men (3.0%) with cTnT 15-16 ng/L and 1854 women (8.4%) with cTnT 10-14 ng/L would have been reclassified regarding their cTnT status by the means of sex-specific 99th percentiles. The prevalence of cardiovascular risk factors and crude event rates increased across higher cTnT strata in both men and women. Multivariable-adjusted Cox models, however, did not demonstrate better risk prediction by sex-specific 99th percentiles. Assessing cTnT as a continuous variable demonstrated an increase in multivariable-adjusted risk starting at levels around 10-12 ng/L in both men and women.ConclusionsWe found no evidence supporting the use of sex-specific cTnT 99th percentiles in men and women admitted because of suspected acute coronary syndrome. This likely depends on sex-specific differences in disease mechanisms associated with small cTnT elevations. From a pragmatic perspective, a single cTnT cutoff slightly below 14 ng/L seems to be preferable as a threshold for medical decision-making.
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| 6. |
- James, Stefan, et al.
(författare)
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Troponin T levels and risk of 30-day outcomes in patients with the acute coronary syndrome : prospective verification in the GUSTO-IV trial
- 2003
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Ingår i: American Journal of Medicine. - 0002-9343 .- 1555-7162. ; 115:3, s. 178-184
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Tidskriftsartikel (refereegranskat)abstract
- BACKGROUND: A third-generation troponin T assay with improved precision and a lower detection limit has been developed. However, the appropriate cutoff for identifying patients with the acute coronary syndrome who are at low risk of subsequent mortality has not been established. METHODS: A retrospective evaluation of data from the Fragmin and fast Revascularization during InStability in Coronary artery disease II (FRISC-II) trial suggested that a cutoff below 0.1 microg/L for troponin T levels might be more useful in risk stratification. A prospective validation of two cutoff levels (0.03 microg/L and 0.01 microg/L) was performed in 7115 patients with non-ST-elevation acute coronary syndrome from the Global Utilization of Strategies To open Occluded arteries IV (GUSTO-IV) trial. RESULTS: Patients with troponin T levels >0.1 microg/L had greater 30-day mortality (5.5% [201/3679]) than did those with levels CONCLUSION: Using a cutoff of
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| 7. |
- Nordenskjöld, Anna M., 1977-, et al.
(författare)
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Reinfarction in patients with myocardial infarction with non-obstructive coronary arteries (MINOCA) : coronary findings and prognosis
- 2019
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Ingår i: American Journal of Medicine. - : Elsevier. - 0002-9343 .- 1555-7162. ; 132:3, s. 335-346
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Tidskriftsartikel (refereegranskat)abstract
- BACKGROUND: Myocardial infarction (MI) with non-obstructive coronary arteries (MINOCA) is common. There are limited data on the mechanisms and prognosis for reinfarction in MINOCA patients.METHODS: In this observational study of MINOCA patients hospitalized in Sweden and registered in the SWEDEHEART registry between July 2003 and June 2013 and followed until December 2013 we identified 9,092 unique patients with MINOCA out of 199,163 MI admissions in total. The 570 (6.3%) MINOCA patients who were hospitalized due to a recurrent MI constituted the study group.RESULTS: The mean age was 69.1 years and 59.1% were women. The median time to readmission was 17 months. A total of 340 patients underwent a new coronary angiography and 180 (53%) had no obstructive coronary artery disease (CAD) and 160 (47%) had obstructive CAD; 123 had one-vessel, 26 had two-vessel, 9 had three-vessel disease and two had left main together with one-vessel disease. Male gender, diabetes, peripheral vascular disease, higher levels of creatinine and ST-elevation at presentation were more common in patients with MI with obstructive CAD than in patients with a recurrent MINOCA. Mortality during a median follow-up of 38 months was similar whether the reinfarction event was MINOCA or MI with obstructive CAD 13.9% vs. 11.9% (p=0.54).CONCLUSIONS: About half of patients with reinfarction after MINOCA who underwent coronary angiography had progression of coronary stenosis. Angiography should be strongly considered in patients with MI after MINOCA. Mortality associated with recurrent events was substantial, though there was no difference in mortality between those with or without significant CAD.
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