68 results on '"Bønaa, Kaare Harald"'
Search Results
52. Homocysteine Lowering and Cardiovascular Events after Acute Myocardial Infarction
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Bønaa, Kaare Harald, primary, Njølstad, Inger, additional, Ueland, Per Magne, additional, Schirmer, Henrik, additional, Tverdal, Aage, additional, Steigen, Terje, additional, Wang, Harald, additional, Nordrehaug, Jan Erik, additional, Arnesen, Egil, additional, and Rasmussen, Knut, additional
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- 2006
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53. Circulating Folate, Vitamin B12, Homocysteine, Vitamin B12 Transport Proteins, and Risk of Prostate Cancer: a Case-Control Study, Systematic Review, and Meta-analysis.
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Collin, Simon M., Metcalfe, Chris, Refsum, Helga, Lewis, Sarah J., Zuccolo, Luisa, Smith, George Davey, Chen, Lina, Harris, Ross, Davis, Michael, Marsden, Gemma, Johnston, Carole, Lane, J. Athene, Ebbing, Marta, Bønaa, Kaare Harald, Nygård, Ottar, Ueland, Per Magne, Grau, Maria V., Baron, John A., Donovan, Jenny L., and Neal, David E.
- Abstract
The article presents a study on the relationship between blood levels of folate, vitamin B12, homocysteine and vitamin B12 transport proteins, and prostate cancer risk. The case-control study was done by investigating prostate-specific antigen-detected prostate cancer of the Prostate Testing for Cancer and Treatment in Great Britain, which measured 1,461 cases and 1,507 controls. The authors found that increased risk for prostate cancer can be attributed to vitamin B12 and folate based on the cohort studies in Great Britain.
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- 2010
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54. Cancer Incidence and Mortality After Treatment With Folie Acid and Vitamin B12.
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Ebbing, Marta, Bønaa, Kaare Harald, Nygård, Ottar, Arnesen, Egil, Ueland, Per Magne, Nordrehaug, Jan Erik, Rasmussen, Knut, Njølstad, Inger, Refsum, Helga, Nilsen, Dennis w., Tverdal, Aage, Meyer, Klaus, and Vollset, Stein Emil
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VITAMIN B6 , *VITAMIN B12 , *FOLIC acid , *CANCER treatment , *CANCER-related mortality , *RANDOMIZED controlled trials , *PLACEBOS - Abstract
The article offers information on a study which investigated the effects of treatment with B vitamins on cancer outcomes and all-cause mortality. A total of 6837 patients were recruited to participate in two randomized, double-blind, placebo-controlled clinical trials conducted in Norway between 1998 and 2005, and followed up through December 31, 2007. Treatment interventions included oral treatment with folic acid combined with vitamin B12 and vitamin 6, folic acid combined with vitamin B12, vitamin 6 alone and placebo. Presented in details are the research findings.
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- 2009
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55. Cancer Incidence and Mortality After Treatment With Folie Acid and Vitamin B12.
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Ebbing, Marta, Bønaa, Kaare Harald, Nygård, Ottar, Arnesen, Egil, Ueland, Per Magne, Nordrehaug, Jan Erik, Rasmussen, Knut, Njølstad, Inger, Refsum, Helga, Nilsen, Dennis w., Tverdal, Aage, Meyer, Klaus, and Vollset, Stein Emil
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VITAMIN B6 ,VITAMIN B12 ,FOLIC acid ,CANCER treatment ,CANCER-related mortality ,RANDOMIZED controlled trials ,PLACEBOS - Abstract
The article offers information on a study which investigated the effects of treatment with B vitamins on cancer outcomes and all-cause mortality. A total of 6837 patients were recruited to participate in two randomized, double-blind, placebo-controlled clinical trials conducted in Norway between 1998 and 2005, and followed up through December 31, 2007. Treatment interventions included oral treatment with folic acid combined with vitamin B
12 and vitamin6 , folic acid combined with vitamin B12 , vitamin6 alone and placebo. Presented in details are the research findings.- Published
- 2009
- Full Text
- View/download PDF
56. KOMMENTAR.
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BØNAA, KAARE HARALD and STEIGEN, TERJE
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- 2018
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57. Akutt hjerteinfarkt uten ST-elevasjon – kan pasientene vente?
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BØNAA, KAARE HARALD and STEIGEN, TERJE
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- 2018
58. Prognostic indicators of cardiac-related events and the effect of exercise in Norwegian post-myocardial infarction participants
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Lynghaug, Sofie Johnsen, Wisløff, Ulrik, and Bønaa, Kaare Harald
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Hensikt: Å studere forskjellene mellom VE/VCO2 slope og VO2peak som prognostisk indikator blant norske studiedeltakere som har gjennomgått hjerteinfarkt, og å studere effekten av åtte måneder veiledet trening på prognostisk indikasjon i et utvalg av den norske hjerteinfarkt populasjonen. Metode: Et randomisert utvalg fra det pågående prosjektet Norwegian Trial of Physical Exercise After Myocardial Infarction, resulterte i totalt 109 deltakere (64.2±8.7 år, 176.1±7.9 cm, 87.4±16.8 kg). Utgangsverdiene for de prognostiske indikatorene, VE/VCO2 slope og VO2peak, var målt ved hjelp av en kardiopulmonal belastningstest (CPET) på tredemølle eller ergometersykkel. Innenfor de opprinnelige 109 deltakerne, gjennomførte 10 deltakere ytterligere CPET målinger av tilsvarende variabler etter åtte måneder med veiledet trening. Fysisk aktivitet og trening var målt kontinuerlig gjennom intervensjonen ved hjelp av en smartklokke. De prognostiske indikatorverdiene var kategorisert ved bruk av Weber og det ventilatoriske klassifikasjonssystemet for å kartlegge risikoen for hjerterelaterte hendelser innenfor populasjonen. Resultater: Et gjennomsnitt på 31.29±4.47 and 30.9±8.3 ble observert i henholdsvis VE/VCO2 slope (L⋅min-1) og VO2peak (mL·kg-1·min-1). Forholdet mellom VE/VCO2 slope (L⋅min-1) og VO2peak (mL·kg-1·min-1) viste en svak negativ korrelasjon (r=-0.093, p=0.336). Fordeling av variabler ved bruk av Weber- og det ventilatoriske klassifikasjonssystemet viste store variasjoner basert på hvilken variabel som ble brukt som prognostisk indikator. Etter åtte måneder med veiledet trening viste deltakerne forbedringer på henholdsvis -1.91±1.72 [CI: 0.67-3.12] og 1.35±2.53 [CI: -3.16 to 0.46], i VE/VCO2 slope (L⋅min-1) og VO2peak (mL·kg-1·min-1). Forbedringene innen både VE/VCO2 slope (r=-0.721, p=
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- 2022
59. Change in peak oxygen uptake after eight-month exercise intervention in post-myocardial infarction men and women
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Langmo, Ingrid Haagenrud, Wisløff, Ulrik, and Bønaa, Kaare Harald
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Hensikt: Studere endringen i oksygenopptak etter åtte måneders treningsintervensjon blant menn og kvinner som tidligere har vært utsatt for hjerteinfarkt. Metode: Oksygenopptak ble målt ved oppstart og slutten av intervensjonen hos elleve menn og kvinner som tidligere har vært utsatt for hjerteinfarkt (63.4 ± 9.6 år, 178 ± 10 cm, 90 ± 14 kg). Målingene ble gjennomført på tredemølle eller ergometersykkel gjennom en kardiopulmonær belastningstest (CPET). Fysisk aktivitet og trening ble målt kontinuerlig med en Amazfit NorEx treningsklokke gjennom hele intervensjonsperioden. Deltakerne ble oppfordret til å opprettholde ≥100 PAI per uke, foretrukket gjennom trening i høy intensitet. Resultater: En økning i oksygenopptak på 1.4 ± 2.4 mL·kg-1·min-1 (p=0.08 [CI: -3.03 til 0.21]) ble observert på gruppenivå. Økning i oksygenopptak som en funksjon av gjennomsnittlig total tid, tid i de ulike intensitetssonene høy, moderat og lav samt antall dager med oppnådd ≥100 PAI per uke var henholdsvis β=0.09 (p=0.29, [CI: -0.10 to 0.28]), β=0.20 (p=0.81 [CI: -1.62 til 2.01]), β=0.24 (p=0.24 [CI: -0.19 til 0.66]), β=0.16 (p=0.35 [CI: -0.20 til 0.51]) og β=0.58 (p=0.10 [CI: -0.15 to 1.31]). Deltakerne hadde et 9.9 mL·kg-0.75·min-1 høyere oksygenopptak etter treningsintervensjonen sammenliknet med referansematerialet fra NorEx (p=0.21 [CI: -25.20 to 5.59]). Konklusjon: Trening viser å ha en positiv innflytelse på kardiorespiratorisk form etter åtte måneders treningsintervensjon, hvor ukentlig dager ≥100 PAI viser å ha sterkest sammenheng med økning i oksygenopptak. En større studiepopulasjon er nødvendig for å fastslå den faktiske effekten av trening da ingen av resultatene viser å være statistisk signifikante. Videre forskning på denne pasientgruppen er nødvendig for å bedre kliniske beslutninger og belyse viktigheten av trening som sekundærforebygging etter hjerteinfarkt. Purpose: To investigate the change in peak oxygen uptake (V ̇O2peak) after eight-month exercise intervention in post-myocardial infarction (MI) men and women. Methods: V ̇O2peak was measured in 11 post-MI men and women (63.4 ± 9.6 years, 178 ± 10 cm, 90 ± 14 kg) at baseline and after eight-month exercise intervention, performed on a treadmill or cycle ergometer by cardiopulmonary exercise test (CPET). Physical activity and exercise were monitored continuously with an Amazfit Health Watch NorEx during the intervention. Participants were encouraged to obtain ≥100 PAI per week, preferably by high intensity exercise training. Results: An improvement in V ̇O2peak of 1.4 ± 2.4 mL·kg-1·min-1 (p=0.08 [CI: -3.03 to 0.21]) was observed at group level. The increase of V ̇O2peak as a function of total time, high-, moderate-, and low- intensity exercise training per week performed and amount of days obtaining ≥100 PAI per week was β=0.09 (p=0.29, [CI: -0.10 to 0.28]), β=0.20 (p=0.81, [CI: -1.62 to 2.01]), β=0.24 (p=0.24, [CI: -0.19 to 0.66]), β=0.16 (p=0.35, [CI: -0.20 to 0.51]), and β=0.58 (p=0.10, [CI: -0.15 to 1.31]), respectively. Participants demonstrated a 9.9 mL·kg-0.75·min-1 greater V ̇O2peak compared to reference material from The Norwegian Trial of Exercise after Myocardial Infarction (p=0.21, [CI: -25.20 to 5.59]). Conclusion: Exercise positively influences cardiorespiratory fitness after eight-month exercise intervention, where weekly days ≥100 PAI seems to demonstrate the greatest association. A larger sample size is crucial to determine the actual effect as results are not statistically significant. Further research on post-MI patients is necessary to improve clinical decisions and raise awareness of the importance of exercise as secondary prevention after MI.
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- 2022
60. Forekomst av og kjennetegn ved MINOCA (Myocardial Infarction with Non-Obstructive Coronary Arteries)
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Olsen, Erica Josefine, Njølstad, Inger, Mannsverk, Jan, and Bønaa, Kaare Harald
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VDP::Medical disciplines: 700::Clinical medical disciplines: 750 ,VDP::Medisinske Fag: 700::Klinisk medisinske fag: 750 - Abstract
Bakgrunn: Den vanligste årsaken til hjerteinfarkt er ruptur av et aterosklerotisk plakk som medfører trombedannelse og delvis eller total okklusjon av koronararterien. Hos 5-25% av infarktpasientene finner man likevel ingen påvisbar okklusjon eller stenose ved koronar angiografi. På bakgrunn av dette har betegnelsen Myocardial Infarction with Non-Obstructive Coronary Arteries (MINOCA) blitt etablert. Det finnes i nyere tid flere internasjonale studier som omhandler MINOCA, med det finnes derimot lite nasjonale data om temaet. Formålet med denne oppgaven er derfor å undersøke forekomsten av MINOCA hos pasienter med akutt hjerteinfarkt og som hadde indikasjon for invasiv koronar angiografi ved Universitetssykehuset Nord-Norge (UNN) Tromsø i perioden 01.01.2014-31.12.2018, samt undersøke hva som kjennetegnet de som hadde MINOCA. Materiale og metode: I en prospektiv kohortestudie har vi sett på forekomst av og kjennetegn ved MINOCA. Totalt 4585 pasienter diagnostisert med akutt hjerteinfarkt i henhold til den universelle definisjonen av hjerteinfarkt som gjennomgikk koronar angiografi i perioden 01.01.2014-31.12.2018, ble inkludert i studien. MINOCA ble definert som normale koronarkar (stenosegrad < 50 %) bedømt ved koronar angiografi. Pasienter som tidligere hadde vært revaskularisert med perkutan koronar intervensjon (PCI) og/eller koronar bypassoperasjon (CABG) samt pasienter med angiografisk koronarsykdom (stenosegrad ≥ 50 %), ble definert som MI-CAD (myocardial infarction due to coronary artery disease). Data ble hentet fra Nasjonalt register over hjerte- og karlidelser (HKR) og underliggende kvalitetsregistre. Resultater: Prevalensen av MINOCA var 7 % (n=299) i studiepopulasjonen. Sammenliknet med MI-CAD var MINOCA-pasienter signifikant (p
- Published
- 2020
61. The epidemiology of myocardial infarction. Trends in incidence, risk factors, severity, treatment and outcomes of myocardial infarction in a general population
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Mannsverk, Jan Torbjørn and Bønaa, Kaare Harald
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VDP::Medical disciplines: 700::Health sciences: 800::Epidemiology medical and dental statistics: 803 ,VDP::Medisinske Fag: 700::Helsefag: 800::Epidemiologi medisinsk og odontologisk statistikk: 803 ,The Tromsø Study ,Tromsøundersøkelsen ,VDP::Medisinske Fag: 700::Klinisk medisinske fag: 750::Kardiologi: 771 ,VDP::Medical disciplines: 700::Clinical medical disciplines: 750::Cardiology: 771 - Abstract
Paper 1 and 2 were based on the Tromsø Study, a population-based, prospective cohort study with repeated screenings for cardiovascular risk factors and follow-up with regard to disease incidence and mortality. Paper 3 was based on a local registry of consecutively patients with presumed ST-elevation myocardial infarction who had been given prehospital thrombolytic therapy, and then admitted to the University Hospital in Tromsø. In paper 1, we showed that a substantial part of the decline in coronary heart disease mortality in the young and middle-aged population was due to a decreased incidence of myocardial infarction. The study indicates that the population burden of coronary heart disease may be shifting towards women and elderly patients, suggesting that preventive gains have not penetrated equally throughout the population. The severity and case fatality of the disease, however, was declining in all groups. In paper 2, we found that age- and sex-adjusted incidence of total coronary heart disease decreased by 3% annually over 15 years of follow-up. The decrease was found primarily in reductions in out-of-hospital sudden cardiac death and hospitalized ST-elevation myocardial infarction. Reductions in serum cholesterol accounted for approximately one-third of the event decline, but decreases in smoking, blood pressure, and heart rate and increased physical activity all contributed. Increases in body mass index and diabetes mellitus were associated with modest increases in disease outcomes. Overall, risk factors accounted for 66% of the decline in incidence. Furthermore, the decline in event rates and the decline in case fatality each explained 50% of the decline in coronary heart disease mortality. This was partly explained by less severe disease in those afflicted, but also by a major improvement in treatment. In paper 3, we showed that ambulance clinicians with the support of hospital cardiologists could safely and effectively perform prehospital thrombolytic therapy. The implementation of this system was associated with significant reduction in time delays of reperfusion therapy, and reduction in post-infarct systolic heart failure, and high survival rates among ST-elevation myocardial infarction-patients suffering out-of hospital cardiac arrest.
- Published
- 2019
62. Gender contrasts in adverse effect of diabetes on the risk of incident myocardial infarction. The Tromsø study 1979-2012.
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Albrektsen, Grethe, Heuch, Ivar, Løchen, Maja-Lisa, Thelle, Dag S., Wilsgaard, Tom, Njølstad, Inger, and Bønaa, Kaare Harald
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CORONARY heart disease risk factors , *MYOCARDIAL infarction , *DIABETES risk factors , *GENDER differences (Psychology) , *DISEASE incidence - Abstract
Introduction: Diabetes is associated with increased risk of coronary heart disease (CHD). The relative risk has been found to be higher in women than men, and the more pronounced adverse effect has even been claimed to eliminate the female advantage in risk. However, few previous studies have quantified the difference in risk between men and women among individuals with diabetes. Aims: To evaluate interaction between gender and diabetes in relation to the risk of incident myocardial infarction (MI). Methods: Population-based prospective study of 33,859 individuals (51% women) in Tromsø, Norway. Median follow-up time at ages 35-94 years was 17.6 years; 2,746 individuals (854 women) were diagnosed with MI during follow-up. At their last visit, a total of 1063 individuals (3.1%) reported they had diabetes (530 men, 533 women); 170 (74 women) were later diagnosed with MI. Incidence rate ratios (IRR) were calculated as estimates of relative risk in Poisson regression analysis of person-years at risk. Interaction terms were included in the model to evaluate heterogeneity in risk estimates across subgroups. Results: Adjusted for age, gender and established CHD risk factors, diabetes was associated with a doubling in risk of MI (IRR=2.18, 95% CI=1.86-2.55). The adverse effect was slightly more pronounced for women than men (IRR of 2.55 vs. 1.96, p=0.11, test for interaction). Accordingly, the gender contrast in risk was less pronounced among individuals with diabetes (IRR of 1.63 vs 2.11), but the elevated risk in men remained significant. Considering combined categories of interacting factors, women with diabetes had a risk level close to men without diabetes, but men with diabetes had a risk about four times as high as women without diabetes. Some heterogeneity across age groups was seen, but risk estimates were imprecise. These results are preliminary. Gender heterogeneity in associations with adjustment factors may influence risk estimates. Analyses based on data with 5 year extended follow-up are planned. Conclusions: In terms of relative risk, the association between diabetes and risk of MI was more pronounced for women than men, but the female advantage in risk of MI was not erased in persons with diabetes. [ABSTRACT FROM AUTHOR]
- Published
- 2018
63. Does a history of cardiovascular disease or cancer affect mortality after SARS-CoV-2 infection?
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Kvåle R, Bønaa KH, Forster R, Gravningen K, Júlíusson PB, and Myklebust TÅ
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- Female, Humans, Male, Norway epidemiology, Risk Factors, COVID-19 mortality, Cardiovascular Diseases complications, Neoplasms complications
- Abstract
Background: Cardiovascular disease and cancer have been described as possible risk factors for COVID-19 mortality. The purpose of this study was to investigate whether a history of cardiovascular disease or cancer affects the risk of dying after a COVID-19 diagnosis in Norway., Material and Method: Data were compiled from the Norwegian Surveillance System for Communicable Diseases, the Norwegian Cardiovascular Disease Registry and the Cancer Registry of Norway. Univariable and multivariable regression models were used to calculate both relative and absolute risk., Results: In the first half of 2020, 8 809 people tested positive for SARS-CoV-2 and 260 COVID-19-associated deaths were registered. Increasing age, male sex (relative risk (RR): 1.5; confidence interval (CI): 1.2-2.0), prior stroke (RR: 1.5; CI: 1.0-2.1) and cancer with distant metastasis at the time of diagnosis (RR: 3.0; CI: 1.1-8.2) were independent risk factors for death after a diagnosis of COVID-19. After adjusting for age and sex, myocardial infarction, atrial fibrillation, heart failure, hypertension, and non-metastatic cancer were no longer statistically significant risk factors for death., Interpretation: The leading risk factor for death among individuals who tested positive for SARS-CoV-2 was age. Male sex, and a previous diagnosis of stroke or cancer with distant metastasis were also associated with an increased risk of death after a COVID-19 diagnosis.
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- 2020
- Full Text
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64. Treatment of ST-elevation myocardial infarction - an observational study.
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Arnesen JS, Strøm KH, Bønaa KH, and Wiseth R
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- Fibrinolytic Agents, Humans, Norway, Thrombolytic Therapy, Time Factors, Treatment Outcome, Angioplasty, Balloon, Coronary, Percutaneous Coronary Intervention, ST Elevation Myocardial Infarction therapy
- Abstract
Background: ST-elevation myocardial infarction is treated with reperfusion, either in the form of primary percutaneous coronary intervention (PCI) or thrombolytic therapy. The choice of treatment depends on transport time to the nearest PCI centre. Norway's geography means that thrombolytic therapy will be appropriate for many patients. Irrespective of treatment choice, it is important to avoid delays. We wished to compare the outcomes of primary PCI and thrombolytic therapy in our healthcare region and to examine whether reperfusion therapy was administered within the recommended time window., Material and Method: Using registry data and patient medical records, we compared the outcomes of primary PCI and thrombolytic therapy in cases of ST-elevation myocardial infarction in the Central Norway Regional Health Authority in the period 2015-16. The outcomes analysed were 30-day mortality, ejection fraction measured by echocardiography during the hospital stay, incidence of bleeding complications, and time from diagnosis to start of treatment., Results: The study population comprised 648 patients with ST-elevation myocardial infarction. Of these, 382 were treated with primary PCI and 266 received thrombolytic therapy. The 30-day mortality was 5.5 % in the primary PCI group and 5.6 % in the thrombolysis group (p = 1.0). There were no significant differences in ejection fraction and no cases of serious bleeding. In 45 % of the total population, reperfusion therapy was started later than recommended in guidelines., Interpretation: There was no statistically significant difference in mortality or ejection fraction when comparing primary PCI and thrombolytic therapy in an unselected population with ST-elevation myocardial infarction. Many patients experienced delayed start of treatment . It is important to take action to reduce delays at all stages of the therapeutic chain. Thrombolytic therapy should be considered when it is unclear whether transport time to a PCI centre will exceed that recommended in guidelines.
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- 2019
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65. [Untitled]
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Bønaa KH and Steigen T
- Published
- 2018
- Full Text
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66. Coronary angiography in non-ST-elevation acute myocardial infarction - whom and when?
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Bønaa KH and Steigen T
- Subjects
- Early Diagnosis, Humans, Practice Guidelines as Topic, Time Factors, Coronary Angiography statistics & numerical data, Non-ST Elevated Myocardial Infarction diagnostic imaging
- Published
- 2017
- Full Text
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67. Myocardial infarction mortality.
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Bønaa KH
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- Female, Humans, Male, Norway epidemiology, Risk Factors, Myocardial Infarction mortality
- Published
- 2011
- Full Text
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68. [An alternative hypothesis explaining the gender differences in risk of coronary heart disease].
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Bønaa KH
- Subjects
- Angina Pectoris blood, Angina Pectoris etiology, Controlled Clinical Trials as Topic, Coronary Disease blood, Coronary Disease mortality, Female, Humans, Lipids blood, Male, Myocardial Infarction blood, Myocardial Infarction etiology, Myocardial Infarction mortality, Risk Factors, Sex Characteristics, Sex Factors, Coronary Disease etiology
- Abstract
One of the most interesting aspects of coronary heart disease epidemiology is the gender difference: in all age groups women have lower risk of myocardial infarction compared to men. Epidemiological observations and results of recent controlled clinical trials suggest that it is not oestrogen that protects women. In this paper an alternative hypothesis is suggested: Men are at increased risk of coronary death and myocardial infarction because they are more prone than women to develop lipid-loaded, unstable coronary atherosclerotic plaques. This may be caused by gender differences in plasma levels of high density lipoprotein cholesterol, which is influenced by the blood testosterone level.
- Published
- 2002
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