Blar i forfatter "Nyrnes, Audhild"

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    • Association between diastolic dysfunction and future atrial fibrillation in the Tromsø Study from 1994 to 2010 

      Tiwari, Sweta; Schirmer, Henrik; Jacobsen, Bjarne K.; Hopstock, Laila Arnesdatter; Nyrnes, Audhild; Heggelund, Geir; Njølstad, Inger; Mathiesen, Ellisiv B.; Løchen, Maja-Lisa (Journal article; Tidsskriftartikkel; Peer reviewed, 2015-05-13)
      Objective. To investigate the association between echocardiographic measurements with emphasis on diastolic dysfunction and risk of atrial fibrillation (AF) in a population-based cohort study. Methods. We followed 2406 participants from the Tromsø Study from 1994 to 2010. Left atrial (LA) size and mitral Doppler indices as measured by echocardiography were used for evaluating diastolic dysfunction. ...

    • Atrial fibrillation in The Tromsø Study 1994-2007. Risk factors, occurrence and gender differences. 

      Nyrnes, Audhild (Doctoral thesis; Doktorgradsavhandling, 2016-01-14)
      Summary Atrial fibrillation (AF) is a common cardiac arrhythmia, which increases morbidity and mortality and thereby imposes high health costs on society. The prevalence of AF has increased for several decades, and is expected to increase further, with the rising numbers of elderly people and survivors of heart diseases. Several risk factors for AF related to genetics and diseases have been ...

    • Atrial fibrillation is associated with cognitive decline in stroke-free subjects: the Tromsø Study 

      Tiwari, Sweta; Løchen, Maja-Lisa; Jacobsen, Bjarne K.; Hopstock, Laila Arnesdatter; Nyrnes, Audhild; Njølstad, Inger; Mathiesen, Ellisiv B.; Arntzen, Kjell Arne; Ball, Jocasta; Stewart, Simon; Wilsgaard, Tom; Schirmer, Henrik (Journal article; Tidsskriftartikkel; Peer reviewed, 2017-09-28)
      Background and purpose:<br>Previous studies have shown associations between atrial fibrillation (AF) and cognitive decline. We investigated this association in a prospective population study, focusing on whether stroke risk factors modulated this association in stroke-free women and men.<br>Methods:<br>We included 4983 participants (57% women) from the fifth survey of the Tromsø Study (Tromsø 5, ...

    • CHA2DS2-VASc score, left atrial size and atrial fibrillation as stroke risk factors in the Tromsø Study 

      Tiwari, Sweta; Løchen, Maja-Lisa; Jacobsen, Bjarne K.; Hopstock, Laila Arnesdatter; Nyrnes, Audhild; Njølstad, Inger; Mathiesen, Ellisiv B.; Schirmer, Henrik (Journal article; Tidsskriftartikkel; Peer reviewed, 2016-09-01)
      Objective:<br> CHA2DS2-VASc score, left atrial (LA) size and atrial fibrillation (AF) have individually been associated with stroke risk. Our aim was to investigate the predictive ability of combinations of these factors for the odds of incident stroke in a population-based cohort study.<br> Methods:<br> We followed 2844 participants from the Tromsø Study from 1994 to 2012. Information on LA size ...

    • Data from national health registers as endpoints for the Tromsø Study: Correctness and completeness of stroke diagnoses 

      Varmdal, Torunn; Løchen, Maja-Lisa; Wilsgaard, Tom; Njølstad, Inger; Nyrnes, Audhild; Grimsgaard, Sameline; Mathiesen, Ellisiv B. (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-06-14)
      Aim: To assess whether stroke diagnoses in national health registers are sufficiently correct and complete to replace manual collection of endpoint data for the Tromsø Study, a population-based epidemiological study.<p> <p>Method: Using the Tromsø Study Cardiovascular Disease Register for 2013–2014 as the gold standard, we calculated correctness (defined as positive predictive value, PPV) and ...

    • Physical activity, resting heart rate, and atrial fibrillation: the Tromsø Study 

      Morseth, Bente; Graff-Iversen, Sidsel; Jacobsen, Bjarne K.; Jørgensen, Lone; Nyrnes, Audhild; Thelle, Dag Steinar; Vestergaard, Peter; Løchen, Maja-Lisa (Journal article; Tidsskriftartikkel; Peer reviewed, 2016-03-10)
      Aims: The objective was to examine the association of physical activity and resting heart rate (RHR) with hospital-diagnosed atrial fibrillation (AF) in a Norwegian cohort. <p> Methods and Results: This prospective study included 20 484 adults (50.3% men) who participated in the third Tromsø Study survey in 1986-1987. At baseline, physical activity was assessed by a validated questionnaire, and ...

    • Validating Acute Myocardial Infarction Diagnoses in National Health Registers for Use as Endpoint in Research: The Tromsø Study 

      Varmdal, Torunn; Mathiesen, Ellisiv B.; Wilsgaard, Tom; Njølstad, Inger; Nyrnes, Audhild; Grimsgaard, Sameline; Bønaa, Kaare Harald; Mannsverk, Jan; Løchen, Maja-Lisa (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-08-03)
      <i>Purpose</i>: To assess whether acute myocardial infarction (MI) diagnoses in national health registers are sufficiently correct and complete to replace manual collection of endpoint data for a population-based, epidemiological study.<br><br> <i>Patients and Methods</i>: Using the Tromsø Study Cardiovascular Disease Register for 2013– 2014 as gold standard, we calculated correctness (defined ...