Browsing NTNU Open by Author "Letnes, Jon Magne"
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A Biomarker assay of Troponin T in patients with Atrial Fibrillation, and the response of Exercise until Exhaustion
Nordlund, Øystein (Master thesis, 2024)Introduksjon: Atrieflimmer (AF) er en vanlig hjertesykdom som påvirker store deler av verdens befolkning, og den er forventet å øke i fremtiden. Risikofaktorer som øker sannsynligheten for AF er alder, hjertestørrelse, ... -
Age-related change in peak oxygen uptake and change of cardiovascular risk factors. The HUNT Study
Letnes, Jon Magne; Dalen, Håvard; Aspenes, Stian Thoresen; Salvesen, Øyvind; Wisløff, Ulrik; Nes, Bjarne (Peer reviewed; Journal article, 2020)Background Large longitudinal studies on change in directly measured peak oxygen uptake (VO2peak) is lacking, and its significance for change of cardiovascular risk factors is uncertain. We aimed to assess ten-year ... -
Age-related decline in peak oxygen uptake: Cross-sectional vs. longitudinal findings. A review
Letnes, Jon Magne; Nes, Bjarne Martens; Wisløff, Ulrik (Peer reviewed; Journal article, 2023)Cardiorespiratory fitness is established as an important prognostic factor for cardiovascular and general health. In clinical settings cardiorespiratory fitness is often measured by cardiopulmonary exercise testing determining ... -
Effect of 5 years of exercise training on the cardiovascular risk profile of older adults: the Generation 100 randomized trial
Letnes, Jon Magne; Berglund, Ida Johnsen; Johnson, Kristin Espolin; Dalen, Håvard; Nes, Bjarne; Lydersen, Stian; Viken, Hallgeir; Hassel, Erlend; Steinshamn, Sigurd Loe; Vesterbekkmo, Elisabeth Kleivhaug; Støylen, Asbjørn; Reitlo, Line Skarsem; Zisko, Nina; Bækkerud, Fredrik Hjulstad; Tari, Atefe R; Ingebrigtsen, Jan Erik; Bucher Sandbakk, Silvana; Carlsen, Trude; Anderssen, Sigmund Alfred; Singh, Maria A. Fiatarone; Coombes, Jeff S.; Helbostad, Jorunn L.; Rognmo, Øivind; Wisløff, Ulrik; Stensvold, Dorthe (Peer reviewed; Journal article, 2021)Aims The aim of this study was to compare the effects of 5 years of supervised exercise training (ExComb), and the differential effects of subgroups of high-intensity interval training (HIIT) and moderate-intensity continuous ... -
Indexing cardiac volumes for peak oxygen uptake to improve differentiation of physiological and pathological remodeling: from elite athletes to heart failure patients
Letnes, Jon Magne; Nes, Bjarne Martens; Langlo, Knut Asbjørn Rise; Lundgren, Kari Margrethe; Skovereng, Knut; Sandbakk, Øyvind Bucher; Wisløff, Ulrik; Dalen, Håvard; Aksetøy, Inger-Lise Aamot (Peer reviewed; Journal article, 2023)Aims Cardiovascular structures adapt to meet metabolic demands, but current methodology for indexing by body size does not accurately reflect such variations. Therefore, we aimed to investigate how left ventricular ... -
Left Atrial Volume, Cardiorespiratory Fitness, and Diastolic Function in Healthy Individuals: The HUNT Study, Norwa
Letnes, Jon Magne; Nes, Bjarne; Vaardal-Lunde, Kristina; Bratt Slette, Martine; Mølmen, Harald Edvard; Aspenes, Stian Thoresen; Støylen, Asbjørn; Wisløff, Ulrik; Dalen, Håvard (Journal article; Peer reviewed, 2020)Background Left atrial (LA) size and cardiorespiratory fitness (CRF) are predictors of future cardiovascular events in high‐risk populations. LA dilatation is a diagnostic criterion for left ventricular diastolic ... -
Longitudinal Changes in Peak Oxygen Uptake and Influence of Age, Gender, and Self-Reported Physical Activity in a Healthy Population - THE HUNT 4 Fitness Study.
Chapagain, Bipin (Master thesis, 2020)Background: According to a few longitudinal studies, peak oxygen uptake(VO2Peak) declines at a nonlinear rate and accelerates at older ages in both men and women. Rate of decline in VO2peak per decade is higher in men ... -
Peak oxygen uptake and cardiovascular risk and disease in a healthy population
Letnes, Jon Magne (Doctoral theses at NTNU;2021:113, Doctoral thesis, 2021)SAMMENDRAG Kondisjon er vist å være en sterk risikofaktor for hjerte-karsykdom og død. Mesteparten av tidligere forskning på kondisjon som risikofaktor har vært gjennomført ved indirekte og mindre nøyaktige metoder ... -
Peak oxygen uptake and incident coronary heart disease in a healthy population: the HUNT Fitness Study
Letnes, Jon Magne; Dalen, Håvard; Vesterbekkmo, Elisabeth Kleivhaug; Wisløff, Ulrik; Nes, Bjarne (Journal article; Peer reviewed, 2018)Aims The majority of previous research on the association between cardiorespiratory fitness (CRF) and cardiovascular disease (CVD) is based on indirect assessment of CRF in clinically referred predominantly male populations. ... -
Relative left atrial and ventricular chamber size in a healthy population – The HUNT Study
Sæbø, Sigbjørn (Master thesis, 2023)Bakgrunn Venstre forkammer (VA) og ventrikkel (VV) er nært knyttet til hverandre og tilpasser seg for å møte spesifikke metabolske behov. Diastolisk dysfunksjon og økende alder er assosiert med redusert VV ende-diastolisk ... -
Symptoms of depression and all-cause mortality in farmers, a cohort study: The HUNT study, Norway
Letnes, Jon Magne; Torske, Magnhild Oust; Hilt, Bjørn; Bjørngaard, Johan Håkon; Krokstad, Steinar (Journal article; Peer reviewed, 2016)Objectives: To explore all-cause mortality and the association between symptoms of depression and all-cause mortality in farmers compared with other occupational groups, using a prospective cohort design. Methods: ... -
Temporal Relationship between High-Intensity Exercise and Atrial Fibrillation Episodes
Teige, Ana Sofia Izaguirre (Master thesis, 2024)Sammendrag Bakgrunn Atrieflimmer (AF) er en vanlig hjertearytmi og det er utilstrekkelig kunnskap om trening sin effekt til å kunne gi gode treningsanbefalinger for pasienter med AF. Forskning innen trigger effekten ... -
The relationship between diastolic function and change in cardiorespiratory fitness
Rolke, Hans Petter (Master thesis, 2022)Bakgrunn Formålet med oppgaven var å undersøke sammenhengen mellom endring i kardiorespiratorisk fitness (CRF) og diastolisk hjertefunksjon. Materiale og metode Alt datamaterialet ble samlet inn i forbindelse med HUNT3 ... -
Variability of echocardiographic measures of left ventricular diastolic function. The HUNT study
Letnes, Jon Magne; Eriksen-Volnes, Torfinn; Nes, Bjarne; Wisløff, Ulrik; Salvesen, Øyvind; Dalen, Håvard (Peer reviewed; Journal article, 2021)Objective: Investigate variability related to image acquisition and reading process for echocardiographic measures of left ventricular (LV) diastolic function, and its influence on classification of LV diastolic dysfunction ... -
Ventricular extrasystoles during exercise in patients with atrial fibrillation: Cross-sectional data from the HUNT4 Fitness Study
Bozorgsohrabi, Fatemeh (Master thesis, 2021)Background: Atrial fibrillation (AF) is an increasingly common arrhythmia and can be dangerous and symptomatic specially in cardiac disease patients. Ventricular Extrasystoles (VES) during exercise testing and the recovery ...