89 research outputs found

    Ambulatory blood pressure adaptations to high-intensity interval training: a randomized controlled study

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    Objective: Hypertension remains the leading cause of cardiovascular disease and premature mortality globally. Although high-intensity interval training (HIIT) is an effective nonpharmacological intervention for the reduction of clinic blood pressure (BP), very little research exists regarding its effects on ambulatory BP. The aim of this study was to measure alterations in ambulatory and clinic BP following HIIT in physically inactive adults. Methods: Forty-one participants (22.8 \u10fc14 2.7 years) were randomly assigned to a 4-week HIIT intervention or control group. The HIIT protocol was performed on a cycle ergometer set against a resistance of 7.5% bodyweight and consisted of 3 \u10fc15 30-s maximal sprints separated with 2-min active recovery. Clinic and ambulatory BP was recorded pre and post the control period and HIIT intervention. Results: Following the HIIT intervention, 24-h ambulatory BP significantly decreased by 5.1 mmHg in sBP and 2.3 mmHg in dBP (P 1⁄4 0.011 and 0.012, respectively), compared with the control group. In addition, clinic sBP significantly decreased by 6.6 mmHg compared with the control group (P 1⁄4 0.021), with no significant changes in dBP and mean BP (mBP). Finally, 24-h ambulatory diastolic, daytime sBP, mBP and dBP, and night-time sBP and mBP variability significantly decreased post-HIIT compared with the control group. Conclusion: HIIT remains an effective intervention for the management of BP. Our findings support enduring BP reduction and improved BP variability, which are important independent risk factors for cardiovascular disease

    Use of anticoagulants and antiplatelet agents in stable outpatients with coronary artery disease and atrial fibrillation. International CLARIFY registry

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    Hypotensive effect of new exercise modalities in grade 1 or 2 hypertensive patients

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    L’hypertension artĂ©rielle (HTA) est une pathologie frĂ©quente Ă  l’origine d’un grand nombre de complications cardiovasculaires. La sĂ©dentaritĂ© est aussi un facteur de risque important de morbi-mortalitĂ© cardiovasculaire, et Ă  l’inverse, la pratique rĂ©guliĂšre d’une activitĂ© physique (AP) diminue trĂšs significativement ce risque, au-delĂ  du bĂ©nĂ©fice liĂ© Ă  la seule amĂ©lioration du niveau de pression artĂ©rielle (PA). L’AP est pour cela recommandĂ©e dans la prise en charge de l’HTA. Son action anti-hypertensive est observĂ©e en « aigu » au dĂ©cours immĂ©diat d’un exercice, mais aussi en « chronique » avec des adaptations induites par la rĂ©pĂ©tition des sĂ©ances : adaptations Ă  la fois fonctionnelles (mĂ©canismes de rĂ©gulation de la PA) et structurelles (composants des vaisseaux). Face Ă  la diversitĂ© des modalitĂ©s d’AP disponibles (en aĂ©robie ou en rĂ©sistance, mode continu ou intermittent, Ă  l’extĂ©rieur, en gymnase ou en piscine) et des envies et possibilitĂ©s des patients, notre objectif Ă©tait d’étudier, chez des personnes hypertendues, le bĂ©nĂ©fice de modalitĂ©s nouvelles (exercice intermittent Ă  haute intensitĂ© (HIIE), exercice sur vĂ©lo en piscine), en privilĂ©giant les mesures ambulatoires de PA. Notre recherche a ainsi identifiĂ©, par la rĂ©alisation d’une mĂ©ta-analyse ainsi que de 3 Ă©tudes cliniques :A- concernant l’AP : 1- le bĂ©nĂ©fice hypotenseur de l’HIIE au dĂ©cours d’une session d’exercice, au dĂ©cours d’un entraĂźnement court de 2 semaines (3 sessions / semaine), et d’un programme complĂ©tĂ© de conseils diĂ©tĂ©tiques de 9 mois (2 HIIE / semaine) ; 2- le bĂ©nĂ©fice additionnel de sa pratique sur cyclo-ergomĂštre dans l’eau ; 3- un effet favorable sur la compliance artĂ©rielle (mesure de vitesse de l’onde de pouls, VOP). B- concernant le patient, des modĂ©rateurs favorables tels qu’une PA de repos ≄135/85 mm Hg, l’association de mesures diĂ©tĂ©tiques. Ces Ă©lĂ©ments devraient contribuer Ă  amĂ©liorer la prescription d’AP en cas d’HTA.High blood pressure is a common disease with many cardiovascular complications. Inactivity is also an important cardiovascular risk factor, and the regular practice of physical activity (PA) decreases very significantly this risk, more than the single improvement of blood pressure (BP). Therefore, PA is recommended for its contribution on the management of hypertension. The “acute” BP fall following a bout of exercise contributes to the “chronic” antihypertensive effect of physical training, by inducing both functional and structural adaptations (BP regulation systems and components of arterial wall, respectively). Face to the many modalities of PA (aerobic, strength, continuous or intermittent mode, outdoor, indoor or in swimming-pool) and to the desires and availabilities of the patient, we aimed to assess, in hypertensive individuals, the effect of new modes (high-intensity intermittent exercise (HIIE), cycling in immersed condition) using preferably ambulatory BP monitoring measures. Thereby, our research identified, through a meta-analysis and 3 clinical studies, the following results:A- regarding PA characteristics : 1- a BP decrease following one bout of HIIE, 2-week HIIE training (thrice a week) and 9-month HIIE training (twice a week) in a combined lifestyle program;2- an additional BP improvement in up-to-the chest immersed condition; 3- an improvement in arterial stiffness (pulse wave velocity, PWV);B- regarding patient’s characteristics: favorable moderators such as a resting BP ≄135/85 mm Hg, or the association of diet intervention. These results should contribute to improve prescription of PA in hypertensive individuals

    Avoidance of Small Stocks and Institutional Performance

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    Comparaison et reproductibilité de trois méthodes de mesure de rigidité artérielle (impédancemétrique, échographique, tonométrique, chez des sujets sains)

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    Background: Arterial stiffness is an important pathophysiological determinant in the occurrence of cardiovascular diseases. The current gold standard for its assessment is the carotid-femoral pulse wave velocity (cfPWV) by tonometric method. It could be interesting to develop newer, easier and less expensive methods. Objectives: The main objective of our study was to compare the impedance wave velocity (IWV) measurement (bioimpedance analysis) with cfPWV values. Secondary aims were to compare the pulse wave velocity by Doppler (edPWV) measurement (by a new convenient method) with cfPWV values, and to assess their respective reproducibility. Methods: Twenty healthy volunteer subjects (10 men and 10 women, average age 30.3+-8.6 years) were studied: cfPWV with SphygmoCorÂź tonometer, IWV with an impedancemetric prototype (EmkaÂź Society) and edPWV with an echocardiograph (General ElectricsÂź). Measurements were repeated 48 hours later for each subject. Results: IWV and cfPWV are statistically comparable in our study (Pearson correlation coefficient r 0.431, p = 0.06). EdPWV and cfPWV are statistically comparable (r = 0.570, p = 0.009). IWV measurement appears reproducible (coefficient of variation of reproducibility (CVR) 10.3%, intraclass correlation coefficient (ICC) 0.78), as well as edPWV (CVR = 12%, ICC = 0,80), and cfPWV measurement in case of exclusion of one subject from the analysis (CVR = 13,6% ; ICC = 0,64). Conclusion: Arterial stiffness assessment by IWV method is attractive and reproducible, but requires some adjustments to be comparable with the reference method. edPWV method appears valid in our healthy subjects' population, and easy to be realized during the cardiologist's ultrasound examination.POITIERS-BU MĂ©decine pharmacie (861942103) / SudocSudocFranceF

    Reproductibilité de l'analyse de la compliance artérielle par tonométrie d'aplanation chez des sujets hypertendus

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    Contexte : L'hypertension artĂ©rielle (HTA) est une pathologie touchant un quart de la population adulte et concourant Ă  une forte morbimortalitĂ© cardiovasculaire (CV) en partie liĂ© Ă  la rigidification artĂ©rielle. La tonomĂ©trie d'aplanation fournie diffĂ©rents paramĂštres permettant d'Ă©valuer la compliance artĂ©rielle. Objectifs : Etudier la reproductibilitĂ© de la mesure de la vitesse (VOP) et l'analyse de l'onde de pouls (pressions artĂ©rielles centrales, pression et index d'augmentation) chez des sujets hypertendus et en prĂ©ciser les dĂ©terminants. MĂ©thodes : 30 sujets ont Ă©tĂ© hospitalisĂ©s pour bilan d'HTA entre janvier et avril 2012. Une mesure de la VOP et une analyse de l'onde de pouls Ă©taient rĂ©alisĂ©es Ă  l'inclusion avec le systĂšme SphygmocorÂź puis dans les 4 jours dans des conditions similaires. RĂ©sultats : Les paramĂštres de compliance Ă©taient reproductibles. La VOP avait un coefficient de variabilitĂ© de 1,2% et un coefficient de corrĂ©lation intra-classe Ă  0,77 (0,57-0,88). Si la majoritĂ© des critĂšres Ă©taient corrĂ©lĂ©s Ă  l'Ăąge, la VOP Ă©tait liĂ©e Ă  la pression pĂ©riphĂ©rique, source d'imprĂ©cisions tandis que les paramĂštres de rĂ©flexion Ă©taient surtout influencĂ©s par la taille et le sexe des patients. Conclusion : La tonomĂ©trie d'aplanation est un outil reproductible permettant d'Ă©valuer la rigiditĂ© artĂ©rielle. Son existence, dĂ©pistĂ©e par une VOP > 10 m/s, signe l'atteinte d'un organe cible par l'HTA reflĂ©tant un risque CV accru. NĂ©anmoins les mesures, calibrĂ©es sur les pressions artĂ©rielles au brassard, doivent ĂȘtre faites avec soins et ses sources d'imprĂ©cision connues. Les paramĂštres liĂ©s Ă  l'analyse de l'onde de pouls n'ont pas encore une fiabilitĂ© permettant leur intĂ©gration dans la pratique courante.POITIERS-BU MĂ©decine pharmacie (861942103) / SudocSudocFranceF

    Adaptation cardio-respiratoire des sportifs de haut niveau explorés au PÎle Coeur-Poumons du CHU [centre hospitalier universitaire] de Poitiers

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    POITIERS-BU MĂ©decine pharmacie (861942103) / SudocPARIS-BIUM (751062103) / SudocSudocFranceF
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