Results 91 to 100 of about 11,365 (255)
Experimental Physiology, EarlyView.Abstract This narrative review highlights the impact of exercise on vascular health in females over the lifespan with an emphasis on puberty, pregnancy and menopause. These events encompass substantial changes in sex hormone levels, particularly oestrogens and progesterone.
Kathleen B. Miller +2 more
wiley +1 more source
Tilt Testing in the Diagnosis and Treatment of Syncope [PDF]
, 2010 A síncope neurocardiogénica é uma entidade com prevalência e incidência significativas. Apesar da baixa mortalidade relacionada com esta entidade, são significativas as implicações na qualidade de vida dos doentes.
Oliveira, MM, Timóteo, AT
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Squatting test: A posture to study and counteract cardiovascular abnormalities associated with autonomic dysfunction. [PDF]
, 2011 The squatting test is an active posture manoeuvre that imposes one of the most potent orthostatic stresses. In normal subjects, the changes in blood pressure and heart rate are transient because of appropriate baroreflex homeostasis and do not provoke ...
PHILIPS, Jean-Christophe, SCHEEN, André
core +1 more source
Endothelial function in vasovagal syncope [PDF]
Expert Review of Cardiovascular Therapy, 2014 Vasovagal syncope (VVS) is a common form of fainting. The pathophysiology of VVS is complex and involves changes in the autonomic and vascular tone, resulting in reflex bradycardia with marked hypotension. Paradoxical peripheral vasodilation caused by endothelial dysfunction may also play a key role in inappropriate hypotension during VVS.
openaire +5 more sources
Self-organization of blood pressure regulation: Clinical evidence
Frontiers in Physiology, 2016 The pathogenesis of vasovagal syncope has remained elusive despite many efforts to identify an underlying dysfunction. Catastrophe theory explains the spontaneous occurrence of sudden events in some mathematically complex systems known as self-organized ...
Jacques-Olivier eFortrat +2 more
doaj +1 more source
Spectral analysis of heart rate variability for assessment of autonomic nervous system activity during head-up tilt table testing [PDF]
, 2014 Spectral analysis of heart rate variability was used to assess changes in activity of autonomic nervous system (ANS) in 84 patients with history of recurrent syncope and 21 normal controls.
et al., Likar, Polona
core +1 more source
The Journal of Physiology, EarlyView.Abstract figure legend A sudden decrease in total peripheral resistance (TPR), as observed during vasovagal syncope, leads to a reduction in aortic systolic pressure (AO pressure) and afterload. In healthy individuals, the consequent decrease in left ventricular systolic pressure (LV pressure) lowers stroke work and myocardial energy expenditure.
Martin Dvoulety, Michal Sitina
wiley +1 more source
Etiological diagnosis, prognostic significance and role of electrophysiological study in patients with Brugada ECG and syncope. [PDF]
, 2017 BACKGROUND: Syncope is considered a risk factor for life-threatening arrhythmias in Brugada patients. Distinguishing a benign syncope from one due to ventricular arrhythmias is often difficult, unless an ECG is recorded during the episode.
Anselmino, M +14 more
core +2 more sources
The Journal of Physiology, EarlyView.Abstract figure legend The results from this study show that maximal cardiac output, stroke volume and leg blood flow are similar between highly trained females and males after normalisation to lean body mass (LBM). However, the 10% higher haemoglobin concentration ([Hb]) and arterial O2 content in males result in higher systemic and leg O2 delivery ...
Øyvind Skattebo +11 more
wiley +1 more source
Tilt Test in Elderly Patients with Syncope of Unknown Etiology: Experience with Pharmacological Stimulation with Nitroglycerin [PDF]
, 2005 Está demonstrado o papel do teste de inclinação na avaliação de doentes com síncope de causa não esclarecida. Nos idosos, a prevalência de episódios sincopais aumenta, associa-se a pior prognóstico e, frequentemente, implica o recurso a múltiplos exames ...
Antunes, E +8 more
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