Results 81 to 90 of about 4,471,992 (283)
Abnormalities of vascular function in resistant hypertension
Blood Pressure, 2011 We aimed to evaluate markers of vascular dysfunction in patients with resistant hypertension (RH). A group of 144 patients (61 years, 42% women) with essential RH were divided in two groups based on ambulatory blood pressure monitoring (ABPM). True RH (72%) was considered when 24-h blood pressure (BP) was ≥ 130 and/or 80 mmHg.
Esteban Poch +6 more
openaire +4 more sources
Extraction of Vascular Wall in Carotid Ultrasound via a Novel Boundary-Delineation Network [PDF]
arXiv, 2022 Ultrasound imaging plays an important role in the diagnosis of vascular lesions. Accurate segmentation of the vascular wall is important for the prevention, diagnosis and treatment of vascular diseases. However, existing methods have inaccurate localization of the vascular wall boundary.
arxiv
HYPERTENSION, 1998 Superoxide radical (O2-) is increased in the vessel wall of spontaneously hypertensive rats (SHR) where its blockade potentiates endothelium-dependent vasodilation.
C. Schnackenberg, W. Welch, C. Wilcox
semanticscholar +1 more source
Fine-grained simulations of the microenvironment of vascularized tumours [PDF]
arXiv, 2019 One of many important features of the tumour microenvironment is that it is a place of active Darwinian selection where different tumour clones become adapted to the variety of ecological niches that make up the microenvironment. These evolutionary processes turn the microenvironment into a powerful source of tumour heterogeneity and contribute to the ...
arxiv
Primary Role of the Kidney in Pathogenesis of Hypertension
LifePrevious transplantation studies and the concept of ‘nephron underdosing’ support the idea that the kidney plays a crucial role in the development of essential hypertension.
Gheun-Ho Kim
doaj +1 more source
Arquivos Brasileiros de Cardiologia, 2012 FUNDAMENTO: A taxa de vasorreatividade pulmonar da Hipertensão Arterial Pulmonar Esquistossomótica (HAPE) não é conhecida. Dados hemodinâmicos obtidos pelo cateterismo cardíaco associam-se aos critérios clínicos de gravidade mais utilizados.
Flávio A. A. Japyassú +4 more
doaj
PharmaceuticalsBackground: Bioactivity assessments of plant-derived products can benefit human and animal health, especially in regions with vast plant diversity. This study focused on chemical and cardiovascular analyses of Erythroxylum campestre A. St. Hil.
Letícia Henrique Dantas Gomes de Lima +10 more
doaj +1 more source
Revisiting PI3-kinase signalling in angiogenesis
Vascular Biology, 2019 PI3Ks belong to a family of lipid kinases that comprises eight isoforms. They phosphorylate the third position of the inositol ring present in phosphatidylinositol lipids and, in turn, activate a broad range of proteins. The PI3K pathway regulates primal
Piotr Kobialka, Mariona Graupera
doaj +1 more source
Nitric oxide regulates basal systemic and pulmonary vascular resistance in healthy humans.
Circulation, 1994 BACKGROUND The endothelium synthesizes and releases a relaxing factor with the physiochemical properties of nitric oxide (NO). However, the role of endothelium-derived NO in the basal regulation of systemic and pulmonary vascular resistance in humans is ...
J. Stamler +4 more
semanticscholar +1 more source
Ultrafast ultrasound coded vector Doppler imaging of blood flow velocity and resistivity [PDF]
S. Yan, Y. Ding, G. Ma, Y. Fu, K. Xu, and D. Ta, Ultrafast
Ultrasound Coded Vector Doppler Imaging of Blood Flow Velocity and
Resistivity, Acta Physica Sinica, vol. 74, no. 1, 2025Dynamic and precise measurement of cerebral blood flow velocity is crucial in neuroscience and the diagnosis of cerebrovascular diseases. Traditional color Doppler ultrasound can only measure the velocity component along the ultrasound beam, which restricts its ability to accurately capture the complete blood flow vector in complex environments.
arxiv +1 more source