In increase of pre- and postcapillary resistance due to hypothermia, hypoxia induced no considerable shifts in back-ground values of the organ hemodynamics in the cat small intestine preparations constantly perfused with own blood.
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Automated volumetry of core and peel intrapulmonary vasculature on computed tomography angiography for non-invasive estimation of hemodynamics in patients with pulmonary hypertension (2022 updated hemodynamic definition).
Cardiovasc Diagn Ther
December 2024
Clinic for Diagnostic and Interventional Radiology, Heidelberg University Hospital, Heidelberg, Germany.
Background: Computed tomography pulmonary angiography (CTPA) is frequently performed in patients with pulmonary hypertension (PH) and may aid non-invasive estimation of pulmonary hemodynamics. We, therefore, investigated automated volumetry of intrapulmonary vasculature on CTPA, separated into core and peel fractions of the lung volume and its potential to differentially reflect pulmonary hemodynamics in patients with pre- and postcapillary PH.
Methods: A retrospective case-control study of 72 consecutive patients with PH according to the 2022 joint guidelines of the European Society of Cardiology and the European Respiratory Society who underwent right heart catheterization (RHC) and CTPA within 7 days between August 2013 and February 2016 at Thoraxklinik at Heidelberg University Hospital (Heidelberg, Germany) was conducted.
Reassessing Pulmonary Hypertension Classification: Utilizing Criteria for Heart Failure with Preserved Ejection Fraction Instead of Pulmonary Arterial Wedge Pressure.
J Clin Med
December 2024
Department of Respiratory Medicine and Infectious Diseases, Hannover Medical School, Carl-Neuberg-Str. 1, 30625 Hannover, Germany.
: The current classification of pulmonary hypertension (PH) distinguishes between pre-capillary (PAWP ≤ 15 mmHg) and post-capillary (PAWP > 15 mmHg) forms, with left heart disease, especially heart failure with preserved ejection fraction (HFpEF), being a common cause of PH. We investigated the suitability of an HFpEF diagnosis instead of PAWP in diagnosing PH associated with HFpEF. : In a retrospective, single-center analysis, we reviewed diagnoses from our database, focusing on patients initially diagnosed with idiopathic pulmonary arterial hypertension (IPAH) or PH associated with HFpEF (PH-HFpEF) based on their PAWP.
View Article and Find Full Text PDFSemaglutide restores astrocyte-vascular interactions and blood-brain barrier integrity in a model of diet-induced metabolic syndrome.
Diabetol Metab Syndr
January 2025
Laboratory of Immunopharmacology, Oswaldo Cruz Institute, Oswaldo Cruz Foundation-Fiocruz, Campus Maré. Centro de Pesquisa, Inovação e Vigilância em Covid-19 e Emergências Sanitárias. Endereço: Av. Brasil, 4036-Bloco 2. Manguinhos, Rio de Janeiro, RJ, CEP 21040-361, Brazil.
Introduction: Metabolic syndrome (MetS) is a metabolic disorder related to obesity and insulin resistance and is the primary determinant of the development of low-intensity chronic inflammation. This continuous inflammatory response culminates in neuroimmune-endocrine dysregulation responsible for the metabolic abnormalities and morbidities observed in individuals with MetS. Events such as the accumulation of visceral adipose tissue, increased plasma concentrations of free fatty acids, tissue hypoxia, and sympathetic hyperactivity in individuals with MetS may contribute to the activation of the innate immune response, which compromises cerebral microcirculation and the neurovascular unit, leading to the onset or progression of neurodegenerative diseases.
View Article and Find Full Text PDFMany patients with chronic thromboembolic pulmonary disease (CTEPD) suffer from exertional dyspnea. It is unclear if CTEPD is associated with exercise pulmonary hypertension (ePH). This cross-sectional study aimed to determine the occurrence of ePH in patients with CTEPD and to identify the haemodynamic changes during exercise.
View Article and Find Full Text PDFChildren with left heart disease are at risk for developing pulmonary hypertension, initially secondary to pulmonary venous hypertension that can progress to include elevated pulmonary vascular resistance, known as combined pre- and postcapillary pulmonary hypertension. Elevated pulmonary vascular resistance may pose a risk to the right ventricle of a newly transplanted heart because of increased afterload and is an important consideration for heart transplant eligibility. However, the epidemiology, pathophysiology, optimal diagnostic and treatment approaches, and thresholds for pulmonary vascular resistance in pulmonary hypertension associated with left heart disease remain unclear because of lack of evidence, particularly in pediatrics.
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