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https://www.selleckchem.com/TGF-beta.html The one-dimensional model allowed studying the impact of a venous constriction on the flow distribution, and the capillary resistance was still a crucial parameter. This study aimed to evaluate the prevalence and distribution of pulmonary venous systolic flow reversal (PVSFR) in patients with severe mitral regurgitation (MR), and to examine the relationship between PVSFR profile and cardiac parameters. A total of 125 patients with severe MR who had transoesophageal echocardiography (TOE) performed were reviewed. Of these, 121 (96.8%) patients showed all four pulmonary venous (PV) flows by TOE. They were categorized into three groups by the MR aetiology degenerative MR (DMR) (n = 72), ventricular functional MR (V-FMR) (n = 20), and atrial functional MR (A-FMR) (n = 16). Eighteen (16.7%) patients had PVSFR in all four PVs. Twenty-nine (26.9%) had PVSFR in three PVs, 23 (21.3%) in two PVs, and 23 (21.3%) in one PV. PVSFR appeared at right PVs more frequently compared with left PVs. A high number of PVSFR was significantly correlated with higher pulmonary capillary wedge pressure (PCWP) and 3D vena contracta area (3D-VCA). With regard to MR aetiology, the number of PVSFRs was correlated with high 3D-VCA in patients with DMR and A-FMR, while it was correlated with high PCWP in patients with V-FMR. Laminar-type PVSFR appeared more frequently in FMR compared with DMR, and it had a relationship with higher PCWP and lower right ventricular fractional area change (RVFAC). All four PV were detected in 96.8%, and 16.8% patients had PVSFR in all four PVs. PCWP and 3D-VCA were correlated with the number of PVSFRs in severe MR patients. Laminar-type PVSFR was related to higher PCWP and lower RVFAC. All four PV were detected in 96.8%, and 16.8% patients had PVSFR in all four PVs. PCWP and 3D-VCA were correlated with the number of PVSFRs in severe MR patients. Laminar-type PVSFR was related to higher PCWP and lower RVFAC.Outsized tumours of

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