The objective of the work was a detailed examination of the incidence and changes of mitral regurgitation (MR) in conjunction with percutaneous transluminal valvotomy of the mitral valve (VMCH). Using coloured Doppler mapping, the authors examined a total of 40 patients before and in the course of one week after VMCH. They assessed the number of regurgitation jets the site of their development, the timing and haemodynamic impact of MR. Knowing the site of development of MR, the authors were able to assess whether the regurgitation after VMCH persisted, developed de novo or disappeared. The total number of mitral regurgitation increased after VMCH from 38 to 51 (increase by 34%, p < 0.05) with a significant rise of the number of double regurgitation jets (4 before as compared with 12 after VMCH, p < 0.05). Before VMCH the authors recorded a holocystic MR in 53%, after VMCH in 86% of the patients (p < 0.01). While before VMCH almost half the regurgitation jets originated in the central portion of the valve, after VMCH MR originated mainly from the area of commissures (48% regurgitation jets before, 79% after VMCH, p < 0.01). Only in 33% of MR after VMCH persisting regurgitation was involved, almost half (47%) of 38 regurgitation jets present before VMCH, disappeared after valvulotomy. MR displays a considerable variability. This may be one of the reasons why prediction of the development and severity of MR after PTMV is difficult.
Download full-text PDF |
Source |
---|
Acta Cardiol
January 2025
Cardiology, AZ Groeninge, Kortrijk, Belgium.
Objectives: Edge-to-edge mitral valve repair with MitraClip leads to a differed flow pattern and a decreased flow velocity at the left ventricle apex. This combination may lead to initiation of thrombus formation, especially in patients with severely reduced ejection fraction. The prevalence and mechanism of left ventricular thrombus formation after MitraClip implantation is still unknown.
View Article and Find Full Text PDFEchocardiography
December 2024
Department of Radiology, G.B. Rossi University Hospital, University of Verona, Verona, Italy.
Cardiovascular magnetic resonance imaging (CMR) has received extensive validation for the assessment of valvular heart disease (VHD) and offers an accurate and direct method for the quantification of aortic regurgitation (AR). According to the current guidelines, CMR represents a useful second-line investigation in patients with poor acoustic windows or when echocardiography is inconclusive, for example, in cases of multiple or eccentric aortic jets. Without ionizing radiation exposure, CMR provides in-depth information not only on the severity degree of AR, providing a precise quantification of regurgitant volume and fraction, but also on cardiac structure and function, being recognized as the gold standard for the assessment of heart chamber size and systolic function.
View Article and Find Full Text PDFEur Heart J Case Rep
October 2024
Department of Cardiology, West China Hospital, Sichuan University, 37 Guoxue Road, 610041 Chengdu, China.
Brain Sci
September 2024
Department of Neurosurgery, "Carol Davila" University of Medicine and Pharmacy, 050474 Bucharest, Romania.
The Coanda effect is a fluid dynamics phenomenon in which a fluid jet adheres to a convex or flat surface. This effect occurs when a liquid or gas jet emerging from an orifice clings to an adjacent surface and entrains the surrounding fluid, creating a lower-pressure region along its path that maintains its attachment to the surface. The Coanda effect accounts for the behavior of blood flow in the fetal right atrium and the dispersion of eccentric mitral regurgitation jets along atrial walls.
View Article and Find Full Text PDFHeliyon
June 2024
Department of Cardiovascular Diseases, Mayo Clinic, 5777 East Mayo Blvd, Phoenix, AZ, 85054, USA.
Background: Residual mitral regurgitation (MR) is frequent after transcatheter edge-to-edge repair (TEER). There is controversy regarding the clinical impact of residual MR and its quantitative assessment by transthoracic echocardiography (TTE), which is often challenging with multiple eccentric jets and artifact from the clip. The utility of the velocity time integral (VTI) ratio between the mitral valve (MV) and left ventricular outflow tract (LVOT), (VTI), a simple Doppler measurement that increases with MR, has not been assessed post TEER.
View Article and Find Full Text PDFEnter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!