Vector Flow Mapping and Impaired Left Ventricular Flow After the Alfieri Stitch

Akiyama, Koichi; Naito, Yoshiro; Kinoshita, Mao; Shimizu, Masaru; Hamaoka, Saeko; Yanagimoto, Hiroaki; Kato, Hideya; Nakajima, Yasufumi; Numata, Shusuke; Sawa, Teiji

doi:10.1053/j.jvca.2016.07.013

Cited by 7 publications

(3 citation statements)

References 14 publications

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“…In the study of aortic regurgitation, it considered that EL may be useful to determine the severity of disease from the aspect of cardiac load. Moreover, Akiyama et al . applied EL to estimate the inefficient flow dynamics after Alfieri stitch procedure, the results show that even in patients with normal conventional hemodynamic conditions, an increased postoperative EL may result in poor prognosis.…”

Section: Discussionmentioning

confidence: 99%

Characterization of left ventricle energy loss in healthy adults using vector flow mapping: Preliminary results

Sun

Zhu

et al. 2017

Echocardiography

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Energy loss in LV changes regularly during the cardiac cycle. The average systolic EL has a high positive correlation with AOVTI, whereas the average diastolic EL has with E-wave peak velocity. Women have higher average EL than men in both systole and diastole. By recognizing the EL characterization of healthy adults, the variation in EL may reflect cardiac dysfunction. These were preliminary results, and thus, the clinical implications of EL warrant further investigation.

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Section: Discussionmentioning

confidence: 99%

Characterization of left ventricle energy loss in healthy adults using vector flow mapping: Preliminary results

Sun

Zhu

et al. 2017

Echocardiography

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“…It increases with a change in the size and direction of the velocity vectors. For example, energy loss is likely to increase due to turbulent flow caused by factors such as aortic stenosis or an unnatural intracardiac vortex due to surgery [ 6 – 8 ].…”

Section: Discussionmentioning

confidence: 99%

Energetic performance analysis of staged palliative surgery in tricuspid atresia using vector flow mapping

Kinoshita

Akiyama

Yamashita

et al. 2017

Cardiovasc Ultrasound

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BackgroundStaged palliative surgery markedly shifts the balance of volume load on a single ventricle and pulmonary vascular bed. Blalock-Taussig shunt necessitates a single ventricle eject blood to both the systemic and pulmonary circulation. On the contrary, bidirectional cavopulmonary shunt release the single ventricle from pulmonary circulation.Case presentationWe report a case of tricuspid atresia patient who underwent first palliative surgery and second palliative surgery. Volume loading condition was assessed by energetic parameters (energy loss, kinetic energy) intraoperatively using vector flow mapping. These energetic parameters can simply indicate the volume loading condition.ConclusionVector flow mapping was useful tool for monitoring volume loading condition in congenital heart disease surgery.Electronic supplementary materialThe online version of this article (10.1186/s12947-017-0118-3) contains supplementary material, which is available to authorized users.

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“…In VFM, the ultrasound data is processed using cross-correlation analysis, a complex mathematical process that compares the signals obtained from different ultrasound beams to determine the velocity of the blood flow in each direction. The data obtained from VFM can be used to detect and quantify abnormalities in blood flow, such as characterizing recirculation zones and turbulence immediately post stenosis ( 13 - 15 ). VFM is has been validated in experimental models, and like echocardiography, is non-invasive, easy to use, and available at the point of care ( 16 ).…”

Section: How Does Blood Flow Assessment Work?mentioning

confidence: 99%

Blood flow assessment technology in aortic surgery: a narrative review

Hohri,

Chung,

Kandula

et al. 2024

J Thorac Dis

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Background and Objective Blood flow assessment is an emerging technique that allows for assessment of hemodynamics in the heart and blood vessels. Recent advances in cardiovascular imaging technologies have made it possible for this technique to be more accessible to clinicians and researchers. Blood flow assessment typically refers to two techniques: measurement-based flow visualization using echocardiography or four-dimensional flow magnetic resonance imaging (4D flow MRI), and computer-based flow simulation based on computational fluid dynamics modeling. Using these methods, blood flow patterns can be visualized and quantitative measurements of mechanical stress on the walls of the ventricles and blood vessels, most notably the aorta, can be made. Thus, blood flow assessment has been enhancing the understanding of cardiac and aortic diseases; however, its introduction to clinical practice has been negligible yet. In this article, we aim to discuss the clinical applications and future directions of blood flow assessment in aortic surgery. We then provide our unique perspective on the technique’s translational impact on the surgical management of aortic disease. Methods Articles from the PubMed database and Google Scholar regarding blood flow assessment in aortic surgery were reviewed. For the initial search, articles published between 2013 and 2023 were prioritized, including original articles, clinical trials, case reports, and reviews. Following the initial search, additional articles were considered based on manual searches of the references from the retrieved literature. Key Content and Findings In aortic root pathology and ascending aortic aneurysms, blood flow assessment can elucidate postoperative hemodynamic changes after surgical reconfiguration of the aortic valve complex or ascending aorta. In cases of aortic dissection, analysis of blood flow can predict future aortic dilatation. For complicated congenital aortic anomalies, surgeons may use preoperative imaging to perform “virtual surgery”, in which blood flow assessment can predict postoperative hemodynamics for different surgical reconstructions and assist in procedural planning even before entering the operating room. Conclusions Blood flow assessment and computational modeling can evaluate hemodynamics and flow patterns by visualizing blood flow and calculating biomechanical forces in patients with aortic disease. We anticipate that blood flow assessment will become an essential tool in the treatment planning and understanding of the progression of aortic disease.

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Vector Flow Mapping and Impaired Left Ventricular Flow After the Alfieri Stitch

Cited by 7 publications

References 14 publications

Characterization of left ventricle energy loss in healthy adults using vector flow mapping: Preliminary results

Characterization of left ventricle energy loss in healthy adults using vector flow mapping: Preliminary results

Energetic performance analysis of staged palliative surgery in tricuspid atresia using vector flow mapping

Blood flow assessment technology in aortic surgery: a narrative review

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