Transthoracic Echocardiography in the Assessment of Coronary Arteries

Boshchenko, Alla A.; Vrublevsky, Alexander V.; Карпов, Р. С.

doi:10.5772/21793

Cited by 4 publications

(2 citation statements)

References 92 publications

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“…Для визуализации коронарных артерий по умолчанию использовалась заводская вкладка Сoronary. Сканирование кровотока коронарных артерий проводилось с помощью обычных трансторакальных секторных датчиков M4S, M5S по методикам, описанным ранее в литературе [9][10][11]. Всем пациентам выполнялся поиск ствола ЛКА, проксимальных отделов ОА и ПМЖА в парастернальной позиции по короткой оси на уровне аорты, модифицированной для визуализации левого коронарного синуса (рис.…”

Section: The Role Of Myocardial Revascularization In the Survival Of unclassified

The Role of Myocardial Revascularization in the Survival of Patients With Altered Coronary Blood Flow Detected by Transthoracic Ultrasound

Каменских

Zagatina

Zhuravskaya

et al. 2019

SMJ

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Aim of the study was to identify the effects of myocardial revascularization on the prognosis in patients with altered coronary blood flow detected by transthoracic ultrasound.Material and Methods. Four hundred and twelve (412) patients were included in the study. The inclusion criterion was coronary velocity more than 70 cm/s during echocardiography. The study population was divided into three groups: Group 1 comprised patients with high velocities in the coronary arteries detected by ultrasound, in whom myocardial revascularization was performed; Group 2 comprised patients with high velocities in the coronary arteries, in whom myocardial revascularization was not performed and; the Control Group comprised patients with normal coronary blood flow according to ultrasound. The follow-up period was 10–11 months.Results. Seventeen (17) deaths (4.7%) occurred during follow-up. Death rates were 1.6 vs. 8.1 vs. 0% in Group 1, Group 2 and the Control Group, respectively, with a p-value for the difference between Group 1 and Group 2 (p1) of <0.009; and a p-value for the differences compared with the Control group (р2) of <0.03. Death, myocardial infarction, pulmonary edema, and acute coronary syndrome were observed in 27 patients (7.7% of the study group with accelerated blood flow). The rates of these outcomes were 4.9 vs. 11.0 vs. 0% in Group 1, Group 2, and the Control Group, respectively (p1<0.05; p2<0.006). Discussion. The study showed high rates of mortality or acute coronary events in the group of patients with pathologically high coronary flow velocities. The positive effects of revascularization on survival in this group were verified.Conclusions: 1. Left artery coronary flow velocities over 70 cm/s indicate a high probability of death or acute coronary events within 10.5 months.2. Myocardial revascularization has a significant positive effect on the survival rate and incidence of acute coronary events in patients with coronary artery flow velocities greater than 70 cm/s.3. Patients with high coronary blood flow velocities should be referred to coronary angiography or other diagnostic tests without waiting for clinical manifestations and specific symptoms for coronary artery disease.

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Section: The Role Of Myocardial Revascularization In the Survival Of unclassified

The Role of Myocardial Revascularization in the Survival of Patients With Altered Coronary Blood Flow Detected by Transthoracic Ultrasound

Каменских

Zagatina

Zhuravskaya

et al. 2019

SMJ

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“…Especially when the coronary sizes are less than 3mm. However, anatomical assessment is feasible and in children with Kawasaki's disease 26 , the coronary size measurement is performed with echocardiography in many centers routinely including our institution 27 . In this study the dilated coronaries were more than 3mm.…”

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confidence: 99%

Abstract 671: Looking with the Poiseuille’s Glasses - a Proposal of a Novel Hypothetical Method to Increase the Dimensions of the Coronary Arteries when Required

Arokiaraj

2018

ATVB

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Background: The purpose was to develop a novel hypothetical method to increase the size of coronary arteries. Methods: In the long-term observation the coronary sizes were dilated in three unexpected scenarios. The coronary artery sizes were observed in patients with mitral stenosis (n=59) by angiogram prior to percutaneous balloon mitral valvuloplasty or valve replacement surgery for severe mitral stenosis. The coronaries of patients with patent ductus arteriosus who underwent surgical closure in the past (n=12) were examined by echocardiogram. Patients with renal failure on long-term dialysis through peripheral arterio-venous fistula without left ventricular hypertrophy (n=17) were studied by echocardiography. Normal age, weight and sex matched coronary sizes served as controls in the study. All these observations were made over a period of 11.5 years. Results: The sizes of coronaries in patients with mitral stenosis, patients who underwent closure for patent ductus arteriosus, and in patients on hemodialysis through arteriovenous fistulas were higher than normal controls (p<0.05, for all). A hypothetical model to increase the coronary sizes could be developed based on the analysis of the differential equations of Poiseuille's. The proposed method is creating a peripheral arterio-venous fistula, which could be closed later electively by a percutaneous method/surgery. The closure time needs to be determined by experimental studies. The other methods could be a continuous exercise program or usage of beta-blockers. Conclusion: A novel hypothetical method of peripheral arteriovenous fistula formation could potentially increase the size of the coronaries, and this could be closed later.

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Perspective on CFD studies of coronary artery disease lesions and hemodynamics: A review

Zhang

Zhong

et al. 2014

Numer Methods Biomed Eng

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Coronary artery disease (CAD) is the most common cardiovascular disease. Early diagnosis of CAD's physiological significance is of utmost importance for guiding individualized risk-tailored treatment strategies. In this paper, we first review the state-of-the-art clinical diagnostic indices to quantify the severity of CAD and the associated invasive and noninvasive imaging technologies in order to quantify the anatomical parameters of diameter stenosis, area stenosis, and hemodynamic indices of coronary flow reserve and fractional flow reserve. With the development of computational technologies and CFD methods, tremendous progress has been made in applying image-based CFD simulation techniques to elucidate the effects of hemodynamics in vascular pathophysiology toward the initialization and progression of CAD. So then, we review the advancements of CFD technologies in patient-specific modeling, involving the development of geometry reconstruction, boundary conditions, and fluid-structure interaction. Next, we review the applications of CFD to stenotic sites, in order to compute their hemodynamic parameters and study the relationship between the hemodynamic conditions and the clinical indices, to thereby assess the amount of viable myocardium and candidacy for percutaneous coronary intervention. Finally, we review the strengths and limitations of current researches of applying CFD to CAD studies.

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Transthoracic Echocardiography in the Assessment of Coronary Arteries

Cited by 4 publications

References 92 publications

The Role of Myocardial Revascularization in the Survival of Patients With Altered Coronary Blood Flow Detected by Transthoracic Ultrasound

The Role of Myocardial Revascularization in the Survival of Patients With Altered Coronary Blood Flow Detected by Transthoracic Ultrasound

Abstract 671: Looking with the Poiseuille’s Glasses - a Proposal of a Novel Hypothetical Method to Increase the Dimensions of the Coronary Arteries when Required

Perspective on CFD studies of coronary artery disease lesions and hemodynamics: A review

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