scholarly journals Echocardiographic Features of Patients with Coronary Heart Disease and Angina Pectoris under Deep Learning Algorithms

2021 ◽  
Vol 2021 ◽  
pp. 1-8
Author(s):  
Xianjing Han ◽  
Guoxin Liang
Keyword(s):  
Coronary Heart Disease ◽  
Heart Disease ◽  
Deep Learning ◽  
Left Ventricle ◽  
Automatic Segmentation ◽  
Learning Algorithms ◽  
Left Ventricular ◽  
Comprehensive Analysis ◽  
Practical Application ◽  
Normal People

Based on the VGG19-fully convolutional network (FCN) (VGG19-FCN) and U-Net model in the deep learning algorithms, the left ventricle in the ultrasonic cardiogram was segmented automatically. In addition, this study evaluated the value of ultrasonic cardiogram features after segmentation by the optimized algorithm in diagnosing patients with coronary heart disease (CHD) and angina pectorisody; patients with arrhythmia; and pa. In this study, 30 patients with confirmed CHD and 30 normal people without CHD from the same hospital in a certain area were selected as the research objects. Firstly, the VGG19-FCN and U-Net model algorithms were selected to automatically segment the left ventricular part of the apical four-chamber static image, which was realized through the weights of the fine-tune basic model algorithm. Subsequently, the experimental subjects were divided into a normal group and a CHD group, and the data were obtained through the ultrasonic cardiogram feature analysis of automatic segmentation by the algorithm. The differences in the ejection fraction (EF), left ventricular fractional shortening (FS), and E/A values (in early and late of the diastolic phase) of the left ventricle for patients in the two groups were compared. In addition, the ultrasonic cardiogram left ventricular segmentation results of normal people and patients with CHD were compared. A comprehensive analysis suggested that the U-Net model was more suitable for the practical application of automatic ultrasonic cardiogram segmentation. According to the analyzed data results, the global systolic function parameters (EF, FS, and E/A values) of the left ventricle for patients showed statistically obvious differences ( P < 0.05 ). In summary, deep learning algorithms can effectively improve the efficiency of ultrasonic cardiogram left ventricular segmentation, show a great role in the diagnosis of CHD patients, and provide a reliable theoretical basis and foundation research on the subsequent CHD imaging diagnosis. The comprehensive analysis showed that the U-Net model was more suitable for the practical application of echocardiographic automatic segmentation, and this study can effectively improve the efficiency of echocardiographic left ventricular segmentation, which played an important role in the diagnosis of coronary heart disease, providing a reliable theoretical basis and foundation for subsequent CHD imaging research.

The rate of myocardial contraction in the assessment of diastolic function

2021 ◽  
pp. 28-32
Author(s):  
T. Yu. Kulagina ◽  
V. A. Sandrikov ◽  
R. Z. Zyabirova ◽  
J. N. Petrova ◽  
V. S. Klimenko ◽  
...  
Keyword(s):  
Coronary Heart Disease ◽  
Heart Disease ◽  
Left Ventricle ◽  
Diastolic Function ◽  
Artery Bypass ◽  
Myocardial Contraction ◽  
Left Ventricular ◽  
Vector Analysis ◽  
Basal Region ◽  
Myocardial Displacement

Objective: to evaluate the results of biomechanics of myocardial contraction during diastole in patients with coronary heart disease based on the results of vector analysisMATERIAL: the study is based on 79 patients with coronary heart disease with myocardial infarction and scarring of the heart muscle aged 53±4 years and 34 healthy volunteers — 41±3 years were examined. Before and after the operation of coronary artery bypass grafting, transthoracic echocardiography was performed, followed by computer image processing and calculation of hemodynamic parameters — EDV, ESV, EF, E\A. Vector analysis was used to estimate the rate of myocardial displacement (V), from the apex to the basal region in six regions of the left ventricle.RESULTS. To determine the mechanical characteristics of left ventricular (LV) contraction, a method was used that allows dynamic series of ultrasound images to track the rate of myocardial contraction in the basal, middle and apical parts of the heart. Before surgery, during diastole, the rate of myocardial contraction increased by more than 30% in comparison with the norm in the basal, middle, and apical regions. Changes occur due to a decrease in myocardial perfusion. In response, hyperfunction occurs, which leads to the activity of additional cardiomyocytes in maintaining heart performance. After the operation, the recovery of myocardial contraction rates to normal values was noted.CONCLUSION. The results showed the dynamics of the rates of myocardial displacement mainly in the diastole, but there is no complete recovery in the hospital period. Diagnosis of the mechanical function of the myocardium during the cardiac cycle is based on the dynamics of the rates of contraction from the apex to the basal part of the left ventricle. Evaluation of the activity of myocardial contraction has certain advantages in determining the state of diastolic function of the left ventricle.

scholarly journals Clinical significance of left ventricular longitudinal deformation in coronary heart disease and non-coronary pathology

2019 ◽  
Vol 100 (2) ◽  
pp. 295-302 ◽  
Author(s):  
E G Akramova
Keyword(s):  
Coronary Heart Disease ◽  
Heart Disease ◽  
Left Ventricle ◽  
Ejection Fraction ◽  
Systolic Dysfunction ◽  
Left Ventricular ◽  
Left Ventricular Ejection ◽  
Longitudinal Deformation ◽  
Ventricular Ejection Fraction ◽  
Global Deformation

The values of the global longitudinal systolic deformation of the left ventricle have sufficiently high diagnostic informativeness, preceding the reduction of the left ventricular ejection fraction, local contractility and increase of troponins. Its indicators reflect the early deformation disorders not only in coronary heart disease, but can serve as a sensitive parameter of the formation of systolic dysfunction in diseases of any origin. The study of the global deformation of the left ventricle with the preservation of traditional echocardiographic parameters within the norm (ejection fraction, local contractility, wall thickness, valve status, diastolic function, etc.) allows identifying a risk group for the subsequent targeted search for signs of coronary atherosclerosis. The sensitivity and specificity of longitudinal deformation by speckle-tracking echocardiography in the verification of myocarditis and cardiomyopathies are higher than those of magnetic resonance imaging. The prognostic value of the levels of deformation in the short and long term in relation to rehospitalization and death due to the progression of heart failure is proved. Dynamic observation of the global longitudinal deformation allows revealing the side cardiotoxic effects of drugs in patients with cancer and rheumatic diseases. Numerous studies show that the values of global longitudinal deformation in healthy individuals vary from -18 to -25% depending on the calculation program used, distinguishing this parameter from a number of other ultrasonic parameters. Illustrative color marking of numerical values of segmental systolic deformation of the left ventricle in the form of a «bull's eye» is much less reproducible than the value of the officially recommended global deformation. The differences in global and segmental longitudinal strain thresholds due to ultrasound scanner software and the lack of standardized clinical observations and statistical generalizations should stimulate further research in this area.

Left Ventricular Rhabdomyoma: A Rare Cause of Subaortic Stenosis in the Newborn Infant

PEDIATRICS ◽  
1970 ◽  
Vol 46 (3) ◽  
pp. 464-468
Author(s):  
Karen S. Kuehl ◽  
Lowell W. Perry ◽  
Roma Chandra ◽  
Lewis P. Scott
Keyword(s):  
Nervous System ◽  
Differential Diagnosis ◽  
Heart Disease ◽  
Left Ventricle ◽  
Tuberous Sclerosis ◽  
Newborn Infant ◽  
Cardiac Failure ◽  
Pulmonary Stenosis ◽  
Left Ventricular ◽  
Subaortic Stenosis

A newborn infant with cardiac failure resulting from a rhabdomyoma of the left ventricle obstructing the aortic outflow tract is described. Mild subvalvular pulmonary stenosis was also present because of a tumor in the ventricular septum. Tuberous sclerosis occurs in at least half of infants with such tumors and was present pathologically in this child, although not apparent clinically. Rhabdomyomas must be considered in the differential diagnosis of heart disease in the newborn infant and may be associated with tuberous sclerosis even when nervous system and cutaneous signs are not present.

scholarly journals Influence of Direct Myocardial Revascularization on Left Ventricular Asynergy and Function in Patients with Coronary Heart Disease

Circulation ◽  
1973 ◽  
Vol 47 (2) ◽  
pp. 276-286 ◽  
Author(s):  
KANU CHATTERJEE ◽  
H. J. C. SWAN ◽  
WILLIAM W. PARMLEY ◽  
HECTOR SUSTAITA ◽  
HAROLD S. MARCUS ◽  
...  
Keyword(s):  
Coronary Heart Disease ◽  
Heart Disease ◽  
Myocardial Revascularization ◽  
Left Ventricular ◽  
And Function
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