BACKGROUND Coronary heart disease(CHD)causes many adverse cardiovascular events and poses a threat to the patient’s health and quality of life.AIM To evaluate ultrasonography for evaluation of cardiac function and le...BACKGROUND Coronary heart disease(CHD)causes many adverse cardiovascular events and poses a threat to the patient’s health and quality of life.AIM To evaluate ultrasonography for evaluation of cardiac function and lesion degree in patients with CHD.METHODS A total of 106 patients with CHD(study group)and 106 healthy individuals(control group)in our hospital from March 2019 to September 2020 were selected for this study.All subjects were examined by ultrasound,and the mitral orifice’s early-to-late diastolic blood flow velocity ratio(E/A),left ventricular end-diastolic volume(LVDd),and left atrial diameter(LAD)were measured.Values were compared between the study group and healthy group,and the correlation between the ultrasonic parameters of patients with different cardiac function grades and the degree of CHD were assessed.In addition,the ultrasonic parameters of patients with different prognoses were compared after a follow-up for 6 mo.RESULTS E/A(1.46±0.34)of the study group was smaller than that of the control group(1.88±0.44),while LVDd(58.24±5.05 mm)and LAD(43.31±4.38 mm)were larger(48.15±3.93 and 34.94±2.81,respectively;P<0.05).E/A for patients with grade III disease(1.41±0.43)was smaller and their LVDd(60.04±4.21 mm)and LA(44.16±2.79 mm)were larger than those in patients with grade II disease(1.71±0.48,52.18±3.67 mm,and 39.68±2.37,respectively;P<0.05).Patients with grade IV disease had smaller E/A(1.08±0.39)and larger LVDd(66.81±5.39 mm)and LAD(48.81±3.95 mm)than patients with grade II and III disease(P<0.05).In patients with moderate disease,E/A(1.44±0.41)was smaller and LVDd(59.95±4.14 mm)and LAD(45.15±2.97 mm)were larger than in patients with mild disease(1.69±0.50,51.97±3.88 and 38.81±2.56 mm,respectively;P<0.05).In patients with severe disease,E/A(1.13±0.36)was smaller and LVDd(67.70±6.11 mm)and LAD(49.09±4.05 mm)were larger than in patients with moderate disease(P<0.05).E/A was negatively correlated with cardiac function classi-fication and disease severity,while LVDd and LAD were positively correlated with cardiac function classification and disease severity(P<0.05).E/A(1.83±0.51)for patients with good prognosis was higher than that for those with poor prognosis(1.39±0.32),while LVDd(49.60±4.39 mm)and LAD(36.13±3.05 mm)were lower(P<0.05).CONCLUSION The ultrasonic parameters of patients with CHD are abnormal,and differ significantly in patients with different cardiac function grades,lesion degree,and prognosis.展开更多
Digital infrared thermography is suitable for monitoring the planar two-dimensional temperature distribution of curved surfaces of objects by sensing their infrared radiation. Cardiac infrared thermography also has a ...Digital infrared thermography is suitable for monitoring the planar two-dimensional temperature distribution of curved surfaces of objects by sensing their infrared radiation. Cardiac infrared thermography also has a thermal coronary angiography alias. This study proposes a digital image processing methodology for locating blood clot blockage. This methodology contains four consequent processes. The two-dimensional gray scale infrared thermograph pixels are first binarized and classified as background or coronary arteries using multi-thresh adaptive segmentation.The coronary artery contours are extracted from segmented raw pixels using continuous pepper-like pixel removal,erosion,subtraction,recursive neighborhood visiting,contour point-list construction and short edge deletion.In the third process one coronary artery branch is selected by physicians for calculating the longest curved central axis using morphological thinning and neighborhood analysis. In the last process the nearest left and right distances from each pixel along the directional central axis to its corresponding boundary contour are added as the coronary artery variable diameter at the current pixel's position. A variable diameter versus straighten length diagram along this axial curved path is plotted to provide useful physiological information to the physician. An obstruction rate equation is then defined to calculate the possible vascular blockage positions with the local minimal rates. Finally,preoperative cases are tested to prove the predictive positions are correct in comparison to individual patient myocardial perfusion imaging.展开更多
文摘BACKGROUND Coronary heart disease(CHD)causes many adverse cardiovascular events and poses a threat to the patient’s health and quality of life.AIM To evaluate ultrasonography for evaluation of cardiac function and lesion degree in patients with CHD.METHODS A total of 106 patients with CHD(study group)and 106 healthy individuals(control group)in our hospital from March 2019 to September 2020 were selected for this study.All subjects were examined by ultrasound,and the mitral orifice’s early-to-late diastolic blood flow velocity ratio(E/A),left ventricular end-diastolic volume(LVDd),and left atrial diameter(LAD)were measured.Values were compared between the study group and healthy group,and the correlation between the ultrasonic parameters of patients with different cardiac function grades and the degree of CHD were assessed.In addition,the ultrasonic parameters of patients with different prognoses were compared after a follow-up for 6 mo.RESULTS E/A(1.46±0.34)of the study group was smaller than that of the control group(1.88±0.44),while LVDd(58.24±5.05 mm)and LAD(43.31±4.38 mm)were larger(48.15±3.93 and 34.94±2.81,respectively;P<0.05).E/A for patients with grade III disease(1.41±0.43)was smaller and their LVDd(60.04±4.21 mm)and LA(44.16±2.79 mm)were larger than those in patients with grade II disease(1.71±0.48,52.18±3.67 mm,and 39.68±2.37,respectively;P<0.05).Patients with grade IV disease had smaller E/A(1.08±0.39)and larger LVDd(66.81±5.39 mm)and LAD(48.81±3.95 mm)than patients with grade II and III disease(P<0.05).In patients with moderate disease,E/A(1.44±0.41)was smaller and LVDd(59.95±4.14 mm)and LAD(45.15±2.97 mm)were larger than in patients with mild disease(1.69±0.50,51.97±3.88 and 38.81±2.56 mm,respectively;P<0.05).In patients with severe disease,E/A(1.13±0.36)was smaller and LVDd(67.70±6.11 mm)and LAD(49.09±4.05 mm)were larger than in patients with moderate disease(P<0.05).E/A was negatively correlated with cardiac function classi-fication and disease severity,while LVDd and LAD were positively correlated with cardiac function classification and disease severity(P<0.05).E/A(1.83±0.51)for patients with good prognosis was higher than that for those with poor prognosis(1.39±0.32),while LVDd(49.60±4.39 mm)and LAD(36.13±3.05 mm)were lower(P<0.05).CONCLUSION The ultrasonic parameters of patients with CHD are abnormal,and differ significantly in patients with different cardiac function grades,lesion degree,and prognosis.
基金the financial support of this research under grant No.103-2218-E-234-001
文摘Digital infrared thermography is suitable for monitoring the planar two-dimensional temperature distribution of curved surfaces of objects by sensing their infrared radiation. Cardiac infrared thermography also has a thermal coronary angiography alias. This study proposes a digital image processing methodology for locating blood clot blockage. This methodology contains four consequent processes. The two-dimensional gray scale infrared thermograph pixels are first binarized and classified as background or coronary arteries using multi-thresh adaptive segmentation.The coronary artery contours are extracted from segmented raw pixels using continuous pepper-like pixel removal,erosion,subtraction,recursive neighborhood visiting,contour point-list construction and short edge deletion.In the third process one coronary artery branch is selected by physicians for calculating the longest curved central axis using morphological thinning and neighborhood analysis. In the last process the nearest left and right distances from each pixel along the directional central axis to its corresponding boundary contour are added as the coronary artery variable diameter at the current pixel's position. A variable diameter versus straighten length diagram along this axial curved path is plotted to provide useful physiological information to the physician. An obstruction rate equation is then defined to calculate the possible vascular blockage positions with the local minimal rates. Finally,preoperative cases are tested to prove the predictive positions are correct in comparison to individual patient myocardial perfusion imaging.
