Objective To evaluate the longitudinal imaging features of coronary artery plaques in elderly male patients with CHD and myocardial bridges and explore the longitudinal changing pat-terns.Methods A total of 117 elderly male CHD patients who underwent two examinations of coronary computed tomography angiography in our medical center from January 2018 to Septem-ber 2023 were enrolled in this study.Then 216 small plaques(0.1-50 mm3 in size)were subjec-ted,and classified into the proximal myocardial bridge group(98 plaques)and other heart part group(118 plaques)according to the site of the plaques.Plaque volume,plaque composition vol-ume,FAI,and CT-derived fraction flow reserve(CT-FFR)were calculated and recorded.Results In the 2 groups of plaques,there were no statistically differences in the plaque length,plaque nec-rotic core volume,and FAI derived from the second examination than the baseline one(P＞0.05).The plaque volume,intra-plaque fibers,and dense calcified volume of plaques in the second exami-nation were significantly greater than those at baseline,and CT-FFR was obviously smaller than the baseline level in both groups(P＜0.05,P＜0.01).In the proximal myocardial bridge group,the intra-plaque fibrofat volume in the second examination was significantly larger than that of baseline,while opposite phenomenon was observed in the plaques of the other heart part group(P＜0.05).The annual changing rates of intraplaque fibrofat volume and FAI were significantly higher in the proximal myocardial bridge group than the other heart part group[0.51％(-0.32％,0.51％)vs 0.02％(-0.46％,0.20％),P=0.046;0.55％(-2.44％,1.76％)vs 0.33％(-1.36％,2.63％),P=0.044].Conclusion In elderly male patients,the intraplaque fibrofat vol-ume,FAI and CT-FFR are more likely to change in the proximal plaques of the left anterior de-scending artery myocardial bridge than the plaques of other parts of heart,so the proximal plaques of the left anterior descending artery need more clinical attention and early intervention.

Objective To evaluate the longitudinal imaging features of coronary artery plaques in elderly male patients with CHD and myocardial bridges and explore the longitudinal changing pat-terns.Methods A total of 117 elderly male CHD patients who underwent two examinations of coronary computed tomography angiography in our medical center from January 2018 to Septem-ber 2023 were enrolled in this study.Then 216 small plaques(0.1-50 mm3 in size)were subjec-ted,and classified into the proximal myocardial bridge group(98 plaques)and other heart part group(118 plaques)according to the site of the plaques.Plaque volume,plaque composition vol-ume,FAI,and CT-derived fraction flow reserve(CT-FFR)were calculated and recorded.Results In the 2 groups of plaques,there were no statistically differences in the plaque length,plaque nec-rotic core volume,and FAI derived from the second examination than the baseline one(P＞0.05).The plaque volume,intra-plaque fibers,and dense calcified volume of plaques in the second exami-nation were significantly greater than those at baseline,and CT-FFR was obviously smaller than the baseline level in both groups(P＜0.05,P＜0.01).In the proximal myocardial bridge group,the intra-plaque fibrofat volume in the second examination was significantly larger than that of baseline,while opposite phenomenon was observed in the plaques of the other heart part group(P＜0.05).The annual changing rates of intraplaque fibrofat volume and FAI were significantly higher in the proximal myocardial bridge group than the other heart part group[0.51％(-0.32％,0.51％)vs 0.02％(-0.46％,0.20％),P=0.046;0.55％(-2.44％,1.76％)vs 0.33％(-1.36％,2.63％),P=0.044].Conclusion In elderly male patients,the intraplaque fibrofat vol-ume,FAI and CT-FFR are more likely to change in the proximal plaques of the left anterior de-scending artery myocardial bridge than the plaques of other parts of heart,so the proximal plaques of the left anterior descending artery need more clinical attention and early intervention.

Objective:To investigate the role of hyaluronic acid-mediated motion receptor(HMMR)in the malignant progression of esophageal squamous cell carcinoma(ESCC)cells and its potential molecular mechanisms.Methods:8 samples of ESCC tissues and adjacent paracancerous tissues surgically removed at the Fourth Hospital of Hebei Medical University between January 2018 and December 2020,as well as ESCC cells KYSE-30 and KYSE-150,were collected.Western blotting(WB)and immunohistochemistry(IHC)were used to detect the expression of HMMR in ESCC tissues.RNA interference was used to knock down HMMR expression in KYSE-30 and KYSE-150 cells,and qPCR and WB were used to detect the knockdown effect.The effects of HMMR knockdown on the proliferation and invasion abilities of ESCC cells were detected by CCK-8 assay and Transwell assay,respectively.4-nitroquinoline 1-oxide(4NQO)was used to induce carcinogenesis in mice and establish an ESCC model.H-E staining was used to observe the morphological changes of esophagus,and IHC was used to analyze the expressions of HMMR,FAM83D(family with sequence similarity 83 member D),E-cadherin and N-cadherin in tissues of different degrees of carcinogenesis in mice.Results:The expression level of HMMR in human ESCC tissues was significantly higher than that in adjacent paracancerous tissues(all P<0.05).After HMMR knockdown,the proliferation and invasion abilities of KYSE-30 and KYSE-150 cells were significantly reduced(P<0.05 or P<0.01),and the expression level of FAM83D also decreased(all P<0.01).In nude mouse tumor experiment,the body weight of mice in the 4NQO group was lower than that of the control group(all P<0.05).The results of IHC staining showed that HMMR was highly expressed in tumor tissues(P<0.05),and the expression of HMMR in high-grade intraepithelial neoplasia(HGIN)tissues was significantly higher than that in low-grade intraepithelial neoplasia(LGIN)tissues(P<0.001).HMMR was positively correlated with the expressions of FAM83D and N-cadherin(r=0.724,0.870,all P<0.001),and negatively correlated with the expression of E-cadherin(r=-0.714,P<0.001).Conclusion:HMMR is highly expressed in ESCC tissues and may promote the progression of ESCC by up-regulating FAM83D expression.

The increasing operating pressure of large public hospitals has forced hospitals to focus on opening up income sources and reducing expenditure.The purchase and maintenance of medical equipment is one of the important economic activities of hospi-tals.However,there are problems in large public hospitals,such as the argumentation for equipment acquisition ignoring evaluation of operational efficiency,the costing model that leads to a lack of willingness of departments to purchase equipment,and the lack of standard processes and systems for renting medical equipment among departments.Based on this,it explores the establishment of a medical equipment sharing operation mechanism in large public hospitals,promotes the improvement of the efficiency of medical equipment use in large public hospitals by establishing a medical equipment sharing center,standardizing the purchase of shared equipment,entering shared equipment information,setting up shared equipment leasing specifications,and clarifying the equipment return process and maintenance,so as to effectively control hospital operating costs,and help the high-quality development of public hospitals.

The increasing operating pressure of large public hospitals has forced hospitals to focus on opening up income sources and reducing expenditure.The purchase and maintenance of medical equipment is one of the important economic activities of hospi-tals.However,there are problems in large public hospitals,such as the argumentation for equipment acquisition ignoring evaluation of operational efficiency,the costing model that leads to a lack of willingness of departments to purchase equipment,and the lack of standard processes and systems for renting medical equipment among departments.Based on this,it explores the establishment of a medical equipment sharing operation mechanism in large public hospitals,promotes the improvement of the efficiency of medical equipment use in large public hospitals by establishing a medical equipment sharing center,standardizing the purchase of shared equipment,entering shared equipment information,setting up shared equipment leasing specifications,and clarifying the equipment return process and maintenance,so as to effectively control hospital operating costs,and help the high-quality development of public hospitals.

The increasing operating pressure of large public hospitals has forced hospitals to focus on opening up income sources and reducing expenditure.The purchase and maintenance of medical equipment is one of the important economic activities of hospi-tals.However,there are problems in large public hospitals,such as the argumentation for equipment acquisition ignoring evaluation of operational efficiency,the costing model that leads to a lack of willingness of departments to purchase equipment,and the lack of standard processes and systems for renting medical equipment among departments.Based on this,it explores the establishment of a medical equipment sharing operation mechanism in large public hospitals,promotes the improvement of the efficiency of medical equipment use in large public hospitals by establishing a medical equipment sharing center,standardizing the purchase of shared equipment,entering shared equipment information,setting up shared equipment leasing specifications,and clarifying the equipment return process and maintenance,so as to effectively control hospital operating costs,and help the high-quality development of public hospitals.

The increasing operating pressure of large public hospitals has forced hospitals to focus on opening up income sources and reducing expenditure.The purchase and maintenance of medical equipment is one of the important economic activities of hospi-tals.However,there are problems in large public hospitals,such as the argumentation for equipment acquisition ignoring evaluation of operational efficiency,the costing model that leads to a lack of willingness of departments to purchase equipment,and the lack of standard processes and systems for renting medical equipment among departments.Based on this,it explores the establishment of a medical equipment sharing operation mechanism in large public hospitals,promotes the improvement of the efficiency of medical equipment use in large public hospitals by establishing a medical equipment sharing center,standardizing the purchase of shared equipment,entering shared equipment information,setting up shared equipment leasing specifications,and clarifying the equipment return process and maintenance,so as to effectively control hospital operating costs,and help the high-quality development of public hospitals.

The increasing operating pressure of large public hospitals has forced hospitals to focus on opening up income sources and reducing expenditure.The purchase and maintenance of medical equipment is one of the important economic activities of hospi-tals.However,there are problems in large public hospitals,such as the argumentation for equipment acquisition ignoring evaluation of operational efficiency,the costing model that leads to a lack of willingness of departments to purchase equipment,and the lack of standard processes and systems for renting medical equipment among departments.Based on this,it explores the establishment of a medical equipment sharing operation mechanism in large public hospitals,promotes the improvement of the efficiency of medical equipment use in large public hospitals by establishing a medical equipment sharing center,standardizing the purchase of shared equipment,entering shared equipment information,setting up shared equipment leasing specifications,and clarifying the equipment return process and maintenance,so as to effectively control hospital operating costs,and help the high-quality development of public hospitals.

The increasing operating pressure of large public hospitals has forced hospitals to focus on opening up income sources and reducing expenditure.The purchase and maintenance of medical equipment is one of the important economic activities of hospi-tals.However,there are problems in large public hospitals,such as the argumentation for equipment acquisition ignoring evaluation of operational efficiency,the costing model that leads to a lack of willingness of departments to purchase equipment,and the lack of standard processes and systems for renting medical equipment among departments.Based on this,it explores the establishment of a medical equipment sharing operation mechanism in large public hospitals,promotes the improvement of the efficiency of medical equipment use in large public hospitals by establishing a medical equipment sharing center,standardizing the purchase of shared equipment,entering shared equipment information,setting up shared equipment leasing specifications,and clarifying the equipment return process and maintenance,so as to effectively control hospital operating costs,and help the high-quality development of public hospitals.

The increasing operating pressure of large public hospitals has forced hospitals to focus on opening up income sources and reducing expenditure.The purchase and maintenance of medical equipment is one of the important economic activities of hospi-tals.However,there are problems in large public hospitals,such as the argumentation for equipment acquisition ignoring evaluation of operational efficiency,the costing model that leads to a lack of willingness of departments to purchase equipment,and the lack of standard processes and systems for renting medical equipment among departments.Based on this,it explores the establishment of a medical equipment sharing operation mechanism in large public hospitals,promotes the improvement of the efficiency of medical equipment use in large public hospitals by establishing a medical equipment sharing center,standardizing the purchase of shared equipment,entering shared equipment information,setting up shared equipment leasing specifications,and clarifying the equipment return process and maintenance,so as to effectively control hospital operating costs,and help the high-quality development of public hospitals.