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1.
Article in Chinese | WPRIM | ID: wpr-737218

ABSTRACT

Global longitudinal strain (GLS) at rest on two-dimensional speckle tracking echocardiography (2D STE) was demonstrated to help detect coronary artery disease (CAD).However,the optimal cut-off point of GLS and its diagnostic power for detecting critical CAD in non-diabetes mellitus (DM) patients are unknown.In the present study,211 patients with suspected CAD were prospectively included,with DM patients excluded.All patients underwent echocardiography and subsequently coronary angiography within 3 days.Left ventricular (LV) GLSs were quantified by 2D STE.Territorial peak systolic longitudinal strains (TLSs) were calculated based on the perfusion territories of the 3-epicardial coronary arteries in a 17-segment LV model.Critical CAD was defined as an area stenosis ≥70% in ≥1 epicardial coronary artery (≥50% in left main coronary artery).Totally 145 patients were diagnosed as having critical CAD by coronary angiography.Significant differences were observed in all strain parameters between patients with and without critical CAD.The area under the receiver operating charcteristic (ROC) curve (AUC) for GLS in the detection of left main (LM) or threevessel CAD was 0.875 at a cut-off value of-19.05% with sensitivity of 78.1% and specificity of 72.7%,which increased to 0.926 after exclusion of apical segments (cut-off value-18.66%;sensitivity 84.4% and specificity 81.8%).The values of TLSs were significantly lower in regions supplied by stenotic arteries than in those by non-stenotic arteries.The AUC for the TLSs to identify critical stenosis of left circumflex (LCX) artery,left anterior descending (LAD) artery and right coronary artery (RCA),in order of diagnostic accuracy,was 0.818 for LCX,0.764 for LAD and 0.723 for RCA,respectively.In conclusion,in non-DM patients with suspected CAD,GLS assessed by 2D STE is an excellent predictor for LM or three-vessel CAD with high diagnostic accuracy,and a higher cut-off point than reported before should be used.Excluding apical segments in the calculation of GLS can further improve the predictive accuracy of GLS.It is unsatisfactory for TLSs to be used to identify stenotic coronary arteries.

2.
Article in Chinese | WPRIM | ID: wpr-735750

ABSTRACT

Global longitudinal strain (GLS) at rest on two-dimensional speckle tracking echocardiography (2D STE) was demonstrated to help detect coronary artery disease (CAD).However,the optimal cut-off point of GLS and its diagnostic power for detecting critical CAD in non-diabetes mellitus (DM) patients are unknown.In the present study,211 patients with suspected CAD were prospectively included,with DM patients excluded.All patients underwent echocardiography and subsequently coronary angiography within 3 days.Left ventricular (LV) GLSs were quantified by 2D STE.Territorial peak systolic longitudinal strains (TLSs) were calculated based on the perfusion territories of the 3-epicardial coronary arteries in a 17-segment LV model.Critical CAD was defined as an area stenosis ≥70% in ≥1 epicardial coronary artery (≥50% in left main coronary artery).Totally 145 patients were diagnosed as having critical CAD by coronary angiography.Significant differences were observed in all strain parameters between patients with and without critical CAD.The area under the receiver operating charcteristic (ROC) curve (AUC) for GLS in the detection of left main (LM) or threevessel CAD was 0.875 at a cut-off value of-19.05% with sensitivity of 78.1% and specificity of 72.7%,which increased to 0.926 after exclusion of apical segments (cut-off value-18.66%;sensitivity 84.4% and specificity 81.8%).The values of TLSs were significantly lower in regions supplied by stenotic arteries than in those by non-stenotic arteries.The AUC for the TLSs to identify critical stenosis of left circumflex (LCX) artery,left anterior descending (LAD) artery and right coronary artery (RCA),in order of diagnostic accuracy,was 0.818 for LCX,0.764 for LAD and 0.723 for RCA,respectively.In conclusion,in non-DM patients with suspected CAD,GLS assessed by 2D STE is an excellent predictor for LM or three-vessel CAD with high diagnostic accuracy,and a higher cut-off point than reported before should be used.Excluding apical segments in the calculation of GLS can further improve the predictive accuracy of GLS.It is unsatisfactory for TLSs to be used to identify stenotic coronary arteries.

3.
Article in English | WPRIM | ID: wpr-285262

ABSTRACT

The association between high-density lipoprotein cholesterol (HDL-C) and mortality in patients with acute aortic dissection (AAD) is unclear. From January 2007 to January 2014, a total of 928 consecutive AAD patients who were admitted within 48 h after the onset of symptoms were enrolled in the study. Patients were divided into two groups according to whether serum HDL-C level was below the normal lower limit or not. The Cox proportional hazard regression model was used to identify the predictive value of HDL-C for in-hospital mortality in patients with AAD. As compared with normal HDL-C group (n=585), low HDL-C group (n=343) had lower levels of systolic blood pressure and hemoglobin and higher levels of leukocyte, alanine aminotransferase, blood glucose, blood urea nitrogen, creatinine and urea acid. Low HDL-C group had significantly higher in-hospital mortality than normal HDL-C group (21.6% vs. 12.6%, log-rank=10.869, P=0.001). After adjustment for baseline variables including demographics and biologic data, the increased risk of in-hospital mortality in low HDL-C group was substantially attenuated and showed no significant difference (adjusted hazard ratio, 1.23; 95% confidence interval, 0.86-1.77; P=0.259). Low HDL-C is strongly but not independently associated with in-hospital mortality in patients with AAD.


Subject(s)
Acute Disease , Adult , Aged , Alanine Transaminase , Blood , Aneurysm, Dissecting , Blood , Diagnosis , Mortality , Pathology , Aortic Aneurysm , Blood , Diagnosis , Mortality , Pathology , Biomarkers , Blood , Blood Glucose , Metabolism , Blood Pressure , Blood Urea Nitrogen , Cholesterol, HDL , Blood , Cholesterol, LDL , Blood , Creatinine , Blood , Female , Hospital Mortality , Humans , Male , Middle Aged , Proportional Hazards Models , Risk Factors , Uric Acid , Blood
4.
Article in English | WPRIM | ID: wpr-250365

ABSTRACT

The aim of the present study is to investigate how cytochrome P450 enzymes (CYP) 2C8-derived epoxyeicosatrienoic acids (EETs) regulate the nuclear factor erythroid 2-related factor 2 (Nrf2) signaling pathway and protect against oxidative stress-induced endothelial injuries in the development and progression of atherosclerosis. In this study, cultured human umbilical vein endothelial cells (HUVECs) were transfected with CYP2C8 or pretreated with exogenous EETs (1 μmol/L) before TNF-α (20 ng/mL) stimulation. Apoptosis and intracellular ROS production were determined by flow cytometry. The expression levels of ROS-associated NAD(P)H subunits gp91 and p47, the anti-oxidative enzyme catalase (CAT), Nrf2, heme oxygenase-1 (HO-1) and endothelial nitric oxide synthase (eNOS) were detected by Western blotting. The results showed that CYP2C8-derived EETs decreased apoptosis of HUVECs treated with TNF-α. Pretreatment with 11, 12-EET also significantly blocked TNF-α-induced ROS production. In addition, 11, 12-EET decreased oxidative stress-induced apoptosis. Furthermore, the ability of 11, 12-EET to protect cells against TNF-α-induced apoptosis via oxidative stress was abrogated by transient transfection with Nrf2-specific small interfering RNA (siRNA). In conclusion, CYP2C8-derived EETs prevented TNF-α-induced HUVECs apoptosis via inhibition of oxidative stress associated with the Nrf2 signaling.


Subject(s)
8,11,14-Eicosatrienoic Acid , Metabolism , Pharmacology , Adaptor Proteins, Signal Transducing , Genetics , Metabolism , Apoptosis , Aryl Hydrocarbon Hydroxylases , Genetics , Metabolism , Atherosclerosis , Genetics , Metabolism , Pathology , Catalase , Genetics , Metabolism , Cytochrome P-450 CYP2C8 , Genetics , Metabolism , Gene Expression Regulation , Heme Oxygenase-1 , Genetics , Metabolism , Human Umbilical Vein Endothelial Cells , Cell Biology , Metabolism , Humans , Membrane Glycoproteins , Genetics , Metabolism , Models, Biological , NADPH Oxidase 2 , NADPH Oxidases , Genetics , Metabolism , NF-E2-Related Factor 2 , Genetics , Metabolism , Nitric Oxide Synthase Type III , Genetics , Metabolism , RNA, Small Interfering , Genetics , Metabolism , Reactive Oxygen Species , Metabolism , Signal Transduction , Tumor Necrosis Factor-alpha , Metabolism , Pharmacology
5.
Article in English | WPRIM | ID: wpr-351036

ABSTRACT

The clinical characteristics of painless aortic dissection were investigated in order to improve the awareness of diagnosis and treatment of atypical aortic dissection. The 482 cases of aortic dissection were divided into painless group and pain group, and the data of the two groups were retrospectively analyzed. The major clinical symptom was pain in 447 cases (92.74%), while 35 patients (7.26%) had no typical pain. The gender, age, hypertension, hyperlipidemia, diabetes, smoking and drinking history had no statistically significant differences between the two groups (P>0.05). The proportion of Stanford type A in painless group was significantly higher than that in pain group (48.57% vs. 21.03%, P=0.006). The incidence of unconsciousness in the painless group was significantly higher than that in the pain group (14.29% vs. 3.58%, P=0.011). The incidence of hypotension in painless group was significantly higher than that in pain group for 4.26 folds (P=0.01). Computed tomography angiography (CTA) examination revealed that the incidence of aortic arch involved in the painless group was significantly higher than that in the pain group (19.23% vs. 5.52%, P=0.019). It was concluded that the incidence of painless aortic dissection was higher in Stanford A type patients, commonly seen in the patients complicated with hypotension and unconsciousness. CTA examination revealed higher incidence of aortic arch involvement.


Subject(s)
Adult , Aged , Angiography , Aortic Rupture , Diagnostic Imaging , Epidemiology , Female , Humans , Hypotension , Diagnostic Imaging , Epidemiology , Incidence , Male , Middle Aged , Pain , Diagnostic Imaging , Epidemiology , Retrospective Studies , Tomography, X-Ray Computed , Unconsciousness , Diagnostic Imaging , Epidemiology
6.
Article in English | WPRIM | ID: wpr-636767

ABSTRACT

The clinical characteristics of painless aortic dissection were investigated in order to improve the awareness of diagnosis and treatment of atypical aortic dissection. The 482 cases of aortic dissection were divided into painless group and pain group, and the data of the two groups were retrospectively analyzed. The major clinical symptom was pain in 447 cases (92.74%), while 35 patients (7.26%) had no typical pain. The gender, age, hypertension, hyperlipidemia, diabetes, smoking and drinking history had no statistically significant differences between the two groups (P>0.05). The proportion of Stanford type A in painless group was significantly higher than that in pain group (48.57% vs. 21.03%, P=0.006). The incidence of unconsciousness in the painless group was significantly higher than that in the pain group (14.29% vs. 3.58%, P=0.011). The incidence of hypotension in painless group was significantly higher than that in pain group for 4.26 folds (P=0.01). Computed tomography angiography (CTA) examination revealed that the incidence of aortic arch involved in the painless group was significantly higher than that in the pain group (19.23% vs. 5.52%, P=0.019). It was concluded that the incidence of painless aortic dissection was higher in Stanford A type patients, commonly seen in the patients complicated with hypotension and unconsciousness. CTA examination revealed higher incidence of aortic arch involvement.

7.
Chinese Journal of Cardiology ; (12): 315-319, 2013.
Article in Chinese | WPRIM | ID: wpr-291979

ABSTRACT

<p><b>OBJECTIVE</b>To evaluate the inhibitory effect and related mechanism of bradykinin on mechanical stress induced myocardial hypertrophy.</p><p><b>METHODS</b>Neonatal rat cardiomyocytes were isolated and cultured in silicon plates. All cardiomyocytes were randomly divided into three groups: control group, mechanical stretch group (mechanical stretch of silicon plates to 120% for 30 min) and mechanical stretch plus bradykinin group (1×10(-8) mol/L for 24 h before stretch). The protein synthesis and surface area of cardiomyocytes were detected by [(3)H] leucine incorporation and immunofluorescence of α-MHC, respectively. mRNA expression of atrial natriuretic peptide (ANP) and sarcoplasmic reticulum Ca(2+)-ATPase (SERCA2) was detected by real time-PCR, the phosphorylation of calcineurin (CaN), the expression of Angiotensin II receptor 1 (AT1R) and angiotensin converting enzyme (ACE)by Western blot.</p><p><b>RESULTS</b>The surface area of cardiomyocytes of mechanical stretch group [(973 ± 103) µm(2)] was significantly enlarged than in control group [(312 ± 29) µm(2)] and this effect could be partly attenuated by bradykinin [(603 ± 74) µm(2), all P < 0.05]. Mechanical stretch also significantly increased the protein synthesis, up-regulated the expression of ANP and decreased the expression of SERCA2, and these effects could be partly reversed by pretreatment with bradykinin. Moreover, bradykinin partly abolished the mechanical stretch-induced increases in CaN phosphorylation, up-regulation of AT1R but preserved the expression of ACE.</p><p><b>CONCLUSIONS</b>Bradykinin significantly attenuates mechanical stretch-induced myocardial hypertrophy through inhibition of Ca(2+)/CaN pathway.</p>


Subject(s)
Animals , Bradykinin , Pharmacology , Calcineurin , Metabolism , Calcium , Metabolism , Cell Enlargement , Cells, Cultured , Myocytes, Cardiac , Metabolism , Pathology , Rats , Stress, Mechanical
8.
Chinese Journal of Cardiology ; (12): 455-459, 2010.
Article in Chinese | WPRIM | ID: wpr-341193

ABSTRACT

<p><b>OBJECTIVE</b>To investigate the effects of visfatin on the MMP-2 and MMP-9 expressions in human monocytes and related mechanisms.</p><p><b>METHODS</b>Human monocytes were isolated from blood, the expressions of MMP-2 and MMP-9 at mRNA and protein levels were detected in visfatin stimulated monocytes (0, 100, 200, 400 ng/ml) in the absence and presence of NF-kappaB inhibitor specific Bay11-7082 by Realtime PCR or Western blot, the MMP-2 and MMP-9 enzyme activity in the culture media was also detected by Gelatin Zymography. The NF-kappaB protein level and NF-kappaBp65 expression in visfatin stimulated cells were measured by Western blot and ELISA, respectively.</p><p><b>RESULTS</b>Visfatin upregulated MMP-2 and MMP-9 expressions in human monocytes in a dose dependent manner. After treatment with visfatin 400 ng/ml for 24 h, comparing with the free visfatin treatment, the protein expressions of MMP-2 and MMP-9 were up-regulated to 1.644 +/- 0.052 and 3.578 +/- 0.081 (all P < 0.001); the enzyme activities of MMP-2 and MMP-9 were enhanced by 1.661 +/- 0.036 (P < 0.001) and 1.662 +/- 0.100 (P < 0.001). NF-kappaB was also activated in these cells by visfatin and these effects could be significantly attenuated by Bay11-7082. Visfatin induced a dose-dependent (100 - 400 ng) increase of NF-kappaBp65 nuclear translocation from 0.763 +/- 0.056 to 1.290 +/- 0.065 at 100 and 400 ng/ml, comparing with free visfatin treatment 0.467 +/- 0.046 (all P < 0.05). Bay11-7082 decreased the protein expression of MMP-2 and MMP-9 to 1.183 +/- 0.030 and 2.024 +/- 0.056 (all P < 0.001 comparing with 400 ng/ml visfatin treatment).</p><p><b>CONCLUSION</b>Visfatin enhanced the expression and activity of MMP-2 and MMP-9 in human monocytes via activating NF-kappaB signaling pathway.</p>


Subject(s)
Cells, Cultured , Gene Expression Regulation , Humans , Matrix Metalloproteinase 2 , Metabolism , Matrix Metalloproteinase 9 , Metabolism , Monocytes , Metabolism , NF-kappa B , Metabolism , Nicotinamide Phosphoribosyltransferase , Pharmacology , Nitriles , Pharmacology , Signal Transduction , Sulfones , Pharmacology , Up-Regulation
9.
Chinese Journal of Cardiology ; (12): 537-541, 2009.
Article in Chinese | WPRIM | ID: wpr-236459

ABSTRACT

<p><b>OBJECTIVE</b>To investigate the efficacy of CD151 gene delivery in promoting blood perfusion in swines after myocardial infarction.</p><p><b>METHODS</b>Swines received coronary artery ligation and intramyocardial injection with rAAV-CD151, rAAV-anti-CD151 or rAAV-GFP. Eight weeks after vector injection, Western blot, immunostaining and 13N-labeled NH3 PET were performed to detect gene expression and biological effects of various treatments.</p><p><b>RESULTS</b>High level of CD151 protein expression was detected in the rAAV-CD151 group. The capillary density in the rAAV-CD151 group [(83.8 +/- 6.7) n/mm2] was significantly higher than that in the control group [(33.2 +/- 4.5) n/mm2] and rAAV-GFP group [(41.6 +/- 5.6) n/mm2] (all P<0.05); the arteriole density in the rAAV-CD151 group [(16.4 +/- 2.5) n/mm2] was also higher than that in the control group [(6.6 +/- 2.3) n/mm2] and the rAAV-GFP group [(8.4 +/- 1.6) n/mm2] (all P<0.05). However, the lowest capillary density and arteriole density were evidenced in rAAV-anti-CD151 group. Myocardial blood perfusion was significantly increased in rAAV-CD151 group and significantly reduced in rAAV-anti-CD151 group (all P<0.05 vs. control).</p><p><b>CONCLUSION</b>Intramyocardial injection of rAAV-CD151 could enhance the myocardial express of CD151 protein, increase capillary and arteriole densities and improve blood perfusion in swine with myocardial infarction.</p>


Subject(s)
Animals , Antigens, CD , Genetics , Coronary Occlusion , Therapeutics , Dependovirus , Genetics , Female , Gene Transfer Techniques , Genetic Therapy , Genetic Vectors , Humans , Male , Myocardial Infarction , Therapeutics , Neovascularization, Physiologic , Swine , Swine, Miniature , Tetraspanin 24 , Treatment Outcome
10.
Chinese Journal of Cardiology ; (12): 548-551, 2007.
Article in Chinese | WPRIM | ID: wpr-307250

ABSTRACT

<p><b>OBJECTIVE</b>To analyze the clinical features and outcome of patients with noncompaction of ventricular myocardium (NVM).</p><p><b>METHODS</b>Clinical manifestations, electrocardiograms and echocardiographies data were analyzed in 18 patients with NVM. Mean follow-up period was (11 +/- 5) months.</p><p><b>RESULTS</b>The patients aged from 1.5 to 71 years, 66.7% patients were males, familial history was observed in 2 cases, congestive heart failure was present in 14 cases, thromboembolic event occurred in 1 patient, arrhythmia induced syncopes were diagnosed in 2 patients and 1 patient was asymptomatic. Abnormal electrocardiograms were observed in all patients, including premature ventricular beats (7 cases), heart block (4 cases), and atrial fibrillations (4 cases). Echocardiographies showed that noncompaction of ventricular myocardium localized in the left ventricle in 17 patients, and right ventricle in 1 patient. The extension of noncompaction myocardium was predominantly at the apex (72%). N/C was 2.3 - 3.1. EF was less than 50% in 15 patients. Hypokinetic movements were observed in both noncompacted and compacted segments. During the follow-up, 1 patient with congestive heart failure received heart transplantation. ICD was implanted in one patient due to ventricular tachycardia. One patient suffered from sudden cardiac death.</p><p><b>CONCLUSIONS</b>The most common clinical presentations of NVM are congestive heart failure, cardiac arrhythmias, and thromboembolism. Echocardiography is considered as the best tool for the diagnosis of NVM. ICD, heart transplantation and anticoagulation therapy could improve the prognosis of patients with NVM in selected cases.</p>


Subject(s)
Adolescent , Adult , Aged , Arrhythmias, Cardiac , Diagnosis , Cardiomyopathies , Diagnosis , Diagnostic Imaging , Child , Child, Preschool , Echocardiography , Female , Heart Failure , Diagnosis , Heart Ventricles , Congenital Abnormalities , Humans , Infant , Male , Middle Aged , Myocardium , Pathology , Young Adult
11.
Chinese Medical Journal ; (24): 1825-1829, 2004.
Article in English | WPRIM | ID: wpr-257352

ABSTRACT

<p><b>BACKGROUND</b>Transforming growth factor-beta (TGF-beta) and matrix metalloproteinases-9 (MMP-9) have been implicated in the pathogenesis of human atherosclerosis but their relationship during lesion progression are poorly understood. The objective of this study was to investigate the expression of MMP-9, TGF-beta1 and TGF-beta receptor I (TbetaR-I) in human atherosclerotic plaque and their relationship and plaque stability.</p><p><b>METHODS</b>Specimens of human coronary artery atherosclerotic plaques were obtained from 41 patients undergoing coronary endarterectomy, and were paraffin embedded, sectioned at 4 microm intervals then stained with haematoxylin and eosin. They were divided into stable (with no or only little lipid core) and unstable plaque groups (with lipid core size > 40%): the immunohistochemical staining were performed for MMP-9, TGF-beta1 and TbetaR-I.</p><p><b>RESULTS</b>The expression of MMP-9 in the unstable plaques was much higher than in the stable ones, but the expression of TGF-beta1 was higher in the stable plaques. There was no similar significant difference for TbetaR-I. Correlation analysis showed that there was a negative correlation between the expression of MMP-9 and TGF-beta1 (r = -0.332, P = 0.034 for average areal density; r = -0.373, P = 0.016 for average optical density).</p><p><b>CONCLUSIONS</b>There were close relationships between MMP-9, TGF-beta1 and plaque stability. Enhanced production of MMP-9 may participate in the formation of unstable plaque, while TGF-beta1 maybe an important stabilizing factor in preventing transition into an unstable plaque phenotype.</p>


Subject(s)
Activin Receptors, Type I , Coronary Artery Disease , Metabolism , Pathology , Extracellular Matrix , Metabolism , Female , Humans , Immunohistochemistry , Male , Matrix Metalloproteinase 9 , Middle Aged , Protein-Serine-Threonine Kinases , Receptors, Transforming Growth Factor beta , Transforming Growth Factor beta , Transforming Growth Factor beta1
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