Time filter

Source Type

Zheng J.,Center for Cardiovascular Diseases | Yao Y.,Peking University | Han L.,Capital Medical University | Xiao Y.,Capital Medical University
Pediatric Nephrology | Year: 2013

Background: The aim of this study was to investigate renal function and injury in infants and young children with congenital heart disease (CHD). Methods: We prospectively enrolled 58 CHD children aged ≤3 years and 20 age-matched controls and divided these into four groups: Group I, acyanotic CHD (n=24); Group II, cyanotic CHD with arterial oxygen saturation of >75 % (n=20); Group III, cyanotic CHD with arterial oxygen saturation of ≤75 % (n=14); Group IV, normal controls (n=20). Urinary levels of microalbumin (MA), N-acetyl-β-D-glucosaminidase (NAG), and α1-microglobulin (α1-MG) corrected by creatinine (UCr) were compared. Results: Children with CHD had elevated urinary α1-MG/UCr levels, with Group III children having the highest level. Groups I and III children had higher urinary NAG/UCr levels than those of Groups II and IV. Urinary MA/UCr levels in the three patient groups were comparable and significantly higher than that in the control group. A α1-MG×100/ (α1-MG+MA) of <15 %, indicative of glomerular damage, was present in two patients in Group I and one in Group III, but none in Group II. Conclusions: Tubular injury can occur in CHD patients during infancy and early childhood. Among our patient cohort, it was most prominent in children with severe cyanosis. Glomerular injury was detected in some individuals with advanced heart failure or severe cyanosis. © 2012 IPNA.

Wiemer M.,Ruhr University Bochum | Degenhardt R.,Clinical Research Institute | Vallbracht C.,Center for Cardiovascular Diseases | Horstkotte D.,Ruhr University Bochum | And 5 more authors.
Journal of Interventional Cardiology | Year: 2010

Background and Objectives: Paclitaxel-coated stents have proven their efficacy for reducing restenosis in de novo coronary artery lesions and in-stent restenoses with superiority compared to bare metal stents. This study was performed to evaluate the procedural and 1 year results of the Paclitaxel-eluting Coroflex™ Please stent in coronary artery lesions. Methods: One-hundred and twenty-nine patients (66.2 ± 8.2 years, 31.0% diabetics, 20.2% unstable angina, 41.8% multivessel disease) were enrolled per protocol for elective single stent deployment into native de novo or post-PTCA restenotic coronary lesions.The mean reference diameter was 2.84 ± 0.43 mm, the lesion length 12.51 ± 4.6 mm, and the minimal lumen diameter 0.75 ± 0.29 mm. Follow-up was performed clinically in 129129 (100%) after 6 and 12 months and angiographically in 120129 (93%) patients after 6 months. Results: The success rates of the procedure and deployment were 100% and 95.3%, respectively. The in-stent late loss and the late-loss index were 0.27 ± 0.59 mm and 0.17 ± 0.40 resulting in binary in-stent restenoses in 16120 (13.3%) subjects and in-segment restenoses in 20120 (16.7%) subjects. Major adverse cardiac events occurred in 23129 (17.8%) during the first 6 months of follow-up with 3129 (2.3%) myocardial infarctions, 1129 (0.8%) secondary to stent thrombosis. From 6 to 12 months, 2129 (1.6%) nonlesion related PCI were performed. Conclusion: The data of the Paclitaxel-eluting Coroflex™ Please stent evaluated in PECOPS II are within the range of the other currently available Paclitaxel-eluting stent. © 2010, Wiley Periodicals, Inc.

Savic Z.N.,Institute of Radiology | Davidovic L.B.,Center for Cardiovascular Diseases | Sagic D.Z.,Center for Cardiovascular Diseases Dedinje | Brajovic M.D.,Center for Cardiovascular Diseases Zvezdara | Popovic S.S.,Institute of Endocrinology
TheScientificWorldJournal | Year: 2010

The aim of this paper was to examine the correlation between the Color Doppler ultrasound (CD-US) and multidetector CT angiography (MDCTA) diagnostic methods, and to define the degree and extent of stenosis in patients with internal carotid artery stenosis. This was a cross-sectional study with a consecutive series of patients. All US examinations were always carried out by the same physician-angiologist, while all CT examinations were always carried out by the same physician-radiologist. Both worked independently from each other. The stenosis area was measured at the narrowest point by NASCET criteria for US/CT. Peak systolic velocity (PSV) over 210 cm/sec and end diastolic velocity (EDV) over 110 cm/sec criteria were applied for stenoses with lumen narrowed over 70%, while PSV under 130 cm/sec and EDV under 100 cm/sec criteria were applied for those with lumen narrowed under 70%. A total of 124 carotid arteries were observed; namely, 89 narrowed and 68 surgically treated. All patients were reviewed by US and then by MDCTA; patients with 70-99% stenosis underwent surgery. The correlation coefficient between stenosis degree measured by US and MDCTA was 0.922; p < 0.01. The average difference between US and MDCTA diagnostic methods was 3% (Z = -1.438, p > 0.05). The US and CT matching level for stenoses from 70 to 99% was very high (κ = 0.778, p < 0.01). In conclusion, there is a highly significant statistical correlation among both diagnostic methods when measuring stenosis degree and extent. US is more dependent on the physician, while MDCTA is more objective and independent from the physician. We think it would be appropriate to undertake an MDCTA exam for those patients who are candidates for carotid endarterectomy. ©2010 with author. Published by TheScientificWorld.

Shimazaki N.,Keio University | Hayashi T.,Keio University | Kunio M.,Keio University | Igami Y.,Keio University | And 2 more authors.
2010 Annual International Conference of the IEEE Engineering in Medicine and Biology Society, EMBC'10 | Year: 2010

We proposed a novel laser-driven short-term heating angioplasty to realize restenosis-suppressive angioplasty for peripheral artery disease. In this study, we investigated the chronic intimal hyperplasia formation after the short-term heating dilatation in vivo, as well as the thermal damage calculation on arterial smooth muscle cells (SMCs). The prototype short-term heating balloon catheter with 5.0, 5.5, 6.0 mm φ in balloon diameter and 25mm in balloon length were employed. The short-term heating dilatation was performed in porcine iliac arteries with dilatation conditions of 75° (N=4) and 65° (N=5) as peak balloon temperature, 18± 4s as heating duration, 3.5atm as balloon dilatation pressure. Four weeks after the balloon dilatation, the balloon-dilated artery segments were extracted and were stained with HE and picrosirius red for histological observation. In the case of 75° as the peak balloon temperature, neointimal hyperplasia formation was significantly reduced. In this case, the SMCs density in the artery media measured from the HE-stained specimen was 20% lower than that in the reference artery. According to the thermal damage calculation, it was estimated that the SMCs lethality in artery media after the short-term heating angioplasty was 20% in the case of 75° as the peak balloon temperature. We demonstrated that the short-term heating dilatation reduced the number of SMCs in artery media. We think this SMCs reduction might contribute to the suppression of chronic neointimal hyperplasia. © 2010 IEEE.

Li N.,China Japan Friendship Hospital | Cheng W.,Center for Cardiovascular Diseases | Huang T.,China Japan Friendship Hospital | Yuan J.,Beijing University of Chinese Medicine | And 2 more authors.
PLoS ONE | Year: 2015

Previous research on vascular calcification has mainly focused on the vascular intima and media. However, we show here that vascular calcification may also occur in the adventitia. The purpose of this work is to help elucidate the pathogenic mechanisms underlying vascular calcification. The calcified lesions were examined by Von Kossa staining in ApoE -/- mice which were fed high fat diets (HFD) for 48 weeks and human subjects aged 60 years and older that had died of coronary heart disease, heart failure or acute renal failure. Explant cultured fibroblasts and smooth muscle cells (SMCs) were obtained from rat adventitia and media, respectively. After calcification induction, cells were collected for Alizarin Red S staining. Calcified lesions were observed in the aorta adventitia and coronary artery adventitia of ApoE-/-mice, as well as in the aorta adventitia of human subjects examined. Explant culture of fibroblasts, the primary cell type comprising the adventitia, was successfully induced for calcification after incubation with TGF-β1 (20 ng/ml) + mineralization media for 4 days, and the phenotype conversion vascular adventitia fibroblasts into myofibroblasts was identified. Culture of SMCs, which comprise only a small percentage of all cells in the adventitia, in calcifying medium for 14 days resulted in significant calcification. Vascular calcification can occur in the adventitia. Adventitia calcification may arise from the fibroblasts which were transformed into myofibroblasts or smooth muscle cells. © 2015 Li et al.

Discover hidden collaborations