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Search Results: 1 - 10 of 400724 matches for " M Zamirian "
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The incidence of late stent thrombosis after successful cypher stent implantation
Amir Aslani,MB Sharifkazemi,M Zamirian
Iranian Cardiovascular Research Journal , 2007,
Abstract: Background: Stent thrombosis is a rare but devastating complication ofcoronary stent implantation. Coronary stent deployment is associated with a lowincidence of acute and sub-acute thrombosis. However, late stent thrombosis hasbeen recognized clinically. The aim of this prospective study was to evaluatethe incidence of late stent thrombosis in patients receiving sirolimus-elutingstents.Patients and Methods: One hundred patients (132 lesions) who underwentimplantation of sirolimus eluting stents were selected. All patients werepre-medicated with 325 mg of aspirin, which was continued indefinitely.Anti-thrombotic regimens, including intravenous heparin and a loading dose ofclopidogrel (300 mg) were given in the catheterization laboratory andclopidogrel 75 mg/day was continued for at least 6 months. In patients allergicto clopidogrel, ticlopidine at a dose of 250 mg twice daily was prescribed as asubstitute. Late stent thrombosis was defined as myocardial infarctioncharacterized by anginal symptoms with ST-elevation on the electrocardiogram andcreatine kinase-MB elevation >3 times the upper limit of normal withangiographic documentation of partial or total stent occlusion more than 30 daysafter sirolimus eluting stent implantation (while the stented segment was theculprit lesion).Results: Complete 2 year follow-up was available for all patients.Between 30 days to 2 years after sirolimus-eluting stent implantation, 2patients (2%) experienced late stent thrombosis at a mean time of 420 days(range 360 to 480).Conclusions: This study reports a very late stent thrombosis after 20months of sirolimus eluting stent implantation and 15 months after cessation ofclopidogrel treatment, despite continued aspirin administration. This study alsoimplies the possible need for long term antiplatelet therapy among patientsreceiving sirolimus eluting stents.
Predictive Value of Cardiovascular Risk Factors for Risk Assessment in Cohort of Shiraz Heart Study
MJ ZibaeeNezhad,MA Babaee Bigi,Sh Khosropanah,M Zamirian
Iranian Cardiovascular Research Journal , 2010,
Abstract: Background: Risk assessment for fast growing burden of cardiovascular diseases is very important and dif- ficult. As a response to this challenge, in particular, genetic risk factors which potentially modify risk, we conducted a survey of primary data registry of Shiraz Heart Study on integration and application of family history data in prevention of cardiovascular disorders.Method: This study is a longitudinal cohort project to be extended from subpopulations of different job groups to the community.Results: Parental family history of MI, diabetes mellitus (DM), hyperlipidemia (HPL), hypertension (HTN) was reported more frequently among females than males. Histories of MI, DM, HPL, and HTN in both parents were respectively positive in 2.6%, 2%, 4.6%, and 7.9 % of the participants. Odd ratios (OR) for risk of MI from family history of MI were 2.7; risk of DM from family history of DM 4.5; risk of HPL from family history of HPL 2.04; and risk of HTN from family history HTN 4.7. Also, family history of MI modifies risk of HPL (OR=1.7, P<0.0001); and family history of DM modifies risk of HPL (OR=2.04, P<0.0001).Conclusion: Our primary result shows potent application of family history data in risk assessment of cardiovascular outcome. In particular, HTN appears as a silent and leading risk modifier. In regard to the course of continuing Shiraz Heart Study integration of family history of risk factors crucial in public health we suggest to adopt a network of electronic health records from the “Health House” to the “Heart House”.
Path Planning for Mobile Objects in Four-Dimension Based on Particle Swarm Optimization Method with Penalty Function
Yong Ma,M. Zamirian,Yadong Yang,Yanmin Xu
Mathematical Problems in Engineering , 2013, DOI: 10.1155/2013/613964
Nandrolone- induced myocardial infarction in a professional soccer player
MB Sharifkazemi,J Kojury,S Shahrzad,M Zamirian
Iranian Cardiovascular Research Journal , 2007,
Abstract: Androgenic Anabolic Steroids (AAS) are often used by athletes for enhancing athletic performance but are strongly associated with detrimental cardiovascular effects including sudden cardiac death1. Herein, we present a 24 year-old professional soccer player who suffered acute myocardial infarction after nandrolone consumption
Relationship Between Periodontal Disease and Acute Myocardial Infarction
M Zamirian,S Raoofi,H Khosropanah,R Javanmardi
Iranian Cardiovascular Research Journal , 2008,
Abstract: Background: Conventional risk factors for coronary artery disease and myocardial infarction do not explain all of the clinical and epidemiological features of the disease. Periodontal disease is a common bacterial and destructive disorder of oral tissues. Many studies demonstrate close association between chronic periodontitis and development of generalized inflammation, vascular endothelial injury, and atherosclesis. Periodontal disease has been convincingly emerging as an important independent risk factor for ischemic heart disease. A case - control study was carried out to assess the prevalence of periodontitis in patients with Acute myocardial Infarction (AMI) and evaluate the possible relationship between AMI and chronic periodontitis. Patients and Methods: A number of 160 patients, aged 35 to 70 years old, enrolled in the study. Eighty patients (43 men, 37 women) were examined four days after hospitalization due to AMI. Control group consisted of 80 persons (38 men, 42 women) with normal coronary angiography. The following periodontal parameters were examined: Plaque index (PI), gingiral index (GI), bleeding on probing (BOP), probing depth (PD), clinical attachment loss (CAL) and number of sites with CAL.Results: The case, compared to control showed significantly worse results for some periodontal variables studied: The mean of PD and PD > 3 mm, CAL, and number of sites with CAL, had worse results compared to control despite similar oral hygiene and frequency of brushing. The confounding factors for the present study were found to be hypertension and diabetes. Conclusion: The association between periodontitis and acute myocardial infarction was significant after adjusting for conventional risk factors for AMI.
Pulmonary Complications in Cirrhotic Candidates for Liver Transplantation
Seiyed Mohammad Ali Ghayumi,Samrad Mehrabi,Mahmood Zamirian,Javad Haseli
Hepatitis Monthly , 2010,
Abstract: Background and Aims: The determination of the prevalence of cardiopulmonary complications at a liver transplant center in Iran.Methods: Ninety-nine patients (61 male and 38 female) with a mean age of 36.5 (15-66) years with proven cirrhosis were enrolled in this study. Patients with primary cardiac disease, current smokers, those with sepsis, hepatocellular carcinoma, recently ruptured esophageal varices and chronic pulmonary or renal diseases were excluded from the study. Sixty-nine patients had ascites. Forty-four patients had grade C Child-Pugh classification. All patients were evaluated for respiratory function by chest X-ray (CXR), room air arterial blood gas, simultaneous pulse oximetry, cardiac echocardiography and spirometry. Results: Sixty-one patients (66.1%) had a widened alveolar-arterial O2 difference ( > 20 mmHg); 14 (14.1%) had hy- poxemia; 6 (6.1%) had mean pulmonary arterial pressure (MPAP) = 25-40 mmHg; 12 (12.1%) had tricuspid regurgita- tion; pleural effusion and lung restriction were detected in 4 (4%) and 50 (50.5%), respectively. P(A-a)O2 was nega- tively associated with pulmonary hypertension (P < 0.03) and tricuspid regurgitation (P < 0.005). Portal hypertension and portal vein thrombosis were detected in 91 and 8 patients, respectively. Conclusions: A widened alveolar-arterial oxygen difference was common in our patients, but hypoxemia occurred in 14% of patients. Portopulmonary hypertension was preponderant in those patients of male gender.
Cardiac MRI, How Much can be Performed on a 1.5T Magnet with Basic Cardiac Sequences?
Sepideh Sefidbakht*,Mohammad Hosein Nikoo,Mohammad Ali Babai Beigi,Mahmood Zamirian
Iranian Journal of Radiology , 2012,
Abstract: Background/Objective: To present our first 8-month experience with cardiac MRI (1.5T, Siemens Avanto magnet, Argus viewer) spectrum of local referrals and outcomes.Materials and Methods: The population included 24 patients, (five female, 19 male) reffered for evaluation of possible arrhythmogenic right ventricular dysplasia (ARVD) (11), myocarditis (5), ischemic scar (2) and miscellaneous cases (6) including myocardial cyst, papillary muscle lipoma, straight back syndrome (ruling out absent pericardium), possible pericarditis, Brugada syndrome and one case of later biopsy proven cardiac amyloidosis. Retrorecon, truFisp cine images were obtained in SA, 2 and 4 chamber views. T1 flash images were taken with/ without fat-saturation. T2HASTE and SA STIR images were obtained. Postcontrast delayed enhancement images were taken (PSIR tFla or Trufisp). Dynamic perfusion images were obtained in two cases. For DE images, TI 160-360 was manually selected one image at a time and optimal myocardial nulling was selected visually and subjectively. Results: Out of 11 patients reffered for possible ARVD, four patients showed regional dys/akinesia; with an EF<40% this was considered a major criterion. Three of the mentioned patients as well as two patients without obvious dyskinesia showed delayed RV freewall enhancement. Out of five patients referred with possible myocarditis, three showed patchy subepicardial enhanecement which confirmed the diagnosis, and two showed nonspecific transmural edema and/or enhancement. Ischemic scar was observed in two.Conclusion: Although far less than perfect, the basic MRI sequences provided by many vendors on 1.5T magnets can be helpful in selected cases of cardiac disease when referral to centers with a higher level of expertise and equipment is not feasible.
Study of Duct Characteristics Deduced from Low Latitude Ground Observations of Day-Time Whistler at Jammu  [PDF]
M. Altaf, M. M. Ahmad
International Journal of Astronomy and Astrophysics (IJAA) , 2013, DOI: 10.4236/ijaa.2013.33032

Propagation characteristics of low latitude whistler duct characteristics have been investigated based on day-time measurements at Jammu. The morphogical characteristics of low latitude whistlers are discussed and compared with characteristics of middle and high latitude whistlers. The Max. electron density (Nm) at the height of the ionosphere obtained from whistler dispersion comes out to be higher than that of the background which is in accordance with the characteristics of whistler duct. The equivalent width is found to be close to the satellite observations and the characteristics of whistler duct in low latitude ionosphere are similar to those in middle and high latitude ionosphere. The width of ducts estimated from the diffuseness of the whistler track observed during magnetic storm is found to lie in the range of 50 - 200 Km.

Review Article: Immobilized Molecules Using Biomaterials and Nanobiotechnology  [PDF]
Magdy M. M. Elnashar
Journal of Biomaterials and Nanobiotechnology (JBNB) , 2010, DOI: 10.4236/jbnb.2010.11008
Abstract: Immobilized molecules using biomaterials and nanobiotechnology is a very interesting topic that touching almost all aspects of our life. It uses the sciences of biology, chemistry, physics, materials engineering and computer science to develop instruments and products that are at the cutting edge of some of today’s most promising scientific frontiers. In this review article, the author based on his experience in this arena has tried to focus on some of the supports for im-mobilization; the most important molecules to be immobilized such as DNA, cells, enzymes, metals, polysaccharides, etc and their applications in medicine, food, drug, water treatment, energy and even in aerospace. He specified a special section on what is new in the arena of supports and technologies used in enzyme immobilization and finally a recommendation by the author for future work with a special attention to up-to-date references.
Using of the generalized special relativity (GSR) in estimating the neutrino masses to explain the conversion of electron neutrinos  [PDF]
M. H. M. Hilo
Natural Science (NS) , 2011, DOI: 10.4236/ns.2011.34044
Abstract: In this work the Generalized Special Relativity (GSR) is utilized to estimate masses of some elementary particles such as, neutrinos. These results are found to be in conformity with experimental and theoretical data. The results obtained may explain some physical phenomena, such as, conversion of neutrinos from type to type when solar neutrino reaches the Earth.
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