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Search Results: 1 - 10 of 89160 matches for " Peri?i? Zoran "
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VENDOR SELECTION AND DETERMINING PROCUREMENT QUOTAS IN CONDITIONS WHEN DISCOUNTS ARE OFFERED ON THE TOTAL VALUE OF THE CONTRACTED PROCUREMENT OF MANY DIFFERENT PRODUCTS
Zoran Babi?,Tunjo Peri,Sead Re?i
Human : Research in Rehabilitation , 2012,
Abstract: Vendor selection is a very significant business problem for ensuring the competitiveness on the market. That is why companies pay great attention to this problem. To solve the vendor selection problems can be applied to a number of quantitative methods. Depending on the goals of the company the vendor selection can be a mono-criterion or multi-criterion programming problem. This paper deals with the problem of vendor selection and determining procurement quotas from selected vendors under conditions where vendors offer discounts to the total order value within a specified period where the buyer buys more products from the vendors. The total value of procurement costs in a given period is taken as an optimization criterion. In this paper the specific flour purchase problem is solved for a company that manufactures bakery products.
Receptor modeling studies for the characterization of PM10 pollution sources in Belgrade
Miji? Zoran,Stoji? Andreja,Perii? Mirjana,Raj?i? Slavica
Chemical Industry and Chemical Engineering Quarterly , 2012, DOI: 10.2298/ciceq120104108m
Abstract: The objective of this study is to determine the major sources and potential source regions of PM10 over Belgrade, Serbia. The PM10 samples were collected from July 2003 to December 2006 in very urban area of Belgrade and concentrations of Al, V, Cr, Mn, Fe, Ni, Cu, Zn, Cd and Pb were analyzed by atomic absorption spectrometry. The analysis of seasonal variations of PM10 mass and some element concentrations reported relatively higher concentrations in winter, what underlined the importance of local emission sources. The Unmix model was used for source apportionment purpose and the four main source profiles (fossil fuel combustion; traffic exhaust/regional transport from industrial centers; traffic related particles/site specific sources and mineral/crustal matter) were identified. Among the resolved factors the fossil fuel combustion was the highest contributor (34%) followed by traffic/regional industry (26%). Conditional probability function (CPF) results identified possible directions of local sources. The potential source contribution function (PSCF) and concentration weighted trajectory (CWT) receptor models were used to identify spatial source distribution and contribution of regional-scale transported aerosols. [Projekat Ministarstva nauke Republike Srbije, br. III43007 i br. III41011]
Late thrombosis of coronary bare-metal stent: Case report
Apostolovi? Svetlana,PeriiZoran,Toma?evi? Miloje,Stankovi? Goran
Srpski Arhiv za Celokupno Lekarstvo , 2006, DOI: 10.2298/sarh0604155a
Abstract: Stent thrombosis remains the primary cause of death after percutaneous coronary interventions (PCI). Despite modern concepts of PCI, stent thrombosis occurs in 0.5% -2% of elective procedures and even 6% of patients with the acute coronary syndrome (ACS). Stent thrombosis most often develops within the first 48 hours after the PCI, and rarely after a week of stent implantation. Angiographically documented late (>6 months) thrombosis of coronary bare-metal stent (BMS) is rare, because the stent endothelialization is considered to be completed after four weeks of the intervention. Our patient is a 41 year old male and he had BMS thrombosis 345 days after the implantation, which was clinically manifested as an acute myocardial infarction in the inferoposterolateral localization. Stent Clinical Centre of Serbia, Belgrade thrombosis occurred despite a long term dual antiplatelet therapy and control of known risk factors. Thrombolytic therapy (Streptokinase in a dose of 1 500 000 IU) was not successful in reopening the occluded vessel, so the flow through the coronary artery was achieved by rescue balloon angioplasty, followed by implantation of drug eluting stent in order to prevent restenosis.
Comparative effect of streptokinase and alteplase on electrocardiogram and angiogram signs of myocardial reperfusion in ST segment elevation acute myocardial infarction
Toma?evi? Miloje,Kosti? Tomislav,Apostolovi? Svetlana,PeriiZoran
Srpski Arhiv za Celokupno Lekarstvo , 2008, DOI: 10.2298/sarh0810481t
Abstract: INTRODUCTION Modern pharmacological reperfusion in ST segment elevation acute myocardial infarction means the application of fibrin specific thrombolytics combined with modern antiplatelets therapy dual antiplateles therapy, acetylsalicylic acid and clopidogrel, and enoxaparin. The contribution of each agent has been widely examined in large clinical studies, but not sufficiently has been known about the effects of a combined approach, where the early angiography and percutaneous coronary intervention is added during hospitalization, if necessary. OBJECTIVE The aim of the paper is to compare the effects of streptokinase and alteplase, together with the standard modern adjuvant antiplatelets and anticoagulation therapy (aspirin, clopidogrel, enoxaparin) in patients with ST segment elevation acute myocardial infarction, on electrocardiographic and angiographic signs of the achieved myocardial reperfusion. METHOD The prospective study included 127 patients with the first ST segment elevation acute myocardial infarction who were treated with a fibrinolytic agent in the first 6 hours from the chest pain onset. The examined group included 40 patients on the alteplase reperfusion therapy, while the control 87 patients were on the streptokinase therapy. All the patients received the same adjuvant therapy and all were examined by coronary angiography on the 3rd to 10th day of hospitalization. Reperfusion effects were estimated on the basis of the following: ST segment resolution at 60, 90 and 120 minutes, the appearance of reperfusion arrhythmias at the electrocardiogram, percentage of residual stenosis at the 'culprit' artery, TIMI coronary flow at the 'culprit' artery and the appearance of new major adverse coronary events in the 6-month-follow-up period. RESULTS By analysing the resolution of the sum of ST segment elevation in infarction leading 60 minutes after the beginning of the medication application, we received a statistically significantly higher resolution of ST segment in the group of patients who received alteplase (p<0.05). 60 minutes after the application of thrombolytics, 64% of patients at streptokinase showed the absence of ST segment resolution (<30%), and 32% of patients at alteplase (p<0.0001). Reperfusion arrhythmias as the sign of successful myocardial reperfusion were present in 62.5% of patients at alteplase and in 57.4% of patients at streptokinase, but the difference is not statistically significant. There was no statistically significant difference in the degree of residual stenosis at the 'culprit' artery in the compared groups of p
An alternative approach for endocardial pacemaker lead implantation in patient with persistent left superior vena cava
Mitov Vladimir,PeriiZoran,Kosti? Tomislav,Stojkovi? Aleksandar
Srpski Arhiv za Celokupno Lekarstvo , 2010, DOI: 10.2298/sarh1002085m
Abstract: Introduction. Persistent left superior vena cava represents a congenital vascular defect of the venous system, which often makes standard 58 cm endocardial lead placement impossible. Case Outline. A right chamber approach by the left cephalic vein was tried. This was impossible because standard endocardial lead (SJM Isoflex S 1646T, bipolar lead, 58 cm in length, body diameter 7 French) was too short for this patient. A unipolar lead for coronary sinus (Medtronic ATTEIN 4193-88), 88 cm in length, body diameter 4 French, was placed in the posterior branch of the coronary sinus. With such positioning of the lead, a VVI pacemaker pacing was enabled. The operation lasted for 48 minutes, and the time of total X-ray exposure was 9.6 minutes. The values that were achieved were: threshold 0.3 V, pulse width 0.37 ms, maximum R 22.55 mV. Ten months after the implantation, the values were: thresh- old 0.3 V, maximum R 28.8 mV. Conclusion. Persistent left superior vena cava in some cases makes standard 58 cm endocardial lead placement impossible due to its joining to the right atrium over the dilated coronary sinus. Coronary sinus lead placement in the posterior or lateral coronary sinus branch represents an acceptable alternative approach for pacemaker lead placement in these patients.
Routine Coronary Angiography and Revascularization after Thrombolysis-Impact on One-Year Prognosis
Danijela ?or?evi?-Radojkovi?,Zoran Perii,Svetlana Apostolovi?,Miodrag Damjanovi?
Acta Facultatis Medicae Naissensis , 2010,
Abstract: The most often used reperfusion strategy for patients with STEMI is still thrombolysis, but it is not the end of treatment. The aim of this paper was to show whether routine in-hospital coronary angiography and subsequent revascularization (percutane-ous or surgery) after thrombolysis improve an one-year prognosis in patients with STEMI. The study involved 155 patients, 29-79 years old, with first STEMI. They were treated with fibrinolytic, aspirin, and enoxaparin. Group I (102 patients) underwent coronary angiography on approximately the 5th day of hospitalization, then percutaneously or surgically revascularized if considered appropriate. In group II (53 patients), in-hospital angiography was not done. Mortality, reinfarction, angina and left ventricular systolic function were analyzed during one-year period. Patients in group II were older, they received clopidogrel and statin less frequently and ACE inhibitors more frequently. The groups were significantly different regarding the in-hospital (3% vs. 15%, p=0.008) and one-year mortality (2% vs. 11.1%, p=0.03). There was a numeric trend for higher frequency of reinfarction in group II (3% vs. 11.1%, p=0.06). After one year, more patients in group II had angina (2.9% vs. 13.2%, p=0.03). In hospital, the groups had similar EF (54% vs. 51.2%, ns), but after one year EF in group I was higher (55.2% vs. 47.6%, p=0.02). Multivariable analysis adjusted for age and differences in drug therapy showed that the lack of routine elective coronary angiography and revascularization is an independent predictor of one-year mortality (RR 4.7, p=0.019) and independent predictor of combined mortality, reinfarction and angina (RR 3.2, p=0.028). Routine coronary angiography and revascularization after thrombolysis improve in-hospital and one-year survival, decrease the frequency of reinfarction and angina, and improve the left ventricular function.
ASYMPTOMATIC THROMBOSIS OF V.SUBCLAVIAEIN PATIENT WITH PERMANENT PACEMAKER LEAD
Neboj?a Arsi?,Zoran Perii,Miroslav Stojiljkovi?,Vesna Milojkovi?
Acta Medica Medianae , 2004,
Abstract: Upper extremity deep vein thrombosis can be occur according more different etiological reasons: presence of extraneous body, local infection, slow flow of blood, pressure of neck rib on big veins, etc. By searching a literature we found a presence of v.subclavian thrombosis in patients with permanent pacing system in significant values (apr. 40%), which is mostly clinically dumb“, or asimptomatic. Permanent leed placed through v.subclaviae or v.chepalica represent extraneous body and in this conditions can occur malfunction of coagulation and vein thrombosis.
PERFORATION OF RIGHT VENTRICLE BY ACTIVE FIXATION LEAD OF PERMANENT PACEMAKER - CASE REPORT
Tomislav Kosti?,Zoran Perii,Dragan Mili?,Svetlana Apostolovi?
Acta Medica Medianae , 2010,
Abstract: Ventricular perforation is a rare complication of permanent pacemaker implantation. We report a case of 61-year-old woman with sick sinus syndrome who had the dual chamber pacemaker implanted. Five days after the implantation, the perforation of right ventricle by active ventricular fixation lead was detected. 12-lead surface electrocardiography and multislice chest scan are necessary for detection of rare complications after the pacemaker implantation.
VENTRICULAR FIBRILLATION IN ACUTE MYOCARDIAL INFARCTION - CASE REPORT
Tomislav Kosti?,Zoran Perii,Sonja ?alinger Martinovi?,Svetlana Apostolovi?
Acta Medica Medianae , 2009,
Abstract: Sudden cardiac death poses an immense problem in the middle and highly developed countries because its first expression is at the same time the last one. Ventricle tachycardia, the monomorphous and the polymorphous ones, and ventricular fibrillation are rhythm disorders that are most frequently associated with the phenomenon of sudden cardiac death. Ventricular fibrillation is the most common cause of sudden cardiac death within the first hours of the acute myocardial infarction. A 60-year-old man was admitted to our Clinic from a local hospital due to acute onset of chest pain and ECG signs of anterior ST segment elevation myocardial infarction. He had severe rhythm disturbances, about 70 epizodes of ventricular fibrilation (VF). Due to rhytmical instability of the patient, we decided that along with PCI it was necessary to implant ICD twenty-two days after the first acute coronary event.The ICD implantation ensures the best prevention against sudden cardiac death (secondary and primary) in selected high-risk patients and has no alternative for any medicine known so far. It is significant that, lately, the field of application has extended to indication areas of primary prevention of sudden cardiac death, and especially to development of resynchronization implantable cardioverter defibrillator in the heart failure therapy.
TEMPORARY PACEMAKER LEAD PLACEMENT IN PATIENT WITH PERSISTENT LEFT SUPERIOR VENA CAVA
Vladimir Mitov,Zoran Perii,Aleksandar Joli?,Tomislav Kosti?
Acta Medica Medianae , 2011,
Abstract: Persistent left superior vena cava represents a congenital vascular defect of the venous system, and is usually discovered accidentally. Temporary pacemaker lead placement should be performed under the fluoroscopy control, but also by using the ECG QRS morphology. Echocardiography also represents a reliable noninvasive diagnostic tool for the assessment of temporary pacemaker lead position.
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