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Search Results: 1 - 10 of 18698 matches for " Ali Vasheghani Farahani "
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Radiofrequency Catheter Ablation of Atrioventricular Nodal Reentrant Tachycardia: Success Rates and Complications during 14 Years of Experience
Ahmad Yaminisharif,Gholamreza Davoodi,Ali Kasemisaeid,Ali Vasheghani Farahani
Journal of Tehran University Heart Center , 2010,
Abstract: Background: Radiofrequency catheter ablation (RFCA) has been introduced as the treatment of choice for supraventricular tachycardia. The aim of this study was to evaluate the success rate as well as procedural and in-hospital complications of RFCA for the treatment of atrioventricular nodal reentrant tachycardia (AVNRT).Methods: Between March 1995 and February 2009, 544 patients (75.9% female, age: 48.89 ± 13.19 years) underwent 548 RFCAs for AVNRT in two large university hospitals. Echocardiography was performed for all the patients before and after the procedure. Electrocardiograms were recorded on digital multichannel systems (EP-Med) or Bard EP system. Anticoagulation was initiated during the procedure.Results: From the 548 patients, 36 had associated arrhythmias, atrial flutter (4%), atrial fibrillation (0.7%), concurrent atrial fibrillation and atrial flutter (0.7%), and concealed atrioventricular pathway (0.4%). The overall success rate was 99.6%. There were 21 (3.9%) transient III-degree AV blocks (up to a few seconds) and 4 (0.7%) prolonged II- or III-degree AV blocks, 2 (0.25%) of which required permanent pacemaker insertion, 3(0.5%) deep vein thrombosis, and one (0.2%) arteriovenous fistula following the procedure. No difference was observed in the echocardiography parameters before and after the ablation.Conclusion: RFCA had a high success rate. The complication rate was generally low and in the above-mentioned centers it was similar to those in other large centers worldwide. Echocardiography showed no difference before and after the ablation. The results from this study showed that the risk of permanent II or III-degree AV block in patients undergoing RFCA was low and deep vein thrombosis was the second important complication. There was no risk of life-threatening complications.
Statistical Properties of Aftershocks for Ahar-Varzeghan Twin Earthquakes on 11 August 2012, NW Iran, and Investigation of Seismicity of North Tabriz Fault  [PDF]
Jamileh Vasheghani Farahani
International Journal of Geosciences (IJG) , 2018, DOI: 10.4236/ijg.2018.92007
Two earthquakes occurred on 11 August 2012 in East Azerbaijan province, NW Iran with Mw 6.3 at 12:23:15.9 and Mw 6.1; 11 minutes after the first shock at 12:34:34.8 GMT time. In this study, we concentrated on the properties of the aftershock sequences in a duration of 7.5-month time-period data after the main shocks, recorded by Broadband Iranian Network (BIN). We obtained p, c and K parameters with the maximum likelihood method and the occurrence rate was modeled by the modified Omori formula. Besides, we showed that aftershocks of the aftershock in 7 Nov. 2012 (M = 5.6) also decay according to the modified Omori law. We investigated the spatial and temporal variations of b-values before and after the twin earthquakes with Mw 6.3 and Mw 6.1 approximately 20 km around North Tabriz Fault (NTF) in the region from 1996 to 2013 using Iranian Seismological Center (IRSC). We believed that a research of the past 17 years has clearly established that spatial b-value changes and seismicity rate are highly significant and meaningful. Moreover, our research led to a warning for a probable strong motion along NTF for the coming couple of years.
Pre-participation Cardiovascular Screening of Elderly Wrestlers
Ali Vasheghani Farahani,Hossein Asheri,Saeed Alipour,Alireza Amirbeigloo
Asian journal of Sports Medicine , 2010,
Abstract: Purpose: Sudden death of a competitive athlete is a tragedy that is usually caused by a previously unsuspected cardiovascular disease. The aim of this study was to clarify the role of noninvasive testing in pre-participation cardiovascular evaluation of elderly wrestlers.Methods: We included 63 Iranian elderly wrestlers who participated in Tehran international elderly wrestlers’ preparation camping by census method. A questionnaire including past medical and family history as well as coronary risk factors was filled out and then a complete physical examination of the cardiovascular system was done by an internist for all wrestlers. Electrocardiogram (ECG), complete echocardiographic examination and then symptom limited exercise test were performed and reported by the cardiologists who did not know the other examinations results.Results: Exertional dyspnea and typical chest pain (FC=I or II) were present in 5% and 1.7% of the examinees, respectively. There were one or more risk factors in 64.5% of the cases. Cardiovascular examination revealed abnormal heart sounds in 27.1%. ECG showed ischemic changes in 13.6% and premature atrial contractions and premature ventricular contractions in 11.4%. Echocardiography showed mild left ventricular systolic dysfunction in 3.4%, regional wall motion abnormality in 8.5%, valvular disease in 32.3%, diastolic dysfunction in 45.7%, and left ventricular hypertrophy in 16.9% of the cases. Exercise test results were negative, equivocal, positive and highly positive in 70.4%, 15.8%, 5.2%, and 8.6% of cases, respectively.Conclusion: Beside physical examination, pre-participation screening of elderly wrestling athletes with ECG and exercise testing is feasible and recommended in the presence of coronary risk factors or cardiac symptoms. Echocardiography can also be recommended to detect other relevant abnormalities when there is a clue in the standard history, physical examination or ECG.
The Persian, Last 7-day, Long form of the International Physical Activity Questionnaire: Translation and Validation Study
Ali Vasheghani-Farahani,Maryam Tahmasbi,Hossein Asheri,Haleh Ashraf
Asian journal of Sports Medicine , 2011,
Abstract: Purpose:To translate long form, interview-administered International Physical Activity Questionnaire (IPAQ) from English to Persian and evaluate its validity, reliability and reproducibility.Methods:A forward-backward translation procedure was followed to develop the Persian version of the IPAQ. A total of 218 respondents (53.7% women, aged 22-76 yr) completed the Persian version in Tehran, Iran. To examine the test-retest reliability, 48 healthy volunteers completed the IPAQ twice during a 7-day period. . The PA indicators derived from the IPAQ were assessed for reliability and were compared with aerobic fitness and body mass index (BMI) for construct validity.Results:In general, the questionnaire was received well and all domains met the minimum reliability standards (intra-class correlation [ICC]> 0.7), except for Leisure-time physical activity (PA). Aerobic fitness showed a weak positive correlation with all of the PA results derived from the IPAQ. A significant correlation was observed between the IPAQ data for total PA and both aerobic fitness (r=0.33, p < 0.001) and BMI (r=0.26, p < 0.001). Performing a known group comparison analysis, the results indicated that the questionnaire was discriminated well between the subgroups of the study samples expected to be different in their physical activity.Conclusions:The Persian version of the long form, interview-administered IPAQ had an acceptable reliability and validity for assessing total PA in our Iranian sample of individuals. It may be a useful instrument for generating internationally comparable data on PA.
Ablation of Focal Right Upper Pulmonary Vein Tachycardia Using Retrograde Aortic Approach
Ahmad Yamini Sharif,Gholamreza Davoodi,Ali Vasheghani Farahani,Hadi Fadavi
Journal of Tehran University Heart Center , 2010,
Abstract: The use of diagnostic and therapeutic methods for assessing pulmonary vein due to its status as a main source of ectopicbeats for the initiation of atrial dysrrythmias is strongly recommended. We report the case of a 13-year-old girl who wasadmitted to our hospital with the electrocardiogram manifestation of an ectopic atrial tachycardia. The focus of arrhythmia was inside the right upper pulmonary vein. The patient underwent successful ablation with a conventional electrophysiology catheter via the retrograde aortic approach. We showed that when the origin of atrial tachycardia is in the right upper pulmonary vein, it is possible to advance the catheter into this vein via the retrograde aortic approach and find the focus of arrhythmia. This case demonstrates that right upper pulmonary vein mapping is feasible through the retrograde aortic approach and it is also possible to ablate the arrhythmia using the same catheter and approach.
The Effects of a 10-Week Water Aerobic Exercise on the Resting Blood Pressure in Patients with Essential Hypertension
Ali Vasheghani Farahani,Mohammad-Ali Mansournia,Hossein Asheri,Akbar Fotouhi
Asian journal of Sports Medicine , 2010,
Abstract: Purpose: To investigate the effects of a 10-week water aerobic exercise on the resting blood pressure in patients with stage 1 or 2 hypertension referring to Tehran University Clinics. Methods: Forty men with stage 1 or 2 essential hypertension were assigned to two groups of intervention [n=12; aged 48.33 ± 10.74 years (mean ± SD)] and control [n=28; aged 46.96 ± 11.58 years (mean ± SD)]. Subjects in the intervention group participated in a supervised 10-week water aerobic training program of 55 min sessions, 3 days per week on alternate days, while those in the control group were not involved in any regular training program during this period. Blood pressure of the participants was recorded and compared at the beginning and at the end of the study (48 hours after the last training session). Results: Exercise lowered systolic blood pressure and mean arterial pressure by 11.71 (95% confidence interval: 5.07 to 18.35) and 5.90 (95% confidence interval: 1.17 to 10.63) mm Hg respectively. The lowering effect of exercise on diastolic blood pressure was neither statistically significant nor clinically important (0.55 mm Hg; P. value = 0.8). There was no significant effect of age, baseline body mass index and stage of hypertension on the exercise-induced changes in blood pressure. Conclusion: A 10-week course of water aerobic exercise markedly reduced the systolic and mean arterial blood pressure of patients with essential hypertension and is especially recommended for the obese and the elderly who have orthopedic problems or bronchospasm.
Effect of Process Variables on the Production of Polyhydroxyalkanoates by Activated Sludge
Nader Mokhtarani,Hossein Ganjidoust,Ebrahim Vasheghani Farahani
Iranian Journal of Environmental Health Science & Engineering , 2012,
Abstract: Polyhydroxyalkanoates are known to be temporarily stored by microorganisms in activated sludge, especially in anaerobic-aerobic processes. Due to the problems resulted from the disposals of plastic wastes and excess sludge of wastewater treatment plants, the production of polyhydroxyalkanoates by treating activated sludge anddetermining the effect of process variables were the main issues of this paper. In this research, an anaerobic-aerobic sequencing batch reactor was used to make microorganism adapted and a batch aerobic reactor was used for enriching them. The variables affecting polyhydroxyalkanoates production including aeration time, sludge retention time, and volatile fatty acids concentration of the influent in sequencing batch reactor, and also carbon to nitrogenratio and cultivation time in polymer production reactor, were investigated using Taguchi statistical approach to determine optimum conditions. The maximum polymer production of 29% was achieved at sludge retention time of 5–10 days, aeration time of 2 hours, supplementation of 40% of volatile fatty acids in the influent and increasing of carbon to nitrogen ratio of polymer production reactor to above 25 g/g. Based on the results, in optimum conditions, the volatile fatty acids concentration which increased the production of polyhydroxyalkanoates up to 49% was the most effective variable. Carbon to nitrogen ratio, sludge retention time and aeration time were ranked as the next affecting parameters. Although the polyhydroxyalkanoates content achieved in present study is muchlower than that by pure culture, but the proposed method may still serve well as an environmental friendly means to convert waste into valuable product.
Hawking temperature and the emergent cosmic space
M. Hashemi,S. Jalalzadeh,S. Vasheghani Farahani
Physics , 2013,
Abstract: The aim of this work is to model the evolution of the cosmic space based on thermodynamical parameters. The universe is considered to have an apparent horizon radius with a Kodama-Hayward temperature assigned to it. The method is founded on the fact proposed by Padmanabhan [1,2] that the subtraction of the surface and bulk degrees of freedom provides information on the cosmic space emergence. The fact of the matter is that in this approach the Raychaudhuri equation could even be obtained by the consideration of only thermodynamical parameters. As such, the standard general relativity is taken as the starting point where by implementing the standard cosmological equations we obtain a generalized evolutionary equation supporting emergence of the cosmic space. The method proposed in this work would provide basis for other cosmological models to have an emergent perspective.
Enhancement of 2,3-butanediol production by Klebsiella pneumoniae PTCC 1290: Application of Taguchi methodology for process optimization
G Khayati, N Ghaemi, E Vasheghani-Farahani
African Journal of Biotechnology , 2009,
Abstract: 2,3-Butanediol production parameter optimization using Klebsiella pneumoniae PTCC 1290 was performed using the design of experiments available in the form of an orthogonal array and a software for automatic design and analysis of the experiments, both based on Taguchi protocol. Optimal levels of physical parameters and key media components namely temperature, pH, inoculum size, agitation, acetic acid and succinic acid were determined. 2,3-Butanediol production obtained from the 18 sets of fermentation experiments performed with the selected factors and levels were further processed with Qualitek-4 software at bigger is better as quality character. The optimized conditions showed an enhanced 2,3-butanediol production of 35.8% (from 11.856 to 18.459 g l-1). The optimal combinations of factors obtained from the proposed design of experiments methodology was further validated by conducting fermentation experiments and the obtained results revealed an enhanced 2,3-butanediol production of 25.8%. Taguchi approach of design of experiments resulted in evaluating the main and interaction effects of the factors individually and in combination
Precompetetive Cardiovascular Screening in Elderly Wrestlers
H Asheri,A Vasheghani Farahani,V Ziaee,R Alizadeh
Payavard Salamat , 2008,
Abstract: Background and Aim: Sudden death in athletes commonly is due to unknown cardiovascular diseases. Therefore many protocols have designed for screening in the world. In the last years has been spent more attention to sport in elderly athletes and the number of their competitions have been increased. The aim of this study was evaluation of risk factor of cardiovascular diseases in Iranian elderly wrestlers.Materials and Methods: All the members (60 athletes) of Iran team in Elderly Wrestling World Championship 2006 have taken census in the present study. At two sections the cardiovascular health state of them has evaluated: history taking and physical examination, electro-cardiography and exercise test. All date was analyzed by SPSS version 14 and mean and standard deviation for presenting findings.Results: Sixty athletes aged 37 to 78 years (54.65±8.75) with history of exercise from 12 to 55 years (37.8±9.4) have been studied. In the history of 66.7% and in physical examination and history 75.1% athletes had at least one risk factor. Exercise test results of wrestlers were highly positive and positive in 8.6% and 5.2% respectively.Conclusion: We suggest a perfect history taking and a complete physical examination for each athlete at the first step. If you found abnormalities then noninvasive diagnostic testes such as electrocardiography, exercise test and echocardiography will be useful and informative.
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