Browsing by Author "Yilmaz, Ahmet"

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Cancer Development and Electromagnetic Fields in Near Future
(Aras Part Medical int Press, 2015) Yilmaz, Ahmet; Nart, Maruf; Akan, Zafer
Environmental Radioactivity and High Incidence Rates of Stomach and Esophagus Cancer in the Van Lake Region: a Causal Relationship
(Asian Pacific Organization Cancer Prevention, 2014) Akan, Zafer; Baskurt, Busranur; Asliyuksek, Hizir; Kam, Erol; Yilmaz, Ahmet; Yuksel, Mehmet Bilgehan; Koca, Dogan
This study examined the incidence rates of cancer cases (averages for 2006-2010) and relationships with environmental radioactivity levels. Soil and water samples were collected from provincial and district centers of Van city and the outdoor gamma doses were determined using a portable gamma scintillation detector. Gross alpha and beta, (226)Ra, (232)Th, and (40) K activities were measured in both tap water and soil samples. Although high rates of stomach and esophagus cancers have been reported previously in Van the underlying reasons have not hitherto been defined. Incidences of cancers were highest in the Gurpinar (326.0) and Ozalp (377.1) counties (p<0.001). As to the results of the gross alpha and gross beta radioactivity measurements in the drinking water, these two counties also had high beta radionuclide levels: Gurpinar (140 mBq/dm(3)) and Ozalp (206 mBq/dm(3)). Even if within the normal range, a relation between the higher rate of the incidence of stomach and esophagus cancers with that of the higher rate of beta radionuclide activity was clear. On Spearman correlation analysis, the relation between higher beta radionuclide levels and cancer incidence was found to be statistically significant (p<0.01). According to the results of the analysis, Van residents receive an average 1.86 mSv/y annual dose from outdoor gamma radiation, ingestion of radionuclides in the drinking water, and indoor Rn-222 activity. Moreover, gross alpha and beta activities were found to be extremely high in all of the lakes around the city of Van, Turkey. Further investigations with long-term detailed environmental radiation measurements are needed regarding the relationship between cancer cases and environmental radioactivity in the city of Van.
External Iliac Artery Pseudo-Stenosis Associated With Catheterization: Report of Two Cases
(Termedia Publishing House Ltd, 2012) Karapinar, Hekim; Gul, Ibrahim; Kucukdurmaz, Zekeriya; Gumrukcuoglu, Hasan Ali; Yilmaz, Ahmet
In invasive cardiology practices, the most commonly used vascular access site is the femoral artery. Atherosclerotic stenoses on the femoral and iliac arteries create difficulties in these practices. Vasospasm rarely occurs on large arteries like these. This paper reports stenosis encountered during coronary angiography on iliac arteries in 2 patients. The stenoses caused difficulties for guidewire and catheter insertion in catheterization. In the revisualization of these arteries at the next session, the stenoses had disappeared, but the arteries were tortuous. The patients did not have peripheral ischemia signs previously, nor did they appear after the procedure. These transient stenoses might have occurred due to vasospasm and the accordion effects caused by the guidewire and/or catheter.
Is Atrial Electromechanical Coupling Delayed in Patients With Secundum Atrial Septal Defect
(Wiley-blackwell, 2013) Oflaz, Mehmet Burhan; Karapinar, Hekim; Kucukdurmaz, Zekeriya; Guven, Ahmet Sami; Gumrukcuoglu, Hasan Ali; Sarikaya, Savas; Yilmaz, Ahmet
Background: There is no available published information about the atrial electromechanical coupling time (AEMCT) in patients with atrial septal defect (ASD). The aim of this study was to investigate the relationship between ASD and AEMCT obtained by tissue Doppler imaging (TDI). Methods: A total of 35 patients with ASD and 22 healthy controls were included in the study. The time intervals from the onset of the P-wave on the surface electrocardiogram to the beginning of the late diastolic A-wave (PA) representing AEMCT were obtained from the lateral mitral annulus, septal mitral annulus, and right ventricular (RV) tricuspid annulus, and named PA-lateral, PA-septal, and PA-tricuspid, respectively. The difference between PA-septal and PA-tricuspid, PA-lateral and PA-septal, and PA-lateral and PA-tricuspid were defined as intra-right AEMCT, intra-left AEMCT, and inter-AEMCT, respectively. Results: PA-tricuspid, PA-septal, and PA-lateral values were longer in patients with ASD when compared with the controls, but did not reach statistical significance (39.9 +/- 19.1 vs. 37.2 +/- 15.5, P = 0.952; 49.6 +/- 14.0 vs. 45.4 +/- 11.1, P = 0.826 and 60.3 +/- 16.3 vs. 59.7 +/- 12.5, P = 0.437, respectively). There were no significant differences between the ASD and control groups in terms of inter-atrial, intra-right atrial, and intra-left AEMCT (21.3 +/- 2.3 vs. 20.8 +/- 4.6, P = 0.957; 9.7 +/- 3.3 vs. 6.9 +/- 1.3, P = 0.723 and 13.6 +/- 4.7 vs. 10.9 +/- 4.5, P = 0.518, respectively). Furthermore, ASD diameter and total septum length did not correlate with AEMCT. Conclusion: Both intra-and inter-AEMCT were not increased in patients with ASD than control subjects. In addition, we found no association between the ASD diameter and indices of AEMCT in patients with ASD.
Long Coronary Artery Aneurysm Treated by Two Graft Stents on a Single Bare Metal Stent Scaffold
(Termedia Publishing House Ltd, 2012) Karapinar, Hekim; Kucukdurmaz, Zekeriya; Gumrukcuoglu, Hasan Ali; Yilmaz, Ahmet
We report a case of a 61-year-old male who presented with symptoms of stable angina The coronary angiography revealed a long aneurysm and significant stenosis after the aneurysmatic segment on the circumflex artery. The length of the aneurysm was 21 mm with the largest diameter 9 mm. We thought that single graft stent placement was not possible due to the angled circumflex artery, length of the aneurysm and inflexible nature of graft stents. Distal stenosis was stented as usual. A bare metal stent was implanted over the aneurysm from normal to normal segments. Two graft stents were implanted sequentially in the aneurysm over the bare metal stent scaffold. Stent grafts covered the aneurysm without any main side branch occlusion. The patient was discharged the next day without any complications. The patient was asymptomatic after two years of follow-up with usual medications.