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    Carotid artery plaque structure in the context of symptomatic/asymptomatic nature of carotid artery stenosis
    (Czech Soc Cardiology & Czech Soc Cardiovascular Surgery, 2021) Oztas, Didem Melis; Bilen, Bukem Tanoren; Sener, Leyla Turker; Beyaz, Metin Onur; Ulukan, Mustafa Ozer; Unal, Orcun; Unlu, Mehmet Burcin
    Objective: In this paper, we examined the relationship between atherosclerotic plaque characteristics and symptomatic carotid artery disease. Material and methods: Twenty-two patients who underwent carotid endarterectomy were enrolled into the study. Thirteen patients were male and remaining 9 patients were female. The mean age was 60.2 +/- 9.6 years. The carotid artery stenosis ranged between 75% and 99%. Eight patients were asymptomatic and remaining 14 patients were symptomatic. Ten patients suffered stroke. One of them had recurrent transient ischemic attacks, 4 patients had dizziness, and one of them had amaurosis fugax. The extracted plaques were evaluated by scanning acoustic microscopy (SAM) and micro-computerized tomography (micro-CT). Results: Smaller acoustic impedance values that reveal collagen-rich plaque formation were detected in patients who had stroke, while higher acoustic impedance values that reveal calcium-rich plaque formation were detected in the asymptomatic patients' plaques. Conclusions: Determination of plaque characteristics with modern radiographic techniques, rather than relying on the degree of stenosis in patients with carotid artery disease, may be helpful to discriminate patients requiring intervention.
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    Efficiency of Prophylactic Ablation of the Tributary Venous Pathways Draining Around the Saphenofemoral Junction to Decrease the Rate of Future Varicose Vein and Symptoms Occurence
    (Elsevier Science Inc, 2021) Ulukan, Mustafa Ozer; Karakaya, Atalay; Erkanli, Korhan; Beyaz, Metin Onur; Oztas, Didem Melis; Ugurlucan, Murat
    Background: There are various other collaterals draining into the venous system around the saphenofemoral junction in addition to the great saphenous vein. We aimed to determine the efficiency of prophylactic ablation of tributary veins in long term varicose vein and symptom recurrence. Methods: Two hundred and sixty-three consecutive patients whom underwent radiofrequency ablation therapy for the treatment of superficial venous reflux disease were investigated. There were 129 patients who received isolated great saphenous vein ablation (Group A) where as 134 patients underwent ablation of the other tributary veins in addition to the great saphenous vein (Group B) between June 2015 and January 2017. The tributary superficial veins; refluxing and/or not refluxing, draining into the saphenofemoral junction were selectively catheterized and ablated in Group B. Patients are followed at least 1 year after the procedures regulary and researched for recurrence of varciose veins and symptoms. Results: Gender, mean age, body mass index, diameter of the great saphenous veins, small saphenous vein disease, and grade of deep venous insufficiency did not differ significantly between the two groups. The mean number of tributary veins were similar in both groups (n: 1.9 +/- 0.4 in Group A vs. n: 1.8 +/- 0.7 in Group B) which were detected preoperatively as well as during the procedure. The mean number of ablated tributary venous pathways could be 1.4 +/- 0.6 in Group B. During the follow up period symptoms related with varicose veins recurred in 19 patients in Group A where as in 7 patients in Group B ( P < 0.05). Three of these symptomatic patients in Group B were the ones in whom the tributary pathways could not be catheterized ablated where as 14 patients in Group A were diagnosed with newly refluxing tributary pathways. All the symptomatic patients in both groups were managed medically and/or with additional interventions. Conclusion: The absence of any fascial unsheathing and the parietal weakness are suggestive of a lower resistance of the tributary veins wall, so collapse and size of veins make it more complex to catheterization regarding to great saphenous vein. Ablation of the tributary superficial venous pathways during the treatment of great saphenous vein reflux disease decreased the rate of recurrence of superficial venous reflux disease and patients symtoms in our modest cohort.
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    Identifying the optimal monopolar electrocautery output power in pedicular internal thoracic artery harvesting: 20 or 40 watts?
    (Clinics Cardive Publ Pty Ltd, 2022) Ata, Emin Can; Senturk, Gozde Erkanli; Saygi, Halil Ibrahim; Ulukan, Mustafa Ozer; Ugurlucan, Murat; Erkanli, Korhan; Beyaz, Metin Onur
    Background: Monopolar electrocautery is an important tool for harvesting the pedicular internal thoracic artery (ITA) in cardiac surgery. The different power outputs of cautery may affect graft integrity and long-term patency. This study aimed to identify the optimal threshold of electrocautery power for ITA harvest. Methods: This prospective study included 30 patients who underwent elective coronary artery bypass surgery at the Medipol Mega University Hospital. The ITA was harvested by monopolar electrocautery after a median sternotomy. The output of cautery was adjusted at 20 W in group A and 40 W in group B. Three to 4 cm of a distal ITA sample from each patient was examined under a light microscope by two independent pathologists. Results: The ITA harvest time was longer in group A (21.2 +/- 7.5 vs 10.3 +/- 8.1 min, p < 0.001) than in group B. ITA free flow was similar in the two groups (43.6 +/- 48.7 vs 51.7 +/- 45.0 ml/min, p = 0.762). Mild to moderate injury in the endothelial and sub-endothelial sample was more frequent in the low-cautery group (p = 0.0037). Conclusion: ITA endothelial integrity was found to be better preserved with 40W electrocautery. Moreover, 20W of monop-olar electrocautery may not be safe in pedicular ITA harvesting.
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    Increased CRP/albumin ratio is associated with superficial venous reflux disease and varicose vein formation
    (Czech Soc Cardiology & Czech Soc Cardiovascular Surgery, 2021) Unal, Orcun; Oztas, Didem Melis; Beyaz, Metin Onur; Erdinc, Ibrahim; Meric, Mert; Ulukan, Mustafa Ozer; Karakaya, Atalay
    Background: It has been recently postulated that inflammation may have an effect on varicose vein development and prognosis, besides increased venous pressure. CRP/albumin (CAR) is a novel inflammatory marker associated with poor prognosis in a various group of patients. Our aim in this study was to investigate the relation between varicose greater saphenous vein (VSM) diameter and CAR. Methods: A total of 150 patients with patients VSM insufficiency (Group 1, n: 114) and normal VSM (n: 36) were included in the study. The diameter of the VSM was measured with B-mode ultrasound, and reflux was quantified based on valve closure time using Doppler spectral tracings. Blood samples were taken during recruitment. The CAR value is determined by dividing the serum CRP level to the albumin level. Results: There were 21 (18.4%) males and 93 (81.5%) females in Group 1 and 7 males and 29 females in Group 2. Mean age of the patients were similar in both groups (48.02 +/- 12.20 years in Group 1 vs. 44.9 +/- 8.92 years in Group 2, p = 0.44). Mean BMI of the patients did not differ significantly (Group 1: 26.4 +/- 3.7 kg/m2 vs. Group 2: 25.7 +/- 4.2 kg/m2, p = 0.13). The mean diameter of VSM was measured 5.70 +/- 0.29 mm in Group 1 whereas 3.21 +/- 0.34 mm in Group 2 (p = 0.0023). Mean CRP and albumin values in Group 1 were 6.18 +/- 4.99 mg/L and 4.45 +/- 0.27 g/dL whereas 4.25 +/- 2.46 mg/L and 6.18 +/- 1.14 g/dL in Group 2, respectively (p value for CRP = 0.049, p value for albumin = 0.074). CRP/albumin was 1.28 +/- 1.34 in Group 1 and 1.11 +/- 1.21 in Group 2, which was not statistically significant (p = 0.58). There was a positive moderately strong correlation between VSM diameter and CRP/albumin ratio as well as superficial venous reflux disease (r: 0.48). Conclusion: CRP/albumin ratio is associated with increased incidence of varicose veins and increased diame-ter of greater saphenous vein; hence, superficial venous reflux disease. The findings support the hypothesis that systemic inflammation may play a role in varicose vein disease.
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    Preliminary Results of a New Illuminated Radiofrequency Ablation Catheter for the Treatment of Great Saphenous Vein Reflux Disease
    (Sage Publications Inc, 2022) Beyaz, Metin Onur; Oztas, Didem Melis; Ulukan, Mustafa Ozer; Arslan, Hasan Murat; Unal, Orcun; Ugurlucan, Murat
    Introduction: In the current study, we present single surgeon experience of a new radiofrequency ablation system, the catheter, and the device. Patients and Methods: The new system, which comprises a generator and an intervally illuminated radiofrequency ablation catheter, was used for the treatment of 272 consecutive patients with chronic venous insufficiency of the great saphenous vein between November 2017 and October 2018. Mean age of the patients was 53.40 +/- 11.91 years. Mean saphenous vein diameter was 8.51 +/- 2.45 mm. Bilateral great saphenous vein reflux disease was present in 19% (51 cases) of the patients. At the end of the procedure, the closure of the great saphenous vein was confirmed with Doppler ultrasonography. Results: Procedures could be successfully performed in all, except 1 obese (BMI> 30 kg/m(2)) male patient. At the 3rd month, outpatient clinic follow-up control Doppler USG revealed successful ablation of the treated great saphenous vein in 260 patients (96%), whereas in 12 cases (4%), there was continuing reflux. The diameters of the saphenous veins in these patients ranged between 6.9 mm and 19.5 (mean: 10.68 +/- 3.41) mm. Ten patients could be treated successfully with ablation with the same device controlled both at the interventional section as well as on the 3rd month outpatient clinic follow-up. The remaining patients underwent high ligation of the great saphenous vein. Paresthesia occurred in 1 patient and had been permanent. Hematoma occurred in a male patient and resolved spontaneously. Conclusion: Preliminary results of our new radiofrequency ablation device with illumination guidance for the treatment of great saphenous vein reflux disease indicated successful results with enhanced physician utilization, comfort, and reliability.