Introduction. Extracorporeal circulation (ECC) related systemic oxidative stress is a well-known entity but the underlying mechanisms are not clearly described. Our aim was to investigate the relation between the oxidative stress indices, inflammatory markers, and phosphorylcholine-coated (PCC) ECC systems. Patients and Methods. Thirty-two consecutive coronary artery bypass grafting (CABG) cases were randomly assigned to Group I (PCC, n = 18) and Group II (noncoated, n = 14) ECC circuits. Total Antioxidant Status (TAS), Total Oxidant Status (TOS), Tumor Necrosis Factor-α (TNF-α), Interleukin-1β (IL-β), Interleukin-6 (IL-6), Interleukin-8 (IL-8), Interleukin-10 (IL-10), and Procalcitonin (PCT) levels were measured at 5 different time points. The association between the oxidative indices levels and PCC system used was analyzed. Results. In Group I TOS and TAS statuses were increased at T1, T2, T3, and T4, while IL-10 and TNF-α levels accompanied those raises only at T2 (Group I-Group II, 4.73 ± 2.04 versus 2.79 ± 0.63, p = 0.002, and 30.56 ± 8.11 versus 23.97 ± 7.8, p = 0.031, resp.). In contrast, mean TAS and TOS levels were similar to baseline at all time points in Group II but IL-6 and IL-8 levels were increased at T2 (Group I-Group II, 16.84 ± 5.63 versus 44.81 ± 17.0, p = 0.001, and 38.88 ± 9.8 versus 46.14 ± 9.25, p = 0.038, resp.). Conclusion. Even coated ECC systems are still incapable of attenuating the inflammatory response to cardiopulmonary bypass (CPB).
ObjectiveCoronary artery dilations (CDs), a subgroup of coronary artery anomalies (CAAs), are relatively rare but important cardiac pathologies. They are considered to be linked to coronary atherosclerosis in most cases.MethodsThe demographic data, multi-slice computed tomographic coronary angiography data, coronary calcium score, and ascending aortic diameter (AAD) of 1538 patients were reviewed. In total, 197 (12.8%) patients (166 men, 31 women; age 15 – 84 years; mean 55.78 ± 12.32 years) with CAAs were identified, and 81 (5.3%) patients (70 men, 11 women; age 27 – 80 years; mean 56.63 ± 12.06 years) had CDs. Multiple regression and correlation analyses were performed in all 1538 patients to predict the association between the AAD and the presence of CD and thus their correlation with atherosclerosis.ResultsThe AAD was significantly larger in patients with than without CAAs and CDs. Male sex was significantly more prevalent in patients with CAAs and CDs. According to the multiple logistic regression model, male sex increased the risk of CD by 2.650 and the risk of CAA by 2.017, while hyperlipidaemia decreased the risk of CAA by 0.681. While a moderately weak correlation between the AAD and age was observed in patients with CDs, no correlation was found between the AAD and coronary calcium score.ConclusionAlthough the natural history and physiopathology of CDs is not yet fully understood, the present study shows an association between the AAD and the presence of CDs but a lack of association between atherosclerosis and CDs.
Background: Biodegradable atrioventricular annuloplasty rings are theoretically more infection resistant due to their intra-annular implantation technique and nonporous structures (monofilament of poly-1,4-dioxanone). The aim of this study was to investigate the infection resistance of a biodegradable annuloplasty ring (Kalangos-Bioring®) in a rat subcutaneous implantation model and to compare it with a commonly used conventional annuloplasty ring (Edwards Physio II®). Methods: This study included 32 Wistar albino rats which were divided into 2 groups according to the implantation of sterile or infected annuloplasty rings as control and study groups. Each animal had 2 implantation pockets (made on the right and left side of the dorsal median line) where 1 cm of the biodegradable annuloplasty ring was implanted into one pocket and 1 cm of the conventional annuloplasty ring was implanted into the other pocket. The infection model was created by topical inoculation of 1 mL Staphylococcus aureus strain (2 × 107 colony-forming units/mL) into the implantation pockets before skin closure. Each group was equally divided into 4 subgroups according to different follow-up schedules. The animals were inspected for local as well as systemic infection signs, and the rings were explanted at weeks 2, 4, 9, and 14 following implantation. Implantation pockets were evaluated macroscopically as well as by histopathological examinations. Microbiological analysis of the explanted implants with surrounding tissue was done by using quantitative sonication method. Results: Conventional ring-implanted pockets showed a more prominent inflammation reaction than the biodegradable ring-implanted pockets, and this characteristic was found to be accentuated with bacterial contamination. The sterile rings did not reveal any positive cultures in either group. The number of positive cultures found in conventional rings contaminated with S. aureus was greater than in the biodegradable ring group (11/16 vs. 2/16 positive cultures, respectively; p = 0.0032). The amounts of growing bacteria in the culture environment were also statistically significantly higher in the conventional ring group (7,175 ± 5,936 vs. 181 ± 130 colony-forming units/mL, respectively; p < 0.0005). Conclusions: This is the first experimental study confirming the theoretical advantage of the infection resistance of the biodegradable annuloplasty ring (Kalangos-Bioring®) when implanted in an active infectious environment. Large animal models mimicking clinical scenarios and clinical comparative studies are needed to verify our results.
Although transaortic septal myectomy in obstructive hypertrophic cardiomyopathy (OHC) is accepted as a safe procedure, it may end up with serious peroperative complications. We developed a practical method to avoid this unfavorable outcome by using a 20-cc syringe body. We believe this apparatus will provide safe and effective septal myectomy procedures without additional cost.
Amaç: Aortopulmoner şant operasyonları, kompleks siyanotik kalp hastalıklarında pulmoner kan akımının arttırılması ve pulmoner arterlerin gelişmesi, dolayısı ile sistemik oksijen saturasyonunun iyileştirilmesini amaçlayan palyatif prosedürlerdir. Çalışmadaki amaç, palyatif aortopulmoner şant operasyonu uygulanan hastalarda preoperatif durum, operatif teknik ve yaklaşımlar ile postoperatif seyir arasındaki ilişkileri tespit etmek, mortalite ve morbiditeye etki eden risk faktörlerini araştırmak ve değerlendirmektir. Gereç ve yöntemler: Çalışmaya Kasım 1985-Ağustos 2009 tarihleri arasında İstanbul Üniversitesi Kardiyoloji Enstitüsü Kalp Damar Cerrahisi Anabilim Dalı’nda Modifiye Blalock-Taussig şant (MBTS) operasyonu uygulanan 587 olgu dahil edildi. Retrospektif olarak preoperatif ve operatif veriler kaydedilerek, hastalar patofizyolojinin tek ya da çift ventrikül tamirine uygunluğu temel alınarak (univentrikül/biventrikül) iki grupta sınıflandırıldı. Birincil sonuç olarak hastane ölümü veya iyi hal ile taburcu olma kabul edildi. Yaş grupları (neonatal, 1 ay-1 yaş ve 1 yaş üzeri) ve cerrahi yaklaşım (torakotomi, sternotomi) temel alınarak, yaklaşımlar arasındaki farkların birincil sonuç üzerine etkisi değerlendirildi. Mortalite ve morbidite üzerine etki eden risk faktörleri istatistiksel olarak araştırıldı. Bulgular: Çalışmaya katılan 364’ü erkek (%62), 223’ü kız (%38), ortalama yaşı 21,6±31,2 ay (0-240) ve ortalama kilosu 10.7±7.2 kg (2.7-54) olan 587 hastanın, 66'sı1 aylık (%11.2), 236'sı 1 ay-1 yaş (%40.2) ve 285'i 1 yaş üzeri (%48.6) grupta değerlendirilmiştir. Yüzdoksanbir hastada univentriküler (%32.5) ve 396 hastada biventriküler (%67.5) tamir planlanmış, 141 hastada median sternotomi (%24), 446 hastada torakotomi (%76) uygulanmıştır. Erken dönem mortalite oranı %11.6’dır. Şant yetmezliği açısından; yaş, tanı, ekstrakorporeal dolaşım (ECC) kullanım ihtiyacı, cerrahi yaklaşım, şant çapı anlamlı bulunmuş ve çoklu değişken lojistik regresyon analizi sonucunda cerrahi yaklaşım bağımsız risk faktörü olarak saptanmıştır (p=0.002). Mortalite açısından anlamlı bulunan yaş, şant çapı ve cerrahi yaklaşım arasında lojistik regresyon analizi ile sternotomi (p=0.0001) ve 1 ay-1 yas arası grup (p=0,008) bağımsız risk faktörü olarak izlenmiştir. Sonuç: Halen özellikle kompleks konjenital kalp hastalıklarında palyatif cerrahinin altenatif yaklaşımlarının azlığı sebebi ile kalp cerrahisindeki yerini koruyacağı görülmektedir. Günümüzde MBTS prosedürü için cerrahi yaklaşımlar ve yoğun bakım takip protokollerinde geniş bir bilgi birikimi ve deneyim edinilmiş olsa bile, bu hasta grubunda mortalite ve morbiditeye etkili risk faktörlerini uzun dönem sonuçları ile araştıran prospektif çalışmalara ihtiyaç vardır.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
hi@scite.ai
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.