Prevalence of hepatitis C virus infection according to the year of birth: identification of risk groups.

Hepatitis C virus (HCV) screening according to the year of birth is recommended is some countries based on epidemiological data. The aim of this study was to analyze anti-HCV prevalence among people born between 1905 and 2015 in Argentina. Patients attending a tertiary care hospital in Buenos Aires, Argentina, from 2001 to 2015, who had a determination of anti-HCV, were included. Of 22,079 patients analyzed, 1,152 (5.2%; 95% confidence interval [CI]: 4.9%-5.5%) patients showed positive anti-HCV and 729 (3.3%; 95% CI: 3.1%-3.5%) patients showed detectable viremia. Three risk groups were identified (HCV prevalence): low-risk group-outpatient clinics/emergencies (2.8%); intermediate-risk group-in-patients (8%); and high-risk group-dialysis/transplants (27.2%). In the low-risk group, being born in 1973 or before was identified as a cut-off value for the risk of anti-HCV acquisition (area under the receiver-operator characteristic curve: 75.1 [95% asymptotic CI: 0.732-0.770; p < 0.001]). Ninety-one patients born after 1973 (0.8%) showed positive anti-HCV versus 457 individuals born in 1973 or before (5.8%), p < 0.001. In this group, positive anti-HCV was observed in 252 females (2.1%) and 296 males (4.1%), p < 0.001. In a multivariate analysis adjusted for gender, alanine-aminotransferase levels and HIV coinfection, being born in 1973 or before was independently identified as a risk for positive anti-HCV (adjusted odds ratio: 14.234 [95% CI: 9.993-20.277]; p < 0.001). People born in 1973 or before without other risk factors should be included in screening programs to link the highest possible number of HCV-infected patients to appropriate care and treatment.

Core amino acid variation at position 110 is associated with sustained virological response in Caucasian patients with chronic hepatitis C virus 1b infection.

The aim of this study was to analyze the impact of core variations on sustained virological response (SVR) to pegylated interferon plus ribavirin (PEG-IFN/RBV) and its association with predictive factors of response in Caucasian patients infected with genotype 1 hepatitis C virus (HCV-1). Full-length core sequences were analyzed in 100 Caucasian HCV-1-infected patients who received therapy with PEG-IFN/RBV. The associations between variations in the core protein and SVR, as well as with predictors of SVR, were analyzed. Variations at core 62, 70 and 110 were selected as candidates. There were almost no variations at these positions among patients harboring HCV-1a. However, they were identified in 10 (30.3 %), 21 (63.6 %) and 13 (39.4 %) subjects with HCV-1b, respectively. Among the HCV-1b patients, 39.1 % individuals carrying core R62 and 70 % subjects with core R62G showed SVR (p = 0.141), and 66.7 % of HCV-1b patients harboring core R70 and 38.1 % with core R70Q achieved SVR (p = 0.157), whereas the rate of SVR was 70 % for individuals with core T110 and 15.4 % for those with core T110N (p = 0.004). No statistical interaction between core variations and IL28B genotype was observed. Patients with R70 showed higher median (interquartile range) baseline plasma levels of low-density-lipoprotein cholesterol (LDL-C) than those with R70Q (96 [86-118] mg/dL vs. 76 [54-88] mg/dL, p = 0.014). We concluded that a substitution at core 110 is associated with a lower rate of SVR in Caucasian HCV-1b-infected patients receiving PEG-IFN/RBV. Furthermore, the variation at the core 70 position is related to plasma levels of LDL-C in these patients.

Effects of the genetic pattern defined by low-density lipoprotein receptor and IL28B genotypes on the outcome of hepatitis C virus infection.

The aim of this study was to assess the impact of the genetic pattern (GP) defined by the single nucleotide polymorphisms (SNPs) rs14158 of low-density lipoprotein receptor (LDLR) and rs12979860 of interleukin-28B (IL28B) genes on the outcome and features of hepatitis C virus (HCV) infection in patients with and without human immunodeficiency virus (HIV) coinfection. 314 HIV/HCV-coinfected and 109 HCV-monoinfected patients treated with pegylated interferon (Peg-IFN) plus ribavirin (RBV), as well as 51 patients with HCV spontaneous clearance (SC), were included. Variations in both SNPs were determined by the TaqMan polymerase chain reaction (PCR) assay. In the 286 patients chronically infected by HCV genotypes 1 or 4, both rs14158 CC and rs12979860 CC were associated with a higher rate of sustained virological response (SVR), and these effects were complementary in both HCV-monoinfected and HIV/HCV-coinfected patients. Thus, 24 % of patients with rs14158/rs12979860 TT-TC/TT-TC, 33 % with TT-TC/CC, 44.2 % with CC/TT-TC, and 75.8 % harboring CC/CC attained SVR (p < 0.001). SC was associated with the IL28B genotype (66.7 % CC in SC vs. 42.6 % among those with chronic infection, p < 0.001) but not with the LDLR genotype. There was no association between GP and the plasma level of alanine aminotransferase (ALT) or the presence of advanced fibrosis. There is a complementary effect between the IL28B and LDLR genotypes on the probability of achieving SVR after Peg-IFN/RBV therapy in patients with HCV 1 or 4. Thus, the predictive value of IL28B genotype is modulated by the LDLR genotype in both HCV-monoinfected and HIV/HCV-coinfected patients. This complementary effect of both genotypes is also observed on the plasma levels of low-density lipoprotein cholesterol (LDL-C).

Lack of short-term increase in serum mediators of fibrogenesis and in non-invasive markers of liver fibrosis in HIV/hepatitis C virus-coinfected patients starting maraviroc-based antiretroviral therapy.

The aim of this study was to analyze serum changes in mediators of fibrogenesis and in non-invasive markers of liver fibrosis among HIV/HCV-coinfected patients starting maraviroc (MVC)-based antiretroviral therapy. Patients included in this prospective pilot study met the following criteria: (1) HIV-infection, (2) detectable serum HCV-RNA, and ((3) started MVC. Transforming growth factor-ß1 (TGF-beta1), matrix metalloproteinase-2 (MMP-2) and tissue inhibitor of matrix metalloproteinase-1 (TIMP-1) were measured in serum samples at baseline and 6 months after starting MVC. AST-to-platelet ratio index (APRI) was assessed at the same time points. Twenty-four patients were analyzed. Median (IQR) serum levels at baseline and after 6 months on MVC of TGF-beta1 were 27,295 (20,562-36,844) and 33,753 (18,973-46,130) pg/mL (p=0.116), of MMP-2 were 216 (186-274) and 241 (194-306) ng/mL (p=0.247), and of TIMP-1 were 237 (170-284) and 216 (171-271) ng/mL (p=0.415). APRI levels were 0.99 (0.53-3.46) at baseline and 0.83 (0.48-2.34) at 6 months (p=0.16). Serum mediators of liver fibrogenesis and fibrosis do not change significantly in HIV/HCV-coinfected patients in the short-term after starting MVC. As TGF-beta1 levels have been shown to increase over time in HCV infection and liver fibrosis worsens rapidly in HIV/HCV coinfection, these parameters seem to evolve in a different way in MVC-treated patients.

Tricuspid valve replacement for Ebstein's anomaly in childhood with a Starr-Edwards caged-ball prosthesis. 21-year follow-up.

A 21-year follow-up after tricuspid valve replacement (TVR) with a Starr-Edwards caged-ball prosthesis in a ten-year old boy is described. TVR is performed for Ebstein's anomaly, with strict indications in childhood. Despite the current preference for bioprostheses, good performance can be expected from the Starr-Edwards caged-ball valve.

Strut failure of the Starr-Edwards cloth-covered metallic ball prosthesis. Report of two asymptomatic cases and review of the overall experience.

Two cases of asymptomatic strut failure of an aortic Starr-Edwards cloth-covered metallic ball prosthesis are reported. Strut failure can be asymptomatic for years. Available information on the overall worldwide experience of six cases is reviewed and suggestions made for early diagnosis and treatment of this rare complication.

Sutureless fixation of long aortocoronary saphenous vein grafts with oxidized regenerated cellulose.

A technique of sutureless epicardial fixation of long aortocoronary saphenous vein grafts using oxidized regenerated cellulose is illustrated. Sutureless fixation has been previously performed with fibrin glue. Possible advantages of using oxidized regenerated cellulose instead of fibrin glue are discussed.

Life-threatening chylothorax after left internal mammary artery dissection: therapeutic considerations.

Persistent chylothorax developed in a 53-year-old man after left internal mammary artery (LIMA) takedown and required surgical intervention. After an unsuccessful supraclavicular approach, left-sided standard thoracotomy showed thick adhesions around the LIMA takeoff with a diffuse oozing rather than an identifiable discrete leak. A possible leaking point was stitched, the area was sealed with fibrin adhesive, and complete remission ensued. Operation for chylothorax after LIMA takedown is challenging. A left-sided standard thoracotomy with minimal dissection and use of fibrin adhesive rather than blind stitching are recommended.

Results of intraaortic balloon pumping after cardiac surgery: experience with the Percor balloon catheter.

One hundred thirty-eight patients undergoing an open-heart procedure required an intraaortic balloon pump (IAPB) postoperatively. In Group I (N = 45), the AVCO femoral conduit surgical technique was used; in Group II (N = 93), the Percor balloon was inserted either in the operating room after groin cutdown (open insertion) or percutaneously in the intensive care unit (percutaneous insertion). IABP usage increased in Group II (3% versus 1.6%; p less than 0.001). Immediate mortality was 40% (55/138). Use of the Percor balloon in Group II resulted in lower immediate mortality (32/93 or 34% versus 23/45 or 51%; p less than 0.06). Delayed mortality from multiorgan failure was 11.6% (16/138). Immediate percutaneous insertion at the bedside rather than a return to the operating room for open insertion yielded lower mortality (2/8 or 25% versus 6/7 or 86%; p less than 0.05). Open insertion of the Percor balloon decreases the failure rate of insertion compared with both the AVCO femoral conduit technique (7/85 or 8.2% versus 5/45 or 11%) and percutaneous insertion. It has more complications than the AVCO femoral conduit technique (7/85 or 8.2% versus 2/45 or 4.4%) and less than percutaneous insertion.

Improved early results after aortic valve replacement: analysis by surgical time frame.

Primary aortic valve replacement was performed in 430 patients. It was an isolated procedure in 339 and was combined with coronary artery bypass grafting in 91. Of these patients, 282 underwent operation from 1970 through 1976 (time frame 1) and 148 from 1980 through 1985 (time frame 2). They were divided into subgroups by age, New York Heart Association functional class, combined coronary artery bypass graft, and valvular lesion. Overall hospital mortality was 7.7% (time frame 1 = 10.6% versus time frame 2 = 2.0%; p less than 0.01). Overall, functional class III or IV was the strongest predictor of hospital mortality (p less than 0.001). Association of coronary artery bypass graft was the next strongest predictor of hospital mortality (p less than 0.01), and it retained its predictive value in time frame 2. Overall, hospital mortality was higher in patients older than 55 years (10.5% versus 3.5%; p less than 0.05). There were no hospital deaths in patients younger than 55 years in time frame 2. Type of valvular lesion was not a predictor of hospital mortality. Hospital mortality in patients receiving cardioplegia was 2%. Cardioplegia use has lessened the effect of age and functional class as predictors of hospital mortality after primary aortic valve replacement. Earlier operation in time frame 2 played a substantial role in the overall improvement of early results.

Surgical myocardial revascularization (CABG) in patients with pulmonary disease: beating heart versus cardiopulmonary bypass.

BACKGROUND: Adverse effects on the respiratory system can be severe in many instances after coronarv artery bypass grafting (CABG) with cardiopulmonary bypass (CPBP). Recently, operative techniques without CPBP have gained widespread consent, thanks to the newly developed retractors that allow satisfactory immobilisation of the surgical field. METHODS: Thirty-seven patients operated upon in our Institution between April 1997 and April 1998 showed an obstructive and/or restrictive pulmonary disease. Twenty-one patients were operated on without CBPB (group A), while 16 patients were operated using CPBP (group B, control). The allocation in each group had been randomised. RESULTS: The length of the operation in group A was less than in group B (196+/-35 minutes vs 235+/-60 minutes), (p=0.014). A significant difference was found in postoperative bleeding: 562+/-381 ml vs 776+/-378 (p=0.046), in postoperative red cell count, hemoglobin level and Hct. Permanence on the ventilator was 19.1+/-13 hours in group B and 13.1+/-6.1 hours in group A (p=0.03). The length of stay in ICU was significantly different: 33.8+/-16.2 hours for group A vs 53.6+/-29.3 hours for group B (p=0.01). No respiratory failure occurred in group A; two patients experienced slow weaning from ventilation assistance and one died from that complication in group B. CONCLUSIONS: Myocardial revascularization without CPBP allows a better postoperative clinical course in patients with advanced pulmonary disease.

False aneurysm from the aortic vent site.

False aneurysm from the aortic vent site is an uncommon complication following open heart surgery. An ascending aorta false aneurysm developed in a patient four months after mitral and aortic valve replacement. Extensive adhesions precluded aortic dissection and cross-clamping. Femoro-femoral cannulation, low flow, low pressure, and low temperature cardiopulmonary by-pass was used. The aneurysm was resected and then repaired with a Dacron patch. A Foley catheter was placed in the ascending aorta through the defect to obtain a bloodless field. This surgical approach can be useful in managing this difficult situation.

[Prevalence of cervical infection by human papilloma virus (HPV) in the Caucasian and Guaraní populations residing in the province of Misiones, Argentina]. / Prevalencia de la infección cervical por virus papiloma humano (HPV) en población caucásica y guaraní, residente en la provincia de Misiones, Argentina.

A genital infection with human papillomavirus (HPV) of a high risk type is necessary for the development of cervical carcinoma. HPV viral distribution among diverse world populations is not homogeneous, viral reservoirs having been detected in particular regions that can interact when humans engage in active contacts. Such viral dynamics alters the population cervical cancer relative risk, particularly when the prevalence of HPV oncogenic risk types is high. We have compared women exposed to different social, cultural and environmental conditions regarding cervical HPV infection, analyzing two populations from Misiones, Argentina: White urban women and--Guarani indian women living in the rain forest. Demographic, clinical and sexual behavior data were collected and cytological, colposcopical and virological analysis performed. Detection and genotypification of HPV was performed by PCR-RFLP. The prevalence for generic HPV infection found was high in both populations, urban women: 43%, Guarani indians: 60%, with a statistically significant difference. These values were positively associated to age of first intercourse, number of male partners and smoking history. HPV type-specific prevalences showed a relative homogeneity between populations when the main representatives of the high risk (16 and 18: 23%) and low risk (6 y 11: 12%) types were grouped together. However, the presence of other viral types was notoriously different, representing only 9% in urban women and 29% in Guarani indians with particularly high risk HPV types (33, 35, 39, 45, 51, 52, 58, 67, 68). This situation might be of importance for future viral dynamics, phylogenetic and vaccine formulation studies.