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The actual risk of thrombotic events after Covid-19 vaccination is unknown.To evaluate the risk of thrombotic events after Covid-19 vaccination.Retrospective cohort study which included consecutive adult patients vaccinated with the first dose of Covid-19 vaccine between January 1 and May 30, 2021, and a historic control group, defined as consecutive patients vaccinated with influenza vaccine between March 1 and July 30, 2019.Hospital Italiano de Buenos Aires, a tertiary hospital in Argentina.Non-Hospitalized Adults vaccinated with the first dose of a Covid-19 vaccine.Vaccination with Covid-19 vaccines available during the study period: Gam-COVID-Vac (Sputnik), ChAdOx1 nCoV-19 (AstraZeneca/Oxford or Covishield), BBIBP-CorV (Beijing Institute of Biological Products) (Sinopharm). Active comparator group exposure was Influenza vaccine.Primary endpoint was cumulative incidence of any symptomatic thrombotic event at 30 days, defined as the occurrence of at least one of the following: symptomatic acute deep venous thrombosis (DVT); symptomatic acute pulmonary embolism (PE); acute ischemic stroke (AIS); acute coronary syndrome (ACS) or arterial thrombosis.From a total of 29,985 adult patients who received at least a first dose of Covid-19 vaccine during study period and 24,777 who received Influenza vaccine in 2019, we excluded those who were vaccinated during hospitalization. We finally included 29,918 and 24,753 patients respectively. Median age was 73 years old (IQR 75-81) and 67% were females in both groups. Thirty six subjects in the Covid-19 vaccination group (36/29,918) and 15 patients in the Influenza vaccination group (15/24,753) presented at least one thrombotic event. The cumulative incidence of any thrombotic event at 30 days was 12 per 10,000 (95%CI 9-17) for Covid-19 group and 6 per 10,000 (95%CI 4-10) for Influenza group (p-value=0.022).This study shows a significant increase in thrombotic events in subjects vaccinated with Covid-19 vaccines in comparison to a control group. The clinical implication of these findings should be interpreted with caution, in light of the high effectiveness of vaccination and the inherent risk of thrombosis from Covid-19 infection itself.

Background Since the beginning of the severe acute respiratory syndrome coronavirus 2 (SARS-CoV2) pandemic, there have been many reports of increased incidence of venous thromboembolism and arterial events as a complication. Objective To determine the incidence of symptomatic thrombotic events (TEs) in patients hospitalized for SARS-CoV2 disease (coronavirus 19 [Covid-19]). Methods A retrospective single-center cohort study with adult patients with a positive reverse transcriptase-polymerase chain reaction (rt-PCR) for SARS-CoV2, included from the date of diagnosis of Covid-19 and followed for 90 days or until death. Results A total of 1621 patients were included in this study. The median age was 73 years (interquartile range25th-75th [IQR] 53-87 years) and 57% (913) were female. Overall mortality was 21.6% (348). The overall incidence of symptomatic TEs within 90 days of diagnosis was 1.8% (30 of 1621) occurring in 28 patients, including an incidence of pulmonary embolism of 0.9% (15, 95% confidence interval [CI] 0.60%-1.6%), deep venous thrombosis of 0.61% (10, 95% CI 0.2%-1%), ischemic stroke of 0.25% (4, 95% CI 0.09%-0.65%), and ischemic arterial events of 0.06% (1, 95% CI 0.008%-0.43%). No acute coronary syndrome events were recorded. The incidence of symptomatic TEs was significantly lower in the general ward than in intensive care units (1.2% vs 5.7%; p Conclusion The overall incidence of symptomatic TEs among these patients was lower than the incidence previously reported.

Objective Mounting evidence suggests that antipsychotics may have immunomodulatory effects, but their impact on disseminated infections remains unknown. This study thus sought to estimate the effect of antipsychotic treatment on the occurrence of bloodstream infection during long-term follow-up in adult patients with chronic obstructive pulmonary disease. Methods This retrospective cohort study, with new user and active comparator design, included adult patients seen from January 2008 to June 2018 in a tertiary teaching hospital in Buenos Aires, Argentina. New users of antipsychotic drugs were compared to new users of any benzodiazepine. The primary outcome of interest was incident bloodstream infection at 1 year of follow-up. Propensity score methods and a Cox proportional hazards model were used to adjust for baseline confounding. Results A total of 923 patients were included in the present analysis. Mean (SD) age was 75.0 (9.8) years, and 51.9% of patients were female. The cumulative incidence of bloodstream infections at 1 year was 6.0% and 2.3% in the antipsychotic and benzodiazepine groups, respectively. Antipsychotic use was associated with a higher risk of bloodstream infections during the first year of follow-up (hazard ratio [HR] = 2.41; 95% CI, 1.13 to 5.14) compared to benzodiazepine use. Antipsychotics with high dopamine receptor affinity presented greater risk than less selective agents (HR = 5.20; 95% CI, 1.53 to 17.67). Conclusions Antipsychotic use is associated with bloodstream infections during the first year of follow-up in adult patients with chronic obstructive pulmonary disease. Further studies are warranted to confirm our findings and evaluate this effect in a broader population of patients.

Proton pump inhibitors (PPI)-related hypomagnesemia is a potentially life-threatening adverse event first described in 2006. PPIs are widely used in the general population. Information regarding prevalence and risk factors is scarce. We conducted a cross-sectional study in inpatients to evaluate prevalence and associated factors with hypomagnesemia in chronic PPIs users. This is a cross-sectional study of hospitalized adult patients with chronic use of PPIs from January 01, 2012, to December 31, 2018. Chronic use was defined as taking PPIs at least 6 months before hospital admittance. Data were collected from informatized medical records from a University Hospital (Hospital Italiano de Buenos Aires). Hypomagnesemia was defined as a value equal to or less than 1.7 mg/dl. The first hospitalization measurement was retrieved. Thirty-six percent of patients (95% CI 30-43) with chronic PPI use presented hypomagnesemia at admission. Patients with hypomagnesemia presented a higher prevalence of chronic kidney disease (18.6% vs 8%, p 0.05), more use of oral magnesium supplementation (20.9% vs 8%, p 0.05), use of corticosteroids (32.6% vs 19.3%, p = 0.06) and calcineurin inhibitors (17.4% vs 6.7%, p 0.05). Regarding laboratory findings, they presented lower hematocrit (28.7% vs 32.8%, p 0.05), phosphatemia (3 mg/dl vs 3.4 mg/dl, p 0.05), natremia (135 mg/dl vs 136 mg/dl, p 0.05) and albumin levels (2.8 g/dl vs 3.2 g/dl p 0.05) when compared to those who presented normomagnesemia. Hypocalcemia was more frequent among patients with hypomagnesemia (57% vs 38.7%, p 0.05). In the multivariate analysis, hyponatremia, decreasing levels of hematocrit (odds ratio, OR 0.93-CI 95% 0.88-0.98) and malignant bone compromise (OR 2.83-CI 95% 1.04-7.7) were associated with hypomagnesemia. Adult patients with long-term use of PPIs have a high prevalence of hypomagnesemia. Increasing age, female sex, concomitant use of drugs that impair tubular function and chronic kidney disease may enhance this phenomenon. Anemia, hyponatremia and malignant bone compromise were associated factors with PPIs-related hypomagnesemia.

Objective To report our clinical experience with bevacizumab in a cohort of Hereditary Hemorrhagic Telangiectasia (HHT) patients with severe hepatic involvement and/or refractory anemia. Methods Observational, ambispective study of the Institutional Registry of HHT at Hospital Italiano de Buenos Aires. Patients were treated with bevacizumab due to iron deficiency refractory anemia secondary to nasal/gastrointestinal bleeding and/or high output cardiac failure. We describe basal clinical data, bevacizumab schedules, efficacy outcomes and adverse events. Wilcoxon signed ranks test and longitudinal analysis were conducted. Results Twenty adult patients were included from July 2013 to June 2019. Clinical indications were: 13 for anemia, 4 for heart failure and 3 for both. In the anemia group, median pretreatment hemoglobin was 8.1 g/dl [IQR: 7.2–8.4] and median transfusion requirement was 4 units [2–6]. In heart failure group, pretreatment median cardiac index was 4.5 L/min/m2 [4.1–5.6] and cardiac output was 8.3 L/min [7.5–9.2]. Bevacizumab 5 mg/kg/dose every 2 weeks for 6 applications was scheduled. By the end of induction, median hemoglobin at 3 months was 10.9 g/dl [9.5–12.8] (p = 0.01) and median transfusion requirement 0 units [0–1] (p

We aimed to compare the mortality risk between patients with affective disorders and dementia under treatment with antipsychotics. To do this, a matched-cohort study based on an electronic database of a tertiary teaching hospital in Argentina was performed. Antipsychotic exposure was defined as any antipsychotic drug initiated by the patient. Primary outcome was defined as all-cause mortality during the 5-year follow-up period. To estimate the association between baseline diagnosis (affective disorders vs. dementia) and all-cause mortality, we used a multivariate generalized linear model with robust standard errors. Of 1008 eligible patients, 114 age-matched pairs were included in the present study. The primary event occurred in 23 patients (20%) and 17 patients (15%) in the dementia and affective disorder group respectively. In the adjusted model, the risk of all cause mortality for the affective disorders group was 0.92 times the risk for the dementia group (95%CI, 0.54–1.59, p = 0.77). In conclusion, older patients with affective disorders starting antipsychotic treatment presented with a similar risk of all-cause mortality during the 5-year follow-up when compared to older patients with dementia who were also initiating either typical or atypical antipsychotic medications. Closer medical attention to older patients with mental conditions under antipsychotic treatment remains warranted. Fil: Szmulewicz, Alejandro G.. Fundación Favaloro; Argentina. Universidad de Buenos Aires; Argentina. Gobierno de la Ciudad de Buenos Aires. Hospital de Emergencias Psiquiáicas "Torcuato de Alvear"; Argentina Fil: Ferraris, Augusto. Universidad de Buenos Aires; Argentina. Hospital Italiano; Argentina Fil: Rodriguez, Agustín. Universidad de Buenos Aires; Argentina Fil: Campos Cervera, Lucía. Universidad de Buenos Aires; Argentina Fil: Lopez Gonzalez, Macarena. Universidad de Buenos Aires; Argentina Fil: Man, Federico. Universidad de Buenos Aires; Argentina Fil: Angriman, Federico. Hospital Italiano; Argentina. Universidad de Buenos Aires; Argentina Fil: Martino, Diego Javier. Universidad Favaloro; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Houssay; Argentina

Background Venous thromboembolism (VTE) represents a major cause of morbidity and mortality worldwide. Antipsychotic treatment is associated with an increased risk of thromboembolic disease, an effect that seems to be constant across the spectrum of distinct agents. This study sought to delineate the effect of new antipsychotic use on the risk of recurrent thromboembolic events after a first episode of either deep venous thrombosis or pulmonary embolism. Methods This cohort study, conducted between January 2010 and June 2017, was based on a prospectively collected database of adult patients with VTE. The main exposure was the new onset of antipsychotic treatment after having a first episode of venous thromboembolic disease. The primary outcome was defined as recurrent VTE, either deep venous thrombosis or pulmonary embolism, during long-term follow-up. The composite of all-cause mortality and recurrent VTE served as the secondary outcome. An inverse probability weighted multivariable Cox proportional hazards model was fitted to adjust for measured confounding and competing risks. Results One thousand one hundred three patients were included in the present analysis, of whom 136 were identified as new users of antipsychotic agents. A total of 67% of patients were currently treated with full-dose anticoagulation at baseline. No association was found between the new use of antipsychotic agents and recurrent VTE during follow-up (adjusted hazard ratio (HR) = 1.08; 95% CI, 0.38-3.08). However, the use of these agents was associated with a 63% increased risk of recurrent VTE or all-cause mortality (adjusted HR = 1.63; 95% CI, 1.26-2.10). Conclusions The use of antipsychotic agents among patients with a first episode of VTE and full-dose anticoagulation was not associated with an increased risk of recurrent thromboembolic events. However, antipsychotic treatment was associated with a higher risk of both VTE and all-cause mortality. Further studies are warranted to confirm these findings.

The emergence of colistin resistant carbapenemase-producing Klebsiella represents a therapeutic challenge and a worldwide problem.To estimate the in-hospital mortality and identify the associated risk factors among patients with colistin-resistant carbapenemase-producing Klebsiella pneumoniae (KPC) that present with a clinical infection.We carried a retrospective cohort study, including adult patients infected with colistin-resistant KPC hospitalized at a tertiary teaching hospital in Buenos Aires, Argentina during the year 2016. The main outcome was in-hospital mortality. We used generalized lineal models to evaluate potential predictors of mortality.18 patients that developed a colistin-resistant KPC clinical infection were identified and included in the final analysis. In-hospital mortality in this cohort was 38.9%. The presence of bacteremia, acute renal injury at the time of diagnosis and septic shock were associated with the main outcome.Infections due to colistin-resistant KPC among in-hospital patients was frequent and was associated with high mortality rate. In our cohort, both shock and acute kidney injury were associated with a higher likelihood of poor outcomes. Further studies are warranted to evaluate the role of these and others risk factors so as to aid in the early detection of high risk patients.