Are the Chicago 3.0 manometric diagnostics consistent with Chicago 4.0?

There is little information on the degree of concordance between the results obtained using the Chicago 3.0 (CCv3.0) and Chicago 4.0 (CCv4.0) protocols to interpret high-resolution manometry (HRM) seeking to determine the value provided by the new swallowing maneuvers included in the last protocol. This is a study of diagnostic tests, evaluating concordance by consistency between the results obtained by the CCv3.0 and CCv4.0 protocols, in patients undergoing HRM. Concordance was assessed with the kappa test. Bland-Altman scatter plots, and Lin's correlation-concordance coefficient (CCC) were used to assess the agreement between IRP measured with swallows in the supine and seated position or with solid swallows. One hundred thirty-two patients were included (65% women, age 53 ± 17 years). The most frequent HRM indication was dysphagia (46.1%). Type I was the most common type of gastroesophageal junction. The most frequent CCv4.0 diagnoses were normal esophageal motility (68.9%), achalasia (15.5%), and ineffective esophageal motility (IEM; 5.3%). The agreement between the results was substantial (Kappa 0.77 ± 0.05), with a total agreement of 87.9%. Diagnostic reclassification occurred in 12.1%, from IEM in CCv3.0 to normal esophageal motility in CCv4.0. Similarly, there was a high level of agreement between the IRP measured in the supine compared to the seated position (CCC0.92) and with solid swallows (CCC0.96). In conclusion, the CCv4.0 protocol presents a high concordance compared to CCv3.0. In the majority of manometric diagnoses there is no reclassification of patients with provocation tests. However, the more restrictive criteria of CCv4.0 achieve a better reclassification of patients with IEM.

Clinical outcomes and manometry results of peroral endoscopic myotomy in patients with achalasia: experience in a Latin American referral centre. / Resultados clínicos y manométricos de la miotomía endoscópica peroral en pacientes con acalasia: experiencia en un centro de referencia latinoamericano.

INTRODUCTION: Currently there is little information in Latin America on the clinical outcome and manometric evolution of patients with Achalasia undergoing peroral endoscopic myotomy (POEM). PRIMARY OUTCOME: Evaluate the manometric and clinical changes in adult patients with achalasia after peroral endoscopic myotomy at a referral center in Bogotá, Colombia. METHODS: Observational, analytical, longitudinal study. Adult patients with achalasia according to the Chicago 4.0 criteria were included. Sociodemographic, clinical and manometric variables were described. To compare the pre- and post-surgical variables, the Student's or Wilcoxon's t test was used for the quantitative variables according to their normality, and McNemar's chi-square for the qualitative variables. RESULTS: 29 patients were included, 55.17% (n=16) women, with a mean age at the time of surgery of 48.2 years (±11.33). The mean post-procedure evaluation time was 1.88±0.81 years. After the procedure, there was a significant decrease in the proportion of patients with weight loss (37.93% vs 21.43% p 0.0063), chest pain (48.28% vs 21.43, p 0.0225) and the median Eckardt score (8 (IQR 8 -9) vs 2(IQR 1-2), p <0.0001). In addition, in fourteen patients with post-surgical manometry, significant differences were found between IRP values (23.05±14.83mmHg vs 7.69±6.06mmHg, p 0.026) and in the mean lower esophageal sphincter tone (9.63±7.2mmHg vs 28.8±18.60mmHg, p 0.0238). CONCLUSION: Peroral endoscopic myotomy has a positive impact on the improvement of symptoms and of some manometric variables (IRP and LES tone) in patients with achalasia.

[Impact of biofeedback therapy on patients with fecal incontinence or constipation in a gastrointestinal neurophysiology unit in Bogotá, D.C.] / Impacto de la terapia de biorretroalimentación en pacientes con incontinencia fecal o constipación en una unidad de neurofisiología gastrointestinal en Bogotá, D.C.

INTRODUCTION: Treatment of functional disorders of the anorectal unit should focus on the underlying cause. Biofeedback therapy is a functional retraining of the pelvic floor that has proven useful in the treatment of constipation associated with dyssynergia and in the management of fecal incontinence. This study describes the first experiences with this form of biofeedback therapy in Colombia. OBJECTIVE: Describe our experience with biofeedback therapy in the gastrointestinal neurophysiology unit. MATERIALS AND METHODS: This historical cohort included patients with an indication for biofeedback therapy for constipation or fecal incontinence in the gastrointestinal neurophysiology unit during the data collection period. The response to therapy is described by comparing manometricfindings before and after 10 biofeedback sessions. RESULTS: 21 patients were included(71.4% women, the average age was 68, 9 with constipation and 12 with fecal incontinence.Among the patients with constipation there was a significant improvement in 71.4% of those who had rectal hyposensitivity and in 57.1% of those with dyssynergia. Biofeedback therapysignificantly increased the balloon expulsion rate (11.1 vs. 66.7%, p=0.02). In patients with fecal incontinence, there was improvement in 50% of those who had anal hypotonia and in 80% of those who had anal hyposensitivity. CONCLUSIONS: This study demonstrates that biofeedback therapy has a favorable impact on a high number of patients with constipationand fecal incontinence; in our center, the response is similar to that of the world literature.

The long and short of EJC-independent nonsense-mediated RNA decay.

Nonsense-mediated RNA decay (NMD) plays a dual role as an RNA surveillance mechanism against aberrant transcripts containing premature termination codons and as a gene regulatory mechanism for normal physiological transcripts. This dual function is possible because NMD recognizes its substrates based on the functional definition of a premature translation termination event. An efficient mode of NMD target recognition involves the presence of exon-junction complexes (EJCs) downstream of the terminating ribosome. A less efficient, but highly conserved, mode of NMD is triggered by long 3' untranslated regions (UTRs) that lack EJCs (termed EJC-independent NMD). While EJC-independent NMD plays an important regulatory role across organisms, our understanding of its mechanism, especially in mammalian cells, is incomplete. This review focuses on EJC-independent NMD and discusses the current state of knowledge and factors that contribute to the variability in the efficiency of this mechanism.

MIF/CXCR4 signaling axis contributes to survival, invasion, and drug resistance of metastatic neuroblastoma cells in the bone marrow microenvironment.

BACKGROUND: The bone marrow (BM) is the most common site of dissemination in patients with aggressive, metastatic neuroblastoma (NB). However, the molecular mechanisms underlying the aggressive behavior of NB cells in the BM niche are still greatly unknown. In the present study, we explored biological mechanisms that play a critical role in NB cell survival and progression in the BM and investigated potential therapeutic targets. METHODS: Patient-derived bone marrow (BM) primary cultures were generated using fresh BM aspirates obtained from NB patients. NB cell lines were cultured in the presence of BM conditioned media containing cell-secreted factors, and under low oxygen levels (1% O2) to mimic specific features of the BM microenvironment of high-risk NB patients. The BM niche was explored using cytokine profiling assays, cell migration-invasion and viability assays, flow cytometry and analysis of RNA-sequencing data. Selective pharmacological inhibition of factors identified as potential mediators of NB progression within the BM niche was performed in vitro and in vivo. RESULTS: We identified macrophage migration inhibitory factor (MIF) as a key inflammatory cytokine involved in BM infiltration. Cytokine profiling and RNA-sequencing data analysis revealed NB cells as the main source of MIF in the BM, suggesting a potential role of MIF in tumor invasion. Exposure of NB cells to BM-conditions increased NB cell-surface expression of the MIF receptor CXCR4, which was associated with increased cell viability, enhanced migration-invasion, and activation of PI3K/AKT and MAPK/ERK signaling pathways. Moreover, subcutaneous co-injection of NB and BM cells enhanced tumor engraftment in mice. MIF inhibition with 4-IPP impaired in vitro NB aggressiveness, and improved drug response while delayed NB growth, improving survival of the NB xenograft model. CONCLUSIONS: Our findings suggest that BM infiltration by NB cells may be mediated, in part, by MIF-CXCR4 signaling. We demonstrate the antitumor efficacy of MIF targeting in vitro and in vivo that could represent a novel therapeutic target for patients with disseminated high-risk NB.

Social media as source of information for Spanish-speaking patients with systemic lupus erythematosus.

INTRODUCTION: Although patients with systemic lupus erythematosus (SLE) may benefit from health-care information in social media (SoMe), they may also be prone to misleading information. An assessment of the reliability, comprehensiveness, and quality of information uploaded to SoMe for Spanish-speaking patients with SLE is lacking. METHODS: This analytical observational study evaluates the videos uploaded to YouTube® in Spanish about SLE. Information about video length, engagement (i.e., views and likes), time on the internet, popularity index, and source was retrieved, and an evaluation on reliability, comprehensiveness, and quality was performed using standardized scores. RESULTS: One hundred eighty-six videos were included in the analysis. Most videos were considered as useful (87%) or useful patient opinion (8.1%), whereas only 2.2% were considered misleading and 2.7% as misleading patient opinion. The number of views (Median 7207 vs 113,877, p = .012), popularity index (Median 13.8 vs 168.7, p < .001), number of likes (Median 155 vs 3400, p < .001), and number of dislikes (Median 3 vs 138, p = .004) were higher for misleading videos. The videos uploaded by independent users had a higher engagement than those from government or news agencies, professional organizations or academic channels. Misleading videos and those uploaded by independent users had lower rates of reliability, comprehensiveness and quality (p < .001). CONCLUSIONS: Most of the information shown in YouTube® videos on SLE tends to be useful. However, audience engagement parameters are larger for misleading videos. Exploring the qualitative features of the most popular videos is necessary to establish what features are more engaging for the audiences and to improve the content and popularity of reliable videos on chronic diseases.

Role of Monotherapy with a P2Y12 Inhibitor for Secondary Prevention in Patients with Established Atherosclerosis.

PURPOSE OF REVIEW: The role of monotherapy with a P2Y12 inhibitor for secondary prevention of cardiovascular diseases has been assessed in several randomized trials. In this article, we summarize the evidence regarding P2Y12 monotherapy for secondary prevention in each one of the major vascular territories. RECENT FINDINGS: Available data including a large recent meta-analysis show no differences in terms of all-cause death, vascular death, stroke, and a minor difference of the risk of myocardial infarction with P2Y12 monotherapy as compared to dual antiplatelet therapy. Overall, mono antiplatelet therapy with aspirin and the P2Y12 inhibitors appear similar in efficacy. However, there are clinical conditions that may suggest one drug regimen over another in secondary prevention. The risk of bleeding must always be weighed in each patient individually for the optimal choice of the antiplatelet regimen.

Current Role of Ivabradine in Stable Coronary Artery Disease Without Heart Failure.

Increase in heart rate represents a significant contribution in the pathophysiology of coronary artery disease and heart failure, by promoting atherosclerotic process and endothelial dysfunction. Thus, it negatively influences cardiovascular risk in the general population. The aim of this review is to analyze the current, controversial, and future role of ivabradine as an anti-anginal agent in the setting of coronary artery disease without heart failure. Ivabradine represents a selective heart rate-lowering agent that increased diastolic perfusion time and improving energetics in the ischemic myocardium.

Lupus enteritis as systemic lupus erythematosus main manifestation: Two case reports.

Lupus enteritis denotes inflammation of the intestinal walls resulting from the influence of systemic lupus erythematosus. It represents a rare manifestation associated with notable morbidity and mortality, marked by nonspecific gastrointestinal symptoms. In this article, we present two cases of individuals experiencing severe gastrointestinal symptoms. They had a personal or familial history of autoimmunity with intestinal involvement consistent with the presentation of lupus enteritis. Following treatment with glucocorticoids and immunomodulators, both patients exhibited a satisfactory clinical evolution. While lupus enteritis remains an uncommon occurrence, its clinical significance is undeniable. Hence, it is imperative to maintain a high level of clinical suspicion to facilitate prompt diagnosis and treatment.

Validation of the RIETE, Kuijer, and HAS-BLED Models to Assess 3-Month Bleeding Risk in Anticoagulated Patients Diagnosed with Venous Thromboembolic Disease.

OBJECTIVE: To evaluate the discriminative ability and calibration of the RIETE, Kuijer, and HAS-BLED models for predicting 3-month bleeding risk in patients anticoagulated for venous thromboembolism (VTE). METHODS: External validation study of a prediction model based on a retrospective cohort of patients with VTE seen at the Hospital Universitario San Ignacio, Bogotá (Colombia) between July 2021 and June 2023. The calibration of the scales was evaluated using the Hosmer-Lemeshow test and the ratio of observed to expected events (ROE) within each risk category. Discriminatory ability was assessed using the area under the curve (AUC) of a ROC curve. RESULTS: We analyzed 470 patients (median age 65 years, female sex 59.3%) with a diagnosis of deep vein thrombosis in most cases (57.4%), 5.7% bleeding events were observed. Regarding calibration, adequate calibration cannot be ruled out given the limited number of events. The discriminatory ability was limited with an area under the curve (AUC) of 0.48 (CI 0.37-0.59) for Kuijer Score, 0.58 (CI 0.47-0.70) for HAS-BLED and 0.64 (CI 0.51-0.76) for RIETE. CONCLUSION: The Kuijer, HAS-BLED, and RIETE models in patients with VTE generally do not adequately estimate the risk of bleeding at three months, with a low ability to discriminate high-risk patients. Cautious interpretation is recommended until further evidence is available.

Changes in glomerular filtration rate in patients with body mass index ≥35 kg/m2 treated with metabolic and bariatric surgery versus GLP-1 agonist at 1-year follow-up.

Background: Metabolic and bariatric surgery (MBS) reduces glomerular hyperfiltration. The renoprotective effects of GLP-1 analogs were derived from clinical studies in type 2 diabetes (T2D). The objective of this study was to evaluate the changes in glomerular filtration rate (GFR) over time associated with weight loss in patients with a BMI ≥ 35 kg/m2 treated with liraglutide compared with patients treated with MBS. Methods: A longitudinal study derived from a retrospective cohort of patients with BMI ≥ 35 kg/m2 treated with either MBS or liraglutide 3 mg/day, with follow-up ≥1 year. Clinical variables, baseline GFR, and 1-year GFR were analyzed. A generalized estimating equation (GEE) model was used to compare changes in GFR between both groups while controlling for confounding variables. Results: A total of 159 patients were included in the analysis. Of these, 129 patients underwent MBS (median age 60.5 years [IQR 51.8-66.6], body mass index (BMI) 40.9 kg/m2 [IQR 0.68-0.89]), and 30 patients were treated with liraglutide (median age 56 years [IQR 46-62], BMI 37.4 kg/m2 [IQR 0.69-0.93]). No difference in baseline GFR or at 12 months of follow-up was found between the two interventions. GEE analysis revealed an increase of 0.32 mL/min/1.73 m2 per month of follow-up. Factors associated with a greater increase in GFR were the percentage total weight loss (%TWL) (0.12 mL/min/1.73 m2, p = 0.023) and baseline GFR (0.69 mL/min/1.73 m2, p > 0.001) for both interventions, independent of a history of T2D. Conclusion: In patients with BMI ≥ 35 kg/m2, changes in GFR are related to %TWL and baseline GFR, regardless of the presence of diabetes or the type of intervention used.

Evaluation of information provided to patients by ChatGPT about chronic diseases in Spanish language.

Introduction: Artificial intelligence has presented exponential growth in medicine. The ChatGPT language model has been highlighted as a possible source of patient information. This study evaluates the reliability and readability of ChatGPT-generated patient information on chronic diseases in Spanish. Methods: Questions frequently asked by patients on the internet about diabetes mellitus, heart failure, rheumatoid arthritis (RA), chronic kidney disease (CKD), and systemic lupus erythematosus (SLE) were submitted to ChatGPT. Reliability was assessed by rating responses as (1) comprehensive, (2) correct but inadequate, (3) some correct and some incorrect, (4) completely incorrect, and divided between "good" (1 and 2) and "bad" (3 and 4). Readability was evaluated with the adapted Flesch and Szigriszt formulas. Results: And 71.67% of the answers were "good," with none qualified as "completely incorrect." Better reliability was observed in questions on diabetes and RA versus heart failure (p = 0.02). In readability, responses were "moderately difficult" (54.73, interquartile range (IQR) 51.59-58.58), with better results for CKD (median 56.1, IQR 53.5-59.1) and RA (56.4, IQR 53.7-60.7), than for heart failure responses (median 50.6, IQR 46.3-53.8). Conclusion: Our study suggests that the ChatGPT tool can be a reliable source of information in spanish for patients with chronic diseases with different reliability for some of them, however, it needs to improve the readability of its answers to be recommended as a useful tool for patients.

Fever of unknown origin: A 12-year case series in Colombia.

BACKGROUND: Fever of unknown origin (FUO) is a diagnostic challenge with highly heterogeneous causes. Its etiology can change according to the studied regions, and the chance of reaching a diagnosis depends on available resources. The aim of this study is to describe the clinical characteristics, etiology and the usefulness of diagnostic aids in cases of FUO managed over 12 years in a Colombian reference center. METHODOLOGY: Single-institution retrospective case series. All cases of FUO between 2006 and 2017 were identified with the help of an electronic medical record search software. Cases of adults with fever for more than three weeks who remained undiagnosed after three days of hospitalization are described. RESULTS: Of 1,009 cases evaluated, 112 cases met the inclusion criteria (median age 43 years, 66% men). The etiologies identified were infectious (31.2%), inflammatory (20.5%), neoplastic (14.3%), and miscellaneous (2.7%) diseases. 31.2% remained without etiological diagnosis. The most frequent conditions were tuberculosis (17%), Hodgkin's lymphoma (7.1%), systemic lupus erythematosus (6.3%), disseminated histoplasmosis, and adult Still's disease. Contrast tomography and biopsies were the studies that most frequently supported or confirmed the final diagnosis. CONCLUSIONS: This series of contemporary Latin American cases suggests that the categories of FUO etiologies are similar to those reported in studies from developed countries, with tuberculosis being the most frequent cause in our setting. Our results highlight the importance of tomography-guided invasive studies in the diagnostic approach to FUO.

Saving lives, saving earth: hypofractionation and carbon footprint.

PURPOSE: The healthcare system contributes approximately 5% of global greenhouse gas emissions, yet the environmental impact of radiotherapy treatments remains inadequately assessed. MATERIAL AND METHODS: We selected all breast cancer patients (1959 patients) treated with adjuvant radiotherapy between 2015 and 2023 in one institution. We analyzed the CO2 emissions associated with travel. We also selected 60 patients randomly to analyze treatment-associated carbon emissions. We compared three different fractionation schemes: normofractionation (25-30 fractions, fx), hypofractionation (15-18fx), and ultra-hypofractionation (5-6fx). RESULTS: Our study revealed a significant reduction in carbon emissions within the 5-fractions group compared to the 15-fractions group (26.69kg vs 57.13kg, p < 0.001), saving approximately the CO2 emissions associated with the electricity consumption of an average Spanish household for 12 days, or the emissions of a passenger flying from Madrid to Barcelona. CONCLUSION: Most of the carbon footprint of radiotherapy is due to travel. Hypofractionation could be an appropriate solution to protect the environment.

HbA1c overestimates the glucose management indicator: a pilot study in patients with diabetes, chronic kidney disease not on dialysis, and anemia using isCGM.

Introduction: There are multiple mechanisms by which HbA1c values can be altered in chronic kidney disease (CKD), which limits its usefulness as a strategy to assess glycemic control in this population. Methods: Concordance and agreement study between two diagnostic tests: HbA1c and glucose management indicator (GMI) measured by intermittently scanned continuous glucose monitoring (isCGM), based in a prospective cohort of patients with diabetes, CKD (glomerular filtration rate between 15 and 60 ml/min/1.73 m²), and anemia. The isCGM was performed for 3 months, and the GMI was compared with the HbA1c levels taken at the end of isCGM. Agreement was evaluated using Bland-Altman graph analysis and Lin's concordance correlation coefficient (CCC). The concordance of the measures with good glycemic control (<7%) was also evaluated. Results: A total of 74 patients were enrolled (median age 68.5 years, 51.3% female, 64.9% with CKD stage 3, hemoglobin 11.1 ± 1.2 g/l). The Bland-Altman analysis shows a mean difference between GMI and HbA1c of 0.757 ± 0.687% (95% limits of agreement: -0.590 and 2.105). Difference was greater as the values of GMI and HbA1c increased. The agreement was poor [CCC 0.477; 95% confidence interval (CI): 0.360-0.594], as well as the concordance of values with good glycemic control according to GMI versus HbA1c (67.5% versus 29.7%, p < 0.001) (Kappa 0.2430; 95% CI: 0.16-0.32). Conclusion: The HbA1c overestimates the GMI values with highly variable ranges of difference, which prevents a precise correction factor. isCGM probably is a safer option for monitoring and decision-making in this population, especially in patients treated with insulin where the risk of hypoglycemia is greater.

From Admission to Discharge-A Total Friction Burn Review from a Single Institution.

While most friction burns are adequately managed in an outpatient setting, many may require hospital admission, operative excision, and extended care. To this day, there is a wide variance in friction burn management. Our goal is to review the etiology, management, and outcomes of such burns warranting hospitalization. We conducted a retrospective review of all friction burns admitted to a single, American Burn Association-verified burn center from January 1, 2016 to December 31, 2020. A total of 28 (34%) patients required surgery for their friction burns and 15 (18%) ultimately required a split-thickness skin graft. The mean number of operations was 2.4 (95% CI 1.6-3.1). Overall, the operative group was younger (29.9 vs 38.3 years, P = .026), more likely to have a concomitant traumatic brain injury (25% vs 7%, P = .027), and had a longer hospital length of stay (17.5 vs 3.9 days, P < .001). Both groups had a similar overall TBSA (8.5% vs 10.0%, P = .35), but the operative group had a larger surface area comprised of third-degree burns (3.05% vs 0.2%, P < .001). Overall, friction burns resulting in hospital admission are associated with high-energy traumatic mechanisms and concomitant injuries. Patients who need operative intervention for their burns typically require multiple procedures often culminating in a split-thickness skin graft. While non-operative management of friction burns with topical agents has been found to be successful, patients with higher injury severity scores should be monitored very closely as they may require surgical excision.

Reirradiation salvage radiotherapy for recurrent prostate cancer after primary low-dose brachytherapy.

PURPOSE: Local recurrence of prostate cancer after low-dose rate brachytherapy is a clinical problem with limited salvage treatment options. This prospective study evaluated the tolerability and outcome of salvage external beam radiation therapy (S-EBRT) for locally recurrent prostate cancer after primary low-dose rate prostate brachytherapy (LDR-BT). MATERIALS AND METHODS: Between October 2012 and 2022, 18 patients with biopsy-proven locally recurrent prostate cancer after primary LDR-BT and received S-EBRT. We evaluated biochemical failure (BF), overall survival (OS) and acute/late gastrointestinal and urinary toxicities (CTCAE v5.0 or CTCAE v4, only before 2017). RESULTS: Median follow-up was 32 months (range, 5-124). The median age was at S-EBRT 68 years (range 59-79). 34% (6/18) were low risk, 44% (8/18) intermediate risk, 5% (1/18) high risk, and 17% (3/18) not specified. All patients were treated with IMRT/VMAT and received 60 Gy (2.5 Gy/fraction) to the prostate and 40% (7/18) 55.2 Gy (2,3 Gy/fx) to the seminal vesicles. 56% received ADT The 3-year OS and biochemical relapse-free survival after S-EBRT were 100% and 89%, respectively, with a median PSA nadir 0,035 ng/mL (0,01-0,34). Acute cystitis was present in 72% (13/18) of patients (27% of Grade > 2). Urethritis was present in 78% (14/18) patients (16% of cases Grade > 3), and acute rectitis occurred in 22% (4/18) of patients (no cases Grade > 3). CONCLUSIONS: Our data suggest that the treatment of locally recurrent prostate cancer with S-EBRT could provide adequate disease control safely and be used as an additional treatment in the natural history of prostate cancer patients. However, the results are still early and the sample is small; larger studies with longer follow-up would be mandatory.

Prolongation of the QTc Interval at Admission is Associated with Increased Mortality in Patients with SARS-COV-2 during Hospitalization. / O Prolongamento do Intervalo QTc na Admissão está Associado ao Aumento da Mortalidade em Pacientes com SARS-COV-2 durante a Hospitalização.

BACKGROUND: Cardiovascular involvement associated with SARS-COV-2 infection is related to unfavorable outcomes during hospitalization. Therefore, the measurement at the admission of the QTc interval on the 12-lead electrocardiogram may be a prognostic marker. OBJECTIVE: To identify the relationship between QTc prolongation at admission during hospitalization and mortality from SARS-COV-2. METHOD: Observational study based on a retrospective cohort of patients with confirmed SARS-COV-2 infection from San Ignacio University Hospital, Bogotá (Colombia), between March 19, 2020, and July 31, 2021. Mortality was compared in patients with prolonged and normal QTc at admission after controlling by clinical variables and comorbidities using bivariate and multivariate logistic regression models. A p-value <0.05 was considered statistically significant. RESULTS: 1296 patients were analyzed, and 127 (9.8%) had prolonged QTc. Mortality was higher in patients with prolonged QTc (39.4% vs 25.3%, p=0.001), as was hospital stay (median 11vs.8 days; p=0.002). In the multivariate analysis, mortality was associated with prolonged QTc (OR 1.61, 95% CI: 1.02; 2.54, p=0.038), age (OR 1.03, 95% CI 1.02; 1.05, p<0.001), male sex (OR 2.15, 95% CI 1.60; 2.90, p <0.001), kidney disease (OR 1.32, 95% CI 1.05; 1.66, p =0.018) and Charlson comorbidity index > 3 (OR 1.49, 95% CI 1.03; 2.17, p=0.035). CONCLUSIONS: Hospital mortality due to SARS-COV-2 is associated with prolonging the QTc interval at the time of admission, even after adjusting for age, sex, comorbidities, and basal severity of infection. Additional research is needed to establish whether these findings are related to cardiac involvement by the virus, hypoxia, and systemic inflammation.

FUNDAMENTO: O envolvimento cardiovascular associado à infecção por SARS-COV-2 está relacionado a desfechos desfavoráveis durante a internação. Portanto, a medida na admissão do intervalo QTc no eletrocardiograma de 12 derivações pode ser um marcador prognóstico. OBJETIVO: Identificar a relação entre o prolongamento do QTc na admissão durante a hospitalização e a mortalidade por SARS-COV-2. MÉTODO: Estudo observacional baseado em uma coorte retrospectiva de pacientes com infecção confirmada por SARS-COV-2 do Hospital Universitário San Ignacio, Bogotá (Colômbia), entre 19 de março de 2020 e 31 de julho de 2021. A mortalidade foi comparada em pacientes com QTc prolongado e normal na admissão e controle das variáveis clínicas e comorbidades por meio de modelos de regressão logística bivariada e multivariada. Um valor de p <0,05 foi considerado estatisticamente significativo. RESULTADOS: Foram analisados 1.296 pacientes e 127 (9,8%) apresentaram QTc prolongado. A mortalidade foi maior em pacientes com QTc prolongado (39,4% vs. 25,3%, p=0,001), assim como o tempo de internação (mediana 11 vs. 8 dias; p=0,002). Na análise multivariada, a mortalidade foi associada a QTc prolongado (OR 1,61, IC 95%: 1,02; 2,54, p=0,038), idade (OR 1,03, IC 95% 1,02; 1,05, p<0,001), sexo masculino (OR 2,15, IC 95% 1,60; 2,90, p<0,001), doença renal (OR 1,32, IC 95% 1,05; 1,66, p=0,018) e índice de comorbidade de Charlson > 3 (OR 1,49, IC 95% 1,03; 2,17, p=0,035). CONCLUSÕES: A mortalidade hospitalar por SARS-COV-2 está associada ao prolongamento do intervalo QTc no momento da admissão, mesmo após ajuste para idade, sexo, comorbidades e gravidade basal da infecção. Pesquisas adicionais são necessárias para estabelecer se esses achados estão relacionados ao envolvimento cardíaco pelo vírus, hipóxia e inflamação sistêmica.

Serial measurements of lymphocytes, D-dimer, LDH, and CRP do not improve the ability to predict COVID-19 adverse outcomes.

OBJECTIVE: We evaluated the discriminatory ability of variations in lymphocyte, D-dimer, C-reactive protein (CRP), and lactate dehydrogenase (LDH) serum levels at 48 to 72 hours of hospitalization compared with baseline measurements to predict unfavorable clinical outcomes in patients with COVID-19. METHODS: We analyzed diagnostic test results based on a retrospective cohort to determine the ability of variations (gradients or ratios) in patients' lymphocyte, D-dimer, CRP, and LDH serum levels taken 48 to 72 hours after hospital admission to predict adverse outcomes such as death, mechanical ventilation, or intensive care unit (ICU) admission developing. RESULTS: Among 810 patients (56.1% men, age 61.6 ± 16.2 years), 37.5% had at least one adverse outcome; 28.2% required ICU admission, 26.5% required mechanical ventilation, and 19.4% died during hospitalization. In comparing baseline measurements with measurements at 48 to 72 hours, D-dimer, lymphocyte delta, LDH, and CRP had similar discriminatory ability (area under the receiver operating characteristic curve [AUC] 0.57 vs. 0.56, 0.53 vs. 0.57, 0.64 vs. 0.66, and 0.62 vs. 0.65, respectively). CONCLUSIONS: Measuring serum risk markers upon hospital admission can be used to evaluate risk of adverse outcomes in hospitalized patients with COVID-19. Repeating these measurements at 48 to 72 hours does not improve discriminatory ability.