Diagnostic value and utility of commonly used biomarkers of cardiac and renal function in cardiorenal syndromes: a narrative review.

Cardiorenal syndrome (CRS), first defined in 2004 as a consequence of the interactions between the kidneys and other circulatory departments leading to acute heart failure, has since been recognized as a complex clinical entity that is hard to define, diagnose and classify. The framework for the classification of CRS according to pathophysiologic background was laid out in 2008, dividing CRS into five distinct phenotypes. However, determining the timing of individual organ injuries and making a diagnosis of either renal or cardiac failure remains an elusive task. In clinical practice, the diagnosis and phenotyping of CRS is mostly based on using laboratory biomarkers in order to directly or indirectly estimate the degree of end-organ functional decline. Therefore, a well-educated clinician should be aware of the effects that the reduction of renal and cardiac function has on the diagnostic and predictive value and properties of the most commonly used biomarkers (e.g. troponins, N-terminal pro-brain natriuretic peptide, serum creatinine etc). They should also be acquainted, on a basic level, with emerging biomarkers that are specific to either the degree of glomerular integrity (cystatin C) or tubular injury (neutrophil gelatinase-associated lipocalin). This narrative review aims to provide a scoping overview of the different roles that biomarkers play in both the diagnosis of CRS and the prognosis of the disease in patients who have been diagnosed with it, along with highlighting the most important pitfalls in their interpretation in the context of impaired renal and/or cardiac function.

Postoperative Hyperuricemia-A Risk Factor in Elective Cardiosurgical Patients.

Hyperuricemia is a well-known cardiovascular risk factor. The aim of our study was to investigate the connection between postoperative hyperuricemia and poor outcomes after elective cardiac surgery compared to patients without postoperative hyperuricemia. In this retrospective study, a total of 227 patients after elective cardiac surgery were divided into two groups: 42 patients with postoperative hyperuricemia (mean age 65.14 ± 8.9 years) and a second group of 185 patients without it (mean age 62.67 ± 7.45 years). The time spent on mechanical ventilation (hours) and in the intensive care unit (days) were taken as the primary outcome measures while the secondary measure comprised postoperative complications. The preoperative patient characteristics were similar. Most of the patients were men. The EuroSCORE value of assessing the risk was not different between the groups nor the comorbidities. Among the most common comorbidities was hypertension, seen in 66% of all patients (69% in patients with postoperative hyperuricemia and 63.7% in those without it). A group of patients with postoperative hyperuricemia had a prolonged time of treatment in the intensive care unit (p = 0.03), as well as a prolonged duration of mechanical ventilation (p < 0.01) and a significantly higher incidence of the following postoperative complications: circulatory instability and/or low cardiac output syndrome (LCOS) (χ2 = 4486, p < 0.01), renal failure and/or continuous venovenous hemodiafiltration (CVVHDF's) (χ2 = 10,241, p < 0.001), and mortality (χ2 = 5.22, p < 0.01). Compared to patients without postoperative hyperuricemia, elective cardiac patients with postoperative hyperuricemia have prolonged postoperative treatment in intensive care units, extended durations of mechanically assisted ventilation, and a higher incidence of postoperative circulatory instability, renal failure, and death.

Prediabetes, Non-Dipping Profile and Hypertension-A Recipe for Increased Arterial Stiffness.

BACKGROUND: Pulse wave velocity (PWV) is a known predictor of target organ damage, cardiovascular disease and overall mortality. The aim of this study was to compare the PWV values in subjects with prediabetes, a non-dipper profile and arterial hypertension with their values in healthy subjects. METHODS: A total of 301 subjects, aged 40-70 years, without diabetes mellitus were included in this cross-sectional study (150 with prediabetes). They underwent a 24 h ambulatory blood pressure monitoring (ABPM). Subjects were divided into three hypertension groups (A = healthy, B = controlled hypertension, C = uncontrolled hypertension). Dipping status was determined according to ABPM results, and PWV was measured by an oscillometric device. Prediabetes was defined as having 2 separate fasting plasma glucose (FPG) measurements between 5.6 and 6.9 mmol/L. RESULTS: The highest PWV values were found in group C (9.60 ± 1.34 vs. 8.46 ± 1.01 in group B vs. 7.79 ± 1.10 in group A; p < 0.001), in subjects with prediabetes (8.98 ± 1.31 m/s vs. 8.26 ± 1.22 m/s; p < 0.001) and in prediabetic non-dippers among age groups (p = 0.05). In the multivariate regression model age, blood pressure, nocturnal indices and FPG were shown as independent predictors of PWV values. CONCLUSION: Significantly higher PWV values were found in subjects with prediabetes and non-dipping profiles in all three examined hypertension groups.

EARLY TEACHING AND ADOPTION OF VIDEOLARYNGOSCOPY IN EMERGENCY MEDICINE TRAINING.

The aim of this paper is to gather and evaluate available literature about using videolaryngoscopy as a training tool for novice learners and compare it to direct laryngoscopy. Search of the available literature was performed using the MEDLINE database, through the PubMed searching tool. The inclusion criteria were that papers had to be original research and participants had to be novices in the field of airway management. The studies also had to pertain to the topic of using videolaryngoscopy as a training tool, therefore all papers that evaluated performance of videolaryngoscopy in clinical applications or did not pertain to using videolaryngoscopy as a training tool were excluded from this review. Five studies were identified that fitted the inclusion criteria, all of which showed a statistically significant difference in first attempt success at endotracheal intubation in favor of videolaryngoscopy when compared to direct laryngoscopy. One of the studies also demonstrated a faster skill acquisition rate when using videolaryngoscopy. The use of videolaryngoscopy in teaching airway management to trainees (emergency medicine residents included) is a viable option and should be encouraged and researched further.

ARTERIAL HYPERTENSION FOLLOWING COVID-19: A RETROSPECTIVE STUDY OF PATIENTS IN A CENTRAL EUROPEAN TERTIARY CARE CENTER.

The aim of this study was to determine the frequency of newly verified or worsened existing hypertension in patients who had coronavirus 2019 (COVID-19). To be categorized as a COVID-19 patient, a positive reverse-transcription polymerase chain reaction test at a single point in time was required. The patients' age, history, laboratory values and antihypertensive therapy of patients were recorded. In one year, 32 of 199 patients studied had either newly verified (15) or worsened existing (17) arterial hypertension. Among those patients, the median time from a verified infection to the onset of symptoms was 3 months. When the patients were divided into groups, 4 were in the acute, 11 in the sub-acute, 8 in the chronic and 9 in the "long COVID" group. Compared to the rest of the study population, patients presenting with arterial hypertension had significantly higher systolic (median 141 mmHg vs 130 mmHg, p<0.001) and diastolic (median 93 mmHg vs 80 mmHg, p<0.001) blood pressure and were significantly younger (median 51 vs 59 years, p 0.032). Arterial hypertension following COVID-19, either newly verified or worsened existing, is a relatively common occurrence (16% of our patient pool), indicating that more effort should be directed at evaluating the blood pressure values of patients following COVID-19.

CAN'T INTUBATE, CAN'T OXYGENATE: A RARE CASE OF A DIFFICULT AIRWAY DUE TO NONHEREDITARY ANGIOEDEMA.

Angioedema is a form of allergic mediated by histamine and non-allergic mediated by bradykinin and can be lethal if not recognized and treated promptly. This case demonstrates the proper diagnosis of and intervention in rapid onset severe angioedema. A 68-year-old male came to the emergency department with a complaint of dyspnea that started two hours before. He had type II diabetes, chronic kidney disease and several different antihypertensive medications, including an ACE inhibitor for hypertension. During physical examination, the patient was hypertensive, tachycardic, tachypnoic, and edematous. During his stay in the ED he was treated with a combination of corticosteroids, antihistamines and epinephrine, but the patient's edema and dyspnea worsened and his oxygen saturation started to deteriorate with a progression of skin edema. Intubation was not possible due to the large edema of the tongue, so a tracheotomy was done. An ampule of icatibant was administered and rapid regression of the edema, along with the stabilization of the patient's vital signs, followed after five minutes. The patient was discharged home after five days with a recommendation of discontinuing the ACE inhibitor. While non-hereditary angioedema is not a rare condition, emergency physicians should be adequately educated about it.

SYSTEMIC INFECTION WITH SINGLE OR MULTI-ORGAN DAMAGE CAUSED BY INADEQUATELY MANAGED CHRONIC WOUNDS: A CASE SERIES.

Chronic wounds are often underestimated condition with increasingly growing inpatient and outpatient treatment costs. Since the patient population affected by chronic wounds is heterogeneous and includes diabetes, chronic venous insufficiency and peripheral artery disease patients, with additional differences in gender, age, previous medical history, treatment of chronic wounds is highly personalized and dependent on a variety of factors. This paper aims to highlight the problems that the chronic wound patient population is facing during the COVID-19 pandemic: from higher probability of an undesirable disease outcome to the fact that many of them have limited access to primary care providers and to the regular and continuous care that their condition demands. This paper describe three patients with chronic wounds. Each of the patients had a significant worsening of their chronic wounds during the COVID-19 pandemic: either following an active SARS-CoV-2 infection or due to the limited access to primary care. The cases described here highlight the necessity of providing proper and regular care for all patients during the COVID-19 pandemic, regardless of the current state of the healthcare system and the adversities and hurdles it currently faces, to prevent the pandemic from becoming a syndemic.