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Platelet diseases and dysfunction are taught early in medical school to all future physicians. Understanding of the coagulation cascade and hemostatic mechanisms has allowed for targeted pharmacological therapies that have been significantly impactful in clinical practice. Platelets are an early participant in hemostasis physiologically and under pathophysiological states. A review of literature involving platelet disfunction. Various presentations of platelet diseases and dysfunction challenge clinicians and require a firm understanding of normal platelet function, drugs that mediate or modulate platelet effectiveness, and nonpharmacologic etiologies of platelet diseases and dysfunction with corresponding best practice treatment approaches. This review summarizes normal and abnormal states associated with platelets and treatment strategies.

With an increasing number of left ventricular assist devices (LVADs) being placed every year, emergency clinicians are increasingly likely to encounter them in their practice. Patients may present to the emergency department (ED) with significant hemodynamic perturbations with an LVAD and it is imperative that emergency clinicians are able to assess and treat conditions contributing to low cardiac output states. This review describes the important aspects of the third generation of LVADs and their complications as well as common management approaches for the emergency physician.

Objective Despite advances in treatment, massive pulmonary embolism (PE) remains associated with significant morbidity and mortality. The role of venoarterial extracorporeal membrane oxygenation (VA ECMO) in the setting of massive PE is evolving and includes potential roles both in initial management and as a rescue strategy. Design Single-center case series that reported demographics and outcomes for patients with massive PE who underwent VA ECMO. Setting This investigation was performed at a quaternary referral center with several hospitals throughout the greater Atlanta, GA, area. Participants The study comprised adult patients (age ≥18 y) admitted to the authors’ hospital system. Patients were identified using an internal registry of ECMO patients that contains basic demographic information (age, weight, treatment dates and times, ECMO configuration) and primary diagnosis. Interventions No interventions were performed. Measurements and Main Results Seventeen patients who met the inclusion criteria were identified, with 16 patients cannulated peripherally and one patient cannulated centrally for VA ECMO. Survival to hospital discharge was 80% for patients who underwent VA ECMO as an initial approach versus 42% for those in whom it was used as a rescue modality. Conclusions The results suggested that patients placed on VA ECMO earlier during their course of massive PE may have improved mortality. Additional investigation is needed to clarify the optimal sequence and timing of therapies surrounding the initiation of VA ECMO in patients with massive PE.

Supplemental Digital Content is available in the text., Objectives: Increasing time to mechanical ventilation and high-flow nasal cannula use may be associated with mortality in coronavirus disease 2019. We examined the impact of time to intubation and use of high-flow nasal cannula on clinical outcomes in patients with coronavirus disease 2019. Design: Retrospective cohort study. Setting: Six coronavirus disease 2019-specific ICUs across four university-affiliated hospitals in Atlanta, Georgia. Patients: Adults with laboratory-confirmed severe acute respiratory syndrome coronavirus 2 infection who received high-flow nasal cannula or mechanical ventilation. Interventions: None. Measurements and Main Results: Among 231 patients admitted to the ICU, 109 (47.2%) were treated with high-flow nasal cannula and 97 (42.0%) were intubated without preceding high-flow nasal cannula use. Of those managed with high-flow nasal cannula, 78 (71.6%) ultimately received mechanical ventilation. In total, 175 patients received mechanical ventilation; 44.6% were female, 66.3% were Black, and the median age was 66 years (interquartile range, 56–75 yr). Seventy-six patients (43.4%) were intubated within 8 hours of ICU admission, 57 (32.6%) between 8 and 24 hours of admission, and 42 (24.0%) greater than or equal to 24 hours after admission. Patients intubated within 8 hours were more likely to have diabetes, chronic comorbidities, and higher admission Sequential Organ Failure Assessment scores. Mortality did not differ by time to intubation (≤ 8 hr: 38.2%; 8–24 hr: 31.6%; ≥ 24 hr: 38.1%; p = 0.7), and there was no association between time to intubation and mortality in adjusted analysis. Similarly, there was no difference in initial static compliance, duration of mechanical ventilation, or ICU length of stay by timing of intubation. High-flow nasal cannula use prior to intubation was not associated with mortality. Conclusions: In this cohort of critically ill patients with coronavirus disease 2019, neither time from ICU admission to intubation nor high-flow nasal cannula use were associated with increased mortality. This study provides evidence that coronavirus disease 2019 respiratory failure can be managed similarly to hypoxic respiratory failure of other etiologies.

Acute Cor Pulmonale in Covid-19 Five cases of acute cor pulmonale in patients with Covid-19 are described. Although acute pulmonary thromboembolism was the most likely cause of right ventricular fa...

Given the near-universal implementation of electronic medical records (EMRs) in emergency departments (EDs), emergency medicine (EM) residents spend significant time interfacing with EMRs without any established national curriculum to learn best practices. While EMRs have the potential to increase physician efficiency and improve the quality of documentation, they have also been cited as a factor in physician burnout. Understanding the target audience of the EMR, knowing what and when to chart, and practicing time-saving strategies can streamline the process of charting. We review the literature on the current state of EMR documentation by residents and provide recommendations for best practices.

Cardiovascular disease remains the leading cause of death in the United States, and cardiopulmonary bypass is a cornerstone in the surgical management of many related disease states. Pathophysiologic changes associated both with extracorporeal circulation and shock can beget a syndrome of low systemic vascular resistance paired with relatively preserved cardiac output, termed vasoplegia. While increased vasopressor requirements accompany vasoplegia, related pathophysiologic mechanisms may also lead to true catecholamine resistance, which is associated with further heightened mortality. The introduction of a second non-catecholamine vasopressor, angiotensin II, and non-specific nitric oxide scavengers offers potential means by which to manage this challenging phenomenon. This narrative review addresses both the definition, risk factors, and pathophysiology of vasoplegia and potential therapeutic interventions.

Lactic acidosis is a clinical entity that demands rapid assessment and treatment to prevent significant morbidity and mortality. With increased lactate use across many clinical scenarios, lactate values themselves cannot be interpreted apart from their appropriate clinical picture. The significance of Type B lactic acidosis is likely understated in the emergency department (ED). Given the mortality that sepsis confers, a serum lactate is an important screening study. That said, it is with extreme caution that we should interpret and react to the resultant elevated value. We report a patient with a significant lactic acidosis. Though he had a high lactate value, he did not require aggressive resuscitation. A different classification scheme for lactic acidosis that focuses on the bifurcation of the “dangerous” and “not dangerous” causes of lactic acidosis may be of benefit. In addition, this case is demonstrative of the potential overuse of lactates in the ED.