J Emerg Med
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Case Reports
Emergency Bedside Ultrasound Diagnosis of Superior Mesenteric Artery Dissection Complicating Acute Aortic Dissection.
A timely diagnosis of aortic dissection is associated with lower mortality. The use of emergent bedside ultrasound has been described to diagnose aortic dissection. However, there is limited literature regarding the use of bedside ultrasound to identify superior mesenteric artery dissection, a known high-risk feature of aortic dissection. ⋯ Superior mesenteric artery dissection is a high-risk feature of aortic dissection and can be identified with emergent bedside ultrasound.
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Computed tomography (CT) signs of hypovolemic shock have been reported previously. Whether these signs can be used to clinically predict hypovolemic shock remains unclear. ⋯ MSCT can provide useful information for predicting hyovolemic shock in severe multiple-injury patients. An IVC flatness index > 3.02 suggests the presence of hypovolemic shock in severe multiple-injury patients.
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Seat belts uncommonly result in various injuries to the abdominal area, such as mesenteric tears, bowel perforations, and abdominal aortic ruptures. We describe a case of a massive subcutaneous hematoma causing hemorrhagic shock from significant lacerations to the inguinal region, related to the use of a seat belt. ⋯ Seat belts can cause serious injury to the inguinal region, mainly due to shearing forces. In addition to gauze packing, TAE was used effectively to control the hemorrhage in this patient.
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Necrotizing fasciitis (NF) is an infection of the soft tissue, and is fatal if not promptly and aggressively treated. Although it is rare, it is not exceptional; nevertheless, its presentation may be misleading and may delay the diagnosis. We highlight the possible synchronous development of NF in multiple noncontiguous areas. ⋯ "Synchronous" multifocality is not an expected presentation of NF, and it complicates the diagnosis and delays treatment, with a potentially negative impact on outcome.
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Case Reports
An Interesting Cause of Wide Complex Tachycardia: Ashman's Phenomenon in Atrial Fibrillation.
Ashman's phenomenon is an aberrant intraventricular conduction abnormality that occurs in response to a change in QRS cycle length. In atrial fibrillation, Ashman's phenomenon will present as a long RR cycle followed by a short RR cycle, with the subsequent QRS complex manifesting a right bundle branch block morphology. This morphologic variation can create difficulty with electrocardiographic interpretation, and can alter management in patients with this dysrhythmia. ⋯ Ashman's phenomenon should be suspected in atrial fibrillation when there is a long cycle followed by a short cycle, with the subsequent QRS complex manifesting a right bundle branch block pattern. Emergency physician awareness of this phenomenon may improve diagnostic certainty and have an impact on dysrhythmia management.