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Biomedical subjects

R G Hart

Publications and source records attributed to R G Hart.

At least 163 records · Page 9Linked to original sources
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Stress in the emergency department clerical staff.

Clerical staff are vital for the effective management of the emergency department. A survey of emergency department clerks was conducted to determine the prevalence and types of stress in their jobs. Forty-six of fifty surveys were completed and returned. Seventy-six percent of the respondents rated their job in the "extremely stressful" range. Stress was a factor responsible for job absenteeism in 24% of the respondents. Most agreed that physician education is necessary.

Administrative Personnel↗
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A novel curriculum for teaching research methodology.

We sought to develop a unique educational course for emergency medicine residents that provides the essential knowledge, the practical skills, and the motivation to complete a research project during the residency. A 5-day mandatory course was designed for first-year emergency medicine residents. Unique features of the curriculum include 1) didactic lectures paired with workshops teaching practical skills and 2) the use of a hypothetical research question ("mock project") that is utilized for practical experience at each step and results in an oral presentation of the completed research project. The course was evaluated with pre- and post-tests of general research knowledge, quality of the final presentations, and a post-course questionnaire. Following completion of the course, the 16 emergency medicine resident participants showed significant improvement in research knowledge, as evidenced by higher median post-test scores and an absolute increase in the pass rate of 50%. Residents' final course presentations were given ratings of "above average" to "superior" by all observing faculty members. Finally, 87.5% of the residents felt that developing a mock project during the course ("hands-on" experience) increased their confidence and interest in conducting future academic research. Thus, an introductory course in research methodology that utilizes didactic lectures paired with appropriate practical workshops and incorporates completion of a mock research project may provide an effective method for teaching emergency medicine residents to conduct research.

Adult↗
PubMedDate not supplied

International Health Fellowship: a proposed curriculum for emergency physicians.

There are a growing number of emergency physicians (EPs) working in health care abroad. There are, however, no formal training programs for EPs in international health. An International Health Fellowship has been developed to provide training for EPs in public health and international medicine. The fundamental competencies of a fellow completing the International Health Fellowship include assessment of medical need, program development, integration of programs into the existing health care framework, and evaluation of projects. This article outlines the philosophy of a training program in international health, provides an overview of the goals and objectives for such a program, and describes the development of an existing fellowship. The International Health Fellowship will develop leaders in the field of global health by combining clinical expertise, practical field experience, formal public health training, and research and education in international health. Physicians completing a fellowship will be prepared to work within foreign health systems to develop, integrate, and evaluate health care programs on an international scale.

Curriculum↗
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Denial of emergency department authorization of potentially high-risk patients by managed care.

This study was designed to evaluate patients presenting to a large urban university emergency department (ED) who were subsequently denied authorization for reimbursed care by their managed care provider and to characterize the denial as potentially safe or unsafe based on published triage criteria. A consecutive case surveillance was performed from October 1, 1994 to September 30, 1995 at a university-based ED (30,000 visits per year) for adult patients in inner-city Chicago. Cases were comprised of adult managed care participants whose providers refused by telephone to authorize payment for ED services and who then left the ED without treatment. Chief complaints and vital signs were used to categorize patients as high-risk or nonemergent based on previously published criteria. A total of 2,965 adult managed care patients presented to the ED during the study period, representing 11.1% of the total ED census. Of these patients, 244 (8.2%) were denied authorization for payment of their care. By previously established criteria, 115 (47.1%) were identified as potentially unstable, 61 (53%) due to abnormal vital signs and 54 (47%) with other high-risk indications such as severe pain, chest pain, or abdominal pain. These potentially high-risk patients may subsequently suffer adverse outcomes. Current guidelines used for telephone triage by managed care to divert patients from our ED do not meet previously published safe triage criteria.

Adult↗
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Increased risk of intracranial hemorrhage when aspirin is combined with warfarin: A meta-analysis and hypothesis.

BACKGROUND: Oral anticoagulation with vitamin K antagonists increases the risk of intracranial hemorrhage; whether addition of aspirin to oral anticoagulation augments this risk is unclear. METHODS: Meta-analysis of randomized clinical trials in which aspirin was added to oral anticoagulants. RESULTS: Six randomized clinical trials were identified, including a total of 3,874 participants. Use of aspirin with oral anticoagulants was associated with more than double the frequency of intracranial hemorrhage (relative risk = 2.4, 95% CI = 1.2-4.8, p = 0.02). CONCLUSION: We hypothesize that aspirin when added to oral vitamin K antagonists may increase the risk of intracranial hemorrhage, but this observation requires confirmation. The magnitude of this effect is uncertain, and the clinical importance is likely different for different patient populations.

Aspirin↗
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Cardioembolic vs. noncardioembolic strokes in atrial fibrillation: frequency and effect of antithrombotic agents in the stroke prevention in atrial fibrillation studies.

BACKGROUND: While atrial fibrillation (AF) increases the risk of cardioembolic stroke, some ischemic strokes in AF patients are noncardioembolic. OBJECTIVES: To assess ischemic stroke mechanisms in AF and to compare their responses to antithrombotic therapies. METHODS: On-therapy analyses of ischemic strokes occurring in 3,950 participants in the Stroke Prevention in Atrial Fibrillation I-III clinical trials. Strokes were classified by presumed mechanism according to specified neurologic features by neurologists unaware of antithrombotic therapy. RESULTS: Of 217 ischemic strokes, 52% were classified as probably cardioembolic, 24% as noncardioembolic, and 24% as of uncertain cause (i.e., 68% of classifiable infarcts were deemed cardioembolic). Compared to those receiving placebo or no antithrombotic therapy, the proportion of cardioembolic stroke was lower in patients taking adjusted-dose warfarin (p = 0.02), while the proportion of noncardioembolic stroke was lower in those taking aspirin (p = 0.06). Most (56%) ischemic strokes occurring in AF patients taking adjusted-dose warfarin were noncardioembolic vs. 16% of strokes in those taking aspirin. Adjusted-dose warfarin reduced cardioembolic strokes by 83% (p < 0.001) relative to aspirin. Cardioembolic strokes were particularly disabling (p = 0.05). CONCLUSIONS: Most ischemic strokes in AF patients are probably cardioembolic, and these are sharply reduced by adjusted-dose warfarin. Aspirin in AF patients appears to primarily reduce noncardioembolic strokes. AF patients at highest risk for stroke have the highest rates of cardioembolic stroke and have the greatest reduction in stroke by warfarin.

Aged↗
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Abrupt change in head position and cerebral infarction.

Eight patients are described who developed infarctions in the vertebral-basilar artery distribution following chiropractic neck manipulation or spontaneous head turning. The angiographic and autopsy findings indicate that injury to the intima of the vertebral artery at the atlantoaxial joint forms a nidus for thrombus formation which may propogate or embolize to involve other vessels in the vertebral-basilar system and result in progressive brainstem infarction. The role of anticoagulation in these patients is discussed.

Adult↗
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Early recurrent embolism associated with nonvalvular atrial fibrillation: a retrospective study.

Nonvalvular atrial fibrillation (NVAF) can be a source of cardiogenic brain embolism. We retrospectively reviewed the clinical features of 56 patients with acute brain infarction and NVAF. Based on clinical criteria, 35 infarcts (63%) were classified as probably embolic, 13 infarcts (23%) as probably nonembolic and 8 infarcts (14%) as of indeterminate pathogenesis. Among the 35 patients with presumed embolic infarcts, 12 patients were immediately anticoagulated without hemorrhagic complications. Of 23 patients who did not receive immediate anticoagulation, three (13%) experienced recurrent embolism (one each to brain, kidney and leg) within 10 days of initial embolism. There were no early recurrent emboli in patients receiving immediate anticoagulation or patients in the nonembolic or indeterminate category. Five additional patients experienced probable brain or systemic emboli within the 11 days prior to the marker stroke event. Including these patients, 20% (8 of 40) of all NVAF patients who were not immediately anticoagulated experienced recurrent embolism within 11 days of the initial embolus. Early recurrent emboli are common in NVAF patients who experience embolic stroke.

Adult↗
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Cerebral infarction associated with lupus anticoagulants--preliminary report.

Hypercoagulability may contribute to stroke in young adults. Lupus anticoagulants (LA) were identified in six patients (4%) of 145 young adults with cerebral infarction. The clinical features of the 6 patients in this survey plus an additional patient from another institution with LA-associated stroke are presented. Four had systemic lupus erythematosus and 3 had idiopathic LA; all had mild thrombocytopenia. In 2 patients, no other conditions associated with stroke were discovered after thorough evaluation. Recurrent arterial thrombosis occurred in 4 of 7 patients during an average of two years of follow-up. Evidence suggests that inhibition of prostacyclin formation may occur with LA, promoting a prothrombotic state.

Adolescent↗