Improving technical and non-technical skills of emergency medicine residents through a program based on high-fidelity simulation.

We evaluated the effectiveness of a training program with high-fidelity simulation (HFS) to improve technical (TS) and non-technical skills (NTS) of residents in Emergency Medicine. We conducted a 2-year training program for the management of a critical patient based on HFS (6 sessions for every year, four teams who performed 4 scenarios per session). At the beginning of the training program, all participants received a presentation of Crisis Resource Management (CRM) principles. Each session covered a different topic in Emergency Medicine Curriculum. TSs were measured as the proportion of completed tasks in the following areas: airway, breathing, circulation, disability and exposure (ABCDE) assessment and management, completion of anamnesis based on AMPLE (allergy, medications, previous illness, last meal and event) scheme, diagnostic and therapeutic assessment. NTSs were rated by the Clinical Teamwork Scale (CTS). Scores' values and the percentage of correctly performed actions were presented as median with interquartile range. Friedmann non-parametric test was employed to evaluate the trend of TS and NTS over the following sessions. Among the TS, the assessment and management of ABCDE and completion of therapeutic tasks improved (all p < 0.05). The completion of diagnostic tasks (p = 0.050) tended toward significant improvement. The overall CTS score (first session 61 ± 17, last session 84 ± 16, p < 0.001) as well as Communication (first 13.7 ± 3.6, last 18.7 ± 3.5, p < 0.001), Situational Awareness (first 5.3 ± 1.8, last 6.4 ± 1.4, p = 0.012) and Role Responsibility subscores (first 9.7 ± 2.8, last 12.1 ± 3.7, p < 0.001) increased through the following sessions. Therefore, HFS has proven to be an effective instrument to improve TS and NTS among Emergency Medicine residents.

High-frequency QRS analysis superior to conventional ST-segment analysis of women with chest pain.

BACKGROUND: The novel analysis of high-frequency QRS components (HF/QRS) has been proposed in patients with chest pain (CP) referred for exercise tolerance test (ex-ECG). We sought to evaluate the prognostic role of exercise high-frequency QRS-analysis (ex-HF/QRS) in patients with recent-onset stable CP, in the emergency setting. METHODS: Patients with CP underwent ex-ECG. A decrease greater than or equal to 50% of the signal of HF/QRS intensity was considered as index of ischemia as ST-segment depression greater than or equal to 2 mm or greater than or equal to 1 mm associated with CP. Exclusion criteria were QRS duration greater than or equal to 120 milliseconds and inability to exercise. Baseline characteristics were adjusted with the propensity score matching specifying nearest-neighbor matching in cardiovascular risk factors and risk scores. The primary end point was the composite of coronary stenosis greater than or equal to 70% or acute coronary syndrome, revascularization, and cardiac death on the 6-month follow-up. RESULTS: Of 589 patients, 22 achieved the end point. On the univariate analysis, known cardiovascular disease, GRACE score, and ex-HF/QRS were predictors of the end point. On the multivariate analysis, only ex-HF/QRS was predictor of the end point (odd ratio, 28; 95% confidence interval [CI], 6-120; P < .001). Overall, the ex-HF/QRS when compared to ex-ECG showed higher sensitivity (91% vs 27%; P = .02), lower specificity (74% vs 86%; P = .09), and comparable negative predictive value (99% vs 97%; P = .78). Receiver operating characteristic curve analysis showed the larger area of ex-HF/QRS (0.83; 95% CI, 0.75-0.90) over ex-ECG (0.57; CI, 0.44-0.70) and GRACE score (0.65; CI, 0.54-0.76); P < .03 on C-statistic. Women showed the largest area (0.89; CI, 0.83-0.95; P < .03) vs the other clinical data. CONCLUSIONS: In patients with CP, the novel ex-HF/QRS analysis has a valuable incremental prognostic role over ex-ECG, especially in women.

High-frequency QRS analysis compared to conventional ST-segment analysis in patients with chest pain and normal ECG referred for exercise tolerance test.

BACKGROUND: The novel analysis of high-frequency QRS components (HFQRS-analysis) has been proposed in patients with chest pain (CP) and normal electrocardiography (ECG) referred for exercise tolerance test (ex-ECG). The aim of the study was to compare the diagnostic value of ex-ECG with ex-HFQRS-analysis. METHODS: Patients with CP and normal ECG, troponin, and echocardiography were considered. All patients underwent ex-ECG for conventional ST-segment-analysis and ex-HFQRS-analysis. A decrease ≥ 50% of the HFQRS signal intensity recorded in at least 2 contiguous leads was considered an index of ischemia, as ST-segment depression ≥ 2 mm or ≥ 1 mm and CP on ex-ECG. Exclusion criteria were: QRS duration ≥ 120 ms and inability to exercise. End-point: The composite of coronary stenosis ≥ 70% or acute coronary syndrome, revascularization, cardiovascular death at 3-month follow-up. RESULTS: Three-hundred thirty-seven patients were enrolled (age 60 ± 15 years). The percent-age of age-adjusted maximal predicted heart rate was 89 ± 10 beat per minute and the maximal systolic blood pressure was 169 ± 23 mm Hg. Nineteen patients achieved the end-point. In multivariate analysis, both ex-ECG and ex-HFQRS were predictors of the end-point. The ex-HFQRS-analysis showed higher sensitivity (63% vs. 26%; p < 0.05), lower specificity (68% vs. 95%; p < 0.001), and comparable negative predictive value (97% vs. 96%; p = 0.502) when compared to ex-ECG-analysis. Receiver operator characteristics analysis showed the incremental diagnostic value of HFQRS (area: 0.655, 95% CI 0.60-0.71) over conventional ex-ECG (0.608, CI 0.55-0.66) and CP score (0.530, CI 0.48-0.59), however without statistical significance in pairwise comparison by C-statistic. CONCLUSIONS: In patients with CP submitted to ex-ECG, the novel ex-HFQRS-analysis shows a valuable incremental diagnostic value over ST-segment-analysis.