Pre-hospital coronary care and coronary fatality in the Belfast and Glasgow MONICA populations

Impact of providing case-specific knowledge in simulation: a theory based study of learning

Background

Simulation-based education (SBE) has been lauded for its ability to help students recognise and react appropriately to common and rare circumstances. While healthcare professions have started to implement SBE into their curriculum, there is no evidence to suggest which educational theory is best for implementation. This study explores the usage of cognitive load theory (CLT) and the unified theory of emotional learning (UTEL).

Study design

A mixed methods ordered-allocation cohort study.

Methods

23 patient management teams were allocated into 2 groups. The first group received prior information about the simulation scenario; the second group did not. Each team had 1 student assigned to the role of doctor. The scenarios were filmed at time 1 (T1), time 2 (T2) and follow-up (F/U). The ‘doctor’ role was then graded with a validated checklist by a three-judge panel. The scores were evaluated to determine if prior information enabled better performance. Secondary analysis evaluated the role of gender on performance and also evaluated anxiety at the onset of the simulation.

Results

23 doctors were evaluated. There was no difference between groups in performance (t=1.54, p=0.13). Secondary analysis indicated that gender did not play a role. There was no difference in anxiety between groups at baseline (t=0.67, p=0.51).

Conclusions

Trends were observed, suggesting that when students enter a simulation environment with prior knowledge of the event they will encounter, their performance may be higher. No differences were observed in performance at T2 or F/U. Withholding information appeared to be an inappropriate proxy for emotional learning as no difference in anxiety was observed between groups at baseline. All trends require confirmation with a larger sample size.

Gender differences in acute myocardial infarction, twenty-five years registration

BACKGROUND/OBJECTIVES

The French-speaking Community of Belgium has set up a register of ischaemic cardiopathies (1983-2007). The aim consists in analyzing the evolution of fatal and non-fatal acute coronary events rates as well as the 28 days case fatality on a 25-year period and examine sex differences in lethality.

METHODS

This register assures a standardized procedure according to the MONICA criteria. For each period, we present attack rates and trends analysis. Hospital lethality takes again in-patients and community lethality is calculated starting from all the cases.

RESULTS

The total attack rate is rather stable between 1983 and 2007 for women (from 12 to 19 per 10,000 residents). For men, there is a distinct decline of the total attack rate since 1991 till 1993 (63 to 43 per 10,000 residents). We systematically observe a reduction in risk between men and women according to the age. For each 5-year period, this risk decreases significantly with age and this difference is strongest during the periods 1993-1997 and 1998-2002. The analysis shows also a significant decline in lethality between the 1983-1987 and 1993-1997 periods. Among women, lethality is systematically higher than in men in spite of the presence or the absence of antecedents of myocardial infarction.

CONCLUSIONS

Favourable evolutions in the attack rates of acute coronary events in the study population appear clearly on the 25-year period of observation. The whole lethality rates decreased during the first 15 years of the register; after that, it stabilized.

Constituent country inequalities in myocardial infarction incidence and case fatality in men and women in the United Kingdom, 1996-2005

BACKGROUND

Understanding myocardial infarction (MI) incidence and case fatality trends across the four UK constituent countries is of importance following devolution of the government of health-care services.

METHODS

Retrospective cohort study using a primary care database (5.19 million patients) examining trends in incidence of first MI and 30-day case fatality.

RESULTS

From 1996 to 2005, the incidence of MI decreased in all countries, but reductions were greater in England (men, -3.1%; women, -2.8%) and Wales (men, -3.3%; women, -4.6%) than in Scotland (men, -1.9%; women, -0.6%) and Northern Ireland (men no change, women, -0.8%) (average annual percentage change). Greater reductions in England and Wales than Scotland and Northern Ireland meant a widening of north-south difference in MI incidence over the study period. Downward trends in 30-day case fatality were found in each country but less regional variation was evident (England men, -12.0%, women, -11.0%; Wales men, -18.4%, women, -12.6%; Scotland men, -9.5%, women, -9.0%; Northern Ireland men, -8.6%, women, -13.0%).

CONCLUSION

From 1996 to 2005, downward trends in the incidence of first MI and 30-day case fatality were evident in each constituent country. Greater improvements in case fatality, compared with incidence, were found within each country.

Evaluation of an algorithm for estimating a patient's life threat risk from an ambulance call

Background

Utilizing a computer algorithm, information from calls to an ambulance service was used to calculate the risk of patients being in a life-threatening condition (life threat risk), at the time of the call. If the estimated life threat risk was higher than 10%, the probability that a patient faced a risk of dying was recognized as very high and categorized as category A+. The present study aimed to review the accuracy of the algorithm.

Methods

Data collected for six months from the Yokohama new emergency system was used. In the system, emergency call workers interviewed ambulance callers to obtain information necessary to assess triage, which included consciousness level, breathing status, walking ability, position, and complexion. An emergency patient's life threat risk was then estimated by a computer algorithm applying logistic models. This study compared the estimated life threat risk occurring at the time of the emergency call to the patients' state or severity of condition, i.e. death confirmed at the scene by ambulance crews, resulted in death at emergency departments, life-threatening condition with occurrence of cardiac and/or pulmonary arrest (CPA), life-threatening condition without CPA, serious but not life-threatening condition, moderate condition, and mild condition. The sensitivity, specificity, predictive values, and likelihood ratios of the algorithm for categorizing A+ were calculated.

Results

The number of emergency dispatches over the six months was 73,992. Triage assessment was conducted for 68,692 of these calls. The study targets account for 88.8% of patients who were involved in triage calls. There were 2,349 cases where the patient had died or had suffered CPA. The sensitivity, specificity, positive predictive value, negative predictive value, positive likelihood ratio and negative likelihood ratio of the algorithm at predicting cases that would result in a death or CPA were 80.2% (95% confidence interval: 78.6% - 81.8%), 96.0% (95.8% - 96.1%), 42.6% (41.1% - 44.0%), 99.2% (99.2% - 99.3%), 19.9 (18.8 - 21.1), and 0.21 (0.19 - 0.22), respectively.

Conclusion

A patient's life threat risk was quantitatively assessed at the moment of the emergency call with a moderate level of accuracy.