Improved prehospital triage for acute cardiac care: results from HART-c, a multicentre prospective study.

BACKGROUND: Cardiac symptoms are one of the most prevalent reasons for emergency department visits. However, over 80% of patients with such symptoms are sent home after acute cardiovascular disease has been ruled out. OBJECTIVE: The Hollands-Midden Acute Regional Triage-cardiology (HART-c) study aimed to investigate whether a novel prehospital triage method, combining prehospital and hospital data with expert consultation, could increase the number of patients who could safely stay at home after emergency medical service (EMS) consultation. METHODS: The triage method combined prehospital EMS data, such as electrocardiographic and vital parameters in real time, and data from regional hospitals (including previous medical records and admission capacity) with expert consultation. During the 6­month intervention and control periods 1536 and 1376 patients, respectively, were consulted by the EMS. The primary endpoint was the percentage change of patients who could stay at home after EMS consultation. RESULTS: The novel triage method led to a significant increase in patients who could safely stay at home, 11.8% in the intervention group versus 5.9% in the control group: odds ratio 2.31 (95% confidence interval (CI) 1.74-3.05). Of 181 patients staying at home, only 1 (< 1%) was later diagnosed with ACS; no patients died. Furthermore the number of interhospital transfers decreased: relative risk 0.81 (95% CI 0.67-0.97). CONCLUSION: The HART­c triage method led to a significant decrease in interhospital transfers and an increase in patients with cardiac symptoms who could safely stay at home. The presented method thereby reduced overcrowding and, if implemented throughout the country and for other medical specialties, could potentially reduce the number of cardiac and non-cardiac hospital visits even further.

An easy-to-use scoring index to determine severity of mitral regurgitation by 2D echocardiography in clinical practice.

PURPOSE: Mitral regurgitation (MR) grading by two-dimensional transthoracic echocardiography is challenging, but important to determine the best treatment strategy in patients with MR. Current guidelines advocate an integrative approach, although no recommendation is provided on how to do so. An easy-to-use index will be helpful for standardized and reproducible MR grading. METHODS: Eleven echocardiographic parameters were retrospectively evaluated in 145 patients with moderate or severe MR. Parameters were scored positive or negative for severe MR, where expert panel consensus reading was considered as the reference standard. Logistic regression was performed, and adjusted coefficients were used to create a risk score for severe MR per patient (ROSE-index). The best cutoff with corresponding predictive values was determined. RESULTS: Eighty-two percent of all parameters could be determined. Multivariable analysis revealed five parameters that remained significant predictors for severe MR: morphology, jet characteristics, vena contracta, systolic reversal, and left ventricular dimensions. With different weighing, a total score of 8 could be obtained. Median total ROSE-index score for moderate (2.0) and severe MR (5.0) did significantly differ. The cutoff score (≥4) revealed sensitivity 0.84 and specificity 0.83 to diagnose severe MR. Negative predictive value was 100% for score 0 and 1; score 6-8 showed a 100% positive predictive value. Inter- and intra-observer agreements were excellent (K-values >0.80). CONCLUSION: Here, we propose an easy-to-use tool for integrated analysis of guideline parameters to assess MR severity. Using this so-called ROSE-index revealed reliable and reproducible assessment of severe MR (cutoff≥4) that may be helpful for clinical decision making.

Selecting patients with non-ST-elevation acute coronary syndrome for coronary angiography: a nationwide clinical vignette study in the Netherlands.

OBJECTIVE: Cardiac guidelines recommend that the decision to perform coronary angiography (CA) in patients with Non-ST-Elevation Acute Coronary Syndrome (NST-ACS) is based on multiple factors. It is, however, unknown how cardiologists weigh these factors in their decision-making. The aim was to investigate the importance of different clinical characteristics, including information derived from risk scores, in the decision-making of Dutch cardiologists regarding performing CA in patients with suspected NST-ACS. DESIGN: A web-based survey containing clinical vignettes. SETTING AND PARTICIPANTS: Registered Dutch cardiologists were approached to complete the survey, in which they were asked to indicate whether they would perform CA for 8 vignettes describing 7 clinical factors: age, renal function, known coronary artery disease, persistent chest pain, presence of risk factors, ECG findings and troponin levels. Cardiologists were divided into two groups: group 1 received vignettes 'without' a risk score present, while group 2 completed vignettes 'with' a risk score present. RESULTS: 129 (of 946) cardiologists responded. In both groups, elevated troponin levels and typical ischaemic changes (p<0.001) made cardiologists decide more often to perform CA. Severe renal dysfunction (p<0.001) made cardiologists more hesitant to decide on CA. Age and risk score could not be assessed independently, as these factors were strongly associated. Inspecting the factors together showed, for example, that cardiologists were more hesitant to perform CA in elderly patients with high-risk scores than in younger patients with intermediate risk scores. CONCLUSIONS: When deciding to perform in-hospital CA (≤72 hours after patient admission) in patients with suspected NST-ACS, cardiologists tend to rely mostly on troponin levels, ECG changes and renal function. Future research should focus on why CA is less often recommended in patients with severe renal dysfunction, and in elderly patients with high-risk scores. In addition, the impact of age and risk score on decision-making should be further investigated.

The predictive value of the exercise ECG for major adverse cardiac events in patients who presented with chest pain in the emergency department.

BACKGROUND: To improve early diagnostic and therapeutic decision making, we designed the HEART score for chest pain patients in the emergency department (ED). HEART is an acronym of its components: History, ECG, Age, Risk factors and Troponin. Currently, many chest pain patients undergo exercise testing on the consecutive days after presentation. However, it may be questioned how much diagnostic value the exercise ECG adds when the HEART score is already known. METHODS: A subanalysis was performed of a multicenter prospective validation study of the HEART score, consisting of 248 patients who underwent exercise testing within 7 days after presentation in the ED. Outcome is the predictive value of exercise testing in terms of major adverse cardiac events (MACE) within 6 weeks after presentation. RESULTS: In low-risk patients (HEART score ≤ 3), 63.1 % were negative tests, 28.6 % non-conclusive and 8.3 % positive; the latter were all false positives. In the intermediate-risk group (HEART score 4-6), 30.9 % were negative tests, 60.3 % non-conclusive and 8.8 % positive, half of these positives were false positives. In the high-risk patients (HEART score ≥ 7), 14.3 % were negative tests, 57.1 % non-conclusive and 28.6 % positive, of which half were false positives. CONCLUSION: In a chest pain population risk stratified with HEART, exercise testing has only a modest contribution to clinical decision making. 50 % of all tests are non-conclusive, with high rates of false positive tests in all three risk groups. In intermediate-risk patients, negative exercise tests may contribute to the exclusion of disease. Clinicians should rather go for sensitive tests, in particular in patients with low HEART scores.