scholarly journals Development and validation of techniques for phenotyping ST-elevation myocardial infarction encounters from electronic health records

JAMIA Open ◽  
2021 ◽  
Vol 4 (3) ◽  
Author(s):  
Sulaiman Somani ◽  
Stephen Yoffie ◽  
Shelly Teng ◽  
Shreyas Havaldar ◽  
Girish N Nadkarni ◽  
...  
Keyword(s):  
Myocardial Infarction ◽  
Electronic Health Records ◽  
Hospital Admissions ◽  
Coronary Intervention ◽  
St Elevation Myocardial Infarction ◽  
Health Records ◽  
St Elevation ◽  
Electronic Health ◽  
Cardiac Catheterizations ◽  
Discharge Summaries

Abstract Objectives Classifying hospital admissions into various acute myocardial infarction phenotypes in electronic health records (EHRs) is a challenging task with strong research implications that remains unsolved. To our knowledge, this study is the first study to design and validate phenotyping algorithms using cardiac catheterizations to identify not only patients with a ST-elevation myocardial infarction (STEMI), but the specific encounter when it occurred. Materials and Methods We design and validate multi-modal algorithms to phenotype STEMI on a multicenter EHR containing 5.1 million patients and 115 million patient encounters by using discharge summaries, diagnosis codes, electrocardiography readings, and the presence of cardiac catheterizations on the encounter. Results We demonstrate that robustly phenotyping STEMIs by selecting discharge summaries containing “STEM” has the potential to capture the most number of STEMIs (positive predictive value [PPV] = 0.36, N = 2110), but that addition of a STEMI-related International Classification of Disease (ICD) code and cardiac catheterizations to these summaries yields the highest precision (PPV = 0.94, N = 952). Discussion and Conclusion In this study, we demonstrate that the incorporation of percutaneous coronary intervention increases the PPV for detecting STEMI-related patient encounters from the EHR.

scholarly journals An electronic health records cohort study on heart failure following myocardial infarction in England: incidence and predictors

BMJ Open ◽  
2018 ◽  
Vol 8 (3) ◽  
pp. e018331 ◽  
Author(s):  
Johannes M I H Gho ◽  
Amand F Schmidt ◽  
Laura Pasea ◽  
Stefan Koudstaal ◽  
Mar Pujades-Rodriguez ◽  
...  
Keyword(s):  
Myocardial Infarction ◽  
Heart Failure ◽  
Electronic Health Records ◽  
Hospital Admissions ◽  
Sensitivity Analyses ◽  
Mortality Data ◽  
Care Hospital ◽  
Health Records ◽  
Primary Care Hospital ◽  
Electronic Health

ObjectivesTo investigate the incidence and determinants of heart failure (HF) following a myocardial infarction (MI) in a contemporary cohort of patients with MI using routinely collected primary and hospital care electronic health records (EHRs).MethodsData were used from the CALIBER programme, linking EHRs in England from primary care, hospital admissions, an MI registry and mortality data. Subjects were eligible if they were 18 years or older, did not have a history of HF and survived a first MI. Factors associated with time to HF were examined using Cox proportional hazard models.ResultsOf the 24 479 patients with MI, 5775 (23.6%) developed HF during a median follow-up of 3.7 years (incidence rate per 1000 person-years: 63.8, 95% CI 62.2 to 65.5). Baseline characteristics significantly associated with developing HF were: atrial fibrillation (HR 1.62, 95% CI 1.51 to 1.75), age (per 10 years increase: 1.45, 1.41 to 1.49), diabetes (1.45, 1.35 to 1.56), peripheral arterial disease (1.38, 1.26 to 1.51), chronic obstructive pulmonary disease (1.28, 1.17 to 1.40), greater socioeconomic deprivation (5th vs 1st quintile: 1.27, 1.13 to 1.41), ST-segment elevation MI at presentation (1.19, 1.11 to 1.27) and hypertension (1.16, 1.09 to 1.23). Results were robust to various sensitivity analyses such as competing risk analysis and multiple imputation.ConclusionIn England, one in four survivors of a first MI develop HF within 4 years. This contemporary study demonstrates that patients with MI are at considerable risk of HF. Baseline patient characteristics associated with time until HF were identified, which may be used to target preventive strategies.

Optimum Therapies for ST-Elevation Myocardial Infarction Managed with Primary Percutaneous Coronary Intervention

2012 ◽  
Vol 7 (2) ◽  
pp. 81
Author(s):  
Bruce R Brodie ◽  
Keyword(s):  
Myocardial Infarction ◽  
Percutaneous Coronary Intervention ◽  
Primary Percutaneous Coronary Intervention ◽  
Great Majority ◽  
Coronary Intervention ◽  
St Elevation Myocardial Infarction ◽  
Stent Deployment ◽  
Aspiration Thrombectomy ◽  
Percutaneous Coronary ◽  
St Elevation

This article reviews optimum therapies for the management of ST-elevation myocardial infarction (STEMI) with primary percutaneous coronary intervention (PCI). Optimum anti-thrombotic therapy includes aspirin, bivalirudin and the new anti-platelet agents prasugrel or ticagrelor. Stent thrombosis (ST) has been a major concern but can be reduced by achieving optimal stent deployment, use of prasugrel or ticagrelor, selective use of drug-eluting stents (DES) and use of new generation DES. Large thrombus burden is often associated poor outcomes. Patients with moderate to large thrombus should be managed with aspiration thrombectomy and patients with giant thrombus should be treated with glycoprotein IIb/IIIa inhibitors and may require rheolytic thrombectomy. The great majority of STEMI patients presenting at non-PCI hospitals can best be managed with transfer for primary PCI even with substantial delays. A small group of patients who present very early, who are at high clinical risk and have long delays to PCI, may best be treated with a pharmaco-invasive strategy.

Risk factors of coronary microvascular obstruction (Preprint)

2020 ◽  
Author(s):  
Yong Li ◽  
Shuzheng Lyu
Keyword(s):  
Risk Factors ◽  
Myocardial Infarction ◽  
Percutaneous Coronary Intervention ◽  
Logistic Regression ◽  
Microvascular Obstruction ◽  
Coronary Intervention ◽  
St Elevation Myocardial Infarction ◽  
Neutrophil Percentage ◽  
Percutaneous Coronary ◽  
St Elevation

BACKGROUND Coronary microvascular obstruction /no-reflow(CMVO/NR) is a predictor of long-term mortality in survivors of ST elevation myocardial infarction (STEMI) underwent primary percutaneous coronary intervention (PPCI). OBJECTIVE To identify risk factors of CMVO/NR. METHODS Totally 2384 STEMI patients treated with PPCI were divided into two groups according to thrombolysis in myocardial infarction(TIMI) flow grade:CMVO/NR group(246cases,TIMI 0-2 grade) and control group(2138 cases,TIMI 3 grade). We used univariable and multivariable logistic regression to identify risk factors of CMVO/NR. RESULTS A frequency of CMVO/NR was 10.3%(246/2384). Logistic regression analysis showed that the differences between the two groups in age(unadjusted odds ratios [OR] 1.032; 95% CI, 1.02 to 1.045; adjusted OR 1.032; 95% CI, 1.02 to 1.046 ; P <0.001), periprocedural bradycardia (unadjusted OR 2.357 ; 95% CI, 1.752 to 3.171; adjusted OR1.818; 95% CI, 1.338 to 2.471 ; P <0.001),using thrombus aspirationdevices during operation (unadjusted OR 2.489 ; 95% CI, 1.815 to 3.414; adjusted OR1.835; 95% CI, 1.291 to 2.606 ; P =0.001),neutrophil percentage (unadjusted OR 1.028 ; 95% CI, 1.014 to 1.042; adjusted OR1.022; 95% CI, 1.008 to 1.036 ; P =0.002) , and completely block of culprit vessel (unadjusted OR 2.626; 95% CI, 1.85 to 3.728; adjusted-OR 1.656;95% CI, 1.119 to 2.45; P =0.012) were statistically significant ( P <0. 05). The area under the receiver operating characteristic curve was 0.6896 . CONCLUSIONS Age , periprocedural bradycardia, using thrombus aspirationdevices during operation, neutrophil percentage ,and completely block of culprit vessel may be independent risk factors for predicting CMVO/NR. We registered this study with WHO International Clinical Trials Registry Platform (ICTRP) (registration number: ChiCTR1900023213; registered date: 16 May 2019).http://www.chictr.org.cn/edit.aspx?pid=39057&htm=4. Key Words: Coronary disease ST elevation myocardial infarction No-reflow phenomenon Percutaneous coronary intervention

Regional variation in appropriate care for ST-elevation myocardial infarction in Finland

2020 ◽  
Vol 30 (Supplement_5) ◽  
Author(s):  
E Reissell ◽  
S Lumme ◽  
M Satokangas ◽  
K Manderbacka
Keyword(s):  
Myocardial Infarction ◽  
Regional Variation ◽  
Regional Differences ◽  
Coronary Intervention ◽  
Register Data ◽  
St Elevation Myocardial Infarction ◽  
Academic Affiliation ◽  
Episode Of Care ◽  
Appropriate Care ◽  
St Elevation

Abstract Background Timely primary percutaneous coronary intervention (PCI) is currently the treatment of choice for ST-elevation myocardial infarction (STEMI). Although cardiac units were established in all central hospitals in late 1990s for sparsely populated Finland, studies have shown that regional variation has increased. Additionally, the dense Finnish hospital network includes non-cardiac facilities where patients may be inappropriately admitted and then transferred for PCI. We aim to investigate the current regional differences in receiving timely PCI, determinants of these variations and the effect of hospital transfers. Methods Finnish Hospital Discharge Register data on PCIs for STEMI patients in 2015-17 were linked to register data on socio-demographics. In these preliminary analyses we used logistic regression modelling. Results Our results suggest that there were significant regional differences both for timely PCI in STEMI patients and in the probability of hospital transfers during an episode of care. The regional odds ratios (OR) for receiving PCI on time varied from 0.41 (95% confidence interval 0.33-0.52) to 2.73 (2.09-3.57) compared with the capital region when controlling for age, gender and hospital transfers. The ORs for being transferred during an episode of care varied from 0.26 (0.15-0.44) to 16.6 (11.6-23.6). Patients not transferred were more likely to receive PCI (OR 1.89 (1.67-2.15)). Men received PCI on time more often (OR 1.31 (1.18-1.46)) and women were more likely to be transferred (OR 1.29 (1.15-1.45)). Conclusions The probability for receiving PCI on time was related to the size of the hospital's population base and academic affiliation and inversely to transfers between hospitals. Hospital transfers during care episode and atypical symptoms often seen in women may cause critical delays for PCI. Other determinants for variation of timely PCI and its effects on equity will be analysed using multilevel modelling. Key messages Appropriate care for STEMI varies across regions and reflects inept practices in provider network. These findings are more pronounced in women showing persisting gender-related inequity.

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