Association of Cardiac Care Regionalization With Access, Treatment, and Mortality Among Patients With ST-Segment Elevation Myocardial Infarction

Association of Physician Coordination With Interfacility Transfer Acceptance Timeliness

Objectives

Interfacility transfer for time-sensitive emergencies involves rapid and complex care transitions between facilities. We sought to validate relational coordination, a 7-dimension measure of coordination in which a higher score reflects higher-quality coordination, to examine how the quality of coordination affects timeliness in an emergency care setting.

Study Design

Retrospective observational cohort design.

Methods

We used a novel method to examine how the quality of coordination between physicians at the time of transfer affects timeliness of physician acceptance. We recorded physician-to-physician conversations from the transfer of patients with ST-segment elevation myocardial infarction (STEMI), a time-sensitive emergency requiring immediate intervention to prevent morbidity and mortality.

Results

We identified 81 patients experiencing STEMI who were transferred between August 1, 2016, and March 31, 2018. Descriptive statistics, interrater reliability (Spearman correlation coefficients), and generalized linear models were used to examine the association between relational coordination and the physician time-to-acceptance duration. Median (IQR) relational coordination score was 445 (403-493) of a maximum of 700, and median (IQR) time to acceptance was 90.4 (60.2-140.8) seconds. Agreement between abstractors was high (ρ = 0.76). There was a significant, negative relationship between relational coordination and time to acceptance (ρ = -0.38; P < .001). Every 40-point increase in relational coordination was associated with a 25% reduction in time to acceptance.

Conclusions

Relational coordination not only demonstrated high interrater reliability, but we also found that higher-quality coordination was associated with faster physician acceptance during time-sensitive transfers. Use of such measures may provide a mechanism to improve the quality of care and outcomes for patients with STEMI who experience interfacility transfers.

Short- and long-term survival after ST-elevation myocardial infarction treated with pharmacoinvasive versus primary percutaneous coronary intervention strategy: a prospective cohort study

Objective

Compare survival in patients with ST-elevation myocardial infarction (STEMI) treated with a pharmacoinvasive (PI) or primary percutaneous coronary intervention (pPCI) strategy based on estimated time to PCI.

Design

Prospective observational cohort study. Consecutive STEMI patients were registered on admission to our PCI centre and classified in a PI or pPCI group, based on the reperfusion strategy chosen in the prehospital or local hospital location. Time and cause of death was provided by the Norwegian Cause of Death registry. Mortality at 30 days, Kaplan-Meier survival and incidence of cardiovascular (CV) death was estimated. Adjusted effect of PI versus pPCI strategy on survival was estimated using logistic and Cox regression and propensity score weighting.

Setting

Single-centre registry in Norway during 2005–2011, within a regional STEMI network allocating patients to a PI strategy if estimated time to PCI >120 min.

Primary outcomes

30-day mortality and survival during follow-up.

Secondary outcome

Incidence of CV death during follow-up.

Results

4061 STEMI patients <80 years were included, 527 (13%) treated with a PI strategy and 3534 (87%) with a pPCI strategy. Median symptom-to-needle time was 110 min (25–75th percentile 75–163) in the PI group vs symptom-to-balloon 230 min (149–435) in the pPCI group. 30-day mortality was 3.2% and 5.0% in the PI and pPCI groups (OR_adjusted0.58 (95% CI 0.30 to 1.13)) and 8-year survival was 85.9% (95% CI 80.9% to 89.6%) and 79.3% (95% CI 76.9% to 81.6%), respectively (HR_adjusted 0.72 (95% CI 0.53 to 0.99)). Unadjusted incidence of 8-year CV death was 7.0% (95% CI 4.4% to 10.4%) in the PI group vs 12.4% (95% CI 9.9% to 15.2%) in the pPCI group. Adjusted long-term CV death was also lower in the PI group.

Conclusion

STEMI patients treated with a PI strategy experienced better survival compared with a pPCI strategy, also when adjusting for baseline characteristics. This supports using a PI strategy for eligible STEMI patients when pPCI cannot be performed within 120 min.

Demographic and Regional Trends of Mortality in Patients With Acute Myocardial Infarction in the United States, 1999 to 2019

Acute myocardial infarction (AMI)-related mortality has been decreasing within the United States because of improvements in management and preventive efforts; however, persistent disparities in demographic subsets such as race may exist. In this study, the nationwide trends in mortality related to AMI in adults in the United States from 1999 to 2019 are described. Trends in mortality related to AMI were assessed through a cross-sectional analysis of the Centers for Disease Control and Prevention Wide-Ranging Online Data for Epidemiologic Research database. Age-adjusted mortality rates per 100,000 people and associated annual percentage change and average annual percentage changes with 95% confidence intervals (CIs) were determined. Joinpoint regression was used to assess the trends in the overall, demographic (gender, race/ethnicity, age), and regional groups. Between 1999 and 2019, a total of 3,655,274 deaths related to AMI occurred. In the overall population, age-adjusted mortality rates decreased from 134.7 (95% CI 134.2 to 135.3) in 1999 to 48.5 (95% CI 48.3 to 48.8) in 2019 with an average annual percentage change of -5.0 (95% CI -5.5 to -4.6). Higher mortality rates were seen in Black individuals, men, and those living in the South. Patients older than 85 years experienced substantial decreases in mortality. In addition, rural counties had persistently higher mortality rates in comparison with urban counties. In conclusion, despite decreasing mortality rates in all groups, persistent disparities continued to exist throughout the study period.

Differential benefits of cardiac care regionalization based on driving time to percutaneous coronary intervention

BACKGROUND

Patients with ST-elevation myocardial infarction (STEMI) require timely reperfusion, and percutaneous coronary intervention (PCI) decreases morbidity and mortality. Regionalization of STEMI care has increased timeliness and use of PCI, but it is unknown whether benefits to regionalization depend on a community's distance from its nearest PCI center. We sought to determine whether STEMI regionalization benefits, measured by access to PCI centers, timeliness of treatment (same-day or in-hospital PCI), and mortality, differ by baseline distance to nearest PCI center.

METHODS

Using a difference-in-difference-in-differences model, we examined access to PCI-capable hospitals, receipt of PCI either on the day of admission or during the care episode, and health outcomes for patients hospitalized from January 1, 2006, to September 30, 2015.

RESULTS

Of 139,408 patients (2006 to 2015), 51% could reach the nearest PCI center in <30 minutes, and 49% required ≥30 minutes driving time. For communities with baseline access ≥30 minutes, regionalization increased the probability of admission to a PCI-capable hospital by 9.4% and also increased the likelihood of receiving same-day PCI (by 11.2%) and PCI during the hospitalization (by 7.4%). Patients living within 30 minutes did not accrue significant benefits (measured by admission to a PCI-capable hospital or receipt of PCI) from regionalization initiatives. Regionalization more than halved access disparities and completely eliminated treatment disparities between communities ≥30 minutes and communities <30 minutes from the nearest PCI hospital.

CONCLUSIONS

Measured by likelihood of admission to a PCI-capable facility and receipt of PCI, benefits of STEMI regionalization in California accrued only to patients whose nearest PCI center was ≥30 minutes away. We found no mortality benefits of regionalization based on distance from PCI center. Our results suggest that policymakers focus STEMI regionalization efforts in communities that are not already well serviced by PCI-capable hospitals.