Time to Treatment and In-Hospital Major Adverse Cardiac Events Among Patients With ST-Segment Elevation Myocardial Infarction Who Underwent Primary Percutaneous Coronary Intervention (PCI) According to the 24/7 Primary PCI Service Registry in Iran: Protocol for a Cross-Sectional Study

Door-to-Balloon Time and Mortality Among Patients Undergoing Primary PCI, Challenges and Experience from Somalia's Largest PCI Center

Introduction

The door-to-balloon time, the time between a patient's arrival at the hospital and percutaneous coronary intervention, is crucial for managing myocardial infarction. Aiming for less than 90 minutes is recommended, as shortened times are associated with improved outcomes. However, limited healthcare resources, infrastructure, transportation and poverty impact management, leading to poorer outcomes and delayed door to balloon time. Addressing these challenges and their causes is essential for optimal care.

Methodology

A retrospective analysis of 103 patients' medical history records from May 2022 to June 2023 at the Mogadishu Somali Turkish Training and Research Hospital in Somalia was conducted. The data was mainly collected from the hospital's electronic medical records system, analyzing patient demographics, clinical characteristics, and angiographical records. The study analyzed variables responsible for door-to-balloon (D2B) time delay, patient angiography results, cause of delay, procedure length, etc.

Results

A study of 103 patients who had angiography performed between May 2022 and July 2023 was done. The predominant gender in the study was 73% male, with a mean age of 58 years. The most common risk factors were hypertension (33%), smoking (38%), and diabetes (39%). Of all the vessels, the Left Anterior Descending (LAD) was the most commonly obstructed (63%). Time delays from door-to-balloon were frequent, median door-to-balloon time was 169 minutes, frequently brought on by social problems and financial limitations. The majority (77.4%) of the patients had only percutaneous angiography (PCI), while 22.6% were recommended for bypass following PCI of the infarct-related artery (IRA). Complications in the delayed treatment group were the main cause of the death rate of 24.2%.

Conclusion

Door-to-balloon time is crucial for acute myocardial infarction treatment which is challenging in impoverished countries like Somalia. Investments in healthcare infrastructure, public health education, and emergency services can improve patient outcomes.

Myocardial Infarction in Iran: Epidemiology, Management, and Prognosis

Background

Cardiovascular diseases, specifically acute myocardial infarction (AMI), are the leading cause of death worldwide. In this review, we explain the characteristics of AMI in Iran.

Methods

We searched PubMed, Google, and Google Scholar for articles containing myocardial infarction, STEMI, and MI+ Iran in English and Persian words.

Results

The age-standardized incidence rate of MI was 73.3 per 100 000. The mean±SD age of patients was 61.20±13.40 years. In-hospital mortality of patients with AMI in the IMIR was 12.1%. Concerning AMI complications reported in the IMIR, 5.8% of patients experienced ventricular tachycardia, and 2.5% experienced ventricular fibrillation. The 1-year mortality rate in the IPACE2 study was 4.3%.

Conclusion

Only a few national studies are available in Iran regarding patients with AMI. A federal surveillance program continuously monitoring and tracking coronary events is essential to improve the general population's health.

Time to Treatment and In-Hospital Major Adverse Cardiac Events Among Patients With ST-Segment Elevation Myocardial Infarction Who Underwent Primary Percutaneous Coronary Intervention (PCI) According to the 24/7 Primary PCI Service Registry in Iran: Cross-Sectional Study

Background

Performing primary percutaneous coronary intervention (PCI) as a preferred reperfusion strategy for patients with ST-segment elevation myocardial infarction (STEMI) may be associated with major adverse cardiocerebrovascular events (MACCEs). Thus, timely primary PCI has been emphasized in order to improve outcomes. Despite guideline recommendations on trying to reduce the door-to-balloon time to <90 minutes in order to reduce mortality, less attention has been paid to other components of time to treatment, such as the symptom-to-balloon time, as an indicator of the total ischemic time, which includes the symptom-to-door time and door-to-balloon time, in terms of clinical outcomes of patients with STEMI undergoing primary PCI.

Objective

We aimed to determine the association between each component of time to treatment (ie, symptom-to-door time, door-to-balloon time, and symptom-to-balloon time) and in-hospital MACCEs among patients with STEMI who underwent primary PCI.

Methods

In this observational study, according to a prospective primary PCI 24/7 service registry, adult patients with STEMI who underwent primary PCI in one of six catheterization laboratories of Tehran Heart Center from November 2015 to August 2019, were studied. The primary outcome was in-hospital MACCEs, which was a composite index consisting of cardiac death, revascularization (ie, target vessel revascularization/target lesion revascularization), myocardial infarction, and stroke. It was compared at different levels of time to treatment (ie, symptom-to-door and door-to-balloon time <90 and ≥90 minutes, and symptom-to-balloon time <180 and ≥180 minutes). Data were analyzed using SPSS software version 24 (IBM Corp), with descriptive statistics, such as frequency, percentage, mean, and standard deviation, and statistical tests, such as chi-square test, t test, and univariate and multivariate logistic regression analyses, and with a significance level of <.05 and 95% CIs for odds ratios (ORs).

Results

Data from 2823 out of 3204 patients were analyzed (mean age of 59.6 years, SD 11.6 years; 79.5% male [n=2243]; completion rate: 88.1%). Low proportions of symptom-to-door time ≤90 minutes and symptom-to-balloon time ≤180 minutes were observed among the study patients (579/2823, 20.5% and 691/2823, 24.5%, respectively). Overall, 2.4% (69/2823) of the patients experienced in-hospital MACCEs, and cardiac death (45/2823, 1.6%) was the most common cardiac outcome. In the univariate analysis, the symptom-to-balloon time predicted in-hospital MACCEs (OR 2.2, 95% CI 1.1-4.4; P=.03), while the symptom-to-door time (OR 1.4, 95% CI 0.7-2.6; P=.34) and door-to-balloon time (OR 1.1, 95% CI 0.6-1.8, P=.77) were not associated with in-hospital MACCEs. In the multivariate analysis, only symptom-to-balloon time ≥180 minutes was associated with in-hospital MACCEs and was a predictor of in-hospital MACCEs (OR 2.3, 95% CI 1.1-5.2; P=.04).

Conclusions

A longer symptom-to-balloon time was the only component associated with higher in-hospital MACCEs in the present study. Efforts should be made to shorten the symptom-to-balloon time in order to improve in-hospital MACCEs.

International Registered Report Identifier (IRRID)

RR2-10.2196/13161