Pre-Hospital Factors Influencing Time of Arrival at Emergency Departments for Patients with Acute ST-Elevation Myocardial Infarction

Gender disparities in the mediating role of symptom knowledge level in reducing acute coronary syndrome (ACS) decision delay: Findings from a community-based study in China

BACKGROUND

Implementing training programs to educate patients on the prodromal symptoms of acute coronary syndrome (ACS) may assist patients in accurately recognizing these symptoms, and ultimately decrease their time delay in seeking emergency medical services (EMS). However, the effectiveness of this approach remains uncertain, particularly among the Chinese population.

METHODS

A cross-sectional study was conducted within 22 communities in Beijing, China between 2015 and 2018, with a total of 1099 participants recruited. The study utilized a standardized questionnaire to evaluate the presence of intentional decision delay in turning to EMS under a hypothetical chest pain, the participants' knowledge of ACS prodromal symptoms, and whether they had ever received any training programs aimed at increasing their symptom knowledge. Mediation analysis was performed with regression models and bootstrapping methods, and gender difference was further analyzed through moderated mediation analysis.

RESULTS

A total of 1099 participants (58.2% female, median [IQR] age 34 [20]) were included in the study. The results of the mediation analysis indicated that training programs were associated with a decrease risk in decision delay, with increased knowledge playing a mediating role (mediation effect/total effect = 36.59%, P < 0.0001). Gender modified this mediation effect, with it being observed only in the male group. Specifically, training programs were not found to significantly decrease decision delay among females (P > 0.05), even though they did improve women's knowledge of ACS prodromal symptoms (β = 0.57, P = 0.012).

CONCLUSION

The results suggested a relationship between prior training programs and reduced decision delay, with increased knowledge of prodromal symptoms of ACS serving as a mediator. However, the effect was only observed in male participants and not in female participants. This highlights the notion that mere transfer of knowledge regarding ACS prodromal symptoms may not be sufficient to mitigate decision delay in the female population. Further research is needed to corroborate these results and to gain deeper insights into the gender-specific barriers encountered in this study.

Time to thrombolysis and factors contributing to delays in patients presenting with ST-elevation myocardial infarction at Chris Hani Baragwanath Academic Hospital, Johannesburg, South Africa

BACKGROUND

Acute coronary syndrome is a public health burden both worldwide and in South Africa (SA). Guidelines recommend thrombolysis within 1 hour of symptom onset and 30 minutes of hospital arrival for patients with ST-elevation myocardial infarction (STEMI) in order to prevent morbidity and mortality. There is a paucity of data pertaining to the time between onset of chest pain and thrombolysis in STEMI patients in SA.

OBJECTIVES

To elucidate the time to thrombolytic therapy, establish the reasons for treatment delays, and calculate the loss of benefit of thrombolysis associated with delays in treatment of patients presenting with STEMI at Chris Hani Baragwanath Academic Hospital (CHBAH), Johannesburg, SA.

METHOD

A prospective observational study of 100 consecutive patients with STEMI was conducted at CHBAH (2021 - 2022).

RESULTS

The mean (standard deviation) age was 55.6 (11.6) years, with a male predominance (78%). Thrombolytic therapy was administered to 51 patients, with a median (interquartile range (IQR)) time to thrombolysis of 360 (258 - 768) minutes; 10 of the patients who received a thrombolytic (19.6%) did so within 30 minutes of arrival at the hospital. The median (IQR) time from symptom onset to calling for help was 60 (30 - 240) minutes, the median time from arrival of help to hospital arrival was 114 (48 - 468) minutes, and the median in-hospital delay to thrombolysis after arrival was 105 (45 - 240) minutes. Numerous reasons that led to delay in treatment were identified, but the most frequent was prehospital delays related to patient factors. Late presentation resulted in 26/49 patients (53.1%) not receiving thrombolytic therapy. Five patients died and 43 suffered from heart failure. Thirty per 1 000 participants could have been saved had they received thrombolytic therapy within 1 hour from the onset of chest pain.

CONCLUSION

Prehospital and hospital-related factors played a significant role in delays to thrombolysis that led to increased morbidity and mortality of patients with STEMI.

Knowledge, attitudes and beliefs about acute coronary syndrome among patients diagnosed with acute coronary syndrome, Addis Ababa, Ethiopia

Background

Acute coronary syndrome (ACS) morbidity and mortality are rising in low- and middle-income countries, including Ethiopia. The shift in health-care resources from communicable diseases to chronic conditions has created formidable health-care challenges.

Objective

The objective of this study was to examine the knowledge, attitudes and beliefs among ACS patients.

Methods

A cross-sectional design was used to enroll participants admitted to one of 3 emergency units in Addis Ababa, Ethiopia. Knowledge, attitudes and beliefs about ACS was measured using modified ACS response index questionaries.

Results

Participant’s (N = 330) mean age was 57.9 ± 14.1, majority male (n = 219, 66.36%). Half of the study participants have inadequate Knowledge (n = 147, 44.6%), unfavorable attitudes (n = 152, 46%), and belief (n = 153, 46.4%) about ACS symptoms even after being diagnosed and treated in the emergency unit. The most frequently recognized ACS symptoms were chest discomfort (n = 274, 83%), fatigue (n = 267, 80.9%) and chest pain (n = 266, 80.6%) while Jaw pain (n = 101, 30%) neck pain (n = 146,44.2%), were less often recognized. Nearly two thirds of the participants (n = 214, 65%) would not prefer to use emergency medical services (EMS) to come to the hospital. Factors associated with adequate knowledge were age < 45 (AOR = 2.16, CI (1.1–4.0) p = 0.014), and female sex (AOR = 2.7, CI (1.5–4.4) p = 0.001) and diabetics (AOR = 1.9, (1.18–3.0) p = 0.008). Meanwhile, lack of formal education (AOR = 6.7, CI (3.1–14) p < 0.001) and unemployment (AOR = 2.0, CI (1.1–3.8) p = 0.021) were associated with unfavorable attitude. In addition, lack of social support (AOR = 1.9, (1.17–3.0) p = 0.009) and unfavorable attitude (AOR = 2.1, CI (1.3–3.4) p = 0.001) were significantly associated with unfavorable belief.

Conclusion

Despite receiving treatment for ACS in an emergency unit, roughly half of participants did not have adequate knowledge, favorable attitude and belief towards ACS. This elucidates there is significant communication gap between the health care providers and patients. The study findings stipulate there is a need to provide health awareness campaigns using different media outlet with special attention to the uneducated and unemployed groups. Furthermore, most participants were less likely to utilize emergency medical service, which should be further investigated and addressed.

Number of standard modifiable risk factors and mortality in patients with first-presentation ST-segment elevation myocardial infarction: insights from China Acute Myocardial Infarction registry

BACKGROUND

Recent publications reported a paradoxical finding that there was an inverse association between the number of standard modifiable risk factors (SMuRFs; smoking, hypertension, diabetes, and hyperlipidemia) and mortality in patients with myocardial infarction. However, the current evidence is only limited to those highly developed countries with advanced medical management systems.

METHODS

The China Acute Myocardial Infarction registry is a prospective observational study including patients with acute myocardial infarction from three-level hospitals across 31 administrative regions throughout mainland China. A total of 16,228 patients with first-presentation ST-elevation myocardial infarction (STEMI) admitted to hospitals from January 2013 to September 2014 were enrolled in the current analysis. Cox proportional hazard models adjusting for baseline characteristics, clinical profiles at presentation, and in-hospital treatments were used to assess the association of the number of SMuRFs with all-cause mortality at 30 days after STEMI presentation.

RESULTS

A total of 1918 (11.8%), 11,503 (70.9%), and 2807 (17.3%) patients had 0, 1-2, and 3-4 SMuRFs at presentation, respectively. Patients with fewer SMuRFs were older and more likely to be females, experienced longer pre-hospital delays, and were less likely to receive primary percutaneous coronary intervention and evidence-based medications. Compared with those without any SMuRF, patients with 1-2 SMuRFs and 3-4 SMuRFs were associated with an HR of 0.74 (95% CI, 0.63-0.87) and 0.63 (0.51-0.77) for all-cause mortality up to 30 days in the unadjusted model (P_trend < 0.0001). However, after multivariate adjustment, the number of SMuRFs was positively associated with increased mortality risk (HR for 1-2 SMuRFs, 1.15 [0.95-1.39]; HR for 3-4 SMuRFs, 1.31 [1.02-1.68]; P_trend = 0.03), and the association was only significant among patients admitted to hospitals beyond 12 h from onset (HR for 1-2 SMuRFs, 1.39 [1.03-1.87]; HR for 3-4 SMuRFs, 2.06 [1.41-3.01]) but not their counterparts (P_interaction = 0.01).

CONCLUSIONS

The increased crude mortality risk among patients without SMuRFs is explained by confounding factors related to their poor risk profiles (old age, longer pre-hospital delays, and poor clinical management). After multivariate adjustment, a higher risk-factor burden was associated with poor prognosis among patients with STEMI.

Study of outcomes of delay in referral of patients with acute myocardial infarction

BACKGROUND

Delay in seeking medical help in patients with acute myocardial infarction (AMI) challenges the patients in terms of diagnosis and treatment. This study aimed to evaluate the outcomes of delay referral (≥12 h) in patients with AMI.

MATERIALS AND METHODS

In this retrospective cohort study, the medical records of 252 patients with AMI (2017-2019) admitted to Shahid Beheshti Hospital, Qom, Iran, was reviewed. Data collection tool was a researcher-made data sheet that included demographic characteristics, times, hospitalization costs, risk factors, history of heart disease, results of paraclinical tests, clinical information at the time of admission, and outcomes of delayed referral. Data were analyzed using t-test, Chi-square, Kaplan-Meier estimator, log-rank test, Cox regression by STATA, and SPSS (version 25).

RESULTS

The levels of troponin, creatine phosphokinase, lactate dehydrogenase were significantly higher in the delayed referral group (P < 0.05). After treatment, the cardiac ejection fraction was significantly different in the nondelayed referral (41.56 ± 9.16) and the delayed referral group (38.39 ± 11.01) (P < 0.001). There was no significant difference in the percentage of hospital deaths in the groups (P = 0.078).

CONCLUSION

Delayed referral of patients with AMI is associated with decreased physiological cardiac function, which complicates recovery for these patients.

Correlates of Delayed Initial Contact to Emergency Services among Patients with Suspected ST-Elevation Myocardial Infarction

Background

Early diagnosis and treatment of a patient displaying symptoms of myocardial ischemia is paramount in preventing detrimental tissue damage, arrhythmias, and death. Patient-related hospital delay is the greatest considerable cause of total delay in treatment for acute myocardial infarction.

Objective

To identify patient characteristics contributing to prehospital delay and ultimately developing health interventions to prevent future delay and improve health outcomes.

Methods

A retrospective chart review of 287 patients diagnosed with ST-elevation myocardial infarction (STEMI) was evaluated to examine correlates of patient-related delays to care.

Results

Stepwise logistic regression modeling with forward selection (likelihood ratio) was performed to identify predictors of first medical contact (FMC) within 120 minutes of symptom onset and door-to-balloon (DTB) time within 90 minutes. Distance from the hospital, being unmarried, self-medicating, disability, and hemodynamic stability emerged as variables that were found to be predictive of FMC within the first 120 minutes after symptom onset. Similarly, patient characteristics of gender and disability and having an initial nondiagnostic electrocardiogram emerged as significant predictors of DTB within 90 minutes.

Conclusions

Individual attention to high-risk patients and public education campaigns using printed materials, public lectures, and entertainment mediums are likely needed to disseminate information to improve prevention strategies. Future research should focus on identifying the strengths of prehospital predictors and finding other variables that can be established as forecasters of delay. Interventions to enhance survival in acute STEMI should continue as to provide substantial advances in overall health outcomes.

Acute coronary syndrome treatment delay in low to middle-income countries: A systematic review

Although morbidity and mortality rates are declining for acute coronary syndrome (ACS) in most high-income countries, it is rising at an alarming pace for low to middle income countries (LMICs). A major factor that is contributing to the poor clinical outcomes among LMICs is largely due to prehospital treatment delays. This systematic review was conducted to determine the mean length of time from symptom onset to treatment in LMICs and the sociodemographic, clinical and health system characteristics that contribute to treatment delays. We conducted a comprehensive review of the relevant literature published in English between January 1990 through May 2020 using predefined inclusion and exclusion criteria. Twenty-nine studies were included and time to treatment was defined from ACS symptom onset to first medical contact and dichotomized further as less than or >12-hours. The mean time from symptom onset to first medical contact was 12.7 h which ranged from 10-minutes to 96 h. There was consensus among studies that being older, female, illiterate, living in a rural area, and financially limited was associated with longer treatment delays. Lack of a developed emergency transportation system, poor communication and organization between community facilities and interventional facilities were also cited as major contributors for ACS treatment delays. Findings from this systematic review provide future directions to potentially reduce prehospital delays in LMICs and improve ACS outcomes.

Pre-hospital delay among patients with acute myocardial infarction in Saudi Arabia. A cross-sectional study

OBJECTIVES

To estimate the pre-hospital delay time among patients diagnosed with acute myocardial infarction and to determine factors associated with pre-hospital delay.

METHODS

A cross-sectional study was conducted among 200 patients with myocardial infarction at Madinah Cardiac Center, Al Madinah Al Munawarah, Saudi Arabia between November 2019 and March 2020. Data were collected by direct physician-subject interviews. We used the validated version of the modified response to symptoms questionnaire. Chi-square test, t test, and multivariate analysis were used to examine factors associated with pre-hospital delay.

RESULTS

The median pre-hospital delay time was 3.7 hours. Among all the patients, 126 patients (63%) arrived at the hospital later than 2 hours from the onset of symptoms. Factors that were significantly associated with pre-hospital delay included a previous information on acute coronary syndrome (adjusted odds ratio [adj OR]=0.35, 95% confidence interval [CI] 0.1-0.6), history of hypercholesteremia (adj OR=2.3, 95% CI 1.1-4.7), arrived by ambulance (adj OR=0.3, 95% CI 0.1-0.8), and increased pain intensity (adj OR=0.7, 95% CI 0.6-0.9).

CONCLUSION

Approximately two-thirds of the patients arrived later than 2 hours from the onset of symptoms. A previous information about acute coronary syndrome, history of hypercholesteremia, arrived by ambulance, and increased pain intensity were associated with pre-hospital delay. The study recognizes the need for educational programs about acute myocardial infarction symptoms and the bene ts of availing an ambulance service.