Epidemiology of out-of-Hospital Cardiac Arrests, knowledge of cardiovascular disease and risk factors in a regional setting in India: The Warangal Area out-of-hospital Cardiac Arrest Registry (WACAR)

Effectiveness of chain of survival for out-of-hospital-cardiac-arrest (OHCA) in resource limited countries: A systematic review

Aim

Given the critical disparities in survival for out-of-hospital-cardiac-arrest (OHCA) in resource limited countries and the lack of context-specific evidence to guide resuscitation practices, we aimed to systematically evaluate the effectiveness of the chain of survival components including bystander response, emergency medical services (EMS) response, advanced life support, and post-resuscitation care on outcomes such as return of spontaneous circulation, survival to admission, survival to hospital discharge, and neurological outcomes in these settings.

Methods

This systematic review, following PRISMA guidelines, included observational and interventional studies on OHCA management from low, lower-middle, and upper-middle-income countries, published in English (2004-2023). PubMed, Embase, CINAHL, and Cochrane Library were searched using predefined terms. Two reviewers independently screened studies, extracted data using the Utstein template, and resolved conflicts with a third reviewer. Data included pre-hospital, patient, and post-resuscitation care factors, as well as short and long-term outcomes. Descriptive analysis and narrative synthesis were conducted, with return of spontaneous circulation (ROSC) rates compared across income groups using t-tests.

Results

Sixteen (16) eligible studies were included. No study was found from low-income countries. ROSC rates ranged from 0.7% to 44%, survival to discharge from 0.6% to 14.1%, and good neurological outcomes (CPC 1-2) from 0.6% to 53.8%. While upper-middle-income countries showed slightly higher ROSC rates, differences were not statistically significant. Risk of bias was moderate to high due to selection bias, inadequate confounding control, and inconsistent reporting. These findings emphasize the need for standardized reporting and further research to improve outcomes in resource limited countries.

Conclusion

This review highlights low survival rates for OHCA in resource limited countries, with significant variability and gaps in evidence. Strengthening EMS systems, adopting context-specific strategies, and standardizing reporting are critical to improving outcomes.

The role of blood nitric oxide level in predicting return of spontaneous circulation: a prospective case-control study

OBJECTIVE

The aim of this study was to investigate whether there is a difference in serum nitric oxide levels between patients who return spontaneously after cardiopulmonary resuscitation and those who do not. We also examined the potential of using serum nitric oxide levels as a marker to make an accurate decision about patient survival.

METHODS

We included 100 consecutive patients who were brought to the emergency clinic due to cardiac arrest. Blood samples were taken from these patients at admission, 30 min after admission, and when resuscitation was terminated.

RESULTS

We found that there was a significant difference in NO1 and NO3 values between the group of patients who did not return after cardiopulmonary resuscitation and the group in which spontaneous circulation returned. The NO1 value was significant in the receiver operating characteristic (ROC) analysis, while the NO3 value was not. A higher NO1 value provided a higher rate of survival.

CONCLUSION

Our findings suggest that nitric oxide may be a useful parameter to support the decision about patient survival. A higher NO1 value is associated with a better prognosis and survival rate. Therefore, serum nitric oxide levels may be a suitable indicator to support the decision-making process regarding patient survival.

Pilot Training Program on Hands-Only CPR and Choking First Aid for Frontline Police Responders in Rural Nepal

INTRODUCTION

Basic life support (BLS) is an emergency skill that includes performing appropriate cardiopulmonary resuscitation (CPR). Out-of-hospital cardiac arrest (OHCA) is a leading cause of mortality worldwide and is rising in Nepal. After an OHCA event, a bystander starting CPR quickly has been shown to increase the survival rate. While the Nepali police are generally the first responders to emergencies in rural parts, they are not trained in BLS. This program assesses a pilot training of hands-only CPR and choking first aid to the Nepal Police and Nepal Army participants in rural Nepal.

METHODS

A community-based nonprofit organization, HAPSA-Nepal, coordinated with local government to pilot this program. The program included pre- and post-tests, lectures, videos, and small group hands-on exercises; facilitators included faculty emergency physicians, residents, and medical officers. Structured pre- andp post-test questionnaires, confidence surveys, and skills checklists were conducted. Descriptive analysis examined the respondent's characteristics, and paired t-test was used to compare pretest and post-test scores.

RESULTS

A total of 126 participants received the training in this pilot phase. Prior to this training, 98.4% of the participants had not received any CPR training, and 100% of the participants had not received training on first aid for choking. The average pretest score was 4.4 with 95% CI ± 1.75, and the average post-test score was 8.06 with 95% CI ± 1.73 (out of a total of 11). All participants passed the skills assessment.

CONCLUSIONS

Locally adapted BLS training programs that included hands-only CPR and choking first aid showed a significant knowledge gain and skills competence among the frontline participants.

Comparison between a low-cost model (CPR Pillow) and a mannequin in training hands only cardiopulmonary resuscitation (CPR): A randomised trial

INTRODUCTION

CPR is an important lifesaving skill that can improve outcomes of patients in cardiac arrest. Mass training of hands-only CPR is one of the ways to spread information and teach this skill. Need for expensive CPR mannequins are a limiting factor in conducting such mass training programmes. This study assessed the effectiveness of a low-cost CPR pillow model in training hands-only CPR.

METHODOLOGY

Two hundred and six undergraduate students underwent a two-hour CPR training session. They were randomly divided into two groups - mannequin group and CPR pillow group and practiced hands-only CPR on a standard mannequin and a low-cost CPR pillow model, respectively. Knowledge, attitude, and skill acquisition were objectively assessed and compared between the two groups.

RESULTS

There was no statistical difference in hand positioning, chest compression rate and fraction, depth and overall CPR score between the two groups trained via mannequin and CPR Pillow (P > 0.05). The CPR pillow group had better percentage of chest recoil as compared to the mannequin group (86% vs 73%; P < 0.001).

CONCLUSION

The use of low-cost homemade CPR devices such as our CPR pillow model is an acceptable alternative to mannequin for training hands-only CPR to lay rescuers.

Outcomes of out of hospital sudden cardiac arrest in India: A review and proposed reforms

BACKGROUND

Bystander cardiopulmonary resuscitation (CPR) is the cornerstone in managing out-of-hospital cardiac arrest (OHCA). However, India lacks a formal sudden cardiac arrest (SCA) registry and the infrastructure for a robust emergency medical services (EMS) response system. Also, there exists an opportunity to improve widespread health literacy and awareness regarding SCA. Other confounding variables, including religious, societal, and cultural sentiments hindering timely intervention, need to be considered for better SCA outcomes.

OBJECTIVES

We highlight the current trends and practices of managing OHCA in India and lay the groundwork for improving the awareness, education, and infrastructure regarding the management of SCA.

CONCLUSION

Effective management of OHCA in India needs collaborative grassroots reformation. Establishing a large-scale SCA registry and creating official and societal guidelines will be pivotal for transforming OHCA patient outcomes.

Effectiveness of Cardiopulmonary Resuscitation at the Workplace

BACKGROUND

Out-of-Hospital Cardiac Arrest (OHCA) is a medical emergency whose chances of survival can be increased by rapid Cardiopulmonary Resuscitation (CPR) and early use of Public Access Defibrillators (PAD). Basic Life Support (BLS) training became mandatory in Italy to spread knowledge of resuscitation maneuvers in the workplace. Basic Life Support (BLS) training became mandatory according to the DL 81/2008 law. To improve the level of cardioprotection in the workplace, the national law DL 116/2021 increased the number of places required to be provided with PADs. The study highlights the possibility of a Return to spontaneous circulation in OHCA in the workplace.

METHODS

A multivariate logistic regression model was fitted to the data to extrapolate associations between ROSC and the dependent variables. The associations' robustness was evaluated through sensitivity analysis.

RESULTS

The chance to receive CPR (OR 2.3; 95% CI:1.8-2.9), PAD (OR 7.2; 95% CI:4.9 - 10.7), and achieve Return to spontaneous circulation (ROSC) (crude OR 2.2; 95% CI:1.7-3.0, adjusted OR 1.6; 95% CI:1.2-2.2) is higher in the workplace compared to all other places.

CONCLUSION

The workplace could be considered cardioprotective, although further research is necessary to understand the causes of missed CPRs and identify the best places to increase BLS and defibrillation training to help policymakers implement correct programming on the activation of PAD projects.

Abnormal ambient temperature change increases the risk of out-of-hospital cardiac arrest: A systematic review and meta-analysis of exposure types, risk, and vulnerable populations

BACKGROUND

There is growing evidence in support of a short-term association between ambient temperature and cardiac arrest attacks that is a serious manifestation of cardiovascular disease and has a high incidence and low survival rate. However, it remains unrecognized about the hazardous temperature exposure types, exposure risk magnitude, and vulnerable populations.

OBJECTIVES

We comprehensively summarize prior epidemiological studies looking at the short-term associations of out-of-hospital cardiac arrest (OHCA) with various temperature exposures among different populations.

METHODS

We searched PubMed and Web of Science databases from inception to October 2021 for eligible English language. Temperature exposure was categorized into three types: heat (included high temperature, extreme heat, and heatwave), cold (included low temperature and extreme cold), and temperature variation (included diurnal temperature range and temperature change between two adjacent days). Meta-analysis weighted by inverse variance was used to pool effect estimates.

RESULTS

This study included 15 studies from 8 countries, totaling around 1 million OHCA events. Extreme heat and extreme cold were significantly associated with an increased risk of OHCA, and the pooled relative risks (RRs) were 1.071 [95 % confidence interval (CI): 1.019-1.126] and 1.662 (95%CI: 1.138-2.427), respectively. The risk of OHCA was also elevated by heatwaves (RR = 1.248, 95%CI: 1.091-1.427) and more intensive heatwaves had a greater effect. Notably, the elderly and males seemed to be more vulnerable to the effects of heat and cold. However, we did not observe a significant association between temperature variation and the risk of OHCA (1.005, 95%CI: 0.999-1.012).

CONCLUSION

Short-term exposure to heat and cold may be novel risk factors for OHCA. Considering available studies in limited regions, the temperature effect on OHCA should be urgently confirmed in different regions.

Post-Cardiac Arrest: Mechanisms, Management, and Future Perspectives

Cardiac arrest is an important public health issue, with a survival rate of approximately 15 to 22%. A great proportion of these deaths occur after resuscitation due to post-cardiac arrest syndrome, which is characterized by the ischemia-reperfusion injury that affects the role body. Understanding physiopathology is mandatory to discover new treatment strategies and obtain better results. Besides improvements in cardiopulmonary resuscitation maneuvers, the great increase in survival rates observed in recent decades is due to new approaches to post-cardiac arrest care. In this review, we will discuss physiopathology, etiologies, and post-resuscitation care, emphasizing targeted temperature management, early coronary angiography, and rehabilitation.

Out of hospital cardiac arrest: experience of a bystander CPR training program in Karachi, Pakistan

Background

Nearly 90% of out-of-hospital cardiac arrest (OHCA) patients are witnessed, yet only 2.3% received bystander cardiopulmonary resuscitation (CPR) in Pakistan. This study aimed to determine retention of knowledge and skills of Hands-Only CPR among community participants in early recognition of OHCA and initiation of CPR in Karachi, Pakistan.

Methods

Pre and post-tests were conducted among CPR training participants from diverse non-health-related backgrounds from July 2018 to October 2019. Participants were tested for knowledge and skills of CPR before training (pre-test), immediately after training (post-test), and 6 months after training (re-test). All the participants received CPR training through video and scenario-based demonstration using manikins. Post-training CPR skills of the participants were assessed using a pre-defined performance checklist. The facilitator read out numerous case scenarios to the participants, such as drowning, poisoning, and road traffic injuries, etc., and then asked them to perform the critical steps of CPR identified in the scenario on manikins. The primary outcome was the mean difference in the knowledge score and skills of the participants related to the recognition of OHCA and initiation of CPR.

Results

The pre and post-tests were completed by 652 participants, whereas the retention test after 6 months was completed by 322 participants. The mean knowledge score related to the recognition of OHCA, and initiation of CPR improved significantly (p < 0.001) from pre-test [47.8/100, Standard Deviation (SD) ±13.4] to post-test (70.2/100, SD ±12.1). Mean CPR knowledge after 6 months (retention) reduced slightly from (70.2/100, ±12.1) to (66.5/100, ±10.8). CPR skill retention for various components (check for scene safety, check for response, check for breathing and correct placement of the heel of hands) deteriorated significantly (p < 0.001) from 77.9% in the post-test to 72.8% in re-test. Participants performed slightly better on achieving an adequate rate of chest compressions from 73.1% in post-test to 76.7% in re-test (p 0.27).

Conclusion

Community members with non-health backgrounds can learn and retain CPR skills, allowing them to be effective bystander CPR providers in OHCA situations. We recommend mass population training in Pakistan for CPR to increase survival from OHCA.