Related Experiment Video
Updated: Mar 7, 2026
06:04
Ultrasonographic Assessment During Cardiopulmonary Resuscitation
Published on: October 24, 2020
7.7K
Timely bystander CPR improves outcomes despite longer EMS times.
Gwan Jin Park1, Kyoung Jun Song1, Sang Do Shin1
1Department of Emergency Medicine, Seoul National University College of Medicine and Hospital, Seoul, Republic of Korea.
The American Journal of Emergency Medicine
|February 27, 2017
Summary
Bystander CPR significantly improves survival and neurological outcomes for out-of-hospital cardiac arrest (OHCA) patients, especially when emergency response times are long. Early intervention is crucial for better patient survival rates.
Area of Science:
- Emergency Medicine
- Cardiology
- Public Health
Background:
- Out-of-hospital cardiac arrest (OHCA) survival rates are critically dependent on timely medical intervention.
- Bystander cardiopulmonary resuscitation (CPR) is a crucial link in the chain of survival for OHCA patients.
- The impact of bystander CPR on patient outcomes in relation to emergency medical services (EMS) response time requires further elucidation.
Purpose of the Study:
- To investigate the effect of bystander CPR on clinical outcomes in OHCA patients.
- To analyze the association between bystander CPR and varying EMS response times.
- To determine if bystander CPR mitigates the negative impact of delayed EMS response on survival and neurological function.
Main Methods:
- A population-based observational study of witnessed OHCA cases from 2012-2014.
- Categorization of EMS response times into four quartiles: <4 min, 4-<8 min, 8-<15 min, and 15-<30 min.
- Multivariable logistic regression analysis to assess the interaction between bystander CPR and EMS response time, with hospital discharge and good neurological outcome as primary and secondary endpoints.
Main Results:
- Out of 15,354 OHCA cases, 56.0% received bystander CPR.
- Survival to discharge was 10.6%, and favorable neurological outcome was 6.5%.
- Bystander CPR was associated with improved survival (AOR 0.52) and neurological outcomes (AOR 0.59) in the latest EMS response time group (15-<30 min).
Conclusions:
- OHCA survival decreases significantly with increasing ambulance response times.
- Bystander CPR plays a vital role in improving survival and neurological outcomes, particularly when EMS response is delayed.
- Early bystander CPR is essential for mitigating mortality and neurological deficits in OHCA patients.
Related Concept Videos
01:21Cardiopulmonary Resuscitation I: Adult
883
Cardiopulmonary resuscitation, or CPR, is a life-saving emergency procedure performed when a person's heart has stopped beating or they are no longer breathing. The foundation of CPR is Basic Life Support (BLS), which focuses on the early recognition of cardiac arrest, the immediate start of high-quality chest compressions, and the timely use of an automated external defibrillator (AED).Assessing Responsiveness and Checking the Carotid PulseWhen approaching an unresponsive person, first ensure...
883
01:23Cardiopulmonary Resuscitation III: AED Use
953
Introduction to AEDAn Automated External Defibrillator (AED) is a portable medical device that analyzes the heart's rhythm and, if necessary, delivers an electrical shock to help the heart re-establish an effective rhythm during sudden cardiac arrest (SCA). SCA occurs when the heart suddenly and unexpectedly stops beating, leading to a loss of blood flow to the brain and other vital organs. In such emergencies, time is of the essence, and using an AED, combined with Cardiopulmonary...
953
02:09Bystander Effect
10.4K
The discussion of bullying highlights the problem of witnesses not intervening to help a victim. This is a common occurrence, as the following well-publicized event demonstrates. In 1964, in Queens, New York, a 19-year-old woman named Kitty Genovese was attacked by a person with a knife near the back entrance to her apartment building and again in the hallway inside her apartment building. When the attack occurred, she screamed for help numerous times and eventually died from her stab wounds.
10.4K
01:25Cardiopulmonary Resuscitation IV: Pharmacological Management
1.1K
Pharmacologic intervention is crucial in treating cardiac arrest patients during ACLS or Advanced Cardiovascular Life Support. The ACLS algorithms guide the administration of specific drugs based on the patient's cardiac arrest rhythm, which includes pulseless ventricular tachycardia (VT), ventricular fibrillation (VF), asystole, and pulseless electrical activity (PEA).EpinephrineIndication: Epinephrine is the first-line drug for all cardiac arrest rhythms.Mechanism of Action: Epinephrine...
1.1K
01:22Cardiopulmonary Resuscitation II: ACLS Airway Management
845
Airway management is a key skill in emergency and critical care settings, as maintaining a clear airway is essential for adequate oxygenation and ventilation.Head Tilt-Chin Lift TechniqueThe head tilt-chin lift maneuver is an essential technique primarily used in patients without suspected cervical spine injuries. To perform this maneuver, one hand is placed on the patient’s forehead, and gentle pressure is applied backward to tilt the head. The fingertips of the other hand are positioned...
845
01:30Introduction Cardiac Emergencies
443
Cardiac emergencies are critical situations involving the heart that require immediate medical intervention to prevent severe complications or death. These emergencies often arise from underlying heart conditions that impair the heart's ability to function correctly.Types of Cardiac EmergenciesThe most common types of cardiac emergencies include Acute Coronary Syndrome (ACS), myocardial infarction (MI), cardiac arrest, and heart failure.Acute Coronary Syndrome (ACS)Acute Coronary Syndrome (ACS)...
443