Essential Steps in PALS Cardiac Arrest Algorithm
Posted by Sydney Pulse, APRN at 7:01 am 0 Comment Print
When a child’s heart stops beating, every second counts. The PALS cardiac arrest algorithm provides a structured, evidence-based approach that can mean the difference between life and death. Understanding these essential steps empowers healthcare providers to respond swiftly and effectively during pediatric emergencies.
Understanding the Pediatric Chain of Survival
The Pediatric Chain of Survival forms the foundation of successful pediatric resuscitation. In 2025, the American Heart Association consolidated all cardiac arrest response protocols into a single six-link Chain of Survival, emphasizing the universal importance of high-quality compressions and rescue breaths for children and adults alike. This framework guides responders through critical actions that maximize survival chances.
The chain includes early recognition of cardiac arrest, immediate activation of emergency response, high-quality CPR, rapid defibrillation when indicated, effective advanced life support, and comprehensive post-cardiac arrest care. Each link connects to create a seamless continuum of care that significantly improves outcomes.
Initial Assessment and Recognition Within the Pediatric Chain of Survival
Recognition stands as the first critical step in the PALS cardiac arrest algorithm. A child in cardiac arrest appears unresponsive, exhibits no breathing or only gasping respirations, and shows no detectable pulse. Healthcare providers should check for a pulse at the carotid or femoral artery in children, while using the brachial artery for infants under one year of age.
Rapid identification of impending cardiac arrest can prevent full arrest from occurring. Respiratory failure represents the leading cause of pediatric cardiac arrest, making early intervention in respiratory distress essential. Children with respiratory distress may display increased work of breathing, abnormal breath sounds, or decreased oxygen saturation before progressing to complete arrest.
High-Quality CPR: The Foundation of Pediatric Survival
Delivering exceptional chest compressions forms the cornerstone of the PALS cardiac arrest algorithm. Quality compressions should be performed for at least 60% of the total resuscitation time, with continuous compressions except during specific interventions like defibrillation.
For children, compressions should reach one-third of the chest diameter—approximately 1.5 inches in infants and 2 inches in children. The compression rate should be maintained at 100-120 compressions per minute. For infants, rescuers should compress the sternum using either the heel of one hand or the two-thumb encircling hands technique, with pauses in chest compressions lasting less than 10 seconds.
Proper hand positioning ensures effective blood flow to vital organs. Place hands in the center of the chest, on the lower half of the sternum. Avoid compressing over the xiphoid process to prevent internal injuries.
Airway Management and Ventilation in the Pediatric Chain of Survival
Because respiratory failure triggers most pediatric arrests, airway management and effective ventilation represent fundamental components of pediatric resuscitation. Initial ventilation with a bag-mask device provides adequate oxygenation for most children during the early phases of resuscitation.
Deliver rescue breaths at a ratio of 30 compressions to 2 breaths for single rescuers, or 15 compressions to 2 breaths when two or more trained healthcare providers respond. Each breath should last approximately one second and produce a visible chest rise without excessive force that could cause gastric insufflation.
Consider advanced airway placement early in the resuscitation, as respiratory failure is the primary cause of most pediatric cardiac arrests. Once an advanced airway is established, provide continuous compressions without pauses for ventilation, delivering 10 breaths per minute.
Rhythm Assessment and Defibrillation
After initiating CPR and attaching monitoring equipment, assess the cardiac rhythm to determine the appropriate pathway. Pediatric cardiac arrest rhythms fall into two categories: shockable and non-shockable.
Shockable rhythms include ventricular fibrillation and pulseless ventricular tachycardia. When these rhythms appear, immediately deliver one shock followed by two minutes of CPR before reassessing the rhythm. Non-shockable rhythms include asystole and pulseless electrical activity, which require continuous CPR without defibrillation.
While ventricular fibrillation causes most adult cardiac arrests, children most commonly experience cardiac arrest secondary to respiratory failure or trauma, causing hypovolemia. This difference influences treatment priorities and expected rhythm presentations.
Medication Administration in PALS Cardiac Arrest
Vascular access and appropriate medication administration support the physiological restoration of circulation. Epinephrine stands as the primary medication, administered at 0.01 mg/kg of 1:10,000 concentration, which equals 0.1 mL/kg. Give epinephrine every 3-5 minutes during continued cardiac arrest.
Establish intravenous or intraosseous access quickly to facilitate medication delivery. After administering epinephrine, follow with a saline flush to ensure the medication reaches central circulation and can act on the heart.
For shockable rhythms that persist after the first shock and epinephrine dose, consider amiodarone (5 mg/kg IV/IO) or lidocaine (1 mg/kg IV/IO) as antiarrhythmic options. These medications help stabilize cardiac electrical activity and increase the likelihood of successful defibrillation.
Reversible Causes: The H’s and T’s
While performing high-quality CPR and following the algorithm, simultaneously search for and treat reversible causes of cardiac arrest. The mnemonic “H’s and T’s” helps rescuers remember potentially reversible conditions:
The H’s:
- Hypovolemia (fluid loss)
- Hypoxia (oxygen deficiency)
- Hydrogen ion excess (acidosis)
- Hypo/hyperkalemia (potassium imbalance)
- Hypothermia (low body temperature)
The T’s:
- Tension pneumothorax (collapsed lung)
- Tamponade (cardiac compression)
- Toxins (poisoning)
- Thrombosis (coronary or pulmonary)
Identifying and correcting these conditions while maintaining quality CPR significantly improves the chance of successful resuscitation.
Post-Cardiac Arrest Care: Sustaining the Pediatric Chain of Survival
Even after achieving return of spontaneous circulation (ROSC), patients remain at high risk for reentering cardiac arrest and require intensive monitoring and support. The post-arrest phase focuses on optimizing organ perfusion, preventing secondary injuries, and treating the underlying cause of arrest.
Maintain oxygen saturation between 94% and 99%, weaning supplemental oxygen if saturation reaches 100%. Keeping systolic blood pressure above the fifth percentile for age within six hours of achieving ROSC improves survival rates and neurological outcomes.
Temperature management plays a crucial role in neurological protection. Prevent fever aggressively, as post-arrest hyperthermia is associated with worse outcomes. Monitor for seizures continuously and treat promptly when they occur.
Evidence-Based Outcomes and Survival Data
Recent data demonstrates encouraging trends in pediatric cardiac arrest survival. Survival to hospital discharge improved significantly for in-hospital pediatric cardiac arrest, rising from 18.9% to 45.2% between 2000 and 2018. Overall survival rates after pediatric in-hospital cardiac arrest have increased from 19% to 38% for pulseless events over the past two decades.
However, substantial disparities remain between different arrest locations. Emergency department cardiac arrest shows a 19% survival rate compared to 40.4% for inpatient cardiac arrest. These differences highlight the importance of early recognition and immediate intervention before arrest occurs.
For out-of-hospital cardiac arrest, survival rates vary significantly by age: 7.4% for infants under one year, 14.1% for children aged 1-12 years, and 18.5% for adolescents aged 13-18 years. Early bystander CPR approximately doubles survival chances after out-of-hospital cardiac arrest.
Quality Improvement and Training
Research from the Children’s National Health System demonstrates that improving CPR quality throughout the algorithm significantly enhances patient outcomes. Focus on minimizing interruptions, maintaining proper compression depth and rate, allowing complete chest recoil between compressions, and avoiding excessive ventilation.
Regular training and simulation exercises help healthcare teams maintain proficiency in PALS algorithms. The 2025 guidelines emphasize the importance of team coordination, cognitive aids during resuscitation, and adherence to evidence-based protocols.
Implementing the PALS Algorithm in Clinical Practice
Successful implementation requires both individual competence and team coordination. Healthcare facilities should ensure adequate equipment availability, regular team training sessions, and quality improvement programs that track resuscitation metrics.
Cognitive aids such as algorithm cards, dose calculators, and structured communication tools improve performance during high-stress resuscitation events. Post-event debriefings allow teams to identify areas for improvement and reinforce effective practices.
Frequently Asked Questions
What is the most important factor in pediatric cardiac arrest survival?
High-quality CPR delivered immediately upon recognition stands as the single most important factor in survival. Compressions should achieve adequate depth (one-third of chest diameter), maintain proper rate (100-120 per minute), allow complete recoil, and minimize interruptions. Because most pediatric arrests result from respiratory failure rather than primary cardiac causes, both compressions and effective ventilation are essential for optimal outcomes.
How often should epinephrine be given during pediatric cardiac arrest?
Administer epinephrine every 3-5 minutes during ongoing cardiac arrest. The dose is 0.01 mg/kg of 1:10,000 concentration (equivalent to 0.1 mL/kg) given intravenously or intraosseously. Always follow each epinephrine dose with a saline flush to ensure the medication reaches central circulation. Research shows that shorter intervals between doses and fewer total doses are associated with improved survival outcomes.
What distinguishes pediatric cardiac arrest from adult cardiac arrest?
Pediatric cardiac arrest differs fundamentally in its causes and presentation. While adults typically arrest from primary cardiac events like ventricular fibrillation, children most commonly arrest secondary to respiratory failure, trauma, or shock. This means pediatric resuscitation must emphasize both compressions and rescue breaths rather than compression-only CPR. Additionally, children have higher metabolic rates and oxygen requirements, making rapid airway management and effective ventilation critical for successful outcomes.
Take Action: Prepare to Save Young Lives
Every healthcare provider who cares for children should maintain current PALS certification. The 2025 American Heart Association guidelines represent the most current, evidence-based approach to pediatric resuscitation. Regular training ensures you can respond confidently and effectively when faced with a pediatric emergency.
Ready to earn or renew your PALS certification? CPR Indianapolis offers comprehensive PALS classes in Indianapolis designed to build your confidence and competence in pediatric emergencies. As an American Heart Association training site, we provide hands-on, stress-free instruction in BLS for Healthcare Providers, ACLS, PALS, and CPR and First Aid courses.
Our expert instructors use simulation-based learning to ensure you master the PALS cardiac arrest algorithm and can apply it effectively in real-world situations. Whether you need initial certification or renewal, we make the process straightforward and focused on practical skills you’ll use to save lives.
Don’t wait until an emergency strikes. Contact CPR Indianapolis today to schedule your training. With convenient CPR certification in Indianapolis options and a proven track record of excellence, we’re your trusted partner in emergency cardiovascular care education. Visit our training center and join the thousands of healthcare providers who have enhanced their pediatric resuscitation skills with our programs.
