Praxis Medical Insights

Est. 2024 • Clinical Guidelines Distilled

Made possible by volunteer editors from the University of Calgary & University of Alberta

Last Updated: 8/22/2025

Cardiac Arrest Management Strategies

High-Quality CPR

  • The American Heart Association recommends compressing the chest to a depth of 5 cm and at a rate of 100-120/min, allowing for complete chest recoil 1
  • Minimizing interruptions in compressions is crucial for effective CPR 1
  • The compressor should be switched every 2 minutes to avoid fatigue 1
  • For patients without advanced airway management, a compression-to-ventilation ratio of 30:2 is recommended 1
  • With advanced airway management, 10 breaths/min with continuous compressions is advised 2

Defibrillation

  • For pulseless ventricular fibrillation or tachycardia, defibrillation should be performed as quickly as possible 1
  • The energy level for biphasic defibrillators should be set according to the manufacturer's recommendation (usually 120-200J), or the maximum available if unknown 1
  • For monophasic defibrillators, 360J is recommended 1
  • CPR should be resumed immediately after the shock, without checking for a pulse 1

Advanced Airway Management

  • Supraglottic airway devices or endotracheal intubation can be used 3
  • Continuous capnography should be used to confirm tube placement 2
  • Excessive ventilation (more than 8-10 breaths/min) should be avoided 1

Reversible Causes

  • Hypovolemia, hypoxia, hydrogen ions (acidosis), hypo/hyperkalemia, and hypothermia are potential reversible causes of cardiac arrest 1
  • Tension pneumothorax, cardiac tamponade, toxins, pulmonary embolism, and coronary thrombosis are also potential reversible causes 1

Post-Cardiac Arrest Care

  • A structured and multidisciplinary system of post-cardiac arrest care should be implemented 4
  • Cardiopulmonary function and perfusion of vital organs should be optimized 4
  • Patients should be transported to a hospital with percutaneous coronary intervention capability 4
  • Temperature control is crucial for optimizing neurological recovery 4
  • Monitoring and prevention of multiple organ dysfunction are essential 4

ECPR (Extracorporeal Cardiopulmonary Resuscitation)

  • ECPR should be considered for patients with potentially reversible causes of cardiac arrest 5
  • It should be implemented in centers with experience and adequate resources 5
  • ECMO flow should be maintained at 3-4 L/min after cannulation 5
  • Mixed venous oxygen saturation (SvO2) should be monitored, with a target above 66% 5

Acute Coronary Syndrome

  • Pre-hospital 12-lead ECG should be performed when available 4
  • Early notification of the receiving hospital for activation of the intervention team is crucial 4
  • An integrated system of care for acute coronary syndrome should be implemented, involving the community, emergency services, and hospital 4

STEMI (ST-Elevation Myocardial Infarction) Treatment

  • Patients should be transported to a hospital with percutaneous coronary intervention capability 4
  • Early reperfusion is crucial, and time is muscle 6
  • For patients ineligible for standard IV fibrinolytic therapy, intra-arterial fibrinolysis or mechanical revascularization should be considered in selected centers 6

Post-ACS Care

  • Patients should be monitored for cardiac complications and multiple organ dysfunction 4
  • Secondary prevention therapies should be initiated as indicated 4
  • Left ventricular function should be assessed before discharge 4

Chronic Coronary Syndrome

  • A comprehensive clinical evaluation with risk stratification should be performed 4
  • Non-invasive tests should be used to evaluate ischemia and cardiac function 4
  • Coronary angiography should be considered in selected patients 4

Treatment

  • Lifestyle modifications and risk factor control should be implemented 4
  • Medication therapy should be optimized for symptom relief and prevention of events 4
  • Revascularization should be considered in patients with refractory symptoms or high-risk anatomy 4

Hypothermia in Cardiac Arrest

  • For hypothermic patients without signs of life, CPR should be initiated without delay 7
  • For ventricular fibrillation or tachycardia in hypothermic patients, defibrillation should be attempted 7
  • If ventricular fibrillation or tachycardia persists after a single shock, additional defibrillation attempts should be made according to the standard ACLS algorithm, concurrent with rewarming strategies 7
  • After return of spontaneous circulation, rewarming should be continued until a target temperature of approximately 32° to 34°C is reached 7

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