Emergency Medicine Book

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Reversible Causes of Cardiopulmonary Arrest

Aka: Reversible Causes of Cardiopulmonary Arrest, 5H5T, 6H6T
  1. Conditions
    1. Cardiopulmonary Arrest
    2. Arrhythmia
    3. Pulseless Electrical Activity
    4. Ventricular Tachycardia
    5. Ventricular Fibrillation
    6. Supreventricular Tachycardia
  2. Background
    1. Mnemonic: 6H 6T
  3. Causes: Six H's
    1. Hypovolemia
    2. Hypoxia
    3. Hydrogen Ion (Metabolic Acidosis)
    4. Hyperkalemia
    5. Hypokalemia
    6. Hypothermia
  4. Causes: Six T's
    1. Tablets or Toxins (Unknown Ingestion)
      1. Tricyclic Antidepressant Overdose
      2. Digitalis Toxicity
      3. Beta Blocker Overdose
      4. Calcium Channel Blocker Overdose
    2. Tamponade (Cardiac Tamponade)
    3. Tension Pneumothorax
    4. Thrombosis: Myocardial Infarction
    5. Thrombosis: Pulmonary Embolism
    6. Trauma
  5. Causes: Other
    1. Subarachnoid Hemorrhage (5% of Cardiac Arrests)
      1. Cardiac Arrest triggered by Catecholamine surge, Macrophage infiltration into left ventricle
  6. Management: Empiric Therapies
    1. Six empiric therapies to consider in Cardiac Arrest
    2. Mnemonic: "Never Carry Bling Through Gloomy Antwerp"
      1. Needle
        1. Emergency Pericardiocentesis (Cardiac Tamponade)
        2. Needle Thoracostomy (Tension Pneumothorax)
      2. Calcium
        1. Calcium Chloride stabilize Myocardium (Hyperkalemia)
      3. Blood (or fluid Resuscitation)
        1. NS or LR bolus (Hypovolemic shock)
      4. Thrombolytics
        1. Massive Pulmonary Embolism
      5. Glucose
        1. Hypoglycemia
      6. Antidote
        1. Toxin Antidote
    3. References
      1. Strayer in Herbert (2015) EM:Rap 15(8): 4-5
  7. References: Cardiopulmonary Resuscitation Guidelines
    1. http://www.circulationaha.org
    2. (2010) Guidelines for CPR and ECC [PubMed]
    3. (2005) Circulation 112(Suppl 112):IV [PubMed]
    4. (2000) Circulation, 102(Suppl I):86-9 [PubMed]

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