WHAT IS SHOCK?

SHOCK
Shock. Representative electrograms of the episodes obtained upon device interrogation. (A) Appropriate ICD shock due to VF, (B) inappropriate ICD shock due to atrial fibrillation with rapid ventricular response. ICD: implantable cardioverter-defibrillator, VF: ventricular fibrillation, AMP: amplitude, HV: high voltage shock, AS: atrial sensing, STIM: stimulation (antitachycardia pacing). Tachyarrhythmia Cycle Length in Appropriate versus Inappropriate Defibrillator Shocks in Brugada Syndrome, Early Repolarization Syndrome, or Idiopathic Ventricular Fibrillation. Lee WS, Kim J, Kwon CH, Choi JH, Jo U, Kim YR, Nam GB, Choi KJ, Kim YH - Korean circulation journal (2016). Not Altered. CC.

Shock is a life-threatening manifestation of circulatory failure.

Types of shock include:

  • Hypovolemic shock
  • Septic shock 
  • Cardiogenic shock
  • Neurogenic shock
Type of ShockClinical ExamplesPrincipal Pathogenic Mechanisms
CardiogenicMyocardial infarction, Rupture of the Ventricular Wall, Arrythmia, Pulmonary Embolism, Cardiac TamponadeFailure of myocardial pump
HypovolemicBlood Loss, Burns, Diarrhea, VomitingInadequate blood or plasma volume
SepticInfectionsPeripheral vasodilation
NeurogenicSpinal Cord Injury or CompressionLoss of vascular tone
Shock.