What causes hemodynamic collapse in ventricular tachycardia (VT)?

Updated: Dec 05, 2017
  • Author: Steven J Compton, MD, FACC, FACP, FHRS; Chief Editor: Jeffrey N Rottman, MD  more...
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Answer

During VT, cardiac output is reduced as a consequence of decreased ventricular filling from the rapid heart rate and the lack of properly timed or coordinated atrial contraction. Ischemia and mitral insufficiency [18] may also contribute to decreased ventricular stroke output and hemodynamic intolerance.

Hemodynamic collapse is more likely when underlying left ventricular dysfunction is present or when heart rates are very rapid. Diminished cardiac output may result in diminished myocardial perfusion, worsening inotropic response, and degeneration to ventricular fibrillation (VF), resulting in sudden death.


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