Q:

A 68-year-old man suffers sudden cardiac death (SCD) but is resuscitated and brought to the hospital for evaluation and treatment. The following is/are true:

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A 68-year-old man suffers sudden cardiac death (SCD) but is resuscitated and brought to the hospital for evaluation and treatment. The following is/are true:


  1. The most likely cause of SCD is ventricular arrhythmia
  2. There is 30–40% chance of recurrent SCD in one year
  3. Empiric antiarrhythmic drug therapy improves survival
  4. An inducible ventricular tachyarrhythmia at EP study carries a favorable prognosis
  5. If a ventricular aneurysm is found with arrhythmia, aneurysm resection is adequate treatment

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a. The most likely cause of SCD is ventricular arrhythmia

b. There is 30–40% chance of recurrent SCD in one year

Ventricular arrhythmias cause 75% of SCD, while 25% are due to acute MI. There is a 30–40% chance of recurrent SCD in one year. An inducible ventricular tachyarrhythmia carries a poor prognosis with < 50% five year survival from SCD unless it can be abolished. Empiric antiarrhythmic drug therapy does not improve survival. Aneurysmectomy alone is not adequate therapy for arrhythmias associated with aneurysms since the arrhythmia usually originates in adjacent mechanically stressed myocardium.

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