Prognosis

• Untreated patients

  • 5 year death rate is 50%
  • Class I: <5% annual risk of death
  • Class II: 5-10% annual risk of death
  • Class III: 10-20% annual risk of death
  • Class IV: 20-50% annual risk of death

• Treated patients (ACE inhibitors)

  • Class I and II: 8% improvement in life span
  • Class II and III: 16% improvement
  • Class IV: 27% improvement

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