A Risk Score To Predict Survival After Defibrillator Implantation. Results Of A Real-World Sample Of 2467 Patients In Ontario.  
  Risk Factors Select Values Here Risk Points  
  Age (yrs)    
  Heart Failure within 6 months before ICD?    
  Peripheral vascular disease?  
  Chronic pulmonary disease?  
  Renal disease?  
  Rheumatologic disease?  
  Microvascular complications of diabetes?  
  Metastatic or nonmetastatic cancer?  
  Total Number Of Patients In This Subset    
  1-Year Mortality (%)    
  2-Year Mortality (%)    
  Lee DS, Tu  JV, Austin PC, Dorian P, Yee R, Chong A, Alter DA, Laupacis A. Effect of cardiac and noncardiac conditions on survival after defibrillator implantation. J Am Coll Cardiol, 2007; 49:2408-2415.  
  Data Source: University of Toronto, other Ontario sites. Non-randomized. Period: 1997 - 2003.  
  Comment: This valuable study has several limitations. (1) Useful information such as medications  
  and indication for defibrillator implant (primary prevention vs secondary prevention) were not available.  
  However, 83% of patients had suffered cardiac arrest, VT or VF, suggesting secondary prevention.  
  (2) 62% of patients had no recent CHF or non-cardiac co-morbidities. The highest-risk subgroups  
  contained relatively small numbers of patients. Larger, more complete studies are needed. (3) At 2 years  
   post-implant, absolute survival advantage for ICD patients was about 2% versus matched controls. (Note: The Risk Score is designed so that only the first 2 non-cardiac morbidities selected contribute.)  
  Web calculator design and HTML transfer by Dr. John Coyle, 2007.  

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