pubmed 12085856 http://symptomresearch.nih.gov/chapter_1/index.htm online tutorials/courses New England Research Institutes Inc. NERI 3291 http://www.symptomresearch.com http://www.nlm.nih.gov/medlineplus/coronaryarterybypasssurgery.html http://www.ncbi.nlm.nih.gov/entrez/query/egifs/http:--www.nlm.nih.gov-medlineplus-images-linkout_sm.gif Coronary Artery Bypass Surgery consumer health MedlinePlus Health Information MEDPLUS 3162 http://medlineplus.gov/ http://www.nlm.nih.gov/medlineplus/images/linkout_sm.gif 12085853 http://www.nlm.nih.gov/medlineplus/arrhythmia.html http://www.ncbi.nlm.nih.gov/entrez/query/egifs/http:--www.nlm.nih.gov-medlineplus-images-linkout_sm.gif Arrhythmia consumer health MedlinePlus Health Information MEDPLUS 3162 http://medlineplus.gov/ http://www.nlm.nih.gov/medlineplus/images/linkout_sm.gif http://www.nlm.nih.gov/medlineplus/exerciseandphysicalfitness.html http://www.ncbi.nlm.nih.gov/entrez/query/egifs/http:--www.nlm.nih.gov-medlineplus-images-linkout_sm.gif Exercise and Physical Fitness consumer health MedlinePlus Health Information MEDPLUS 3162 http://medlineplus.gov/ http://www.nlm.nih.gov/medlineplus/images/linkout_sm.gif http://www.nlm.nih.gov/medlineplus/exerciseforchildren.html http://www.ncbi.nlm.nih.gov/entrez/query/egifs/http:--www.nlm.nih.gov-medlineplus-images-linkout_sm.gif Exercise for Children consumer health MedlinePlus Health Information MEDPLUS 3162 http://medlineplus.gov/ http://www.nlm.nih.gov/medlineplus/images/linkout_sm.gif http://www.nlm.nih.gov/medlineplus/pacemakersandimplantabledefibrillators.html http://www.ncbi.nlm.nih.gov/entrez/query/egifs/http:--www.nlm.nih.gov-medlineplus-images-linkout_sm.gif Pacemakers and Implantable Defibrillators consumer health MedlinePlus Health Information MEDPLUS 3162 http://medlineplus.gov/ http://www.nlm.nih.gov/medlineplus/images/linkout_sm.gif