New to this forum and just saw your posting. HTN: If poor control of Stage I or II, get records from PCP and screen for target organ disease. If poor control of Stage III or IV (>180/110), defer clearance and refer back to PCP for further evaluation. S/p MI: Not disqualifying if pt is stable and can tolerate required physical activity. Get records including last EST. Asthma/COPD: Clear if stable, consider spirometry to document degree of function. We do spirometry for most of our client companies. A good source of info is "Guide to the Medical Evaluation for Respiratory Use" available through OEM Press.