I'm not a doctor either (maybe someone who is can fill us in a bit better?) but I know that an ECG can but does not always pick up heart disease. The only definitive test involves invasive investigation of the coronary arteries, which itself carries risk to the patient/pilot and hence is not part of aircrew medicals. These issues were discussed more heavily in the AAIB report into the Staines Trident crash in 1972 (still available on AAIB website)
Last edited by KeyPilot; 13th Nov 2010 at 16:18.
Reason: Added that report still avbl on AAIB website