I am a 62-yr. old woman who was suffering from extreme fatigue as my primary complaint. I won't go into all the boring details, but it took some effort on my part to convince my doctors that I was concerned about my heart. I was given a nuclear stress test. My cardiologist said it showed no problems except that the bottom of my heart was beating slower than the top of my heart. He said he couldn't see it well on test results because of a shadow, but that if I wanted to look into it further that I should let him know. He did not sound concerned, so I was not going to push him any further. But another doctor I know strongly recommended that I follow up. So I did. The subsequent heart catherization showed three major blockages: 100%, 85%, and 70+%. It also showed that I had had a heart attack in the lower portion of my heart. I had triple bypass beating heart surgery in September; all went well, and I healed quickly. My question is: Why did my nuclear stress test show nothing wrong? Are false negatives common? Where can I get more information on this topic? Thank you for your help.