Last time I had a treadmill stress test they stopped me at about 6 minutes, put me in an ambulance and sent me to the cardiac care unit at the VA in San Antonio. Seems my heart has a bit of extra "wiring", a syndrome called WPW, which looked exactly like I was having a heart attack to my doctor who was conducting the test at the VA here in Kerrville. After two days in cardiac care they finally let me go home. That was a couple of years ago. I had another stress test just last week, but this time the test was in San Antonio and they did the chemical test rather than the treadmill. I think that may have just been because they were so busy that day and the chemical test is takes a lot less time than the treadmill. The doctors were all happy with the results of the test so I guess I am too. I don't think the WPW even showed up on this test.

You did really well, I doubt I could keep the treadmill going for 16 minutes the way the keep increasing the elevation and speed on you.