Doc thought he "saw something" on my last EKG, so he sent me for a stress test. I don't know how long it took, but they had me going 6 mph on a 16% grade before I got to 140 bpm. I see the cardiologist next month to discuss the test (pre-scheduled.) Since the original doc sent me to the cardiologist, he's also seen the same thing in my wife, so I tend to think he's tilting at windmills.