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Can I ask why you want to do a " do it yourself" stress test?
PS - please treat this answer as an " info request" - I posted in response to your "answer" above and can only post an " answer" in reply.
So you have no history of chest pains?
A full stress test is quite tough.
It if you are on a treadmill the first 30-60seconds are slow then it very rapidly builds up to a very intense workout.
Be aware that the purpose is to push you to achieve your maximal heart rate ( approx 220 - your age ) - so for you that would be about 160 beats per minute - this can only be achieved by increasing the speed as well as the incline at which you are running.
The heart rate is monitored to see if you are achieving your max heart rate - on a full stress test I expect that you would mange 6 - 8 minutes only.
The tests that you have had already by your cardiologist do not exclude you from having ischaemic heart disease - so if you have this then trying to do your own stress test may precipitate chest pains.
If you are interested in pushing yourself more physically then the best place to do this would be your local gym under advice form a suitably qualified instructor.
I am sure that you can do more that the low intensity that you participate in at present.
Please get back to me if you need to.
Ischaemic heart disease - this is when the arteries that take blood to the heart become narrowed - this can result in angina , heart attacks etc.
I would not worry about pacs - I assume you mean ectopic heartbeats when you say this? Unless you have an structural abnormality on your echo ( you do not ) they are clinically irrelevant - but can cause anxiety.
I am not an expert on diastolic dysfunction but it is a common finding as we get older especially in those with hypertension. Your cardiologist is clearly happy with your echo and I have no reason to give you a different answer.