Bonsoir Paleogirl!
Ive had two stress echo treadmill tolerance tests over the past six months, both times I failed to reach peak heart rate.
The first test last September I lasted 7½ minutes (I think they were aiming for 12) due to breathlessness and fatigue. The second stress echo test, in January this year, I managed 5 minutes, again due to worsening breathlessness and fatigue.
A confusing addition to the mix of my exercise tolerance is my over ten-year diagnosis of
Chronic Fatigue Syndrome. So the fatigue and breathlessness may actually be caused by my general deconditioned state, or it may indeed be a symptom of worsening aortic stenosis, or perhaps a combination of both.
Either way, my consultant seems to want a clearer picture of what exactly my heart is doing under stress.
Consequently, instead of the need to exercise my heart by walking, a Dobutamine Stress Echo has been arranged to see what happens to my gradients (which are still low relative to my severe indexed aortic size) when my heart rate is increased incrementally to peak rate using a dobutamine infusion. My test is in a few weeks' time.
[A dobutamine stress echo]
produces high-quality images without the interference of deep breathing and muscle tremors caused by exercise.
A Dobutamine Stress Echo (DSE) is a specialised ultrasound examination where a medication, (Dobutamine) is used to replicate the effect of exercise by increasing the heart rate. This test is recommended for patients who, for many different reasons, cannot walk on a treadmill.
Give my love to France and the beautiful hills!