Stress Tests in Stenotic Valve Patients
Stress Tests in Stenotic Valve Patients
Click here for an earlier thread on Stress Tests:
http://www.valvereplacement.com/forums/showthread.php?t=8350&highlight=stress
From the American College of Cardiologists/American Heart Association Guidelines for the Management of Patients With Valvular Heart Disease (bolding mine):
Stress Tests and ACC/AHA Guidelines
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"Exercise testing in adults with AS has been discouraged largely because of concerns about safety. Furthermore, when used to assess the presence or absence of CAD, the test has limited diagnostic accuracy. Presumably, this is due to the presence of an abnormal baseline ECG, LV hypertrophy, and limited coronary flow reserve. Certainly, exercise testing should not be performed in symptomatic patients."
The quote is from the American College of Cardiology Foundation (ACC) Site,
http://www.acc.org/clinical/guidelines/valvular/jac5929fla16.htm#A4
"ACC/AHA Guidelines for the Management of Patients With Valvular Heart Disease" and is found in "4. Management of the Asymptomatic Patient," under "a. Initial Evaluation," third paragraph.
The quote above was from the segment for
asymptomatic (
nonsymptomatic) patients, and I only highlighted the one line about symptomatic patients for others who may be reading. If I can find and read this as an enthusiastic non-medical professional, I think a cardiologist should be able to, even required to...
Regardless, patients have a right to refuse tests. Doctors know there is usually more than one way to skin a cat, and will find a more acceptable test if pressed to. If the stenosis is advanced enough to be symptomatic, it is beyond the point of needing further clarification by a stress test, especially in light of both the risk to the patient and the lack of accuracy pointed out in the ACC/AHA quote.
Frequently, people who
have gone through with this have come back with the answer that the results were "inconclusive." Not much payback for the risk. There have been several who have posted with bad or near-fatal experiences during the testing.
The fact that someone would be there to try to revive you if you have a heart attack or go into dangerous arrythmias is hardly reassuring. And for a patient with an enlarged aorta, an
immediate open heart surgery would be the
only available response to a dissection caused by the effort,
if it could be accomplished in time (remember, you're with a cardiologist for this test, not a cardiothoracic surgeon).
Based on the ACC/AHA guidelines and common sense, it would certainly seem to press the definition of reckless endangerment to order an exercise stress test for a symptomatic, stenotic aortic valve patient with an aortic aneurism. It would seem likewise both pointless and dangerous on a symptomatic aortic stenosis patient without an aortic aneurism, or a non-symptomatic stenosis patient, for the same reasons given in the guidelines.
Stress tests can have their place in heart problem diagnosis, but it's not in aortic stenosis, and probably not in basic valve issues in general. Mary was right, I really
don't have much patience for this cardiologists' cash cow.
Best wishes,