Quote from Christian_SN
question? so a stress test is an in-duced rhythm disturbance? as in ST slope decellerations and blockage? or we want to see if there is a rhythm disturbance during the stresstest?
Nope. A stress test is looking for ischemia. A stress-test 'stresses' the heart (by speeding it up). If your coronaries are 'tight' (producing ischemia) this test will (usually) show it. The traditional way to speed your rate is by running a treadmill...Or, (for people unable to run so well) drugs can be given.
The 'treadmill' or 'stress' component of the test shows results if a person developes st/t-wave changes (and chest discomfort) on 12-lead (which is continuosly running during this test).
The newer stress-tests utilize nuclear medicine (ie thallium stress-test) in conjunction with the standard tread-mill or injection stress. These are more accurate in that they will show changes that may be more subtle or undetectable by 12-lead. (they take 'pictures' before and after stress).
BTW, i dont beleive a stress-test was mentioned in my previous post...and the other 3 (echo, halter-monitor, 12-lead) are different tests.
And as an aside, abnormal rhythm's can be induced by ischemia...in which case a stress-test may 'induce' one...but it's not the intention of the test.
EP-studies are the fancy tests that attempt to induce abnormal rhythms...if you're interested.