diagnostic procedure of cardiovascular system forearm ischemic exercise test 2025-06-01T10:51:37Z The forearm ischemic exercise test (FIET) is a very important clinical tool for evaluation of patients suspected to have a metabolic disorder of muscle function. Failure to elevate lactate in blood washed out from ischemically exercised muscles confirms an abnormality of glycolytic metabolism. A normal increase of lactate on FIET is assumed to rule out a disorder of glycolytic metabolism. To perform the test, a blood pressure cuff is inflated on the arm to induce ischemia while the patient repeatedly contracts the forearm muscles for several minutes. Blood samples are drawn at baseline and at several time points after exercise. forearm ischemic test PMID:3476851 noninvasive exercise test