Pathology: Blood or qi deficiency. This is seen in cases of deficiencies and failure of Qi and blood. It can also be seen in disharmonies of the even emotions, weakness in Yang Qi, internal damage to jing, and penetration of dampness.
Testing for venous blood clots. Venous blood clots may be detected in a variety of ways, though ultrasound is most commonly used. Occasionally, the patient's size and shape limit the ability for ultrasound to provide a definitive answer. Venography is an alternative test to look for a clot.
Electrocardiograms (ECGs or EKGs) are used in the evaluation of patients with chest discomfort but can be normal or not diagnostic in patients with a myocardial infarction. Thus, blood will be obtained to check for any heart damage that can be indicated by abnormal protein levels in the blood.