Exercise-induced asthma is a condition of respiratory difficulty (bronchoconstriction) that is related to histamine release,is triggered by aerobic exercise, and lasts several minutes. Causes include medical conditions, environmental factors, and medications. The image below illustrates the pathogenesis of asthma.
A myelogram is an invasive diagnostic test that uses x-rays to examine the spinal canal. A special dye is injected into the spinal canal through a hollow needle. An x-ray fluoroscope then records the images formed by the dye. Myelograms can show conditions affecting the spinal cord and nerves within the spinal canal.
Myelomalacia in Dogs. âMyelomalaciaâ or âhematomyeliaâ is an acute, progressive, and ischemic (due to impaired blood supply) necrosis of the spinal cord after injuring the spinal cord. The premature death (necrosis) of the spinal cord cells first appears at the site of the injury but progresses forward and backward from the point of injury over time.