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.
What is a transthoracic echocardiogram? A transthoracic echocardiogram (TTE) is a procedure used to check for problems with your heart. It will also show any problems in the blood vessels near your heart. Sound waves are sent through a handheld device placed on your chest. The sound waves show the structure and function of your heart through pictures on a monitor. You will lie on your back or left side.