An aneurysm is a pathologic dilatation of a blood vessel due to weakening of the vessel’s wall. The abdominal aorta is a major artery, which arises directly from the heart and supplies blood to the bottom half of your body. Abdominal aortic aneurysms are usually asymptomatic until serious complications arise.
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Your body responds to everything you do to it. For example, raising your arms may cause a noticeable drop in heart rate even in perfectly healthy individuals. A decrease in heart rate when raising your arms is a normal response to change in venous return. Normal cardiac physiology is responsible for this phenomenon.
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When the body is injured, signals are sent from the site of damage to the spinal cord. As a central command center, the nervous system regulates the body’s response to the pain through a variety of reflexes.
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Various lung and heart conditions require supplemental oxygen to prevent chronic hypoxemia, or low blood oxygen levels. If you are breathing through your mouth while receiving supplemental oxygen through a nasal tube, you are not receiving the full benefits of your oxygen therapy.
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