Stenosis
Unusual narrowing of the blood vessels or other tubular structures or organs is referred to as stenosis. In simple words stenosis means narrowing of the various body parts. The common causes for stenosis include birth defects, inflammation, neoplasm (abnormal proliferation of cells), ischemia (reduction of blood supply thus damaging tissues), infection, iatrogenic (complications arising from any treatment) and atherosclerosis.
Spinal stenosis: Specific causes include rheumatoid arthritis, osteoarthritis, aging, spinal injury or tumor and spondylosis. Symptoms include pain and weakness in the legs along with cramps, imbalance and loss of control over bladder and bowel movements.
Mitral valve stenosis: Specific causes include endocarditis, atrial myoxma, rheumatic fever and Lutembacher syndrome. Symptoms of mitral valve stenosis are fatigue, recurrent respiratory infections and swelling in the feet.
Aortic valve stenosis: This type of stenois may be caused by rheumatic fever, Williams syndrome, LDL receptor deficiency and senile or bicuspid aortic valves. The typical symptoms of aortic valve stenosis are chest pain and heart murmur, fatigue and shortness of breath and heart palpitations.
Pulmonary valve stenosis: Specific causes include deformity during fetal development, rheumatic fever and endocarditis. This type of stenosis is symptomized by cough and fatigue, fluid retention and shortness of breath.
Treatment differs according to the type of stenosis. While physical therapy, drugs like analgesics and lumbar brace are used to manage spinal stenosis, aortic valve stenosis and pulmonary valve stenosis are treated with valve replacement surgery.
Aortic Stenosis
Aortic Stenosis is a condition where the aortic valve of the heart becomes narrowed. This leads to obstructed blood flow to the aorta from the left ventricle. Aortic Stenosis is more common among men. Elderly persons are likely to face this heart valve disease. When the narrowing of the aortic valve is to a small extent, the patient does not feel any discomfort or other symptoms. But when there is significant reduction in the valve area, it leads to decrease in cardiac output and may result in heart failure. Aortic valve stenosis must not be ignored as it systematically weakens the heart. It forces the left ventricle to work harder.
Aortic Stenosis is often caused by rheumatic fever, calcification of the valve, coronary artery disease or heart murmur. Symptoms of aortic stenosis include chest pain (angina), shortness of breath and fainting spells. They occur due to the heart muscle's inablity to cope up with the extreme pressure load laid by Aortic stenosis. Patients suffering from aortic stenosis are likely to feel palpiatations, dizziness and chest pain on exertion.
Enlargement of the left ventricle or Aortic stenosis can be diagnosed with the aid of Doppler ultrasound, echocardiogram, chest x-ray and transesophageal echocardiogram. The physician will be able to notice arrhythmias and enlargement of left ventricle. Diuretics are prescribed to reduce high lung pressure. Blood thinners are used to prevent blood clots from being formed on the surface of the heart valves. Replacement of aortic valves is done in severe cases of valvular failure. Balloon valvuloplasty is a surgical procedure similar to balloon angiography where a balloon is placed in an artery and later inflated to relieve obstruction.
Myelogram
Myelogram is a diagnostic test that helps in detecting abnormalities of the spine, spinal cord and spinal fluid. A contrast dye is injected into the the neck area (cisternal myelogram) or in the lower back area (lumbar myelogram). Any abnormality or indentation on the spinal cord can be identified with a myelogram test. A bulging disc, tumor or herniated disk can lead to indentations on the spinal cord. A myelogram is conducted for patients who suffer spinal stenosis, herniated disc or inflammation of the arachnoid membrane. Myelogram aids in diagnosing problems of blood supply to the spine and tumors.
A myelogram is ideal for patients who have had metal implants in their spine, preventing them from undergoing an MRI scan or CT scan. A spinal tap is performed to inject the dye into the spinal sac. When combined with a CT scan, a myelogram helps in understanding the condition of the spinal bones and muscles. A patient scheduled for a myelogram must not eat for few hours prior to the test. Pregnant women and those with a history of asthma or epilepsy must keep the doctor informed.
Fluid intake must be maintained so as to remain well hydrated. Medications such as blood thinners, antidepressants and diabetes medicines may need to be temporarily stopped. A person is asked to lie down with head in elevated position for few hours after the myelogram test. The risks associated with a myelogram include meningitis, spinal headache and allergic reactions.
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