Fluorescein angiography
Fluorescein angiography is a diagnostic test that aids visualization of the blood circulation in the retina and choroid. Fluorescein is a water-soluble dye that is injected into a vein in the patient's arm. It travels through the blood vessels of the body thereby aiding multiple photographing of the retina. The images obtained help in detecting any swelling or leakage in the blood vessels. The patient's eyes are dilated with mydriatic eye drops so that photographs of the inside of the eye can be taken.
Some patients may notice skin rash, itching or allergic reaction to the dye. Nausea or vomiting may be noticed. But this non-invasive test can usually be safely repeated. Abnormal results of fluorescein angiography test may indicate diabetic retinopathy, macular degeneration, or cancer. Ischaemia or oedema in the retina circulation can be detected with the help of fluorescein angiography
Arteriogram
Arteriogram or arteriography involves injection of contrast material into one of the arteries so as to get x-ray image of the blood vessel. An arteriogram is also called an angiogram.This diagnostic test is used to detect vascular conditions like aneurysm, stenosis or blockage. Angiograms can be specific to the blood vessels that are being examined, such as cerebral angiography, renal angiography, aortography or cardiac catherization. An IV line is inserted into a blood vessel of either the arm, neck or chest. A cathether is inserted though the IV and contrast material is injected into the desired vein or artery that has to be viewed. A series of x-rays are taken. The contrast material in the blood vessels causes them to appear opaque on an x-ray. There is a small risk of arteriogram leading to blood clots or bleeding and infection at the IV site.
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.
Bibliography / Reference
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