Abdominal Aortic Aneurysm
An aneurysm indicates a localized dilation of a blood vessel. An aortic aneursym is a medical condition where a large artery bulges. This usually occurs due to some inherent weakness in the aortic wall at a particular location. Abdominal aortic aneurysm generally occurs due to infection, congenital weakening of the arterial wall or trauma. With an aortic aneurysm, there is a risk of rupture and possible internal hemorrhage. Rupture of an aneurysm is a medical emergency. If not treated immediately, this condition can be fatal. Men are more likely to develop abdominal aortic aneurysm. Typically this condition occurs in the age group of 60 - 70 years.
Cigarettte smoking, hypertension, diabetes and high cholesterol can increase the risk of developing aortic aneurysm. Most of the time abdominal aortic aneurysm is asymptomatic. This condition is often noticed during abdominal scan or CT scan. Often aortic aneurysms develop over time. The common cause of an aortic aneursym is arteriosclerosis. This consequently leads to weakened aortic walls. An abdominal aortic aneurysm may cause throbbing in a part of the abdominal mass. But if there has been a rupture, it can result in severe pain in the lower back. The person is likely to feel faint and light headed. There is excessive thirst and tachycardia.
Abdominal x-rays and angriography of aorta can help reveal an aortic aneurysm. The complications of an aortic aneurysm include myocardial infection, arterial embolism and stroke. Medications are prescribed to those suffering from small aortic aneurysms. This can slow down the rate of growth of the aneurysm.
Surgical treatment of aortic aneurysm involves opening up the aortal dilation and inserting a patch tube. Surgery is resorted to depending on the state of the aneurysm and its risk of rupture. Stenting is another surgical option for abdominal aortic aneurysm.
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.
Cardiac Catheterization
Cardiac catheterization is a test which is performed to obtain certain diagnostic information about the heart. Patients may require this medical therapy rather than undergo angioplasty or bypass surgery when they suffer from rare or easily controlled episodes of angina. Alternatively, cardiac catheterization is not performed in patients who have infrequent episodes of angina and in whom angina can be easily controlled. When a patient has heart failure due to suspected coronary artery disease or there is suspected coronary artery disease, cardiac catheterization is conducted. Cardiac catheterization can help:
Measure blood pressure within heart.
Know the amount of oxygen in the blood.
Check the pumping ability of the heart muscle.
Check blood flow through the heart after surgery.
Collect blood samples from the heart.
Inject dye into the coronary arteries.
To provide treatment in certain types of heart conditions like congenital heart defects and how severe it is.
To find out a coronary artery disease and if found to pinpoint the size and location of fat and calcium deposits that have built up in coronary artery from atherosclerosis.
To determine whether the patient needs bypass surgery or angioplasty.
Examine the arteries of the heart with an x-ray technique called fluoroscopy.
The patient is asked not to drink or eat anything, except a small amount of water, for atleast 6 to 12 hours before the test. The patient is tested for allergy to iodine or other medications. Patients suffering from kidney disease or diabetes or bleeding disorders must keep the cardiologist informed. The cardiac catheterization test is performed in a cath lab by a cardiologist. The actual catheterization procedure takes about 15 - 30 minutes. The patient's electrocardiogram that continuously records the electrical activity of the heart is taken. A pulse oximeter device that measures the oxygen levels of the patients' blood is monitored. An intravenous needle is inserted into the patients' vein to give fluids or medicine during the catheterization procedure. A sedative is also given through this IV line which helps the patient to relax.
Cardiac catheterization procedure involves passing a catheter, a thin flexible tube, into the right or left side of the heart. The doctor inserts this thin plastic tube into the groin - femoral artery. Other places where in the catheter may be inserted are the elbow- brachial artery or the wrist - radial artery. From there it is slowly advanced into the chambers of the heart or into the coronary arteries. The doctor watches the progress of the catheter into the heart's vessels and chambers on the imaging screen. Pressures within the heart chambers are measured and the blood and tissue samples are also removed through the catheter. A small amount of dye is also injected through the catheter into the heart chamber or into one of the coronary arteries.
Therapeutic catheterization: Certain types of heart defects can be repaired using catheterization. For instance, if the coronary arteries are blocked, the cardiologist can use a catheter, guide wire and balloon to open and improve blood flow to the heart. This is termed as percutaneous coronary intervention (PCI).
Normal result indicate that there is no significant narrowing or blockage in the coronary arteries. Abnormal results may suggest that the heart does not pump blood normally or the valves in the heart may be weak. There may be leakage between heart chambers. There is a possibility of aortic aneurysm. Some complications with cardiac catheterization include heart attack or stroke, hematoma, puncture of the heart or arrhthmias.
|
