Wednesday, April 13, 2011

Test for heart diseases - nuclear stress test - Gated blood pool scan - Cardiac catheter study - Left ventriculogram - Pacemakers



INVESTIGATIONS FOR HEART DISEASES 


NUCLEAR STRESS TEST 

A nuclear stress test helps doctors see images of the heart while at rest and shortly after you've practiced. The test can give information about the size of your heart chambers such as the heart is pumping blood, and if the heart muscle is damaged or dead. Nuclear testing stress may provide information on the arteries and if they can be narrowed or blocked because of coronary artery disease. This test is the same as the stress test, with the exception of doctors will give a small amount of radioactive substance just before the end of the year part of the test. This radioactive substance is not harmful to your body or your organs.
The results of the nuclear test stress can show doctors if the heart does not work properly when you are at rest, exercise, or both. If the test shows that blood flow is normal while you are at rest but not during a normal year, because doctors know that your blood flow to the heart is not adequate during times of stress. The heart normally pumps more blood during periods of physical exertion. If test results are not normal during both parts of the test (rest and exercise), a part of your heart is permanently deprived of blood or scar. If doctors can not see the radioactive substance in a part of your heart, it probably means that the portion of heart muscle is dead, either due to a previous heart attack, or because the coronary arteries supplying blood to the region of the heart are blocked.

GATED BLOOD POOL SCAN 


A door Blood Pool Scan is a test radioisotope dye that shows how blood flows in your heart at rest, exercise, or both. The test can tell doctors about the heart to pump blood and if it works harder to compensate for one or more blocked arteries. This test is also very useful for finding your ejection fraction, which is the percentage of blood that is pumped from the heart's lower chambers (the ventricles) with each heartbeat. The review also called analysis of several units closed or MUGA. Research and analysis uses a radioactive substance is injected into the bloodstream. The radioactive "tags", or "tags" red blood cells in the blood. This substance is safe and will not affect your blood or organs. Then doctors use a gamma camera to take pictures of your heart that the "label" red blood cells to circulate.



CARDIAC CATHETER STUDY


Also known as coronary angiography (angiogram), this is a test to evaluate coronary arteries and heart muscle. And the gold standard that all other tests to look at blood flow in cardiac assessment. Further developed and refined several decades, cardiac catheterization is running fine, flexible wires groin artery tube, or the elbow to the heart. It requires only local anesthesia to numb the skin for increasing the artery section. The tube is passed into the heart, where color is injected visible coronary and cardiac muscle. Images (angiograms) are conducted using the X-ray machines to help.


LEFT VENTRICULOGRAM WITH NORMAL LV FUNCTION 


Cardiologist to determine if the coronary arteries are filled and to what extent. This knowledge is important to plan the best treatment for patients with coronary artery disease (atherosclerosis), ranging from regular medications with angioplasty + / - stent insertion of coronary bypass surgery. In addition to the pressure measurements in a valve disease be evaluated process takes only 10-20 minutes in most cases. However, as we are dealing with the heart, patients are kept in the hospital a few hours after the procedure before being allowed home. Patients are not to eat or drink anything for 2-4 hours before surgery. You should take your usual medications with a sip of water, but in general you are advised to withdraw diuretics (water pills) that day. Diabetics are advised individuals, particularly those who took metformin or insulin that patients taking warfarin.

PACEMAKERS

Permanent pacemakers were very sophisticated devices that are implanted to treat various heart rhythm disorders. Originally they were only able to treat slow heart rhythms, but the modern generation pacemakers, help regulate heartbeat and preventing irregular rhythms too. Pacemakers have also been developed to help the muscles weakened heart pump more efficiently.

The pacemaker is composed of a metal box (generator), which contains the battery and circuit for interpreting changes in heart rate. The pacemaker is implanted under local anesthesia under the skin of the anterior chest wall (just below the collarbone). It is connected to one or more tracks that are swept under the direction of X-ray in a vein in the chest at the bottom so that the end of the track (s) is in a chamber of the heart in particular. The pacemaker senses the heart's electrical rhythm and generate the electrical impulses that pass along the track (s) to make the heart beat regularly when the heart is unduly delayed. Pacemakers are effective treatments for outages and other anomalies very safe heart rate. The aim is to restore the patient to a normal life.








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