MRI scan

During a MRI scan, pictures of almost all the tissue in the body are taken. The tissue that has the least hydrogen atoms, such as the bones turns out dark. The tissues that have many hydrogen atoms, such as fatty tissue looks much brighter. The timing of the radio wave pulses is constantly changed to gain information about the different types of tissues present. An MRI scan is normally used as an extremely accurate method of disease detection and structural abnormalities throughout the body.

Patient with any metallic materials within the body must notify their physician prior to the MRI scan. This is because, metallic chips, materials, metal implants, surgical clips or foreign materials (artificial joints, metallic bone plates or prosthetic devices, etc) can significantly distort the images obtained by an MRI scanner. Patients with pacemakers, metal chips or clips in and around the eyeballs cannot be scanned by an MRI because of the risk that the magnet may move the metal in these areas. Patients with artificial heart valves, metallic ear implants, bullet fragments and chemotherapy or insulin pumps should not undergo MRI scanning.

MRI scan can cause a small risk to the fetus in the first 12 weeks of pregnancy. Therefore scans are not performed on pregnant women. The MRI machine produces loud thumping and humming noise when the procedure is performed. Therefore ear plugs are usually given to the patients to reduce the noise. MRI scans are a useful aid in the assessment of certain back conditions. MRI is an aid to detail studies of nerve root injuries like lumbar disc herniation and lumbar spinal stenosis. It is also extensively used in spinal disc and lumbar disc diseases and isthmic spondylolisthesis. It is also useful to rule out tumors and spinal infections.

Echocardiogram

An echocardiogram is a diagnostic test that gives the doctor an idea of how the heart appears in motion. An echo uses ultrasound waves to pick up echoes from different parts of your heart. An echocardiogram throws light on the size of the heart and the condition of the heart valves. The pumping capacity of the heart is determined with an echocardiogram. Any damage to heart muscles or valves can be diagnosed with an echocardiogram. An echocardiogram is helpful in detecting any structural problems of the heart, its chambers or blood vessels surrounding it. An echocardiogram is used to detect any blood clots within the heart. This diagnostic test is used to check for causes of irregular heartbeats, enlarged heart or heart murmurs. The functioning of the heart after an attack can be checked with an echocardiogram.

Trans thoracic echocardiogram is the standard cardiogram where the doctor monitors sound wave echoes that bounce off the heart and other internal structures.

Doppler echocardiogram is based on Doppler signals that change pitch when they bounce off the heart and blood vessels. This feature is often part of other cardiogram procedures.

Stress echocardiogram is taken when a patient is undergoing a treadmill stress test.

Trans esophageal echocardiogram involves passing a probe through the throat into the chest wall. The transducer then shows clear images of the heart. This type of echocardiogram can be uncomfortable and is often performed under sedative. Trans esophageal echocardiogram is also used during surgery to monitor the heart function. Abnormal blood flow between the heart's chambers can be detected.

Rheumatic Fever

Rheumatic fever is an inflammatory disease caused by streptococcus bacteria. Typically rheumatic fever tends to affect children in the age group 6 - 15 years. Often rheumatic fever tends to follow a strep throat or scarlet fever or any other streptococcus infection. Rheumatic fever is characterized by symptoms such as fever and skin rash. The joints tend to get swollen and painful. Rheumatic fever damages the heart valves and can lead to severe disabling problems. Persons who have suffered a case of rheumatic fever have a tendency to develop flare-ups with repeated strep infections. The patient may experience chest pain, fatigue and shortness of breath. The patient suffers heart inflammation accompanied by weakness or chest pain. There may be involuntary jerky movements of hands and legs. Rheumatic fever can lead to Sydenham's chorea - a temporary nervous system disorder.

Blood counts, ESR and ECG help in diagnosing rheumatic fever. A physician will check joints for pain and inflammation and listen for any abnormal rhythms in your heart. It is essential that persons suffering from strep infection treat it without delay lest it manifest into rheumatic fever. Any nodules over swollen joints and red rashes on the chest, back and abdomen must not be ignored. Treatment for rheumatic fever involves reduction of inflammation and antibiotics such as penicillin, sulfadiazine or erythromycin. Persons suffering from rheumatic fever can suffer heart damage and attacks. Treatment for rheumatic fever usually includes anti-infective agents and anti-inflammatory agents. Sometimes cardiac medications are also prescribed for patients suffering from rheumatic fever.