The Cardiac Stress Test for the Heart

The isotope is injected intravenously and absorbed by healthy create from raw stuff at a known rate. The da Gamma rays emitted by the isotope ar detected by a da Gamma scintillation tv camera. During the running game, the patient lies still and is monitored with an ECG throughout the test. The camera is suspended above the table, and the table rotates, so different views of the shopping center poop be imaged. The camera records technetium's movement through the heart, and the results ar recorded on a computer for later analysis. The glance takes from 30 to 60 minutes, and is done cardinal to three hours subsequently the technetium is injected.

The technetium exhaust utilise Tc-99m stannous pyrophosphate, which binds to calcium De Milto, 2001). After a heart attack, tiny calcium deposits pop out on diseased heart valves and damaged heart tissue within 12 hours of the heart attack. They argon usually seen two to three days after the heart attack, and are deceased within one to two weeks. However, they may last for some(prenominal) months. The technetium discern provides better image quality than thallium, which is oft used as the isotope in cardiac nuclear vision studies, because it has a shorter half-life and so a higher pane of glass can be given. Studies have shown that a technetium skim over is far more accurate than an ECG in detective work a heart attack in progress. The technetium scan does not pose any risk to the patient, and the isotope is gone

Berger, Abi. (2000). Science commentary: Electrocardiography. British Medical Journal, 321(7255): 218-219.

Warkentin, Donald L. (2001). try out echocardiography. Clinical Reference Systems. Annual 2001, 1853.

Doppler techniques are of three types: pulsed wave, consecutive wave, and color ascend (Berger, 219). Pulsed wave and continuous wave Dopplers are used to detect the direction and velocity of blood watercourse crosswise heart valves, and in color flow imagery a pictorially colored representation of blood flow in the heart and across the valves is obtained. This can be used to determine the direction of blood flow, the presence of turbulence, regurgitation across valves, or abnormal blood flow patterns.

The above tests are very useful in assessing the functioning of the heart and the coronary thrombosis arteries. They disclose any malfunctions which are occurring, and guide the cardiologist in prescribing treatment for cardiac problems, including surgical interventions. They can also be used to follow the progress of patients after they have had a heart attack or heart surgery, and can be used for presurgical assessment of cardiac function. Since heart disease is the numeral one cause of death in the United States, these test are essential for monitoring cardiac health in patients with heart problems.

from the body within a few days. The scan exposes the patient to roughly the same amount of radiation as a chest x-ray.

A doctor supervises a tune echocardiogram because medications are given which increase the heart rate, and because there can be side effects to the drugs used in punctuate echocardiography (Warkentin, 2001). Dobutamine can cause low blood pressure or nausea, and can cause heart rhythm irregularities or slump existing ones. Dipyridamole may increase breathing problems for people with asthma or severe lung disease.

Echocardiography uses very high frequency depart waves (ultrasound) which generate echoes when they reach tissues in
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