Division of Nuclear Cardiology

Division of Nuclear Cardiology

Exams available at Nuclear Medicine of Naples:

  • Gated Myoview or Cardolite: ¬†Exercise, Regadenoson (pharmacologic), Dobutamine
  • Thallium Viability Study
  • Exercise Only (Non Nuclear)
  • Rest MUGA

>>See brochures at right to learn more about these exams.


Heart disease is the principal cause of death in the western world . Each year in the U.S.A, more than 500,000 men and women die from coronary artery disease. Over the past twenty years, major advances have been made in the diagnosis and treatment of coronary heart disease. Nuclear Cardiology has played a crucial role in establishing the diagnosis of heart disease and in the assessment of how extensive the disease may be, and in predicting possible future problems such as risk for heart attack in the setting of coronary artery disease.Coronary artery disease results from the narrowing of the blood vessels that supply the heart. The blood vessels become narrow when fatty deposits build up inside the arterial wall. This is the process of atherosclerosis. When the arteries become clogged, the blood flow to the heart muscle is impaired and Nuclear cardiology studies use noninvasive techniques to assess myocardial blood flow, evaluate the pumping function of the heart as well as visualize the size and location of a heart attack. Among the techniques of nuclear cardiology, myocardial perfusion imaging is the most widely used.Myocardial perfusion images are combined with exercise or medicinal stress tests to assess the blood flow to the heart muscle. Exercise is most commonly achieved by walking on the treadmill. A “chemical” stress test using the drug Regadenoson, persantine, or dobutamine may be performed as an alternative in patients who are not able to exercise maximally, have a physical disability, or are on medications that limit their heart from accelerating during exercise. The chemical stress tests are proven to provide similar information about the heart’s blood flow with equal ability.The images are obtained by injecting a small amount of an imaging agent known as Myoview (Tetrofosmin), Cardiolite ( Sestamibi) or Thallium into the blood stream during rest and during exercise or chemical stress. A scanning device known as a gamma camera is used to measure the uptake by the heart of the imaging material during exercise or chemical stress and at rest. If there is significant blockage of a coronary artery, the heart muscle may receive insufficient blood supply in the setting of exercise or during chemical stress resulting in a partial starvation effect. This decrease in blood flow will be detected by the gamma camera and recorded on the images.Myocardial perfusion studies can thus identify areas of the heart muscle that have an inadequate blood supply as well as the areas of heart muscle that are scarred from a heart attack. In addition to the localization of the coronary artery with disease referred to as atherosclerosis, myocardial perfusion studies quantify the extent of the heart muscle with a limited blood flow and can also provide information about the pumping function of the heart. Thus, nuclear cardiology is superior to routine exercise stress testing and provides the necessary information to help identify which patients are at an increased risk for a heart attack and may be candidates for invasive procedures such as coronary angiography, angioplasty and heart surgery.Nuclear cardiology studies will continue to play an increasingly important role in the non-invasive diagnosis of coronary disease in those patients that present with intermediate to high risk of having the disease, the assessment of the pumping function of the heart, and in the prediction of outcomes in patients with heart disease. Also, nuclear cardiology helps determine those at increased risk for a heart attack and those that may be candidates for invasive procedures such as coronary angiography, angioplasty and heart surgery.


 

 

 

 

 

 

 

 

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What is a Pharmacologic Myoview Stress Test?
Div of nuclear cardiologyMUGAColor1
What is an exercise Myoview Stress Test?
MUGA Brochure
What is a MUGA Scan?