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Doctor insights on: How Does The Radioactivity Affect Someone After The Myocardial Perfusion Scan

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How does the radioactivity affect someone after the myocardial perfusion scan?

How does the radioactivity affect someone after the myocardial perfusion scan?

Cancer risk: It is important to remember that tests commonly done, such as myocardial perfusion scans, ct scans, and plain xrays, expose you to radiation. It adds up. There is an increased incidence of cancer many years later. We cannot practice medicine without those tests but they should only be performed when absolutely necessary. You should question the need for tests involving radiation exposure. ...Read more

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Perfusion (Definition)

Perfusion usually refers to blood flow into an ...Read more


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How does caffeine affect the results of thallium myocardial perfusion scan?

How does caffeine affect the results of thallium myocardial perfusion scan?

Not usually: Caffeine in the usual dietary dose won't affect an exercise stress test with thallium imaging, but if you ingest caffeine recently you cannot have a stress test with pharmacologic stress using Persantine (dipyridamole), Adenosine or Lexiscan because the caffeine interferes with the metabolism of those agents. ...Read more

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How does metal affect the results of a pet scan?

How does metal affect the results of a pet scan?

Usually not much: Metal can block the gamma rays that are emitted by the patient, and block the xrays from the ct portion of the pet/ct, which can create errors on one portion of the exam (called the attenuation corrected scan). However, the original pet data from the scan (uncorrected) is always available for review, so if the standard images have artifact on them, the uncorrected images can be reviewed. ...Read more

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How long does a MRI scan of the kidneys take?

How long does a MRI scan of the kidneys take?

Less tha an hour: And probably more like 30 -40 minutes, maybe not even this long. I think it has to do with how new the machine is. Some very new machines have faster acquisition times. The radiologist should be able to provide a more exact answer as to the length of time for this imaging test. ...Read more

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How long does an MRI of the brain take?

How long does an MRI of the brain take?

Read more here: Please see this articles (and its related articles) for a good summary of info on the actual MRI procedure: http://www.Conciergeradiologist.Com/mri-procedure.Html. ...Read more

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After an angiogram, how does the dye come out of the body?

After an angiogram, how does the dye come out of the body?

Kidneys: The contrast agent is filtered from the body by the kidney. This can take a day or so. Drinking fluids after the exam helps increase the rate of removal and helps protect the kidneys. ...Read more

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Can you tell me about the purpose of a myocardial perfusion scan [nuclear test]?

Can you tell me about the purpose of a myocardial perfusion scan [nuclear test]?

See blood flow: Myocardial perfusion studies show the pattern of blood flow (perfusion) to the tissue of the heart muscle. The radiotracer goes where the blood goes and this shows how well the tissue is nourished. It can be an indicator of blocked arteries when the perfusion pattern is abnormal. ...Read more

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After taking the Persantine thallium test my dr., informed me of the following; Decreased count rate in the anterior wall; reversible ischemia;; ?

After taking the Persantine  thallium test my dr., informed me of the following; Decreased count rate in the anterior wall; reversible ischemia;; ?

Cannot be sure it is: While decreased count in the anterior wall may be caused by ischemia( inadequate blood flow), there are frequently other causes. In females, decreased anterior wall counts may be an artifact due to the interposition of the breast between the camera and the heart. In true ischemia ,decreased count would be present only in the stress images. Please confirm this with your physician. ...Read more

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What does this mean? The liver has peak SUV of 3.2 compared to on the prior scan.

What does this mean?
 The liver has peak SUV of 3.2 compared to  
on the prior scan.

SUV=Std Uptake Value: The use of standardized uptake values (SUVs) is now common place in clinical FDG-PET/CT oncology imaging, and has a specific role in assessing patient response to cancer therapy. Read more at: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3026294/ ...Read more

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How long does radiation stay in your body after abdominal ct scan?

How long does radiation stay in your body after abdominal ct scan?

No radiation: stays in your body after the scan. The radiation passes through your body during the scan to make the CT image. ...Read more

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How long does the thoracic spine CT scan with dye take?

Very fast: Today's high speed scanners work very quickly. This exam should take around 10 minutes at the most. ...Read more

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How does pneumonia affect the ventilation – perfusion ratio?

How does pneumonia affect the ventilation – perfusion ratio?

Lowering ventilation: Pneumonia decreases the lungs ability to fully expand. This decreases ventilation and has little effect on perfusion. Therefore you have a decreased v/q ratio. ...Read more

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How does tiny arteries to the heart affect procedures?

How does tiny arteries to the heart affect procedures?

Ensure blood supply: The question is a little vague but i will try to explain. The small arteries to the heart (the coronary arteries) are what supply blood to the hearyt to keep it pumping. The big artery from the heart supplies the systemic circulation. If the small arteries get blocked, then you have a heart attack and may die. Any surgical proceedure may put enough stress on the heart to have a heart attack. ...Read more

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What are the uses of electrocardiogram .Does it can detect heart failure ..?

What are the uses of electrocardiogram .Does it can detect heart failure ..?

No: Heart failure is a clinical diagnosis - you have certain symptoms, such as shortness of breath and easy fatigue-ability, and if they are connected to abnormal heart function you may be diagnosed with heart failure. An ECG usually discloses underlying heart rhythm disturbances or the presence of coronary artery blockages, though much more can be detected. ...Read more

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After malaria treatment how long does the result still positive in the blood stream ?

After malaria treatment how long does the result still positive in the blood stream ?

Malaria: If the therapy is effective against the strain of plasmodium you have there should be a rapid (within a day) disappearance of the parasite from the erythrocytes, and free gametocytes should also not be present. If you are still showing positive results on blood smears you may have a resistant organism. Hope you are better soon. ...Read more

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What is the difference between nuclear medicine radiation and ct/x-ray? Is it true that the only radiation you receive in nuclear medicine is the radioactive tracer that is administered into your vein? If so, does this radiation not accumulate as ct/x ray

What is the difference between nuclear medicine radiation and ct/x-ray? Is it true that the only radiation you receive in nuclear medicine is the radioactive tracer that is administered into your vein? If so, does this radiation not accumulate as ct/x ray

Yes.: In nuclear medicine a radioactive "tracer" (e.g. Technetium) is injected into a vein and the gamma rays are emitted from the body and detected by a gamma camera placed against the body to create an image. The radioactivity decays over time and is also excreted from the body. With ct, the x-rays are passed through the body from an xray tube to create an image and do not reside in the body. ...Read more

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Approximately how long after a stroke does it take for brain tissue to fully decompose and does it appear with the same density as CSF on a CT scan?

Approximately how long after a stroke does it take for brain tissue to fully decompose and does it appear with the same density as CSF on a CT scan?

It depends: The size and type of the stroke, ischemic vs hemorrhagic, are the most important predictors. For most ischemic strokes, the majority of liquifaction necrosis (the decomposition) takes place in a few weeks but continued healing will continue after the necrosis. For hemorrhagic strokes, it typically takes longer for the body to absorb the blood and complete the healing process. ...Read more

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How does the radioactivity affect someone after the myocardial perfusion scan?

Cancer risk: It is important to remember that tests commonly done, such as myocardial perfusion scans, ct scans, and plain xrays, expose you to radiation. It adds up. There is an increased incidence of cancer many years later. We cannot practice medicine without those tests but they should only be performed when absolutely necessary. You should question the need for tests involving radiation exposure. ...Read more

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Could you go through the airport scanners after the myocardial perfusion scan?

Could you go through the airport scanners after the myocardial perfusion scan?

Indeed: However it would be a good idea to ask your cardiologist for a letter attesting to your test, the time, the isotope used, the half-life of that isotope, etc. The most commonly used isotope is technitium sestamibi 99 which has a half-life of only 6 hours, however when this radioactive isotope is in short or limited supply, thallium is often substituted, which has a half life of over 73 hours. ...Read more

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Can someone have a myocardial perfusion scan with a pacemaker?

Can someone have a myocardial perfusion scan with a pacemaker?

Yes: Yes, patients with implanted pacemakers have nuclear stress tests/myocardial perfusion scans. The EKG portion of the test will reflect the pacemaker (and likely a left bundle branch block) but reversible ischemia can still be detected in the scans. ...Read more

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Why would someone be scanned both front side and back during the myocardial perfusion scan?

Why would someone be scanned both front side and back during the myocardial perfusion scan?

Complete imaging: The heart is a 3 dimensional structure and the images are 2 dimensional. To completely visualize the entire heart, you need more than one view. Hard to fully describe the moon without flying around to the back side. ...Read more

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What are the risks in having a myocardial perfusion scan?

What are the risks in having a myocardial perfusion scan?

Stress associated : A myocardial perfusion scan is performed in two steps. One injection of a radiotracer at rest and another at stress ( either treadmill or pharmacological stress test with adenosine, regadenoson, dobutamine, dipyridamole). Only few skin reactions have been reported with the radiotracer injection. Risks are more associated with the stress used for the test such has angina, headache, nausea... ...Read more

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Can you consumer alcohol after a myocardial perfusion scan?

Can you consumer alcohol after a myocardial perfusion scan?

Yes: Of course, I am not recommending excessive amounts of alcohol with or without the scan. ...Read more

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Is it safe to be around kids after a myocardial perfusion scan?

Is it safe to be around kids after a myocardial perfusion scan?

Small exposure: The doses of radiopharmaceuticals used for these scans are usually relatively low dose. However thallium (half life 2.7 days) gives more radiation than technetium sestamibi (half life 6 hrs).Radiation reduction depends mainly on two factors time and distance. If you do not stay close to child for prolonged time then radiation exposure is reduced.Growing children more sensitive to radiation. ...Read more

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What is the point of a myocardial perfusion scan [nuclear test]?

What is the point of a myocardial perfusion scan [nuclear test]?

Cardiac imaging...: The myocardial perfusion scan is performed mostly to detect ischemia. It can also detect infarction (heart attack) as well as ejection fraction, wall motion abnormalities, and ventricular volumes. ...Read more

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What is the point of a myocardial perfusion scan [nuclear test]?

What is the point of a myocardial perfusion scan [nuclear test]?

Cardiac stress test..: A myocardial perfusion scan is used to detect ischemia or infarction (heart attack) and also to evaluation cardiac function (ejection fraction) and ventricular volumes. If there is significant ischemia sometimes a stent can be placed to prevent infarction. ...Read more

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What are nursing interventions after a myocardial perfusion scan?

What are nursing interventions after a myocardial perfusion scan?

Minimal: 1. Encourage good hydration to encourage washout of the tracer from the kidneys. Be careful against over-hydration in cardiac patients. 2. Rest - usually the patient will have undergone an exercise or pharmacologic stress test, and will be tired. 3. As in any cardiac patient, close monitoring is recommended. ...Read more

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Can you tell me about the purpose of a myocardial perfusion scan [nuclear test]?

See blood flow: Myocardial perfusion studies show the pattern of blood flow (perfusion) to the tissue of the heart muscle. The radiotracer goes where the blood goes and this shows how well the tissue is nourished. It can be an indicator of blocked arteries when the perfusion pattern is abnormal. ...Read more

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Could you tell me what is the purpose of a myocardial perfusion scan [nuclear test]?

Could you tell me what is the purpose of a myocardial perfusion scan [nuclear test]?

CAD: The purpose is to diagnose significant coronary artery disease (CAD). If the scan is positive for ischemic changes in the heart, then you will benefit from aggressive medical treatment, angiographic treatment, or surgery. If the scan is negative (and done properly), your risk for CAD or a significant injury such as a heart attack in the next few years is very low. ...Read more

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Could you have a myocardial perfusion scan if you suffer from myoclonic dystonia?

Stress test: It is paramount that the patient is completely still when undergoing myocardial perfusion scanning -- therefore if the myoclonic dystonia is well controlled then you could probably have the scan -- otherwise you have other option of stress and imaging modality. ...Read more

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Could you have a myocardial perfusion scan after a cataract operation?

Could you have a myocardial perfusion scan after a cataract operation?

Yes: Modern day cataract surgery is minimally invasive and can even be done with just eye-drop (topical) anesthesia. While an implant (silicone or acrylic) is placed during the surgery, there are no restrictions on any future nuclear imaging, mri, ct scan etc.. ...Read more

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What is the purpose of a myocardial perfusion scan?

Nuclear stress test: This is a specialized form of stress test used to confirm the presence of coronary artery disease in patients suspected of having this problem. It uses a low-level nuclear tracer to assess blood flow to the heart muscle before and after exercise-induced stress. In patients who cannot exercise, other pharmacologic means can be used such as adenosine, lexiscan, persantine, or dobutamine. ...Read more

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What is the function of a myocardial perfusion scan?

What is the function of a myocardial perfusion scan?

Blood flow to heart: It shows blood flow to the heart. It can show old scar of a heart attack or heart muscle that is not getting enough blood , which could mean a future heart attack. ...Read more

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Can I eat food before having myocardial perfusion scan?

Can I eat food before having myocardial perfusion scan?

No: No because the blood flow to stomach increased and it makes the image less accurate. ...Read more

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Can you get results of your myocardial perfusion scan the same day?

Sometimes: It is possible but more often you will get your results the next business day. ...Read more

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