You get a headache after a nuclear stress test primarily due to the medications (like adenosine or regadenoson) used to simulate exercise, which widen blood vessels, causing flushing, dizziness, and headaches; the stress/fasting from the test itself; or sometimes a mild reaction to the radioactive tracer, but these symptoms are usually short-lived and resolve on their own. Staying hydrated and resting can help, but if headaches are severe or persistent, contact your doctor.
Nuclear Stress Test Side effects
A nuclear stress test is a tool to check the heart's health, but some patients feel bad after a nuclear stress test, experiencing temporary side effects from the exercise or medication used. Although generally safe, some patients may experience temporary fatigue, dizziness, or mild allergic reactions.
Nuclear stress tests also involve significant radiation exposure (equivalent to 400 chest x-rays!) and may contribute to as many as 491 additional cancer cases annually.
The medicine used in this test contains a very small amount of radiation, no more than you might be exposed to in 2 to 3 years of your normal life. Less than 1 in 10,000 people who have a nuclear stress test have a serious problem from the test. Ask your doctor or nurse any questions you have about your test.
Cardiac stress tests for elderly patients are vital tools for evaluating heart health. They are particularly important for older adults, as the risk of developing a heart condition increases with age.
What is an Adenosine or Lexiscan nuclear scan? It is similar to the exercise nuclear stress test except for the fact that Adenosine or Lexiscan is used to stress the heart. Adenosine is infused over 4-6 minutes, while Lexiscan is given over a few seconds.
If a nuclear stress test shows that you have poor blood flow because of artery blockages, your healthcare provider will want to keep CAD from getting worse. They'll want to prevent you from having a heart attack. To do this, you may need to: Stop using tobacco products and lower your salt use.
Researchers emphasize that both nuclear stress tests and CT angiograms expose patients to radiation. While many newer CT scans deliver substantially lower doses of radiation than the scans used in nuclear stress tests, the dose and protocols can vary widely from hospital to hospital, researchers say.
A radioactive substance, such as thallium or sestamibi, will be injected into one of your veins. You will lie down and wait for between 15 and 45 minutes. A special camera will scan your heart and create pictures to show how the substance has traveled through your blood and into your heart.
Other signs you may have atherosclerosis (blocked arteries)
A stress test is generally highly accurate for spotting blocked arteries. Adding imaging tests, like nuclear imaging or an echocardiogram, makes them more reliable. However, without these extra images, stress tests might miss smaller blockages or issues.
Oftentimes, the next step for people who fail a stress test, and who have risk factors for or symptoms of cardiovascular disease, is an imaging test called a coronary angiography. Your doctor may call it a cardiac catheterization, or “cath” for short.
Your target heart rate during a stress test depends on your age. For adults, the maximum predicted heart rate is 220 minus your age. So, if you're 40 years old, the maximum predicted heart rate is 220 – 40 = 180.
The average time on a treadmill for a stress test varies by age, but most people last between 6–12 minutes. Younger, healthier individuals tend to exercise longer, while older adults or those with heart conditions may stop sooner. The test is safe and helps doctors understand your heart's health.
MRI is much more accurate than both nuclear and echo stress, and a cardiac stress MRI provides more information than perfusion, including viability, function and morphology, at a much higher resolution than either nuclear or echo,” he says.
Cardiac catheterization and angiogram.
This test can see blockages in the heart arteries. A doctor places a long, thin flexible tube called a catheter in a blood vessel, usually in the groin or wrist.
Although extremely rare, it's possible that a nuclear stress test could cause a heart attack.
Nearly half of all Americans have one of the three major risk factors for coronary artery disease: smoking, high blood pressure and high cholesterol. High blood pressure is often called “the silent killer” because you may have it without experiencing any symptoms.
A stress test shows how the heart works during physical activity. It also may be called an exercise stress test. Exercise makes the heart pump harder and faster. A stress test can show changes with blood flow within the heart.
Lexiscan® (regadenoson) injection is a prescription drug given through an IV line that increases blood flow through the arteries of the heart during a cardiac nuclear stress test. Lexiscan is given to patients when they are unable to exercise adequately for a stress test.
A cardiac MRI can help your health care team diagnose heart conditions including: Tissue damage from a heart attack. Heart artery blockages that are causing chest pain due to reduce blood flow. Inflammation in the middle muscular layer of the heart wall.
The nuclear technologist administers a small amount of tracer and you lie on your back on the scanner table, raising your arm above your head. This scan takes approximately 20 minutes to complete.