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<span>Stress Tests</span>
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<h1>Stress Tests</h1>
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<section><div class="mp-content"><h2>What are stress tests?</h2>
<p>Stress tests show how well your heart works when it's pumping hard. Some <a data-tid="277" href="https://medlineplus.gov/heartdiseases.html">heart diseases</a> are easier to find when your heart is working its hardest to pump blood through your body. So stress tests check your heart while you exercise on a treadmill or stationary bicycle. If you're not able to exercise, medicine can be used to make your heart work harder , as if you were exercising.</p>
<p>There are different types of stress tests. They all check:</p>
<ul>
<li>Blood flow in your heart</li>
<li>Your <a data-pid="27501" href="https://medlineplus.gov/lab-tests/measuring-blood-pressure/">blood pressure</a></li>
<li>The rate and rhythm of your heartbeat</li>
<li>The strength of the electrical signals that control your heartbeat</li>
</ul>
<p>Some stress tests also take pictures of your heart at rest and when it's working hard. The pictures provide more detail about how your heart is working.</p>
<p>Other names: exercise stress test, treadmill test, stress EKG, stress ECG, exercise tolerance test, exercise EKG, stress echocardiogram, nuclear stress test, thallium stress test, sestamibi stress test, cardiac MRI stress test, myocardial perfusion imaging test, cardiac single photon emission computed tomography (SPECT), stress perfusion test</p></div>
</section>
<section><div class="mp-content"><h2>What are they used for?</h2>
<p>Stress tests are most often used to find the cause of symptoms that may be from a heart problem.</p>
<p>The tests can help diagnose certain heart conditions, including:</p>
<ul>
<li><a data-tid="1276" href="https://medlineplus.gov/coronaryarterydisease.html">Coronary artery disease</a> (CAD) </li>
<li><a data-tid="142" href="https://medlineplus.gov/angina.html">Angina</a></li>
<li><a data-tid="147" href="https://medlineplus.gov/arrhythmia.html">Arrhythmia</a></li>
<li><a data-tid="199" href="https://medlineplus.gov/heartfailure.html">Heart failure</a></li>
<li><a data-tid="279" href="https://medlineplus.gov/heartvalvediseases.html">Heart valve diseases</a></li>
<li><a data-tid="3754" href="https://medlineplus.gov/cardiomyopathy.html">Cardiomyopathy</a></li>
</ul>
<p>Stress testing is also used:</p>
<ul>
<li>To find out how serious a known heart condition is, including the chance that you'll have a <a data-tid="5" href="https://medlineplus.gov/heartattack.html">heart attack</a> in the future.</li>
<li>To help make treatment decisions for a heart condition.</li>
</ul></div>
</section>
<section><div class="mp-content"><h2>Why do I need a stress test?</h2>
<p>You may need a stress test if you have symptoms that could be from a heart condition. Symptoms may include:</p>
<ul>
<li><a data-tid="4744" href="https://medlineplus.gov/chestpain.html">Chest pain</a> or discomfort without a known cause</li>
<li><a data-tid="3077" href="https://medlineplus.gov/breathingproblems.html">Shortness of breath</a></li>
<li>Irregular or rapid heartbeat that may feel like a fluttering in your chest</li>
<li>Feeling <a data-tid="216" href="https://medlineplus.gov/dizzinessandvertigo.html">dizzy</a> or lightheaded</li>
</ul>
<p>You may also need a stress test to check your heart health if you:</p>
<ul>
<li><strong>Have a heart condition</strong> with new or worsening symptoms.</li>
<li><strong>Are going to have surgery.</strong> Your health care provider may want to see if your heart is strong enough for the operation.</li>
<li><strong>Are being treated for heart disease.</strong> The test can show how much treatment is helping, including <a data-tid="4119" href="https://medlineplus.gov/heartsurgery.html">heart surgery</a>.</li>
<li><strong>Have a high risk for heart disease.</strong> Your risk may be higher than normal if you have a family history of heart disease and/or certain conditions, such as <a data-tid="4" href="https://medlineplus.gov/diabetes.html">diabetes</a>, that are linked to heart disease.</li>
<li><strong>Plan to start an exercise program.</strong> If you have a heart condition or a high risk for a heart condition, a stress test can show what level of exercise is safe for you. (Always talk with your provider before starting any strenuous, new exercise.)</li>
</ul></div>
</section>
<section><div class="mp-content"><h2>What happens during a stress test?</h2>
<p>Stress tests may be done with or without imaging (pictures of your heart). The most common type of test is an exercise stress test. It doesn't include pictures. <strong>But the main steps of an exercise stress test are part of all stress tests:</strong></p>
<ul>
<li>
<p><strong>You'll have a blood pressure cuff on your arm</strong> to check your blood pressure.</p>
</li>
<li>
<p><strong>Electrodes will be placed on your body for an <a data-pid="2181" href="https://medlineplus.gov/lab-tests/electrocardiogram/">electrocardiogram</a> test</strong> (also called EKG or ECG). Electrodes are small sensors that stick to your skin. Wires connect the electrodes to a computer or an EKG machine that records the electrical activity in your heart during the stress test.</p>
</li>
<li>
<p><strong>If you're unable to exercise:</strong> An intravenous (IV) line will be inserted into a vein in your arm. You'll get medicine through the IV. The medicine will make your heart work harder for 10 to 20 minutes while an EKG records your heart's electrical activity. Medicine can be used instead of exercise for all types of stress tests.</p>
</li>
<li>
<p><strong>If you can exercise:</strong> You'll walk on a treadmill or ride a stationary bicycle. On a treadmill, the speed will slowly increase. The treadmill may also tilt so you feel like you're walking uphill. On a bicycle, the resistance will slowly increase, so it's harder to pedal.</p>
You'll exercise for about 10 to 15 minutes until you reach a target heart rate based on your age and fitness level. But you may stop the test sooner if:
<br/><br/>
<ul>
<li>You develop chest pain, shortness of breath, dizziness, <a data-tid="5324" href="https://medlineplus.gov/fatigue.html">fatigue</a> or other symptoms</li>
<li><p>The EKG shows a problem with your heart</p></li>
</ul>
</li>
<li>
<p><strong>After all types of stress tests</strong>, you'll be monitored for 10-15 minutes or until your heart rate returns to normal.</p>
</li>
</ul>
<p>Stress tests with pictures include <strong>stress echocardiograms</strong>, <strong>nuclear stress tests</strong>, and <strong>cardiac (heart) <a data-tid="3953" href="https://medlineplus.gov/mriscans.html">MRI</a> stress tests</strong>. These tests have extra steps:</p>
<p><strong>A stress echocardiogram</strong> or "echo" takes moving pictures of your heart using <a data-pid="3552" href="https://medlineplus.gov/lab-tests/doppler-ultrasound/">doppler ultrasound</a>. The pictures show the size and shape of your heart and blood flow through your heart. Pictures will be taken before and after your heart has worked its hardest. You'll lie on your left side on a table as a provider moves an ultrasound device on your chest. If you exercise on a bicycle, the second set of pictures may be taken while you're pedaling.</p>
<p><strong>A nuclear stress test</strong> takes pictures of your heart using a small amount of a radioactive substance called a "tracer" and a special camera that scans your heart. A provider injects the tracer into your bloodstream through an IV line that's placed in a vein. Your heart and blood vessels absorb the tracer, which makes them show up more clearly in the pictures.</p>
<p>Pictures are taken while you lie on a table before and after your heart has worked its hardest. After the test, the tracer naturally leaves your body in your urine (pee). Drinking lots of water will help remove it faster.</p>
<p><strong>A cardiac MRI stress test</strong> takes the most detailed pictures of your heart using radio waves, magnets, and a computer. It is a newer test that's mostly used for very serious heart problems. For an MRI stress test:</p>
<ul>
<li>
<p>A provider <em>may</em> inject dye into your bloodstream through an IV line placed in your arm. Some cardiac MRIs, but not all, use dye to help show very small details on the pictures.</p>
</li>
<li>
<p>Pictures of your heart may be taken before and after your heart has worked hard. To take the pictures, you'll lie on a table that slides into a large, tunnel-like MRI machine. You'll hear loud sounds as the machine takes pictures. If you're exercising for the test, you may use a treadmill near the MRI, or you may exercise while lying in the MRI machine using special devices to move your arms or legs.</p>
</li>
</ul></div>
</section>
<section><div class="mp-content"><h2>Will I need to do anything to prepare for the test?</h2>
<p>Wear comfortable shoes and clothing for exercise. Your provider will tell you what else to do before a stress test. You'll usually need to fast (not eat or drink) and stop smoking for at least a few hours before the test. You may need to avoid drinks with caffeine, such as coffee, tea, and colas, for a longer period of time.</p>
<p>If you take medicines or supplements, ask your provider if you should take them as usual. Don't stop taking any medicine unless your provider tells you to. If your test uses MRI, tell your provider about any metal you have in your body. An MRI can heat certain metal and cause burns.</p></div>
</section>
<section><div class="mp-content"><h2>Are there any risks to the test?</h2>
<p>Stress tests are usually safe. You will be closely watched during the test. If a problem develops, you'll be treated quickly. Medicines that make your heart work harder sometimes cause symptoms such as chest pain, dizziness, or <a data-tid="489" href="https://medlineplus.gov/nauseaandvomiting.html">nausea</a>. An IV may bruise your arm.</p>
<p>The tracers and dyes used in nuclear and MRI stress tests may cause an <a data-tid="5603" href="https://medlineplus.gov/drugreactions.html">allergic reaction</a>, but this is rare. If you are or could become <a data-tid="5578" href="https://medlineplus.gov/pregnancyandmedicines.html">pregnant</a> or are breastfeeding, talk with your provider before you have these tests.</p></div>
</section>
<section><div class="mp-content"><h2>What do the results mean?</h2>
<p><strong>A normal test result</strong> means no blood flow problems were found. Your heart is working well.</p>
<p><strong>If your test result was not normal</strong>, it may mean you have heart disease. Ask your provider to explain what condition you may have. You may need more tests to find out how serious your condition is.</p>
<p>Learn more about <a data-pid="806" href="https://medlineplus.gov/lab-tests/how-to-understand-your-lab-results/">laboratory tests, reference ranges, and understanding results</a>.</p></div>
</section>
<section><div class="mp-refs mp-content"><h2>References</h2>
<ol>
<li>Advanced Cardiology and Primary Care [Internet]. Advanced Cardiology and Primary Care LLC; c2021. Stress Testing; [cited 2022 Oct 24]; [about 3 screens]. Available from: <a href="https://www.advancedcardioprimary.com/cardiology-services/stress-testing" target="bibliowin">https://www.advancedcardioprimary.com/cardiology-services/stress-testing</a></li>
<li>American Heart Association [Internet]. Dallas (TX): American Heart Association Inc.; c2022. Exercise Stress Test; [reviewed 2015 Jul 31; cited 2022 Oct 24]; [about 4 screens]. Available from: <a href="https://www.heart.org/en/health-topics/heart-attack/diagnosing-a-heart-attack/exercise-stress-test" target="bibliowin">https://www.heart.org/en/health-topics/heart-attack/diagnosing-a-heart-attack/exercise-stress-test</a></li>
<li>American Heart Association [Internet]. Dallas (TX): American Heart Association Inc.; c2022. Non-Invasive Tests and Procedures; [reviewed 2015 Jul 31; cited 2022 Oct 24]; [about 4 screens]. Available from: <a href="https://www.heart.org/en/health-topics/heart-attack/diagnosing-a-heart-attack/noninvasive-tests-and-procedures" target="bibliowin">https://www.heart.org/en/health-topics/heart-attack/diagnosing-a-heart-attack/noninvasive-tests-and-procedures</a></li>
<li>Cleveland Clinic: Health Library: Diagnostics &amp; Testing [Internet]. Cleveland (OH): Cleveland Clinic; c2022. Cardiac MRI Adenosine Stress Test; [reviewed 2019 Feb 12; cited 2022 Nov 5]; [about 7 screens]. Available from: <a href="https://my.clevelandclinic.org/health/diagnostics/16839-cardiac-mri-adenosine-stress-test" target="bibliowin">https://my.clevelandclinic.org/health/diagnostics/16839-cardiac-mri-adenosine-stress-test</a></li>
<li>Cleveland Clinic: Health Library: Diagnostics &amp; Testing [Internet]. Cleveland (OH): Cleveland Clinic; c2022 Exercise Stress Test; [reviewed 2022 Jan 17; cited 2022 Nov 5]; [about 15 screens]. Available from: <a href="https://my.clevelandclinic.org/health/diagnostics/16984-exercise-stress-test" target="bibliowin">https://my.clevelandclinic.org/health/diagnostics/16984-exercise-stress-test</a></li>
<li>Cleveland Clinic: Health Library: Diagnostics &amp; Testing [Internet]. Cleveland (OH): Cleveland Clinic; c2022.Nuclear Cardiac Stress Test; [reviewed 2022 May 31; cited 2022 Nov 5]; [about 10 screens]. Available from: <a href="https://my.clevelandclinic.org/health/diagnostics/17276-nuclear-cardiac-stress-test" target="bibliowin">https://my.clevelandclinic.org/health/diagnostics/17276-nuclear-cardiac-stress-test</a></li>
<li>Craven TP, Tsao CW, La Gerche A, Simonetti OP, Greenwood JP. Exercise cardiovascular magnetic resonance: development, current utility and future applications. J Cardiovasc Magn Reson. 2020 Sep 10 [cited 2022 Nov 5];22(1):65. doi: 10.1186/s12968-020-00652-w. PMID: 32907587; PMCID: PMC7488086. Available from: <a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7488086/" target="bibliowin">https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7488086/</a></li>
<li>Heart Care Center of Northwest Houston [Internet]. Houston(TX): The Heart Care Center, Board Certified Cardiologists. What Is a Treadmill Stress Test?; [cited 2022 Oct 24]; [about 3 screens]. Available from: <a href="https://www.theheartcarecenter.com/contents/diagnostic-testing/stress-tests/treadmill-stress-test" target="bibliowin">https://www.theheartcarecenter.com/contents/diagnostic-testing/stress-tests/treadmill-stress-test</a></li>
<li>Mayo Clinic [Internet]. Mayo Foundation for Medical Education and Research; c1998-2022. Echocardiogram: Overview; [cited 2022 Oct 24]; [about 8 screens]. Available from: <a href="https://www.mayoclinic.org/tests-procedures/echocardiogram/about/pac-20393856" target="bibliowin">https://www.mayoclinic.org/tests-procedures/echocardiogram/about/pac-20393856</a></li>
<li>Mayo Clinic [Internet]. Mayo Foundation for Medical Education and Research; c1998-2022. Electrocardiogram (ECG or EKG): Overview; [cited 2022 Oct 24]; [about 7 screens]. Available from: <a href="https://www.mayoclinic.org/tests-procedures/ekg/about/pac-20384983" target="bibliowin">https://www.mayoclinic.org/tests-procedures/ekg/about/pac-20384983</a></li>
<li>Mayo Clinic [Internet]. Mayo Foundation for Medical Education and Research; c1998-2022. Stress test: Overview; [cited 2022 Oct 24]; [about 7 screens]. Available from: <a href="https://www.mayoclinic.org/tests-procedures/stress-test/about/pac-20385234" target="bibliowin">https://www.mayoclinic.org/tests-procedures/stress-test/about/pac-20385234</a></li>
<li>Mayo Clinic [Internet]. Mayo Foundation for Medical Education and Research; c1998-2022. Nuclear stress test: Overview; [cited 2022 Oct 24]; [about 8 screens]. Available from: <a href="https://www.mayoclinic.org/tests-procedures/nuclear-stress-test/about/pac-20385231" target="bibliowin">https://www.mayoclinic.org/tests-procedures/nuclear-stress-test/about/pac-20385231</a></li>
<li>Merck Manual Consumer Version [Internet]. Kenilworth (NJ): Merck &amp; Co., Inc.; c2022. Stress Testing; [revised 2021 Jul; cited 2022 Oct 24]; [about 2 screens]. Available from: <a href="https://www.merckmanuals.com/home/heart-and-blood-vessel-disorders/diagnosis-of-heart-and-blood-vessel-disorders/stress-testing" target="bibliowin">https://www.merckmanuals.com/home/heart-and-blood-vessel-disorders/diagnosis-of-heart-and-blood-vessel-disorders/stress-testing</a></li>
<li>National Heart, Lung, and Blood Institute [Internet]. Bethesda (MD): U.S. Department of Health and Human Services; Coronary Heart Disease; [updated 2022 Mar 24; cited 2022 Oct 24]; [about 5 screens]. Available from: <a href="https://www.nhlbi.nih.gov/health/coronary-heart-disease" target="bibliowin">https://www.nhlbi.nih.gov/health/coronary-heart-disease</a></li>
<li>National Heart, Lung, and Blood Institute [Internet]. Bethesda (MD): U.S. Department of Health and Human Services; Heart Tests; [updated 2022 Mar 24; cited 2022 Nov 4]; [about 21 screens]. Available from: <a href="https://www.nhlbi.nih.gov/health/heart-tests" target="bibliowin">https://www.nhlbi.nih.gov/health/heart-tests</a></li>
<li>UF Health: University of Florida Health [Internet]. Gainesville (FL): University of Florida Health; c2022. Exercise stress test: Overview; [reviewed 2020 Jul 30; cited 2022 Oct 24]; [about 4 screens]. Available from: <a href="https://ufhealth.org/exercise-stress-test" target="bibliowin">https://ufhealth.org/exercise-stress-test</a></li>
<li>UF Health: University of Florida Health [Internet]. Gainesville (FL): University of Florida Health; c2022. Nuclear stress test: Overview [reviewed 2020 Jun 25; ; cited 2022 Oct 24]; [about 5 screens]. Available from: <a href="https://ufhealth.org/nuclear-stress-test" target="bibliowin">https://ufhealth.org/nuclear-stress-test</a></li>
<li>UF Health: University of Florida Health [Internet]. Gainesville (FL): University of Florida Health; c2022. Stress echocardiography: Overview; [reviewed 2020 Jan 27; cited 2022 Oct 24]; [about 4 screens]. Available from: <a href="https://ufhealth.org/stress-echocardiography" target="bibliowin">https://ufhealth.org/stress-echocardiography</a></li>
<li>UR Medicine: Highland Hospital [Internet]. Rochester (NY): University of Rochester Medical Center; c2022. Cardiology: Cardiac Stress Tests; [cited 2022 Oct 24]; [about 3 screens]. Available from: <a href="https://www.urmc.rochester.edu/highland/departments-centers/cardiology/tests-procedures/stress-tests.aspx" target="bibliowin">https://www.urmc.rochester.edu/highland/departments-centers/cardiology/tests-procedures/stress-tests.aspx</a></li>
<li>UR Medicine: Highland Hospital [Internet]. Rochester (NY): University of Rochester Medical Center; c2022. Cardiology: Nuclear Stress Tests; [cited 2022 Oct 24]; [about 4 screens]. Available from: <a href="https://www.urmc.rochester.edu/highland/departments-centers/cardiology/tests-procedures/stress-tests/nuclear-stress-test.aspx" target="bibliowin">https://www.urmc.rochester.edu/highland/departments-centers/cardiology/tests-procedures/stress-tests/nuclear-stress-test.aspx</a></li>
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