Supraventricular Tachycardia (SVT)enparentshttps://kidshealth.org/EN/images/headers/Cardiology_Supraventricular_Tachycardia_enHD_1.jpgSupraventricular tachycardia is a type of abnormal heart rhythm in which the heart beats very quickly. Supraventricular Tachycardia, SVT, tachycardia, ventricular, superventricular, supraventricular, resting EKG, EKG, ECG, cardio, cardiology, cardiologist, cardiac, arrhythmia, arrhythmias, heart beat, Holter, heartbeat, fast heartbeat, heart racing, atria, stress test, radiofrequency ablation, radiofrequency, ablation, cryoablation, catheter ablation, catheter, palpitations, sinus node, beta blockers05/17/201812/04/201912/04/2019Joel D. Temple, MD and Shashank P. Behere, MD05/10/2018fe5b0af6-4f7a-4fc8-a5f0-67c3f8fcccebhttps://kidshealth.org/ws/RadyChildrens/en/parents/supraventricular-tachycardia.html/<h3>What Is Supraventricular Tachycardia (SVT)?</h3> <p>Supraventricular tachycardia (SVT) is a type of arrhythmia (abnormal heart rhythm) in which the heart beats very quickly.</p> <p>The abnormal heart rhythm starts in the <strong>atria</strong>, which are the top chambers of <a href="https://kidshealth.org/ws/RadyChildrens/en/parents/heart.html/">the heart</a>. Supraventricular tachycardia&nbsp;(soo-pruh-ven-TRIK-yuh-ler tak-ih-KAR-dee-uh)&nbsp;often happens suddenly and can last for a few minutes or many hours.</p> <h3>What Happens in Supraventricular Tachycardia (SVT)?</h3> <p>An area in the atria called the <strong>sinus node</strong> sends electrical signals that tell the heart to beat at a normal rate. They also tell the heart to speed up during exercise or times of stress, and to slow down during sleep.</p> <p>Normally, the electrical signals follow set paths from the heart's top chambers down to its bottom chambers (the <strong>ventricles</strong>). In people with SVT, the signals can sometimes &quot;short circuit&quot; and make the heart beat faster.<img class="right" title="" src="https://kidshealth.org/EN/images/illustrations/SVT_a_enIL.jpg" alt="Illustration: SVT" /></p> <p>SVT causes the heart to work harder to do its job, especially if it goes on for a long time. Longer episodes can make the heart tired and not able to pump normally.</p> <p>How long episodes last and how often they happen is different for each person with SVT.</p> <h3>What Are the Signs &amp; Symptoms of Supraventricular Tachycardia (SVT)?</h3> <p>Some kids with SVT have no symptoms at all. When they do, palpitations (a feeling of a fast heartbeat or pounding in the chest) are the most common.</p> <p>Other symptoms might include:</p> <ul> <li>dizziness</li> <li>tiredness</li> <li>weakness</li> <li>shortness of breath</li> <li>chest pain</li> <li><a href="https://kidshealth.org/ws/RadyChildrens/en/parents/fainting-sheet.html/">fainting</a></li> </ul> <h3>What Causes Supraventricular Tachycardia (SVT)?</h3> <p>SVT can be congenital, which means a child is born with it. Or SVT can develop later in life. Sometimes SVT happens because of other heart conditions.</p> <h3>Who Gets Supraventricular Tachycardia (SVT)?</h3> <p>Supraventricular tachycardia usually affects infants, young kids, and teens.</p> <h3>How Is Supraventricular Tachycardia (SVT) Diagnosed?</h3> <p>Doctors use several tools to diagnose SVT. It's very important for parents to know their child's medical history &nbsp;and give this information to the doctor.</p> <p>The doctor will do a physical exam and order an <a href="https://kidshealth.org/ws/RadyChildrens/en/parents/ekg.html/">electrocardiogram</a> (EKG or ECG) to measure the heart's electrical activity. These types of EKGs might be done:</p> <ul> <li><strong>resting EKG</strong>, which measures the heart rate and rhythm, and takes less than a minute</li> <li><strong>exercise EKG</strong> (also called a <strong>stress test</strong>), which measures heart rate and rhythm during exercising, like riding a stationary bicycle or walking on a treadmill</li> <li><strong>home monitor</strong>, which is an EKG done over a longer period. It monitors the heart's rhythm during normal daily activities. <strong>Continuous recording</strong> (usually 24 hours with a &quot;Holter&quot; monitor) means the EKG is on for the entire monitoring period; <strong>event monitoring</strong> (usually done for 30–60 days) means data is recorded only when a child feels symptoms and presses a button, or when the monitor detects certain conditions.</li> </ul> <h3>How Is Supraventricular Tachycardia (SVT) Treated?</h3> <p>Many arrhythmias like SVT may not need treatment.</p> <p>Treatment might be done&nbsp;when SVT causes symptoms, lasts a long time, or happens often. Options include:</p> <p><strong>Medicine.</strong> Doctors may use medicines (such as beta blockers) that slow the heart rate. This lowers the chances of having frequent or long episodes of SVT. Sometimes, these cause side effects, so a child will see his or her doctor regularly.</p> <p><strong>Catheter ablation </strong> <strong>.</strong> With the child asleep and comfortable, a catheter (a thin, flexible plastic wire) is guided through a vein or artery in the leg to the heart. When the problem area of the heart is pinpointed, the catheter tip can use hot energy (called <strong>radiofrequency ablation</strong>) or cold energy (called <strong>cryoablation</strong>) to destroy the tissues causing the arrhythmia.</p> <h3>Looking Ahead</h3> <p>Most children with SVT lead a normal life. It's important to follow up with the cardiologist as often as needed.</p>Taquicardia supraventricularLa taquicardia supraventricular es un tipo de arritmia (ritmo cardíaco anormal), donde el corazón late o bombea muy deprisa.https://kidshealth.org/ws/RadyChildrens/es/parents/supraventricular-tachycardia-esp.html/4766ea95-b86f-4cc1-8e69-c15027518224
Arrhythmia (Abnormal Heartbeat)An arrhythmia is an abnormal heartbeat usually caused by an electrical "short circuit" in the heart. Many are minor and not a health threat, but some can indicate a more serious problem.https://kidshealth.org/ws/RadyChildrens/en/parents/arrhythmias.html/19038a47-2ae4-48f8-8bd5-9e46150171b0
ArrhythmiasArrhythmias are abnormal heartbeats usually caused by an electrical "short circuit" in the heart. Many are minor and not a significant health threat, but others can indicate a more serious problem.https://kidshealth.org/ws/RadyChildrens/en/teens/arrhythmias.html/79184e00-417e-4ce4-a49b-2e89de1b1bd4
Atrial Septal DefectAtrial septal defect, or ASD, is a heart defect that some people are born with. Most ASDs are diagnosed and treated successfully with few or no complications.https://kidshealth.org/ws/RadyChildrens/en/teens/asd.html/109626e5-a3cb-4cba-a44d-947c86de3a81
Atrial Septal Defect (ASD)Atrial septal defect (ASD) — also known as a "hole in the heart" — is a type of congenital heart defect. Most ASDs are diagnosed and treated successfully.https://kidshealth.org/ws/RadyChildrens/en/parents/asd.html/2853e7be-1368-420f-bc8d-134350949604
ECG (Electrocardiogram)Is your child scheduled to have an ECG? Find out how this test is performed and when you can expect the results.https://kidshealth.org/ws/RadyChildrens/en/parents/ekg.html/3b7f9c4b-b77a-4c15-b95a-6e44bc873875
EKG (Video)This video shows what it's like to have an electrocardiogram (EKG for short).https://kidshealth.org/ws/RadyChildrens/en/teens/video-ekg.html/33217804-bedd-4b29-9ba0-5e5539cdb783
Getting an EKG (Video)Getting an EKG doesn't hurt and it gives doctors important info about how your heart is beating. Watch what happens in this video for kids.https://kidshealth.org/ws/RadyChildrens/en/kids/video-ekg.html/0a1abc9f-625f-43ff-84a2-abcdc4fb2826
Heart MurmursEveryone's heart makes sounds, but some people have hearts that make more noise than others. Usually, however, these heart murmurs don't mean anything is wrong. Find out more about these mysterious murmurs.https://kidshealth.org/ws/RadyChildrens/en/kids/heart-murmurs.html/38913fec-cf94-4522-b3c2-985ecb0f0db6
Heart and Circulatory SystemThe heart and circulatory system (also called the cardiovascular system) make up the network that delivers blood to the body's tissues.https://kidshealth.org/ws/RadyChildrens/en/teens/heart.html/fde8120a-c54e-4e57-94b8-fb4375c29487
Ventricular Septal DefectVentricular septal defect, or VSD, is a heart condition that a few teens can have. Find out what it is, how it happens, and what doctors do to correct it.https://kidshealth.org/ws/RadyChildrens/en/teens/vsd.html/840c44ec-78bd-4e55-ae74-37dcf68a1407
Ventricular Septal Defect (VSD)Ventricular septal defect (VSD) — also known as a "hole in the heart" — is a congenital heart defect. Most VSDs are diagnosed and treated successfully.https://kidshealth.org/ws/RadyChildrens/en/parents/vsd.html/21135699-6b44-43bd-96b1-618186631849
Words to Know (Heart Glossary)A guide to medical terms about the heart and circulatory system. In an easy A-Z format, find definitions on heart defects, heart conditions, treatments, and more.https://kidshealth.org/ws/RadyChildrens/en/parents/heart-glossary.html/ba52d6b8-f516-479b-b2de-ad634d6053da
Your Heart & Circulatory SystemYour heart is a hard-working muscle. Find out more in this article for kids.https://kidshealth.org/ws/RadyChildrens/en/kids/heart.html/9730472f-2ef1-413a-92bf-041c533b9564
kh:age-allAgesOrAgeAgnostickh:clinicalDesignation-cardiologykh:genre-articlekh:primaryClinicalDesignation-cardiologyHeart & Blood Vesselshttps://kidshealth.org/ws/RadyChildrens/en/parents/medical/heart/e9ef0549-4392-4778-974d-753019ce4b8bHeart Loop Recorderhttps://kidshealth.org/ws/RadyChildrens/en/parents/heart-loop-recorder/0d202e5c-85a7-4718-9abd-2ad0765188b3Heart Conditionshttps://kidshealth.org/ws/RadyChildrens/en/parents/hearthealth/heartconditions/ba7116cf-3c46-4896-8429-8be5c439795ehttps://kidshealth.org/EN/images/illustrations/SVT_a_enIL.jpg