A to Z: Tachycardiaenparentshttps://kidshealth.org/EN/images/headers/P-khAZDictionary-enHD-AR1.jpgLearn more about types of arrhythmias and problems of the heart.tachycardia, heartbeat, heart, ventricular tachycardia, supraventricular tachycardia, dizziness, fainting, heart disease, high blood pressure, syncope, arrhythmia, rapid heart rate, atria, ventricles, sinus node11/26/201203/18/201909/02/20190af116e7-b6aa-44eb-9198-e1fcc89bd99dhttps://kidshealth.org/ws/RadyChildrens/en/parents/az-tachycardia.html/<p><em>May also be called: Rapid Heart Rate; Rapid Heartbeat</em></p> <p>Tachycardia (tak-ih-KAR-dee-uh) is an abnormally rapid heartbeat.</p> <h3>More to Know</h3> <p>The <a href="https://kidshealth.org/ws/RadyChildrens/en/parents/heart.html/">heart</a> has its own electrical system that controls the heart rate and contraction of the heart, which pumps blood throughout the body. Normal heart rates vary based on a person's age.</p> <p>A rapid heart rate can be caused by many different factors. Sometimes tachycardia is the body's&nbsp;response to a trigger like <a href="https://kidshealth.org/ws/RadyChildrens/en/parents/fever.html/">fever</a>, anxiety, exercise, or pain, just to name a few. It also can be due to an abnormal rhythm in the heart (called a dysrhythmia), such as supraventricular tachycardia (SVT).</p> <p>Congenital heart abnormalities, high blood pressure, medications, <a href="https://kidshealth.org/ws/RadyChildrens/en/parents/dehydration.html/">dehydration</a>, caffeine, smoking, and recreational drug use also can cause tachycardia. Tachycardias can lead to dizziness, shortness of breath, chest pain, fainting, and heart palpitations (a sensation of feeling the heart beat fast or irregularly). Some tachycardias are life threatening and can lead to blood clots, causing a stroke, heart failure, and sudden death.</p> <h3>Keep in Mind</h3> <p>Most tachycardias resolve without causing any problems. However, some require immediate medical attention and can be life threatening if they're not treated. Be sure to talk to your doctor if you are concerned about tachycardia or its related symptoms.</p> <p><em>All A to Z dictionary entries are regularly reviewed by KidsHealth medical experts.</em></p>
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
Heart MurmursHeart murmurs are very common, and most are no cause for concern and won't affect a child's health.https://kidshealth.org/ws/RadyChildrens/en/parents/murmurs.html/9e6ab8dd-2a20-40ab-8625-3e956311e737
Heart and Circulatory SystemThe heart and circulatory system are our body's lifeline, delivering blood to the body's tissues. Brush up on your ticker with this body basics article.https://kidshealth.org/ws/RadyChildrens/en/parents/heart.html/52398b6a-54a6-4272-a569-42ed5b12aeac
The HeartYour heart beats and sends oxygen throughout your entire body. Find out how it works and how heart problems can be fixed.https://kidshealth.org/ws/RadyChildrens/en/kids/center/heart-center.html/d4cb468c-ba42-454a-94bf-4173f8e15a69
Words to Know (Heart Glossary)Your heart beats and sends blood all around your body. Find out more about the heart, from A to Z, in this glossary.https://kidshealth.org/ws/RadyChildrens/en/kids/heart-glossary.html/74e2184d-3790-4839-9d2f-9a0fc99c1279
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-dictionarykh:primaryClinicalDesignation-cardiologyCardiology A to Zhttps://kidshealth.org/ws/RadyChildrens/en/parents/dictionary/az-cardio/04be85fa-f4f5-44c2-a321-21821f326c6aThttps://kidshealth.org/ws/RadyChildrens/en/parents/dictionary/t/43c185a2-6bf4-4283-b27b-c17577050c89