OverviewTachycardia (tak-ih-KAHR-dee-uh) is the medical term for a heart rate over 100 beats a minute. Many types of irregular heart rhythms (arrhythmias) can cause tachycardia. Show A fast heart rate isn't always a concern. For instance, the heart rate typically rises during exercise or as a response to stress. Tachycardia may not cause any symptoms or complications. But if left untreated, some forms of tachycardia can lead to serious health problems, including heart failure, stroke or sudden cardiac death. Treatment for tachycardia may include specific maneuvers, medication, cardioversion or surgery to control a rapid heartbeat. TypesThere are many different types of tachycardia. Sinus tachycardia refers to a typical increase in the heart rate often caused by exercise or stress. Other types of tachycardia are grouped according to the part of the heart responsible for the fast heart rate and the cause. Common types of tachycardia caused by irregular heart rhythms (arrhythmias) include:
Mayo Clinic Minute: Identifying and treating atrial fibrillationMayo Clinic electrophysiologist Fred Kusumoto, M.D., explains what happens in the heart to create atrial fibrillation and what can be done to fix it. MODERATOR: This is a normal heartbeat. [HEART BEATING] Atrial fibrillation interrupts this regular beat. FRED KUSUMOTO, M.D.: "In atrial fibrillation, instead of the atria squeezing in a normal regular fashion, the atria beat irregularly and chaotically." MODERATOR: Dr. Fred Kusumoto is an electrophysiologist at Mayo Clinic. FRED KUSUMOTO, M.D.: "In some cases people feel their heart palpitating or beating very, very fast or a flip-flop in their heart or chest area. Other times, people just notice that they're more short of breath when they walk upstairs." MODERATOR: Dr. Kusumoto says atrial fibrillation decreases the heart's blood pumping efficiency and puts a patient at higher risk for blood clots, heart failure, and stroke. In some cases, atrial fibrillation can be corrected with medication or by administering a shock to a sedated patient's heart. In other instances, a procedure called catheter ablation may be used to scar tissue that's creating the erratic signals--[HEART BEATING]-- in the hopes of getting back to that normal beat. SymptomsWhen the heart beats too fast, it may not pump enough blood to the rest of the body. As a result, the organs and tissues may not get enough oxygen. In general, tachycardia may lead to the following signs and symptoms:
Some people with tachycardia have no symptoms. The condition may be discovered when a physical exam or heart tests are done for another reason. When to see a doctorA number of things can cause a rapid heart rate (tachycardia). If you feel like your heart is beating too fast, make an appointment to see a health care provider. Seek immediate medical help if you have shortness of breath, weakness, dizziness, lightheadedness, fainting or near fainting, and chest pain or discomfort. A type of tachycardia called ventricular fibrillation can cause blood pressure to drop dramatically. Collapse can occur within seconds. Soon the affected person's breathing and pulse will stop. If this occurs, do the following:
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email communications at any time by clicking on the unsubscribe link in the e-mail. CausesTachycardia is an increased heart rate for any reason. It can be a usual rise in heart rate caused by exercise or a stress response (sinus tachycardia). Sinus tachycardia is considered a symptom, not a disease. Tachycardia can also be caused by an irregular heart rhythm (arrhythmia). Things that may lead to tachycardia include:
Sometimes the exact cause of tachycardia can't be determined. How does the heart beat?To understand the cause of tachycardia, it may be helpful to know how the heart typically works. The heart is made of four chambers — two upper chambers (atria) and two lower chambers (ventricles). The heart's rhythm is controlled by a natural pacemaker (the sinus node) in the right upper chamber (atrium). The sinus node sends electrical signals that normally start each heartbeat. These electrical signals move across the atria, causing the heart muscles to squeeze (contract) and pump blood into the ventricles. Next, the signals arrive at a cluster of cells called the AV node, where they slow down. This slight delay allows the ventricles to fill with blood. When the electrical signals reach the ventricles, the chambers contract and pump blood to the lungs or to the rest of the body. In a typical heart, this heart signaling process usually goes smoothly, resulting in a resting heart rate of 60 to 100 beats a minute. Risk factorsIn general, growing older or having a family history of certain heart rhythm problems (arrhythmias) may increase the risk of arrhythmias that commonly cause tachycardia. Lifestyle changes or medical treatment for related heart or other health conditions may decrease the risk of tachycardia. ComplicationsComplications of tachycardia depend on:
Some people with tachycardia have an increased risk of developing a blood clot that could cause a stroke (risk is highest with atrial fibrillation) or heart attack. Your health care provider may prescribe a blood-thinning medication to help lower your risk. Other potential complications of tachycardia include:
PreventionThe best ways to prevent tachycardia are to maintain a healthy heart and prevent heart disease. If you already have heart disease, monitor it and follow your treatment plan. Be sure you understand your treatment plan, and take all medications as prescribed. Lifestyle changes to reduce the risk of heart disease may help prevent heart arrhythmias that can cause tachycardia. Take the following steps:
What is heart rate per minute with heart attack?While no one particular heart rate qualifies as a heart attack, a rapid heart rate outside 60 to 100 beats per minute should be monitored closely. Doctors cannot say that a particular heart rate qualifies as a heart attack. Your heart rate is not a reliable indicator that you are having a heart attack.
What heart rate is an emergency?If you're sitting down and feeling calm, your heart shouldn't beat more than about 100 times per minute. A heartbeat that's faster than this, also called tachycardia, is a reason to come to the emergency department and get checked out. We often see patients whose hearts are beating 160 beats per minute or more.
Is 120 bpm a heart attack?Go to your local emergency room or call 911 if you have: New, unexplained, and severe chest pain that comes with shortness of breath, sweating, nausea, or weakness. Fast heart rate (more than 120-150 beats per minute, or a rate noted by your doctor) -- especially if you are short of breath.
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How many beats per minute is considered a heart attack
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