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why does my heart beat fast and then slow

What If Your Heart Races? The normal heart averages between 60 and 100 beats per minute. When your heart beats faster than this, you have a condition called. When your heart races, itБs working too hard. It doesnБt have enough time to fill with
or pump it to the rest of your body. You might have heart palpitations or. You may also feel dizzy or faint. If you have or some types of, your chances of having tachycardia could be higher than normal. If you were born with an abnormal heart structure, this is called a congenital heart defect, and it might increase your odds as well. Other factors, like fever, or drinking too much, can also make your heart race. Your doctor may suggest medical treatment if your heart races too often or it lasts too long. In the meantime, he might recommend the following things to slow it down: Cut back on or Close your If you faint, have, or have chest pain that lasts longer than a few minutes, talk to your doctor right away or call 911. Sometimes our hearts beat slower than 60 beats per minute.

This is called. For some people, like athletes and healthy, young adults, this heart rate could be normal. But for others, it could be a sign that your and other organs arenБt getting enough oxygen to function like they should. If thatБs the case, you may feel faint, dizzy, weak, or short of breath. You might also have chest pains, memory problems, or tire easily. Bradycardia is caused by a problem with your heartБs electrical system. Your heart simply isnБt getting the signal to beat properly. This can happen for some or all of the following reasons: Damage to heart tissue from age or Congenital heart problems, which are present from birth An Inflammatory disorders, such as Medications for heart problems, or Supraventricular tachycardia (SVT) is a heart condition featuring episodes of an abnormally fast heart rate. ThePheart willPsuddenly start racing, then stop racing or slow down abruptly. Episodes can last for seconds, minutes, hours or (in rare cases) days.

TheyPmay occur regularly, several times a day,Por very infrequently, once or twice a year. The heart rate may be as high as 250 beats per minute, but is usually between 140 and 180 (aPnormal heartbeat should be 60-100 beats per minute at rest). 'Supraventricular' means that the problem occurs in the upper chambers (atria) of the heart. 'Tachycardia' means an abnormally rapid heart rhythm. P When the heart beats normally, its muscular walls contract (tighten and squeeze) to force blood out and around the body. They then relax, so the heart can fill with blood again. This process is repeated for every heartbeat. In SVT,Pthe heart muscle is contracting so fast that itPcannot relax between contractions. This reduces the amount of blood being pumped around the body, which can make you feel dizzy and short of breath. You usually feelP (noticeable heartbeats) and a fast pulse. P SVT is caused by abnormal electrical impulses that start suddenly in the upper chambers of your heart (the atria).

ThesePimpulses override your heart's natural rhythm. ItPis often a short circuit in the electrical system of your heart that causes these spontaneous impulses. The short circuitPcauses an electrical signal to travel continuously around in a circle. Each time the signal completes the circuit, the impulse spreads out to the rest of your heart, forcing it to beat rapidly. SVT attacks often happen for no obvious reason. However, they may be triggered by a change in posture, exertion, emotional upset, coffee or alcohol. SVT can occur in anyone at any age, but it often occurs for the first time in children or young adults. In the vast majority of cases, attacks of SVT are harmless, do not last long andPsettle on their own without treatment. If necessary, SVTPcan be treated with drugs that correct the abnormal heart rate. It can also bePpermanently treated with a very effectivePsurgical procedure called catheter ablation, which interrupts the abnormal electrical circuits.

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