Paroxysmal arrhythmias are when the abnormal rhythm starts and stops suddenly.These conditions are related to a specific abnormality in the heart’s electrical system that can lead to fainting or even cardiac arrest External Link. Long QT syndrome, Brugada syndrome and Wolff-Parkinson-White (WPW) syndrome can cause fast and irregular heartbeats.They can arise from the atria or ventricles. Ectopic heartbeats occur when your heart misses a beat or adds an extra beat.Types of heart block include atrioventricular heart block and bundle branch block. It often results from damage to your heart’s electrical pathways. ‘Heart block’ is when there is a block or delay in the electrical signal from your heart’s upper chambers (atria) to its lower chambers (ventricles). It can also cause heartbeats that are too fast or heartbeats that alternate between slow and fast. ‘Sick sinus syndrome’ occurs when the natural pacemaker (sinus node) in your heart malfunctions and ‘fires’ too slowly, telling your heart to beat slowly. However, it can also be caused by heart disorders, such as sick sinus syndrome and heart block. It becomes serious when your heart beats so slowly that it can’t pump enough blood to meet your body’s needs.īradycardia may be normal for you, and some people who do a lot of exercise and are physically fit can have a slower heart rate. Bradycardiaīradycardia is when your heart beats too slowly, generally less than 60 beats per minute. It must be corrected immediately, otherwise it may cause low blood pressure, loss of consciousness and even death. This life-threatening condition occurs when the electrical signal that should trigger your heartbeat behaves erratically. If ventricular tachycardia becomes so severe that the ventricles can’t pump effectively, it can lead to ventricular fibrillation. Ventricular tachycardia happens when the ventricles (the lower chambers) beat too fast, and it’s very dangerous. Common types of supraventricular tachycardia are atrial flutter and atrial fibrillation External Link. Supraventricular tachycardia is not usually life-threatening. The two main types of tachycardia are supraventricular tachycardia (problem with the upper chambers of the heart) and ventricular tachycardia (problem with the lower chambers). Some forms of tachycardia are easily treated and not serious, but others can be life-threatening. Tachycardia is when your heart beats too fast, generally more than 100 beats per minute. Other abnormal rhythms are more serious and can be life-threatening if left untreated.Ībnormal rhythms are classified by their rate and rhythm: fast heartbeat (tachycardia), slow heartbeat (bradycardia) or irregular heartbeat.
Some may cause your heart to skip or add a beat now and again but will usually have no effect on your health or ability to lead a normal life. There are many kinds of abnormal heart rhythms. See your doctor if you have more frequent or consistent palpitations, which may be associated with a serious abnormal heart rhythm. Palpitations may have no obvious cause, but can be triggered by:Īn occasional palpitation that does not affect your general health is not usually something to worry about. Almost everyone has palpitations at some time in their life. It may feel like your heart is racing, thumping, fluttering, pounding or skipping beats. Palpitations are a sensation or awareness of your heart beating. Changes in your heart’s electrical system can cause abnormal heart rhythms External Link, also called ‘arrhythmias’. Sometimes, your heart’s electrical system may not work properly because of heart disease, some medicines, or sometimes for no known reason. In a healthy heart, regular electrical signals cause the heart to contract and relax in a steady rhythm of 60 to 100 beats per minute. Normally, the pumping action of your heart (your heartbeat) is controlled by your heart’s electrical system. Your heart is a muscle that pumps blood, oxygen and important nutrients to all parts of your body.
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