It often results from damage to the heart’s electrical pathways caused by coronary heart disease and ageing. Conduction block or heart block: This is when there is a block or delay in the heart’s electrical pathways that causes the signals that trigger heartbeats to slow or stop.This grows more common with age, but it can also be caused by coronary heart disease. Sick sinus syndrome: In this condition, the sinus node in the heart (the natural pacemaker of the heart that sets the pace of the heartbeat) does not work properly, and the heart rate may alternate between too slow and too fast.Types of bradycardia include the following. This only becomes problematic if the heart beats so slowly that it cannot pump enough blood to meet the body’s needs. In a physically fit person, the heart may still be able to pump enough blood to the body even with fewer than 60 beats per minute when at rest. A slow heart rate does not necessarily indicate a problem. It can cause a sharp drop in blood pressure and is often triggered by a heart attack.īradycardia is a slow heartbeat, where the resting heart rate is less than 60 beats per minute. This type usually has links to cardiovascular disease and can be life-threatening. Ventricular fibrillation: In this type, the ventricles quiver instead of contracting to pump blood, resulting in a rapid, uncoordinated and fluttering heart rhythm.Atrial flutter: This is similar to atrial fibrillation, but the abnormal heart rhythm has a more consistent pattern.While in itself it may not be dangerous, it is important to screen for atrial fibrillation and treat it because it increases the risk of other conditions, such as heart failure and stroke. It can remain undetected for long periods of time. It may not cause any symptoms, or the symptoms may only occur some of the time. Atrial fibrillation: This is the most common type of tachycardia, where the heart beats in a rapid, irregular way.The irregular heartbeat conditions that are classed as tachycardia include the following: This can often happen if the heart is damaged from a previous heart attack. The rapid heart rate does not allow the ventricles to properly fill with blood, and as a result, the heart cannot pump enough blood to the body. Ventricular tachycardia: This type occurs when there are faulty electrical signals within the ventricles, and it can be very dangerous.It can cause bursts of a rapid but rhythmically regular heartbeat that can last for a few seconds to a few hours.
Supraventricular tachycardia: This type covers irregular heartbeats that start in the atria or AV node, above the lower chambers of the heart (ventricles).The two main types of tachycardia are the following. Tachycardia is a fast heartbeat, where the resting heart rate is greater than 100 beats per minute. A normal resting heart rate is regular, with a rate usually between 60 to 100 beats per minute. In general, the types of irregular heartbeat can be grouped by the speed of the heart rate. Physical activity, stress, or even caffeine and nicotine can cause an increase in premature beats. While some heart diseases can cause these beats, most of the time they are harmless. Everyone experiences these extra beats occasionally, but most people do not notice them. These are extra beats that occur singly or can occur in patterns alternating with the normal heartbeat. The most common type of irregular heartbeat is premature heartbeats.
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