Do you know what an arrhythmia is? The reason why the heart keeps beating rhythmically is that there is an olive-like tissue called sinus node under the epicardium in the right atrium of the heart near the entrance of the superior vena cava, which gives out impulses to firmly control the beating of the whole heart, ensuring that the heart beats regularly 60 to 100 times per minute in normal people. When the heart loses this regularity, it is called an arrhythmia. Patients often experience panic attacks, irregular heartbeats, missed heartbeats, chest tightness or even more serious symptoms such as fainting or sudden death. Arrhythmias are arguably the most common form of heart disease, and they occur at one time or another throughout a person’s life. An arrhythmia can be a fast heartbeat of more than 100 beats per minute, a slow heartbeat of less than 60 beats per minute, or a disorganized heartbeat that loses its regular rhythm and becomes irregular or erratic. The specific type of arrhythmia can usually be determined by an electrocardiogram or 24-hour ambulatory electrocardiogram. If it is difficult to identify the type of arrhythmia, electrodes can be connected to the blood vessels and heart chambers to perform electrophysiological examination of the heart, which can often lead to a clear diagnosis. What symptoms may indicate an arrhythmia? Palpitations and panic are the most common symptoms in patients with arrhythmias. Whether it is a tachyarrhythmia or a slow arrhythmia, the rhythm or (and) frequency of the heartbeat has changed significantly, and the patient has a subjective feeling of “heavy heartbeat”, “heart beating out of the throat”, “heart stopping”, or “heart beating randomly”. “, “heart is beating randomly” and so on. In addition, significant changes in rhythm or (and) frequency can cause a decrease in cardiac blood output, resulting in insufficient blood supply to important organs such as the heart and brain. Patients may have ischemic and hypoxic symptoms such as chest tightness, dizziness, head swelling, fatigue and weakness, and in severe cases, they may even experience syncope. Therefore, all of the above symptoms suggest that the patient may have arrhythmias and should be examined accordingly. Are arrhythmias common? Arrhythmias are a very common occurrence. Almost everyone has had an arrhythmia. The incidence of arrhythmias becomes greater as we get older. In the human heart, the rhythm and frequency of the heartbeat are dominated by excitation from the sinus node in the commander. The heart also has a conduction system that is responsible for transmitting the commands from the sinus node to all parts of the heart. An arrhythmia occurs when there is a change in the point of excitation of the heart or a change in the conduction of impulses from the sinus node, resulting in an abnormality in the heart rhythm and/or heart rate. Arrhythmias are very common throughout life, especially premature beats. There are many different types of arrhythmias, so which arrhythmia patient needs catheter ablation? This often depends on whether the patient has a family history of heart disease, syncope, sudden death, and the severity of the arrhythmia.