Functional premature beats are generally benign premature beats, and those with less than 5 beats are sporadic premature beats, which generally do not affect the blood volume and blood supply of the heart and have little impact on health. If more than 6 beats per minute is called frequent premature beats, it may generally be accompanied by a decrease in blood volume, resulting in insufficient blood supply to important organs such as heart, brain and kidney. Such as chest tightness, palpitation, dizziness and fatigue. If this kind of premature beat happens to a person with severe heart disease, it may lead to heart failure or other serious conditions soon. Therefore, once the above symptoms appear, you should go to the hospital for examination and diagnosis.
There are individual differences in the harm of premature beats. Once premature beats are found, you should immediately go to the hospital for ECG and dynamic ECG detection to eliminate the cause of organic heart disease, actively eliminate all kinds of incentives and relieve symptoms.
Normal people will have premature beats. But patients with cardiac neurosis and organic heart disease are more likely to occur. Emotional excitement, tension, fatigue, indigestion, excessive smoking, drinking alcohol or strong tea can all cause seizures, or there is no obvious inducement. The toxic effects of digitalis, barium, quinidine, sympathomimetic drugs, chloroform, cyclopropane anesthetic, potassium deficiency, heart surgery or cardiac catheterization can all be caused. Coronary heart disease, advanced mitral valve disease, heart disease, myocarditis, hyperthyroidism heart disease, mitral valve prolapse and so on are often prone to premature beats.
It can be produced in many ways.
1. Abnormal impulse formation caused by abnormal self-discipline
1. In some cases, such as Weidensky phenomenon, when sinus impulse reaches ectopic pacing point, the threshold potential at this point decreases and the slope of diastolic depolarization changes, which leads to premature beats.
2. The membrane permeability of diseased atria, ventricles or Purkinje fibers to different ions changes, making fast-reaction fibers become slow-reaction fibers, accelerating automatic depolarization in diastolic phase, enhancing self-discipline and producing premature beats.
Sinus impulse reaches ectopic pacing point, which makes the threshold potential level move down, so diastolic depolarization of ectopic pacing point reaches threshold potential before basal rhythm pacing point, causing premature beats.
Second, the turn-back phenomenon.
If the reentry path is the same, the premature beat mode of circular reentry or local micro reentry is the same. If the conduction velocity during reentry is the same, the pairing time of premature beat and previous beat is fixed.
Third, arouse excitement.
Premature beats can also be divided into functional and organic. Functional premature beats are more common in healthy people or children without organic heart disease. It is often caused by overwork, mental stress, indigestion, emotional excitement or unstable autonomic nervous system, and often disappears due to exercise or accelerated heart rate. Organic premature beats are caused by some diseases, such as myocarditis, rheumatic heart disease, congenital heart disease, electrolyte disorder, digitalis poisoning, acute infection and so on. When exercise or heart rate increases, premature beats usually increase.
Functional premature beats often caused by overwork, mental stress, indigestion, emotional excitement or autonomic nervous system instability are generally benign premature beats, and those with less than 5 beats are occasional premature beats, which generally do not affect the blood output and blood supply of the heart and have little impact on health. If more than 6 beats per minute is called frequent premature beats, it may generally be accompanied by a decrease in blood volume, resulting in insufficient blood supply to important organs such as heart, brain and kidney. Such as chest tightness, palpitation, dizziness and fatigue. If this kind of premature beat happens to a person with severe heart disease, it may lead to heart failure or other serious conditions soon. Therefore, once the above symptoms appear, you should go to the hospital for examination and diagnosis.
There are individual differences in the harm of premature beats. Once premature beats are found, you should immediately go to the hospital for ECG and dynamic ECG detection to eliminate the cause of organic heart disease, actively eliminate all kinds of incentives and relieve symptoms.