It is called beat to the knock what causes the alternative contraction and dilation movement of the heart . The heartbeat can be felt in the chest or in the tissues that cover the arteries.
To pump the blood , the heart makes a continuous movement of systole (contracts to expel blood) and diastole (It dilates to allow fluid to enter), as do the arteries. This action affects as blows that are possible to detect by touch, with sight and especially through the ear, especially in the pectoral area. These blows are the beats.
It can be said that the beats reveal that the heart is functioning. When a person He dies, his heart stops beating.
The regular succession of contraction and dilation is known as heart rate , which must be maintained within certain parameters to be considered normal. This assumes that the heart performs a certain amount of beats per minute that is taken as standard or healthy: if more or less beats are detected, it may be a symptom of some type of disorder or inconvenience of Health , although it depends on whether the subject is at rest or performing a physical activity.
When the beats are too fast, and there are more than a hundred beats per minute, this is a picture of tachycardia . On the other hand, if the beats are very slow, there is talk of bradycardia .
Tachycardia, therefore, is the increase in the frequency of the heartbeat that represents too high a speed in the contraction of the ventricles. It is important to note that the number of beats per minute that is associated with tachycardia requires that the subject be at rest.
With regard to the causes of tachycardia, we can distinguish between physiological and pathological. In the first group are physical efforts and emotions of great intensity, such as fear, stress, anxiety or nervousness for issues that are very difficult to overcome. When, instead, it is a pathological origin it may be linked to insomnia, anemia, hemorrhages, depression , an infection or kidney failure, among other problems.
On the other hand we have the bradycardia , which at first sight is the opposite situation to tachycardia: it supposes an amount of beats per minute less than sixty or that the sinus node stops acting and instead the atrioventricular node arises, to emit a minimum of forty-five and a maximum of fifty five beats per minute.
In general, bradycardia indicates that there is a background heart disease, although it may be symptom of any brain injury. However, other times it may be a sign that alerts us of an imminent heart attack. It does not matter if the subject is an athlete or a young person, an evaluation is recommended to rule out injuries of chemical or infectious origin and also congenital problems.
The alteration of the usual rhythm of the beats is known as arrhythmia . Among the most common causes are potassium insufficiency, a heart attack, congenital diseases, enlarged heart and hyperthyroidism. Regarding its symptoms, we can mention chest pain, fainting, dizziness, dizziness, paleness, difficulty breathing and sweating.
Arrhythmia includes tachycardia and bradycardia, but also a rhythm irregular heartbeats per minute. Broadly speaking, we can say that one of the options is that it does not cause any harm, while it can also be a dangerous situation that must be treated urgently or the sign of some other heart problem.
