Blood pressure values below 100/70 mm Hg ( = 133/93 Mbar) are considered hypotension. Hypotonia is the expression for bad control of blood pressure in the brain by the centre. A separate or essential hypotonia is a special form of hypotonia.
Blood pressure values drop to 100/60 mg Hg. The value is constant. This form has different manifestations. Low blood pressure is the consequence of reduced heart ability to force blood proportionately to the length of veins. The said low blood pressure values are not rare. They appear usually in families. Psychic factors, overload, bad nourishment and generally incorrect style of living play an important role. Low blood pressure, felt particularly in the standing position, appears in tall young people, in tall slim persons, in untrained and vegetatively labile adults. Symptoms and problems of the low blood pressure occur due to the fact that a very low blood flow passes through body organs. The hypotonic persons are pale, have cold extremities, concentrate badly, have lack of interest or reluctance, are fatigue in the morning and need more and more sleep, suffer from vertigo, headaches, blurring of vision, sometimes heart failure, heart pressure, sticking round heart, sometimes gastric spasms, and menstruation disorders. Sudden rising to the feet and long standing can result in unconsciousness.
The secondary hypotonia appears in connection with different diseases. This form accompanies infectious diseases, heart diseases, anemia, loss of blood, adrenal gland dysfunction and hypothyroidism.
A special form of hypotonia occurs in sportsmen whose blood circulation waits - after an intensive training - for subsequent high load in the standby mode.
There are also other symptoms, in addition to the low blood pressure: low pulse which can be doubled under load. Certain people do have blood circulation control, which is inevitable while rising to the feet. The affected persons claim that quick rising to the feet and/or long standing leads to the feeling of emptiness in the head, vertigo, blurring of vision, nausea or even unconsciousness. The said phenomena also result from insufficient capillary return.
Unconsciousness is also called loss of consciousness. Usual or banal unconsciousness is the state conditioned by the blood circulation, i.e. consciousness is lost temporarily due to insufficient capillary return in the brain. The usual consciousness is painless and disappears after a few minutes if head of the affected person is put to the low position. Irritation by cold accelerate regaining of consciousness.
Under collapse we understand break-down due to the totally failed blood circulation. Severe failure appears either as the collapse of stress or as collapse after relaxation. In the former case the blood circulation is not in order, e.g. due to heart failure. The vessels are stretched, because they try to compensate drop of the blood pressure. In the latter case, i.e. collapse after relaxation, the blood pressure drops due to general vasodilatation. The banal unconsciousness can be considered the collapse after relaxation. The long-lasting collapse with dropped blood pressure can be converted intothe shock of blood circulation.