Tuesday, 4 September 2012

Hypotension - What Is It, Causes and Treatment

In physiology and medicine, hypotension is abnormally low blood pressure condition. This is not a disease, but rather a physiologic state. The opposite is hypertension. Blood pressure is the force of blood gushing through the walls of the arteries as the heart pumps out blood. When the pressure is below 90/60 mm Hg, which is considered low, this condition is known as hypotension.

Blood pressure is continuously regulated by the autonomic nervous system, using an elaborate networks of receptors, nerves and hormones to balance the effects of the Sympathetic nervous system, which tends to raise BP, and the parasympathetic nervous system, which lowers the BP. The vast and rapid compensation abilities of the autonomic nervous system allow normal people to keep up an acceptable pressure over a range of activities and emotions.

Symptoms of hypotension: The symptoms of hypotension is light-headedness or dizziness. If the pressure is too low, fainting and seizures will occur. Among others,low BP or hypotension is associated with the following symptoms, which are not effects of hypotension, rather related to causes of low pressure. a] Chest pain b] shortness of breath c] high fever d] stiff neck e]foul-smelling urine.

Causes: Low pressure causes, can be due to, among others, 1] Hormonal changes 2] widening of the blood vessels 3] Medicine side effects 4] Heart and endocrine problems

Types: 1] Orthostatic hypotension, also known as 'postural hypotension', is common. It occurs when the body changes its position, after a while, like standing up from a seated or lying position. Even antidepressants can have this side effect. If there is a drop of 20/10 mm Hg in BP, this will show hypotension. 2] Another, but very rare type is called postprandial hypotension, which occurs 30-60 minutes after eating a substantial meal. Here a huge quantity of blood is diverted to the intestines, thus negating blood to other vital parts, such as brain.

Treatment: The treatment for hypotension depends on its cause. Adding electrolytes to a diet can relieve symptoms of mild hypotension. For rare and severe cases hospitalization is recommended.

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