Low Blood Pressure
Pressure of blood in the arteries is described as the blood pressure. This pressure, if continuously low is called hypotension.
Hypotension occurs when the sustained systolic pressure of blood is 120 mmhg or less and diastolic pressure of 80 mmhg or less is measured in a rested state. Blood pressure is calculated in millimeters of mercury or mmhg
The circulation of blood is a closed system in the body where the pressure constantly varies and it reaches its peak when the heart contracts with the heartbeat. With each contraction, blood is pumped out of the heart and this is referred to as the systolic pressure. The heart relaxes allowing the heart chambers to fill with blood again. The pressure between given two heartbeats is referred to as diastolic blood pressure.
When blood pressure becomes too low the result is an improper and inadequate flow of blood to the vital organs in the body as well as the brain. Symptoms include a feeling of light headedness sometimes resulting in a person fainting. Though blood pressure tends to vary during the day, the normal acceptable range is 90/60 mmhg. But when it goes below 90/60 mmhg it is defined as hypotension. Some people may have orthostatic hypotension where a feeling of light headedness or even fainting occurs when a person stands up suddenly.
Symptoms of low blood pressure (hypotension) include nausea, palpitation, blurred vision, dizziness, loss of consciousness, general weakness and fatigue. Various parts of the body may become cold especially the palms, feet and forehead.
Some causes of Hypotension are: dehydration, fainting, loss of blood, diarrhea, severe infection related to heart and heart attack, irregular heartbeat, heart failure, diabetic neuropathy, severe allergic reaction as well as shock due to internal bleeding, adverse effect of medicines like diuretics calcium blockers, nitrates, anti-depressants for treatments of hypertension as well as certain anesthetic drugs may also cause hypotension. Some people experience pregnancy related low blood pressure which must be carefully monitored by a physician.
If hypotension is persists especially with any heart related disorder then medication may be necessary. Taking enough fluids to maintain hydration is generally recommended. Your physician will guide you through this process.