What Are The Causes of Low Blood Pressure?
Low blood pressure, otherwise known as hypotension in the medical field, is actually a pretty common disease. In order to understand what the causes of low blood pressure are, it is important to tackle what blood pressure is. Blood pressure is defined as the power of blood that pushing against the walls of the blood vessels, specifically the arteries, while the heart pumps blood out. Blood pressure is determined from the systolic and diastolic pressures that are acquired using a sphygmomanometer and a mercury blood pressure gauge, an electronic device or an aneroid manometer. The systolic pressure denotes to the blood pressure that is heard when the heart beats while the diastolic pressure denotes to the blood pressure when the heart is at rest.
The systolic pressure is usually written above the diastolic pressure and the mmHg (millimeters of mercury) is the units utilized in order to measure the blood pressure. Typically, having low blood pressure isn’t always bad. There are people with low blood pressure but portray no signs and symptoms. In other words, having low blood pressure is considered to be a normal occurrence for them. Nevertheless, for people who suffer from abnormally low blood pressure, it is important to get them treatment immediately as it may lead to shock. There are different causes of low blood pressure. Here are some of them:
Low Blood Pressure Causes
1. Medications. There are drugs out there that can lead to low blood pressure as a side effect. Drugs like diuretics, for treatment of hypertension, for Parkinson’s disease and those for erectile dysfunction are known to cause low blood pressure. Beta blockers, tricylic antidepressants, nitroglycerine, narcotics and alcohol are also known to cause low blood pressure as a side effect or adverse effect.
2. Endocrine problems. People suffering from any dysfunction in the hormone-producing glands and organs in the body may experience low blood pressure. This is specifically true for those who have hypothyroidism (an underactive thyroid gland), adrenal insufficiency (Addison’s disease), diabetes, low blood sugar and parathyroid disease.
3. A drop in blood volume. People who are suffering from dehydration or from severe internal bleeding may experience a significant decrease in their blood volume. This, in turn, leads to low blood pressure.
4. Heart problems. People who are diagnosed with heart conditions like bradycardia, heart failure, heart attack and a dysfunction in the heart valves are likely to suffer from low blood pressure. This is due to the fact that the heart may not have enough force to pump the blood in order to meet the body’s allowance.
5. Allergic reaction or anaphylaxis. Anaphylaxis is considered to be a dangerous allergic reaction to drugs, food, and bee or wasp stings. This type often results to a swollen throat, hives, itching, difficulty in breathing and a sudden, extreme drop in blood pressure.
6. Septic shock due to severe infection. Typically, infection only focuses on one area of the body such as the urinary tract, the lungs, the throat or the abdomen. However, there are cases when the bacteria leave these areas and enter the bloodstream. Once there, the bacteria produce toxins. These same toxins influence the blood vessels, which leads to a considerable and dangerous fall in blood pressure.
It is important to be careful when you’re experiencing abnormally low blood pressure. That is the reason why it is best to learn about the causes of low blood pressure in order to prevent it from occurring.
1. Brown, N. (2011), “Low Blood Pressure”, American Heart Association.
2. National Institute of Health, (2010), “What is hypotension?”, National Heart, Lung and Blood Institute.What Are The Causes of Low Blood Pressure?,
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