Low Blood Pressure (Hypotension): Causes, Symptoms And ... - Forbes

Blood pressure is the force of blood as it pushes against the walls of the arteries as the heart pumps blood.

For most adults, normal blood pressure is marked by a systolic reading of less than 130 mmHg and a diastolic reading of less than 80 mmHg. Systolic blood pressure (the top number in a blood pressure reading) indicates the force of blood against artery walls during a heartbeat, and diastolic blood pressure (the bottom number in a blood pressure reading) is a measure of the pressure blood exerts on artery walls while the heart rests between beats.

When blood pressure drops below a systolic reading of 90 mmHg and a diastolic reading of 60 mmHg, it can be considered low blood pressure. However, not all blood pressure readings below these levels are automatically a cause for concern.

Furthermore, some people who are accustomed to elevated blood pressure may experience symptoms of hypotension when their blood pressure drops to "normal" levels

What Is Considered Dangerously Low Blood Pressure?

"If blood pressure levels become too low, vital organs may not be receiving blood quickly enough, and the important nutrients [blood carries]—including oxygen—may not be getting to where they need to be in a timely fashion," says Collin Johnston, M.D., a board-certified physician specializing in vascular procedures at Vein Envy in Arizona. This deprivation can lead to shock, coma and even death.

However, the exact level at which such health risks occur can vary from person to person. For example, people who are very physically active and in great shape may naturally have lower blood pressure due to the efficiency of their cardiovascular system, says Dr. Johnston.

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