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A sphygmomanometer, which includes an inflatable arm cuff linked to a mercury column and a calibrated scale, is utilized to assess blood pressure. John Rensten / Getty ImagesThe heart functions as an extraordinary pump, operating efficiently for years and safely circulating blood, one of the most complex fluids. Similarly, blood vessels act as pipelines, distributing the heart's output throughout the body. A blood pressure gauge serves as a tool to evaluate the efficiency of both the pump and the pipelines.
Blood pressure readings include two values: systolic and diastolic. For instance, a common reading might be 120/80. When a doctor wraps the cuff around your arm and inflates it, they temporarily halt blood flow using the cuff's pressure. As the cuff's pressure decreases, blood flow resumes, and the doctor detects it using a stethoscope. The first audible flow corresponds to the heart's peak pressure (systolic reading, e.g., 120). The doctor continues releasing pressure until no sound is heard, indicating the system's pressure when the heart is at rest (diastolic reading, e.g., 80).
Elevated numbers indicate that the heart is overworking due to obstructions in the blood vessels. Hormones such as adrenaline, released during stress, can constrict blood vessels, increasing blood pressure. Chronic stress leads to sustained high blood pressure, forcing the heart to labor excessively. Additional factors like arterial plaque buildup and reduced vessel elasticity with age can also elevate blood pressure.
Persistent high blood pressure may lead to heart failure from overexertion or kidney failure due to excessive pressure.
Here are some interesting links:
- How Blood Works
- How Your Heart Works
- How Your Kidneys Work
- Sphygmomanometer
- How is Blood Pressure Tested?
- Blood Pressure Testing and Measurement
- Blood Pressure Test
