Blood
Circulation: Its Role and Importance
Blood
circulation plays a fundamental role in our overall health, from fighting
infections to delivering oxygen throughout the body, all the way to supporting
brain health.
What is Blood Pressure?
Our heart is
a powerful pump, moving about five litres of blood per minute through our
vessels. When the heart contracts and pushes blood forcefully through the
arteries, it creates what’s known as systolic pressure, the top number
in a blood pressure reading. As the heart relaxes, diastolic pressure is
measured, shown as the bottom number. A blood pressure reading of 140/80, for
example, indicates a systolic pressure of 140 and a diastolic pressure of 80.
Understanding
High Blood Pressure (Hypertension)
Hypertension,
often called the “silent killer,” can go unnoticed in many people, yet it
significantly raises the risk of heart disease and stroke. Observed every year
on May 17, World Hypertension Day raises awareness of this widespread health
issue. Approximately 52% of the population in Pakistan is affected by
high blood pressure, with 42% unaware of their condition.
Fluctuations
in Blood Pressure
Blood pressure can vary throughout the day based on physical activity, stress levels, and other factors.
Rapid rises in blood pressure to 180/120 or higher are considered a hypertensive crisis, requiring immediate medical attention.
Signs and Symptoms of Hypertension
Most people with hypertension don’t show symptoms and may unknowingly live with it. However, when blood pressure rises significantly, symptoms like nosebleeds, headaches, insomnia, anxiety, and breathing issues can appear. Severe cases may present with blurred vision, dizziness, irritability, or, in extreme cases, blood vessel rupture in the brain, potentially leading to unconsciousness or even death.
Potential Causes of High Blood Pressure
As we age,
our blood vessels lose elasticity, requiring the heart to work harder to pump
blood. In 10% of hypertension cases, underlying medical causes—known as
secondary hypertension—are identified, such as kidney diseases, hormonal
imbalances, or excessive alcohol consumption. Contributing factors also include
obesity, smoking, high salt intake, lack of physical activity, diabetes, and
genetic predisposition.
Negative
Impacts of Hypertension
If left
unmanaged, high blood pressure can lead to serious complications, such as heart
failure, stroke, kidney disease, impaired vision, and even rupture of the
aorta, the body’s main artery.
Managing
and Lowering Blood Pressure
Normal blood
pressure is considered 120/80 mmHg or lower. Treatment typically becomes
necessary if readings consistently reach 140/90 mmHg or higher. Specific
dietary choices can help lower blood pressure naturally:
- Bananas: Rich in potassium, bananas can
help balance sodium levels, which benefits blood pressure.
- Oats: High in magnesium, oats are
shown to reduce blood pressure.
- Garlic: Known to prevent blood
clotting and reduce blood pressure when eaten raw daily.
- Beetroot: Packed with nitrates that
relax blood vessels and improve circulation.
- Olive Oil: Contains polyphenols that
support heart health.
- Dark Chocolate: Some studies suggest it can
help lower blood pressure.
Harmful
Foods and Habits for Blood Pressure
Certain
lifestyle habits and foods can worsen high blood pressure:
- High Sodium Intake: Excess salt directly raises
blood pressure.
- Red Meat: Can increase cardiovascular
risk and hypertension.
- Caffeine and Alcohol: May temporarily spike blood
pressure.
Monitoring
and maintaining blood pressure within a healthy range is vital for long-term
well-being.
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