Hypotension vs Hypertension

Overview

Blood pressure affects energy, heart health, and everyday wellbeing. The two conditions present different health risks so people need to understand their blood pressure levels for proper management. Blood pressure reflects how hard your heart works to circulate blood. It’s measured using two numbers — systolic and diastolic — which reveal how your heart beats and rests. Understanding these values helps detect early signs of heart disease and keep your cardiovascular system healthy. In Australia, approximately one in every three adults has high blood pressure1, yet many remain unaware. Understanding the significance of those two numbers can motivate you to take action.

What Is Blood Pressure?

The measurement of blood pressure reveals how blood pressure affects artery walls through its forceful contact.

Category	Systolic (mmHg)	Diastolic (mmHg)
Low (Hypotension)	< 90	< 60
Normal	90–119	60–79
Elevated (Pre-hypertensive)	120–129	< 80
High (Hypertension Stage 1)	130–139	80–89
High (Hypertension Stage 2)	≥ 140	≥ 90

Why Blood Pressure Matters

1. Supports normal heart and organ function
2. Prevents dizziness, fatigue, or headaches
3. Reduces long-term risks like heart disease and stroke

How Blood Pressure Is Measured

The blood pressure measurement process involves placing a cuff placement around the upper arm followed by inflation and then deflation while taking the reading. The procedure delivers fast results through a painless process.

Understanding “mmHg” (Millimetres of Mercury)

1. The mmHg measurement in your test results represents "millimetres of mercury." The medical field uses this measurement standard for pressure assessment.
2. The blood pressure measurement system used mercury as its pressure indicator during past medical practices.
3. The medical term "mmHg" should not concern you because doctors in Australia and worldwide use this standard measurement.

Understanding the two phases of the heartbeat

Here’s a simple way to understand what’s going on inside your chest:

1. Phase What happens Blood pressure reading
2. Systole The heart contracts (squeezes) and pumps blood out Systolic pressure (the top number)
3. Diastole The heart relaxes and refills with blood Diastolic pressure (the bottom number)

Both readings are vital — systolic shows how forcefully your heart pumps, while diastolic shows how well your arteries relax.

Systolic vs diastolic: What’s the difference?

• Systolic pressure is more closely linked to stroke and heart disease in older adults.
• Diastolic pressure is important in younger people for assessing arterial health.

You need both values to form a complete picture of your heart’s function. The ideal reading for most adults is below 120/80 mmHg.

Blood pressure - Normal vs high vs low

Here’s a reference table of typical categories (in mmHg):

Category	Systolic (mmHg)	Diastolic (mmHg)
Normal	<120	< 80
Elevated	120 - 129	< 80
Hypertension Stage 1	130 - 139	80 - 89
Hypertension Stage 2	≥140	≥90
Hypertensive crisis (urgent)	> 80	> 120

Keeping your blood pressure below 120/80 mmHg can significantly reduce your risk of heart disease, kidney issues, and stroke.

What Is Hypotension (Low Blood Pressure)?

The condition of low blood pressure creates a situation where organs do not receive enough blood circulation which produces various symptoms.

Common Causes

1. Dehydration – common in warm Aussie weather
2. Sudden standing – temporary drop in circulation
3. Medications – some antidepressants or heart meds
4. Pregnancy – vessels naturally relax

Symptoms

1. Dizziness, fainting
2. Blurred vision
3. Tiredness or nausea

Lifestyle Tips

1. Stay hydrated
2. Eat small meals
3. Stand up slowly
4. Avoid long, hot showers

What Is Hypertension (High Blood Pressure)?

Hypertension, also called high blood pressure, occurs when the force exerted by blood flowing through arteries consistently remains raised above normal thresholds, putting strain on blood vessels and the heart. This pressure results from the interactions between the volume of blood pumped and the size and elasticity of the arteries carrying it. Like air in a balloon, higher pressure from increased blood volume or constricted, rigid vessels causes an increase in the force inside the balloon. Just as an overinflated balloon grows strained, chronic hypertension places strain on the arteries, organs and other tissues that depend on receiving vital oxygen-rich blood, increasing the risk of serious diseases like aneurysms, kidney disease and stroke over time.

Types Of Hypertension

Stage 1 Hypertension

When blood pressure readings stay between 130-139 systolic or 80-89 diastolic, a patient is considered to have Stage 1 hypertension. Though it elevates heart disease and stroke odds, a modified lifestyle or medication can help manage the condition.

Stage 2 Hypertension

At 140+ systolic or 90+ diastolic readings, the more severe Stage 2 hypertension sets in. The heightened risk of cardiovascular disease frequently necessitates combined medication and lifestyle shifts to reach safer levels.

Common Causes

1. Ageing and genetics
2. High-salt diet, inactivity, stress
3. Conditions like diabetes or sleep apnoea

Symptoms

1. Usually none
2. Sometimes headaches or shortness of breath

Managing Blood Pressure at Home

• Use a trusted home monitor
• Check at the same time daily
• Rest 5 minutes before testing
• Record readings for your online GP

Exams And Tests

High Blood Pressure

• Pressure Checks: Blood pressure cuff readings
• Daytime Monitoring: 24-hour monitoring
• Home Monitoring: Tracking trends
• ECG and Echocardiogram: Heart function checks
• Other Tests: Cholesterol, kidney function, diabetes screening

Low Blood Pressure

• Pressure Checks: Low readings via cuff
• Postural Changes: Tilt test
• Additional Tests: Blood tests, ECG, echocardiogram

Ongoing monitoring is vital for both conditions.

Prevention tips

Managing high blood pressure:

• Reduce salt intake
• Eat DASH diet
• Exercise 30 minutes daily
• Manage stress
• Limit alcohol
• Quit smoking
• Monitor blood pressure

Managing low blood pressure:

• Stay hydrated
• Increase salt (if advised)
• Compression stockings
• Small frequent meals
• Avoid sudden posture changes

This information is for educational purposes only. You should consult a medical practitioner before attempting home remedies or significant lifestyle changes to ensure they are safe for your specific condition.

When to consult GP

• Frequent headaches, dizziness, chest pain, fatigue, vision changes
• Persistent readings above 140/90 or below 90/60
• Need for personal blood pressure goals

IMPORTANT: If you experience chest pain, severe shortness of breath, sudden weakness, or have a blood pressure reading of 180/120 or higher, call 000 immediately or visit the nearest Emergency Department.

How Hola Health can support

• Online prescriptions and renewals
• Blood pressure medication and monitoring plans
• Medical certificates and referrals
• Same-day consultations and care

While telehealth is a convenient option for managing blood pressure, certain assessments (such as physical heart and lung checks) require an in-person examination. Your medical practitioner may advise if a face-to-face consultation is necessary.

Conclusion

Understanding systolic and diastolic pressure empowers you to take charge of your heart health. Regular monitoring and lifestyle care make a huge difference.

FAQ

What’s the best time to measure blood pressure?

Early morning and evening at consistent times.

Can stress temporarily raise blood pressure?

Yes, stress or stimulants may cause temporary spikes.

Is home monitoring reliable?

Yes, with proper technique and approved devices.

How often should I check my blood pressure?

Depends on your condition and doctor advice.