Understanding Your Heart: A Complete Guide to Cardiac Health

How Your Heart Works

Your heart is a muscular pump about the size of your fist. It beats approximately 100,000 times per day, moving roughly 7,500 litres of blood through your body every 24 hours. This extraordinary organ sustains every cell and organ in your body.

The heart has four chambers:

• Right atrium and right ventricle — receive deoxygenated blood and pump it to the lungs
• Left atrium and left ventricle — receive oxygen-rich blood from the lungs and pump it to the body

Key Risk Factors for Heart Disease

Cardiovascular disease is the leading cause of death globally. Understanding your risk factors is the first step in prevention:

Modifiable Risk Factors

• High blood pressure (hypertension)
• High cholesterol (dyslipidaemia)
• Type 2 diabetes or pre-diabetes
• Smoking and tobacco use
• Physical inactivity
• Obesity and excess abdominal fat
• Chronic stress and poor sleep

Non-Modifiable Risk Factors

• Age (risk increases over 45 in men, 55 in women)
• Family history of early heart disease
• Genetic conditions (e.g., familial hypercholesterolaemia)

Evidence-Based Steps to Protect Your Heart

1. Know Your Numbers

Have these checked annually:

• Blood pressure: target < 120/80 mmHg
• LDL cholesterol: < 100 mg/dL (or < 70 if you have diabetes)
• Fasting blood glucose: < 100 mg/dL
• BMI: 18.5–24.9

2. Move More

The American Heart Association recommends at least 150 minutes of moderate-intensity aerobic activity per week. Even 30 minutes of brisk walking five days a week significantly reduces cardiac risk.

3. Eat a Heart-Healthy Diet

• Prioritise vegetables, fruits, whole grains, and legumes
• Choose healthy fats (olive oil, nuts, avocado) over saturated fats
• Limit processed foods, red meat, and added sugars
• Reduce sodium intake to < 2,300 mg/day

4. Don’t Smoke — and Avoid Passive Smoke

Smoking is one of the most powerful risk factors for coronary artery disease. The risk of a heart attack drops significantly within just one year of quitting.

5. Manage Stress

Chronic stress elevates cortisol and adrenaline, raising blood pressure and promoting inflammation. Evidence-based strategies include:

• Mindfulness meditation (even 10 minutes/day)
• Adequate sleep (7–9 hours for adults)
• Regular physical activity
• Social connection and support

When to See a Cardiologist

See a cardiologist promptly if you experience:

• Chest pain, pressure, or tightness
• Shortness of breath at rest or with mild exertion
• Palpitations or irregular heartbeat
• Unexplained fatigue or weakness
• Swelling in the legs or ankles
• Dizziness or near-fainting episodes

Emergency Warning Signs: Call 108 immediately if you experience sudden severe chest pain, especially with arm/jaw pain, sweating, and nausea. Time is muscle — every minute matters in a heart attack.

Conclusion

Heart disease is largely preventable. With regular check-ups, a heart-healthy lifestyle, and prompt attention to warning signs, most people can significantly reduce their cardiovascular risk and live a long, active life.

Ready to assess your cardiac health? Book a consultation with our team today.