Heart Attack vs Heart Failure: Know the Difference — It Could Save Your Life
Share
This is Part 2 of the Purple Cushhh Heart Health Series. Read Part 1 for an overview of heart health in South Africa and how your heart works.
Ask most South Africans to explain the difference between a heart attack and heart failure, and you will likely get a blank stare — or a confident but incorrect answer. The two terms are often used interchangeably, but they describe fundamentally different cardiac events with different causes, different symptoms, and critically, different emergency responses.
Understanding the distinction could save your life — or the life of someone you love.
What Is a Heart Attack?
A heart attack — medically known as a myocardial infarction (MI) — is a plumbing problem. It occurs when blood flow to a section of the heart muscle is suddenly blocked, usually by a blood clot that forms on top of a ruptured atherosclerotic plaque (a buildup of cholesterol and inflammatory material in the coronary artery walls).
When blood flow is cut off, the heart muscle supplied by that artery begins to die. The longer the blockage persists, the more muscle is lost. This is why the phrase "time is muscle" is used in cardiology — every minute without treatment causes irreversible damage.
Heart Attack Warning Signs
The Heart and Stroke Foundation South Africa (HSFSA) identifies the following as the key warning signs of a heart attack. Critically, symptoms can vary significantly between men and women:
Classic symptoms (more common in men):
- Chest pain, pressure, tightness, or squeezing — often described as "an elephant sitting on my chest"
- Pain radiating to the left arm, jaw, neck, or back
- Shortness of breath
- Cold sweats and nausea
- Lightheadedness or sudden dizziness
Atypical symptoms (more common in women, diabetics, and older adults):
- Unusual fatigue — sometimes for days before the event
- Indigestion or upper abdominal discomfort
- Jaw or neck pain without chest pain
- Nausea and vomiting
- Shortness of breath without chest pain
- Anxiety or a sense of impending doom
Important: Women are significantly more likely than men to experience atypical symptoms — and are therefore more likely to delay seeking help or be misdiagnosed. The HSFSA emphasises that any combination of these symptoms warrants immediate emergency response.
What to Do in a Heart Attack Emergency
- Call emergency services immediately: 10177 (ambulance) or 112 (from a mobile phone)
- Do not drive yourself to hospital — call an ambulance
- Chew (do not swallow whole) one adult aspirin (300mg) if available and not contraindicated — this helps prevent further clotting
- Loosen tight clothing and sit or lie in a comfortable position
- Stay calm and keep the person still
- If the person becomes unresponsive and stops breathing normally, begin CPR
The golden window for heart attack treatment is 90 minutes from symptom onset to opening the blocked artery ("door-to-balloon time"). Every minute matters.
What Is Heart Failure?
Heart failure — also called congestive heart failure (CHF) — is an engineering problem. It does not mean the heart has stopped. It means the heart has become too weak or too stiff to pump blood efficiently enough to meet the body's needs.
Heart failure is almost always a chronic, progressive condition that develops over months or years. It is often the end result of long-standing hypertension, previous heart attacks, valve disease, or cardiomyopathy (disease of the heart muscle itself).
According to the HSFSA, hypertension is the leading cause of heart failure in South Africa — making blood pressure management one of the most critical preventive interventions available.
Heart Failure Warning Signs
Unlike a heart attack, heart failure develops gradually. Its symptoms reflect the body's struggle to compensate for a failing pump:
- Breathlessness — initially on exertion, later at rest or when lying flat (orthopnoea)
- Swelling (oedema) in the ankles, feet, and legs — caused by fluid backup
- Persistent fatigue and weakness — the body is not receiving enough oxygenated blood
- Rapid or irregular heartbeat — the heart compensating for reduced output
- Persistent cough or wheezing — fluid accumulating in the lungs
- Reduced ability to exercise — even mild activity causes breathlessness
- Sudden weight gain — from fluid retention (more than 2kg in a week warrants medical attention)
- Nausea and loss of appetite — from reduced blood flow to the digestive system
- Confusion or impaired thinking — in severe cases, reduced brain perfusion
Heart Failure Is Not an Emergency in the Same Way
While acute decompensated heart failure (a sudden worsening) does require emergency care, chronic heart failure is managed over time with medication, lifestyle modification, and — increasingly — targeted nutritional supplementation. We cover this in detail in Part 4 of this series.
Side-by-Side Comparison
| Heart Attack | Heart Failure | |
|---|---|---|
| What it is | Sudden blockage of blood to heart muscle | Chronic weakening of the heart's pumping ability |
| Onset | Sudden — minutes to hours | Gradual — weeks to months |
| Primary cause | Blood clot in coronary artery | Hypertension, previous MI, valve disease |
| Key symptom | Chest pain/pressure | Breathlessness + swelling |
| Emergency? | Yes — call 10177 immediately | Chronic condition; acute worsening = emergency |
| Reversible? | Muscle damage is permanent; treatment limits damage | Manageable; some causes partially reversible |
The Connection Between the Two
It is important to understand that heart attack and heart failure are not mutually exclusive — they are often connected. A significant heart attack damages heart muscle permanently. That damaged muscle weakens the heart's pumping ability. Over time, this can lead to heart failure.
This is why prevention is everything. Preventing a heart attack prevents the cascade of damage that leads to heart failure. And preventing heart failure means aggressively managing the risk factors — hypertension, cholesterol, blood sugar, inflammation — that cause both conditions.
In Part 3 of this series, we look at the natural supplements that have the strongest evidence base for cardiovascular prevention.
Know the Emergency Numbers
- Ambulance (national): 10177
- Emergency (mobile): 112
- Netcare 911: 082 911
- ER24: 084 124
Save these numbers in your phone. Share them with your family. Know where your nearest emergency room is.
This article is for educational purposes only and does not constitute medical advice. In any cardiac emergency, call emergency services immediately. Always consult a qualified healthcare practitioner for personalised cardiovascular health guidance.
Sources: Heart and Stroke Foundation South Africa (heartfoundation.co.za); South African Heart Journal; American Heart Association; European Society of Cardiology.