Heart failure explained simply

Understanding heart failure

Heart failure does not mean the heart has stopped, and it does not mean nothing more can be done. It means the heart muscle is not pumping, or not filling, as effectively as the body needs — a long-term condition that can usually be managed, often for many years, with the right care.

The heart is a muscular pump with four chambers. The two lower chambers, the ventricles, do most of the pumping work — the left sends oxygen-rich blood to the whole body, the right sends blood to the lungs to collect oxygen. Heart failure happens when this pump either weakens (it cannot squeeze out enough blood with each beat) or stiffens (it cannot relax and fill properly between beats). Either way, the body does not receive as much blood as it needs during activity, and blood can back up behind the weakened chamber — into the lungs if the left side is affected, or into the legs, abdomen and veins if the right side is affected. This is why breathlessness and swelling are the two hallmark symptoms.

Heart failure is not one disease but a syndrome with many possible causes, including coronary artery disease, long-standing high blood pressure, valve disease, disease of the heart muscle itself (cardiomyopathy), and persistent rhythm problems. Identifying the underlying cause matters, because treatment often targets it directly rather than the symptom alone.

What heart failure feels like

People experience heart failure differently, and symptoms often build gradually rather than appearing all at once. These are useful clues to discuss with a clinician, not a checklist for diagnosing yourself.

• ●Breathlessness during activity that once felt easy, or when lying flat, easing when you sit up
• ●Waking at night short of breath, or needing extra pillows to sleep comfortably
• ●Tiredness and reduced ability to exercise or manage daily tasks
• ●Swelling of the ankles, legs or abdomen, often worse by evening
• ●Rapid weight gain over a few days, from fluid retention rather than food
• ●A persistent cough, wheeze, or reduced appetite
• ●A fast or irregular heartbeat alongside these symptoms

What causes heart failure

Heart failure is usually the end result of another condition placing long-term strain on the heart. Grouping the common causes can help you see where your own history might fit.

Coronary artery disease

Narrowed arteries reduce blood flow to the heart muscle itself; over time, or after a heart attack, part of the muscle can be permanently weakened.

High blood pressure

Very common in Nigeria and often undiagnosed, sustained high blood pressure forces the heart to pump against constant extra resistance. Over years, the muscle can thicken and then tire, a common route into heart failure.

Valve disease

A heart valve that leaks or is too narrow forces the heart to work harder to move the same amount of blood, eventually straining the pumping chambers.

Cardiomyopathy

Disease of the heart muscle itself — from infection, pregnancy-related change, long-standing rhythm problems, alcohol, some chemotherapy drugs, or causes that are never fully identified — can weaken the pump directly.

Rhythm problems

A heart rate that stays abnormally fast for weeks or months, if unrecognised, can itself weaken the heart's pumping ability over time.

Who is more likely to develop heart failure

• ●High blood pressure — very common in Nigeria and often undiagnosed
• ●Diabetes
• ●A previous heart attack or known coronary artery disease
• ●Anaemia, common in Nigeria, which forces the heart to work harder to deliver oxygen
• ●Obesity and a largely sedentary lifestyle
• ●Heavy or long-term alcohol use
• ●A family history of heart failure or cardiomyopathy
• ●Increasing age
• ●Chronic kidney disease

What happens if heart failure goes untreated

With appropriate treatment, many people with heart failure live full, active lives for years. Left unrecognised or untreated, the strain tends to progress.

Worsening symptoms. Breathlessness, swelling and fatigue tend to increase, gradually limiting daily activity and independence.

Kidney and liver strain. Reduced blood flow and back-pressure from a struggling heart can affect kidney and liver function over time.

Rhythm problems. A strained heart is more prone to dangerous rhythm disturbances.

Hospital admission. Fluid build-up that is not caught early is one of the most common reasons for emergency hospital admission in people with heart failure — which is why daily self-monitoring matters so much.

How Cardiocare finds the cause

The right pathway depends on your symptoms, examination and overall health. It typically draws on some or all of the following:

• 01
  History and examination. Your symptoms, their pattern, and an examination checking your pulse, blood pressure, lungs, and for swelling.
• 02
  Blood tests. Including markers that rise when the heart is under strain, alongside kidney function, blood count and thyroid tests.
• 03
  ECG (electrocardiogram). A painless recording of the heart's electrical activity, taking minutes.
• 04
  Echocardiogram. A painless ultrasound scan that shows the heart's chambers, valves and pumping strength — usually the key test that confirms heart failure and helps identify its type.
• 05
  Chest imaging. To look for fluid in or around the lungs and assess heart size.
• 06
  Coronary assessment. Where coronary artery disease is a possible cause, further testing or angiography may be recommended.
• 07
  Rhythm evaluation. Where a rhythm problem is suspected as a cause or complication.

How heart failure is treated

Treatment aims to ease symptoms, slow progression and address the underlying cause — most people need a combination of approaches, adjusted over time.

Lifestyle

Reducing salt intake, monitoring fluid intake as advised, daily weight checks, staying as active as your care team recommends, and limiting alcohol all support the heart's ability to cope.

Medicines, by class

Several classes of medicine work together to protect the heart, and your clinician will discuss the right combination and dose for you:

• ●ACE inhibitors or ARBs — relax blood vessels and reduce the pressure the heart pumps against
• ●Beta blockers — slow and steady the heartbeat, reducing strain over time
• ●Diuretics ("water tablets") — help the body clear excess fluid, easing breathlessness and swelling
• ●Mineralocorticoid receptor antagonists — a further class shown to protect the heart in many patients
• ●SGLT2 inhibitors — originally developed for diabetes, now also used to protect the heart in many people with heart failure

Procedures and devices

For selected patients, procedures available through Cardiocare's on-site cardiac catheterisation laboratory or surgical service may help:

• ●Coronary angioplasty or bypass surgery — where narrowed arteries are a significant contributing cause
• ●Valve repair or replacement — where valve disease is driving the strain
• ●Implantable devices — including devices that support heart rhythm or coordinate the heart's pumping, for selected patients

Living with heart failure: everyday self-care

Daily habits make a genuine difference to how well heart failure is controlled:

• ✓Take prescribed medicines consistently, even when you feel well — stopping suddenly can cause symptoms to rebound
• ✓Weigh yourself at the same time each day and tell your team about rapid gain, as your team advises
• ✓Reduce salt in cooking and be cautious with the salt and seasoning cubes common in Nigerian cooking
• ✓Track breathlessness, swelling and energy levels, and note changes for your appointments
• ✓Ask before using herbal products, and avoid anti-inflammatory painkillers unless your clinician approves them — several can worsen fluid retention
• ✓Connect with patient support resources through Cardiocare — ask your care team what is currently available
• ✓Keep vaccinations up to date as advised, since infections can worsen heart failure

Preparing for your appointment

What to bring

• ✓A list of all medicines you take, including herbal and over-the-counter preparations
• ✓Any previous ECGs, echocardiogram reports or hospital letters
• ✓A record of your daily weights if you have been tracking them
• ✓Your HMO card and a valid means of identification

What we will ask

How your breathlessness, swelling and energy have changed, how well you are managing your medicines, and what a typical day looks like for you now compared with before symptoms began.

Questions worth asking us

• ●What is the likely cause of my heart failure?
• ●Which medicines am I on, and what does each one do?
• ●What symptoms should prompt me to contact you before my next visit?
• ●What activity level is safe and helpful for me?