Causes
Heart failure is usually the end result of other conditions that damage or overwork the heart muscle:- Coronary artery disease: Narrowed heart arteries and prior heart attacks are the leading cause; see coronary artery disease.
- Long-standing high blood pressure: Years of pumping against elevated pressure thicken and stiffen the heart muscle.
- Valve problems: Leaky or narrowed heart valves force the heart to work harder; see valvular heart disease.
- Diseases of the heart muscle: Conditions described under cardiomyopathy, including damage from viral infections or excess alcohol.
- Rhythm problems: A persistently rapid rhythm such as atrial fibrillation can weaken the heart over time.
- Other contributors: Diabetes, obesity, sleep apnea, and certain chemotherapy medications also raise the risk. Finding and treating these contributors is part of a complete heart-failure plan.
Symptoms
Symptoms often develop gradually and are easy to blame on age or being out of shape:- Shortness of breath: With activity, when lying flat, or waking you from sleep at night.
- Swelling (edema): In the feet, ankles, legs, or abdomen as fluid accumulates.
- Rapid weight gain: Several pounds over a few days usually reflects retained fluid, not fat.
- Fatigue and weakness: Everyday tasks feel harder because muscles receive less oxygen-rich blood.
- Persistent cough or wheezing: Sometimes with white or pink-tinged mucus from fluid in the lungs.
Diagnosis
Your physician will listen to your heart and lungs, check for swelling, and order tests: a blood test called BNP that rises when the heart is under strain, an electrocardiogram, a chest X-ray, and an echocardiogram. The echocardiogram measures the ejection fraction — the percentage of blood pumped out with each beat — which distinguishes heart failure with reduced ejection fraction (a weak pump) from heart failure with preserved ejection fraction (a stiff pump). Identifying which type is present matters, because it guides which medications will help most.Treatment
Modern therapy can relieve symptoms, keep people out of the hospital, and help many live longer:- Diuretics: Water pills such as furosemide relieve congestion by helping the kidneys remove excess fluid.
- ACE inhibitors: Medications such as lisinopril relax blood vessels and reduce the heart's workload.
- Beta-blockers: Medications such as carvedilol and metoprolol slow the heart and help the muscle recover strength.
- SGLT2 inhibitors: Medications such as dapagliflozin and empagliflozin improve outcomes in both major forms of heart failure.
- Aldosterone antagonists: Medications such as spironolactone provide additional protection in selected patients.
- Daily habits: Limiting sodium, weighing yourself every morning, staying active, and avoiding excess alcohol are essential parts of treatment, and many patients benefit from a written action plan describing what to do when weight or symptoms change.
When to Seek Immediate Care
Call 911 for severe shortness of breath at rest, chest pain, or fainting. Contact your physician promptly for weight gain of more than two to three pounds overnight or five pounds in a week, or worsening swelling. Heart failure requires careful, ongoing medication adjustment and monitoring. The internal-medicine team at Zimmer Medical Group manages heart failure in partnership with cardiology, keeping treatment on track between specialist visits. More patient resources are available from MedlinePlus.Living Well With Heart Failure
Heart failure is a diagnosis people hear as a verdict, and it is better understood as a condition with a treatment plan that works remarkably well when it is followed in full. The difference between the patients who stay out of the hospital and those who cycle through it usually comes down to a handful of practical points.
Four medications, not one, and taken at target doses
For heart failure with a weak pump, four classes of medication each independently lengthen life: a renin-angiotensin blocker such as lisinopril or the newer sacubitril-valsartan combination, a beta-blocker such as carvedilol or metoprolol, an aldosterone antagonist such as spironolactone, and an SGLT2 inhibitor such as dapagliflozin or empagliflozin. The goal is all four, each raised to the studied dose over a few months. Feeling well is the treatment working, not a reason to drop one, and a beta-blocker in particular is expected to make you feel slightly worse for a few weeks before it makes you better.
A stiff heart is treated differently
Heart failure with preserved ejection fraction, where the heart is stiff rather than weak, accounts for about half of cases and until recently had no medication shown to help. SGLT2 inhibitors now do, and the rest of treatment focuses on the conditions driving it: high blood pressure, atrial fibrillation, obesity, and sleep apnea, which is present in a large share of people with heart failure and often untreated.
Sodium, fluid, and the scale
Most heart failure programs advise staying under about 2,000 mg of sodium a day, and the bulk of it comes from restaurant and packaged food rather than added salt. A written plan that says what to do when your morning weight rises, typically an extra diuretic dose and a phone call, prevents many admissions. Ask for one if you do not have it.
Medications and illnesses that tip the balance
Ibuprofen and naproxen cause fluid retention and can undo a week of diuretic treatment in a few days. Decongestants, some diabetes drugs, and certain calcium channel blockers also worsen heart failure, so every new prescription and over-the-counter purchase deserves a check. A stomach illness with vomiting or diarrhea can turn a normal diuretic dose into dehydration and kidney injury, and sustained Florida heat does the same more slowly; lightheadedness on standing in either situation warrants a call rather than a wait.
Activity, vaccines, and follow-up
Supervised exercise training is safe in stable heart failure and improves symptoms and quality of life, and Medicare covers cardiac rehabilitation for many people with a reduced ejection fraction. Influenza, COVID-19, and pneumococcal vaccination matter more than usual, because respiratory infection is a common trigger for decompensation. The early signs of heart failure article helps family members recognize a slow decline. Our cardiovascular team adjusts medications between cardiology visits. The American Heart Association and NHLBI publish self-care guidance and symptom diaries.
If you are not on all four medication classes, do not have a written weight plan, or have been admitted in the past year, schedule a visit.