Overview
Rheumatic heart disease (RHD) is a chronic condition resulting from damage to one or more heart valves following an episode of acute rheumatic fever (ARF). The inflammation caused by ARF can scar the mitral, aortic, tricuspid, or pulmonary valves, leading to stenosis (narrowing) or regurgitation (leakage). Over time, valve dysfunction can cause heart failure, arrhythmias, and reduced quality of life.
Who it affects: RHD primarily affects children and young adults in low‑ and middle‑income countries where streptococcal throat infections are common and access to prompt treatment is limited. It is also reported among Indigenous populations in high‑income nations (e.g., Aboriginal Australians, Native Americans).
Global prevalence: According to the World Health Organization (WHO), more than 39 million people worldwide live with RHD, and an estimated 320,000 deaths occur each year, making it the leading cause of cardiovascular disease in people under 25 years of age in endemic regions [1]. In the United States, prevalence is <0.1 % of the population, but pockets of higher rates exist in marginalized communities [2].
Symptoms
Symptoms may be mild for years and then progress as valve damage worsens. The following list includes the most common manifestations, grouped by system.
Cardiac‑related symptoms
- Shortness of breath (dyspnea): Often first noticed during exertion and later at rest as heart failure develops.
- Chest discomfort or tightness: May occur with angina‑like pain when the heart works harder to pump blood through narrowed valves.
- Palpitations: Irregular heartbeats (atrial fibrillation) are common in advanced mitral valve disease.
- Fatigue and reduced exercise tolerance: The heart’s inability to deliver adequate oxygenated blood leads to early exhaustion.
- Swelling (edema): Typically in the ankles, feet, or abdomen as fluid backs up due to heart failure.
- Heart murmur: A characteristic sound heard by a clinician on auscultation, indicating turbulent flow across a damaged valve.
Systemic symptoms
- Fever or chills: May signal an acute infection (e.g., endocarditis) superimposed on RHD.
- Cough or wheezing: Resulting from pulmonary congestion.
- Weight loss or loss of appetite: Seen in severe, chronic heart failure.
Causes and Risk Factors
RHD does not arise spontaneously; it is a sequela of untreated or inadequately treated group A Streptococcus (GAS) pharyngitis.
Pathophysiology
- Streptococcal throat infection: GAS produces antigens that can trigger an autoimmune response.
- Molecular mimicry: Antibodies mistakenly attack cardiac tissue (especially the valves) because of structural similarity to streptococcal proteins.
- Acute rheumatic fever: Inflammation of the heart, joints, skin, and brain; the cardiac involvement is termed “carditis.”
- Chronic valve scarring: Repeated or severe episodes cause permanent damage, leading to RHD.
Risk factors
- Living in or traveling to regions with high GAS prevalence (Sub‑Saharan Africa, South Asia, Pacific Islands).
- Poor access to primary health care and antibiotics.
- Overcrowded living conditions and low socioeconomic status.
- Family history of rheumatic fever or RHD.
- Age 5–15 years for the initial infection; disease may manifest years later.
- Co‑existing conditions that suppress immunity (e.g., HIV).
Diagnosis
Because early RHD can be silent, a combination of clinical assessment and imaging is essential.
Medical history and physical exam
- Document prior episodes of sore throat, fever, joint pain, or known ARF.
- Listen for murmurs suggestive of mitral or aortic valve disease.
Key diagnostic tests
- Echocardiography (transthoracic or transesophageal): The gold‑standard imaging tool. It visualizes valve morphology, measures gradients, and quantifies regurgitation. Portable handheld echocardiographs are now used in community screening programs [3].
- Electrocardiogram (ECG): Detects atrial fibrillation, conduction blocks, or signs of left‑ventricular hypertrophy.
- Chest X‑ray: May show cardiomegaly or pulmonary congestion.
- Blood tests:
- Complete blood count (CBC) – look for anemia of chronic disease.
- Erythrocyte sedimentation rate (ESR) or C‑reactive protein (CRP) – markers of inflammation during an acute flare.
- Throat culture or rapid antigen test (if recent sore throat) to confirm GAS.
- World Health Organization (WHO) 2012 echocardiographic criteria: Used in epidemiologic studies and for screening school‑age children.
Treatment Options
Management focuses on three pillars: controlling inflammation, preventing further streptococcal infection, and correcting valve damage.
Pharmacologic therapy
- Anti‑inflammatory regimen for acute rheumatic fever:
- High‑dose aspirin (500–1,000 mg every 4–6 h) for 2–4 weeks, then taper.
- Or a short course of oral corticosteroids if arthritis is severe or there is heart failure.
- Secondary prophylaxis (prevention of recurrence):
- Intramuscular benzathine penicillin G 1.2 million units every 3‑4 weeks for ≥10 years or until age 21 (whichever is later), per CDC guidelines [4].
- For penicillin‑allergic patients, monthly intramuscular erythromycin or daily oral erythromycin/azithromycin.
- Heart‑failure medications (if indicated):
- ACE inhibitors or ARBs.
- Beta‑blockers.
- Diuretics for volume overload.
- Spironolactone in selected cases.
- Anticoagulation: Required for patients with atrial fibrillation or mechanical valve prostheses (warfarin with INR 2.0‑3.0, or direct oral anticoagulants when appropriate).
Surgical and interventional procedures
- Valve repair: Preferred when feasible, especially for mitral regurgitation, as it preserves native tissue.
- Valve replacement: Mechanical prostheses (lasting longer but require lifelong anticoagulation) or bioprosthetic valves (limited durability, no anticoagulation needed). Choice depends on age, comorbidities, and access to follow‑up care.
- Balloon valvuloplasty: Catheter‑based dilation of a stenotic mitral valve; useful in selected patients, particularly children, but carries risk of worsening regurgitation.
- Device closure of atrial septal defects (if present) or pacemaker implantation for conduction abnormalities.
Lifestyle and supportive measures
- Low‑sodium diet and fluid management for heart‑failure control.
- Regular, moderate‑intensity aerobic activity as tolerated (e.g., walking, swimming).
- Smoking cessation and avoidance of illicit drugs.
- Vaccinations: influenza, pneumococcal, and COVID‑19 to reduce respiratory infections that can precipitate decompensation.
Living with Rheumatic Heart Disease
Chronic illness management is a partnership between the patient, family, and health‑care team.
Daily self‑care checklist
- Take all medications exactly as prescribed. Carry a written list and use a pill‑box.
- Monitor symptoms: Note any new shortness of breath, swelling, or palpitations and record the date/time.
- Weight‑tracking: A sudden gain of >2 kg in 24 h can signal fluid retention.
- Adhere to prophylactic penicillin injections. Set reminders on a phone or calendar.
- Maintain scheduled follow‑up echocardiograms: Typically every 1‑2 years, or sooner if symptoms change.
- Engage in a heart‑healthy diet: Emphasize fruits, vegetables, whole grains, lean protein, and limit processed foods.
- Stay active within limits: Aim for 150 minutes of moderate activity per week, splitting into 30‑minute sessions.
- Vaccinate annually.
Psychosocial considerations
- Support groups (online or community‑based) can reduce isolation.
- School or workplace accommodations may be needed for fatigue or medical appointments.
- Seek counseling if anxiety or depression develop; chronic heart disease is a known risk factor for mental health disorders.
Prevention
Because RHD is essentially a preventable sequela of GAS infection, primary and secondary prevention are key public‑health strategies.
Primary prevention
- Prompt diagnosis and treatment of streptococcal pharyngitis with a full 10‑day course of oral penicillin V (or a single IM dose of benzathine penicillin).
- Public‑education campaigns emphasizing that sore throats lasting >2 days, fever, and swollen tender neck nodes warrant medical evaluation.
- Improved living conditions: reduce crowding, ensure access to clean water, and enhance school‑based health services.
Secondary prevention
- Long‑term monthly benzathine penicillin G injections (or daily oral prophylaxis if injections are not feasible).
- Education of patients and families on the importance of never missing a dose.
- Community health‑worker programs that deliver injections in remote areas.
Complications
If RHD is left untreated or inadequately managed, several serious complications may arise:
- Heart failure: Progressive valve dysfunction leads to volume or pressure overload.
- Atrial fibrillation: Increases risk of embolic stroke.
- Endocarditis: Bacterial infection of damaged valves; mortality up to 25 % if not treated promptly.
- Thromboembolic events: Stroke, systemic emboli, or pulmonary embolism.
- Pulmonary hypertension: Resulting from chronic left‑heart pressure overload.
- Pregnancy complications: Women with severe RHD face higher risk of maternal heart failure and fetal growth restriction.
When to Seek Emergency Care
Call 911 or go to the nearest emergency department immediately if you experience any of the following:
- Sudden, severe chest pain or pressure that does not improve with rest.
- Rapid heartbeat ( >120 bpm) accompanied by dizziness, fainting, or palpitations.
- Sudden onset of severe shortness of breath at rest or while lying flat.
- Rapid swelling of the legs, abdomen, or face together with a feeling of “tightness” in the chest.
- New or worsening cough with pink frothy sputum (possible pulmonary edema).
- Signs of stroke – facial droop, arm weakness, speech difficulty.
- High fever (>38.5 °C) with chills, especially if you have a known valve prosthesis or recent dental work (possible endocarditis).
[5] American Heart Association, 2023. Guidelines for the Management of Acute Heart Failure.
References
- World Health Organization. Rheumatic heart disease. 2022. https://www.who.int/news-room/fact-sheets/detail/rheumatic-heart-disease
- Cleveland Clinic. Rheumatic heart disease. Updated 2023. https://my.clevelandclinic.org/health/diseases/16478-rheumatic-heart-disease
- Royal College of Paediatrics & Child Health. Screening for rheumatic heart disease with handheld echocardiography. 2021. https://www.rcpch.ac.uk
- Centers for Disease Control and Prevention. Antibiotic Prophylaxis for Rheumatic Fever. 2024. https://www.cdc.gov/groupastrep/rheumatic_fever/prevention.html
- American Heart Association. Acute Heart Failure Management Guidelines. 2023. https://www.heart.org/en/health-topics/heart-failure