• An abnormal increase in the size of the left atrium, which is a form of cardiomegaly.

Comment

• It is a clinically significant finding often caused by chronic pressure or volume overload from conditions like mitral valve disease (stenosis or regurgitation) and left ventricular failure.
• It is an independent prognostic marker for adverse cardiovascular events, including atrial fibrillation, stroke, and heart failure.

Citation

• Ahmed, StatPearls, 2025.

• MacCallum’s patches are map-like areas of thickened, roughened endocardium on the posterior wall of the left atrium, characteristic of rheumatic heart disease.
• Punctate calcifications can develop within these patches in long-standing, severe disease.

Comment

• These patches are believed to result from the trauma of a regurgitant blood jet in cases of mitral insufficiency.
• The presence of a calcified MacCallum’s patch is a pathognomonic sign of chronic, severe rheumatic heart disease.

Citation

• Vijaykumar, Journal of Indian Academy of Forensic Medicine, 2013.

• Pericardial effusion is the abnormal accumulation of fluid in the pericardial space (normally contains 10-50 ml).
• Pericardial thickening is an increase in the density of the pericardium itself, which can be distinguished from effusion by CT.

Comment

• The clinical significance depends on the rate of fluid accumulation; rapid accumulation can lead to cardiac tamponade even with small volumes.
• Causes are varied, including inflammatory, infectious, malignant, and post-surgical conditions. Echocardiography is the primary method for diagnosis.

Citation

• Shrestha, Journal of Clinical Medicine, 2022.

• Significant left atrial enlargement can cause external compression of adjacent airways, such as the left mainstem or lower lobe bronchus.
• Ortner’s syndrome, or cardiovocal syndrome, is hoarseness resulting from left recurrent laryngeal nerve palsy due to cardiovascular disease, such as compression by a dilated left atrium.

Comment

• While classically described with severe mitral stenosis, Ortner’s syndrome is now more commonly associated with aortic aneurysms and pulmonary hypertension.
• Airway compression is a direct mass effect, whereas Ortner’s syndrome is a specific neuro-compressive complication.

Citation

• Shah, Cureus, 2021.

• Also known as mucoid impaction, it is the accumulation of inspissated secretions within a bronchus, often leading to bronchial dilation (bronchocele).

Comment

• This finding implies a form of bronchial obstruction, which can be caused by extrinsic compression from an adjacent mass (like an enlarged left atrium) or intrinsic bronchial pathology.
• On imaging, it appears as tubular or branching opacities (“finger-in-glove” sign).

Citation

• Martinez, Radiographics, 2008.

• Rheumatic mitral heart disease (RMHD) is a chronic valvular heart disorder resulting from acute rheumatic fever (ARF).
• Predominantly affects the mitral valve.
• Characterized by progressive fibrotic thickening, leading to valvular stenosis, regurgitation, or both.

• An autoimmune sequela to a group A streptococcal infection, typically pharyngitis.
• Triggers an abnormal immune response.
• Occurs years to decades after the initial streptococcal infection if not adequately treated.

• Autoimmune responses triggered by Group A Streptococcus (GAS) infection.
• Molecular mimicry between GAS antigens and cardiac valve proteins.
• Results in inflammation and damage to the mitral valve.
• Acute rheumatic carditis can manifest as pancarditis, with valvulitis being a primary component.
• Inflammation leads to valvular rigidity and deformity of valve cusps, commissural fusion, and shortening of the chordae tendineae.
• Chronic inflammation and subsequent fibrosis perpetuate valvular stiffening and stenosis.

• Thickening and fibrosis of the mitral valve leaflets.
• Commissural fusion.
• Shortening and fusion of the chordae tendineae.
• Results in a narrowed valve orifice (stenosis) or incompetent valve leaflets leading to backward blood flow (regurgitation).
• Calcification may occur in chronic cases.
• Left atrial enlargement is a common consequence.

• Impaired blood flow through the mitral valve.
• Mitral stenosis impedes forward flow from the left atrium to the left ventricle, increasing left atrial pressure.
• Can lead to pulmonary hypertension and right ventricular strain.
• Mitral regurgitation causes volume overload on the left atrium and can compromise left ventricular output.
• Chronic rheumatic myocarditis can lead to depressed left ventricular systolic function.
• Can lead to symptoms such as dyspnea on exertion, fatigue, atrial fibrillation, and heart failure.

• Echocardiography (Doppler) is the gold standard.
• Characteristic findings: thickened and restricted mitral valve leaflets, doming of the anterior leaflet in diastole (hockey stick sign), commissural fusion, subvalvular fibrosis, and mitral stenosis.
• Doppler imaging quantifies valve stenosis and regurgitation and assesses hemodynamic effects.
• Cardiac MRI can provide complementary information.
• Chest radiography may reveal cardiomegaly, left atrial enlargement, and signs of pulmonary hypertension or heart failure.

• Elevated C-reactive protein (CRP) and erythrocyte sedimentation rate (ESR) can indicate inflammation.
• Tests may be used to check for a high immune response.

• Management of valve dysfunction and prevention of rheumatic fever recurrence.
• Percutaneous mitral balloon valvuloplasty for suitable candidates with mitral stenosis.
• Surgical intervention (valve repair or replacement) for severe or complex cases.
• Valve repair is preferred over replacement for mitral regurgitation.
• Medical management: diuretics and afterload reducers for heart failure symptoms.
• Anticoagulation for atrial fibrillation.
• Secondary prophylaxis with long-acting penicillin injections to prevent recurrent infections.

• Depends on severity of valve damage, presence of complications, and adherence to treatment/prophylaxis.
• Symptomatic patients with severe mitral stenosis have a poorer prognosis.
• Timely intervention and consistent secondary prophylaxis can significantly improve outcomes.
• Without intervention and consistent prophylaxis, the disease is progressive and can lead to heart failure, pulmonary hypertension, arrhythmias, and increased mortality.

• Viral infections can cause myocarditis but are not the primary etiology of rheumatic heart disease.

• Infective endocarditis is a distinct valvular pathology, often caused by bacterial seeding of damaged valves or prosthetic material, and is not the underlying cause of rheumatic valve changes.

• Rheumatic mitral valve disease is a chronic sequela of acute rheumatic fever, an autoimmune response triggered by a *Streptococcus pyogenes* infection, typically pharyngitis. This process leads to inflammation and subsequent scarring of the mitral valve leaflets and subvalvular apparatus.
• W.E.M. Diseases of the Heart, 2015.

• Mitral annular calcification is a separate degenerative process, more common in the elderly, and distinct from the inflammatory and fibrotic changes seen in rheumatic heart disease.

• While granulomas can be seen in some inflammatory conditions, they are not the hallmark of rheumatic carditis.

• Aschoff bodies, which are focal collections of inflammatory cells (lymphocytes, plasma cells, and macrophages), and MacCallum plaques, areas of subendocardial thickening, are characteristic histological findings of acute rheumatic carditis.
• Kumar V, Abbas AK, Fausto N, Aster JC. Robbins and Cotran Pathologic Basis of Disease. 9th ed. Elsevier; 2014.

• This description is more indicative of bacterial pericarditis.

• Myxoid degeneration is characteristic of conditions like mitral valve prolapse, not rheumatic heart disease.

• While hemoptysis can occur in mitral stenosis, it is less common as an initial symptom and often suggests higher pulmonary venous pressures or rupture of bronchial submucosal vessels.

• Palpitations can occur due to arrhythmias like atrial fibrillation, which are complications of advanced mitral stenosis, but are not typically the primary presenting symptom.

• Exertional dyspnea is the most common initial symptom reported by patients with mitral stenosis, reflecting the increased left atrial pressure and pulmonary venous congestion that occurs with increased cardiac output during exertion.
• Bonow RO,abbe L, Armstrong WF, et al. ACC/AHA 2006 Guidelines for the Management of Patients With Valvular Heart Disease. Circulation. 2006;114:e574-e631.

• Syncope in mitral stenosis is less common and may suggest severe outflow obstruction or associated arrhythmias, but it is not the most frequent initial complaint.

• This description is characteristic of mitral regurgitation.

• The classic auscultatory findings of mitral stenosis include a loud S1 (if leaflets are mobile), an opening snap (OS) that occurs early in diastole after the A2 component of S2, and a mid-diastolic rumble best heard at the apex with the patient in the left lateral decubitus position. The opening snap signifies the abrupt opening of the stenotic mitral valve, and the rumble is due to turbulent flow across the narrowed valve during diastole.
• Braunwald E. Heart disease: a textbook of cardiovascular medicine. 9th ed. Elsevier Saunders; 2012.

• This murmur is typical of a patent ductus arteriosus.

• While an opening snap can be present, a purely late-diastolic murmur is less typical; the rumble of MS is typically mid-diastolic and may become presystolic in the presence of atrial fibrillation or a normal sinus rhythm due to atrial contraction.

• SAM is typically seen in hypertrophic obstructive cardiomyopathy, where the mitral leaflets move anteriorly during systole, obstructing outflow.

• Echocardiography in rheumatic mitral stenosis characteristically reveals thickened, immobile mitral valve leaflets. The anterior leaflet often exhibits a “doming” motion during diastole, giving it a hockey-stick appearance due to commissural fusion and restricted leaflet excursion.
• Pannu N, Nanda NC. Echocardiography of the mitral valve. 2nd ed. Churchill Livingstone; 2007.

• Prolapse refers to displacement beyond the mitral annulus during systole and is characteristic of myxomatous valve disease or mitral valve prolapse syndrome.

• While leaflet thickening is present, the characteristic finding of the anterior leaflet is doming, not retraction.

• While MVA by planimetry directly measures the valve orifice, it can be challenging to obtain accurate measurements in complex rheumatic valve disease. PHT is often used as a reliable surrogate.

• Ejection fraction assesses left ventricular systolic function and is not a direct measure of mitral valve stenosis severity.

• PASP is an indirect measure of the severity of mitral stenosis, reflecting the downstream effects of elevated left atrial pressure, but not the primary measure of the stenosis itself.

• The pressure half-time (PHT) is a crucial echocardiographic parameter derived from the pressure decay curve across the mitral valve. It represents the time in milliseconds for the pressure gradient to decrease by half, and it correlates inversely with the mitral valve area (MVA), allowing for severity assessment of mitral stenosis. A longer PHT indicates a smaller MVA and more severe stenosis.
• Oh JK, Seward JB, Khandheria BK. The Echo Manual. 3rd ed. Lippincott Williams & Wilkins; 2005.

• While combined aortic valve disease can occur in rheumatic heart disease, the primary focus for isolated mitral stenosis is on the consequences of left atrial and pulmonary hypertension. LV size is more directly affected by regurgitant lesions or systolic dysfunction.

• Rheumatic mitral stenosis leads to increased left atrial pressure, which results in left atrial enlargement. This elevated pressure is transmitted backward to the pulmonary circulation, causing pulmonary venous hypertension and subsequently pulmonary artery hypertension. Assessing these parameters is crucial for determining disease severity, prognosis, and potential complications.
• Nagueh SF, Levitt JE, Byrne JG, et al. Guidelines for the evaluation and medical management of patients with aortic and mitral valve disease. J Am Coll Cardiol. 2017;69(12):e173-e268.

• Tricuspid involvement can occur in RHD, but isolated tricuspid stenosis is rare, and RVH is a consequence of pulmonary hypertension, not a primary assessment for mitral stenosis itself.

• Pericardial effusion is not a typical finding of chronic rheumatic mitral stenosis, and aortic root dilation is more commonly associated with other conditions like hypertension or connective tissue disease.