Mitral stenosis differential diagnosis

Mitral Stenosis Microchapters
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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]; Associate Editor(s)-in-Chief: Cafer Zorkun, M.D., Ph.D. [2];Yamuna Kondapally, M.B.B.S[3]

Overview

The possible causes, and other conditions that may present similarly, should be evaluated for when there is suspicion of mitral stenosis.

Differentiating Mitral Stenosis from other Diseases

Mitral stenosis must be differentiated from the following:

Diseases	History	Symptoms	Physical Examination	Murmur	Diagnosis				Other Findings
					ECG	CXR	Echocardiogram	Cardiac Catheterization
Mitral Stenosis	Age ( Mitral annular calcification in older patients) Rheumatic fever Endocarditis	Dyspnea on exertion Paroxysmal nocturnal dyspnea Orthopnea New onset atrial fibrillation	Mitral facies Heart murmur Jugular vein distension Apical impulse displaced laterally or not palpable Diastolic thrill at the apex Signs of heart failure in severe cases	Diastolic murmur Low pitched Opening snap followed by decrescendo-crescendo rumbling murmur Best heard with the bell of the stethoscope at apex at end-expiration in left lateral decubitus position Intensity increases after a valsalva maneuver, after exercise and after increased after load (eg., squatting, isometric hand grip)	P mitral Atrial fibrillation: No P waves and irregularly irregular rhythm Right axis deviation Right ventricular hyppertropy: Dominant R wave in V1 and V2	Straightening of the left border of the heart suggestive of enlargement of the left atrium Double right heart border (Enlarged left atrium and normal right atrium) Prominent left atrial appendage Splaying of subcarinal angle (>120 degrees) Calcification of mitral valve Kerley B lines	Reduced valve leaflet mobility Valve calcification Doming of mitral valve Valve thickening	Right heart catheterization: Pulmonary capillary wedge pressure (left atrial pressure) Left heart catheterization: Pressures in left ventricle Determines the gradient between the left and right atrium during ventricular diastole (marker of the severity of mitral stenosis)	Heamoptysis (heart failure) Ortner's syndrome
Mitral Regurgitation	CAD MI Rheumatic fever Endocarditis Mitral valve prolapse Cardiomyopathy Radiation therapy Trauma	Palpitations Symptoms of heart failure in severe cases	Palpation Brisk carotid upstroke and hyperdymanic carotid impulse on palpation Apical impulse is displaced to left S3 and a palpable thrill Auscultation Murmur	Holosystolic murmur High pitched, blowing Radiates to axilla Best heard with the diaphragm of the stethoscope at apex in left lateral decubitus position Intensity increases with hand grip or squatting Decrease in intensity on standing or valsalva maneuver
Atrial Septal Defect				Midsystolic (ejection systolic) murmur Widely split, fixed S2 Upper left sternal border
Left Atrial Myxoma				Early diastolic sound as "tumor plop" Low frequency diastolic murmur may be heard if the tumor obstructing mitral valve
Prosthetic Valve Obstruction				Muffling or disappearance of prosthetic sounds Appearance of new regurgitant or obstructive murmur
Cor Triatriatum				Diastolic murmur with loud P2 No opening snap or loud a loud S1
Congenital Mitral Stenosis				Mild-Moderate Loud S1 Loud P2 Low frequency diastolic murmur best heard at the apex Severe Soft S1 Loud pulmonic component of S2 with minimal respiratory splitting of S2 Holodiastolic murmur with presystolic accentuation best heard at the apex Early diastolic murmur of pulmonic valve regurgitation
Supravalvular Ring Mitral Stenosis				An apical mid diastolic murmur with presystolic accentuation No opening snap The murmur is more prominent if associated with VSD or PDA