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Thread: difference bet restrictive & constrictive cadiomyopathy?

  1. #1
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    Arrow difference bet restrictive & constrictive cadiomyopathy?

    i just wanted to know a conceptual view(not just a text book version) of the difference between obliterative & restrictive cardiomyopathy.
    [not a test question, i just wanna clear my concept]
    Last edited by rabia; 07-22-2007 at 12:23 AM.
    Most people are only alive because it is illegal to shoot them.

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    Do you wish to ask the difference between constrictive pericarditis and restrictive cardiomyopathy?

    I haven't come across the term constrictive cardiomyopathy.

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    Ya. i think she made mistake in writing.

    significant history
    Peripheral stigmata of systemic disease, Presence of loud diastolic filling sound S3, Low-frequency sound, Murmurs of mitral and tricuspid insufficiency, Normal results of prior chest x-ray in Restrictive Cardiomyopathy.
    Pericardial knock, high-frequency sound, No murmurs, Pericardial calcification in Constrictive Pericarditis.

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    Both result in restriction of ventricular filling.

    Restrictive Cardiomyopathy is the pathology in the cardiac wall (myocardium) itself.

    Constrictive Pericarditis is the pathology outside the wall. i.e in the pericardium.

    Echocardiography shows the pathology directly i.e thickened myocardium or thickened pericardium.


    Quote from Harrison:-

    Because constrictive pericarditis can be corrected surgically, it is important, though often difficult, to distinguish chronic constrictive pericarditis from restrictive cardiomyopathy, which has a similar physiologic abnormality, i.e., restriction of ventricular filling. In many of these patients the ventricular wall is thickened on echocardiographic examination. The features favoring the diagnosis of restrictive cardiomyopathy over chronic constrictive pericarditis include a well-defined apex beat, cardiac enlargement, and pronounced orthopnea with attacks of acute left ventricular failure, left ventricular hypertrophy, gallop sounds (in place of a pericardial knock), bundle branch block, and in some cases abnormal Q waves on the ECG. The echocardiogram in chronic constrictive pericarditis characteristically shows pericardial thickening, i.e., a distinct echo posterior to the left ventricular wall, and paradoxical septal motion. The left ventricular wall moves sharply outward in early diastole and then remains flat. Marked respiratory variations in atrioventricular flow velocities on Doppler echocardiography are characteristic of constrictive pericarditis but not restrictive cardiomyopathy. The definitive diagnosis of restrictive cardiomyopathy, when it is due to an infiltrative disease such as amyloidosis, can often be established by endomyocardial biopsy. CT scanning and MRI are very useful in distinguishing between restrictive cardiomyopathy and chronic constrictive pericarditis. In the former, the ventricular walls are hypertrophied, while in the latter the pericardium is thickened and sometimes calcified.

    When a patient has progressive, disabling, and unresponsive congestive failure and displays any of the features of constrictive heart disease, the most careful and detailed clinical and laboratory studies must be carried out in order to detect or exclude constrictive pericarditis, since the latter is usually curable.

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    i m so sorry. i made a typing mistake.i have edited my question. the question was actually"whats the difference bet restrictive and obliterative cardiomyopathy"
    any way still thanks for letting me know some thing about constrictive pericarditis as well
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