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Restrictive Cardiomyopathy - Feline Cardiomyopathies (view source)
Revision as of 16:21, 2 December 2012
, 16:21, 2 December 2012→Endomyocardial form of Restrictive Cardiomyopathy (eRCM)
Two-dimensional (2D) and M-mode imaging may reveal pronounced dilation of one or both atria and normal diameter and thickness of the ventricular chambers. Within the left atrium it is often possible to identify areas of spontaneous echo-contrast, reflecting blood stasis, or thrombi. The left atrium and the left auricular appendage should be carefully examined for this reason. It is useful to measure left auricular appendage flow velocity. Even in the absence of thrombi, evidence suggests that if velocity is <0.2 m/s on pulsed wave Doppler, the cat is at risk of thromboembolic complications.
Two-dimensional (2D) and M-mode imaging may reveal pronounced dilation of one or both atria and normal diameter and thickness of the ventricular chambers. Within the left atrium it is often possible to identify areas of spontaneous echo-contrast, reflecting blood stasis, or thrombi. The left atrium and the left auricular appendage should be carefully examined for this reason. It is useful to measure left auricular appendage flow velocity. Even in the absence of thrombi, evidence suggests that if velocity is <0.2 m/s on pulsed wave Doppler, the cat is at risk of thromboembolic complications.
===Endomyocardial form of Restrictive Cardiomyopathy (eRCM)===
====Endomyocardial form of Restrictive Cardiomyopathy (eRCM)====
This form of RCM is characterised by severe endomyocardial fibrosis with a 'bridging scar' crossing the left ventricle. This endomyocardial bridging scar may be associated with left ventricular obstruction during systole. In early forms, focal left ventricular hypertrophy may be evident, which over time progresses to the formation of a 'bridging scar'.
This form of RCM is characterised by severe endomyocardial fibrosis with a 'bridging scar' crossing the left ventricle. This endomyocardial bridging scar may be associated with left ventricular obstruction during systole. In early forms, focal left ventricular hypertrophy may be evident, which over time progresses to the formation of a 'bridging scar'.
===Myocardial form of Restrictive Cardiomyopathy (mRCM)===
===Myocardial form of Restrictive Cardiomyopathy (mRCM)===
In this form of RCM, the left ventricle appears normal, but there is concurrent left atrial or biatrial enlargement.
In this form of RCM, the left ventricle appears normal, but there is concurrent left atrial or biatrial enlargement.