[The thickness/radius ratio (t/r) in patients with dilated and hypertrophic cardiomyopathy].
We studied 17 patients with cardiomyopathy (10 hypertrophic and 7 dilated). With two-dimensional echocardiography, we obtained a short axis view at the level of papillary muscle. We calculated the ratio between thickness (h), of ventricular wall and cavity's radius (r) in diastole and systole (h/r ratio). Hypertrophic cardiomyopathy has a high h/r ratio in diastole (inappropriate hypertrophy), hypercontractility and low and systolic wall stress. Dilated cardiomyopathy has a low diastolic h/r ratio (inadequate hypertrophy) with low contractility and elevated end-systolic, wall stress. We discuss the mechanisms and consequences of different patterns of hypertrophy on the ventricular performance.
Guadalajara
J F
JF
Servicio Clínico, Instituto Nacional de Cardiología Ignacio Chávez.
Valenzuela
F
F
Martínez Sánchez
C
C
Huerta
D
D
D000328:Adult; D001794:Blood Pressure / Q000502:physiology; D006332:Cardiomegaly / Q000000981:diagnostic imaging*; D002311:Cardiomyopathy, Dilated / Q000000981:diagnostic imaging*; D003971:Diastole; D004452:Echocardiography; D006334:Heart Function Tests; D006801:Humans; D009200:Myocardial Contraction; D010210:Papillary Muscles / Q000473:pathology; D013599:Systole
La relación grosor/radio (h/r) en las miocardiopatías hipertrófica y dilatada.