. Diseases of the heart and thoracic aorta. Fig. 18->,. Fig. 18o.—Section tkrour/h the left auricle and left ventricle of a child three roeeks old, showinq a papillarymuscle and its chorda in ultu. Marjnijied about 10 diameters. (The penVardium and couuectivetissue ou the outer surface of the left aiu-icle have become detached in the process ofmounting.) f>,papillary muscle; c, cliorda tendiiiea: m, posterior segment of the mitral valve; a, wall of tlieleft auricle; w, wall of the left ventricle. M^LlGAHiCuMMINGbTHC* Eo Aetiology of Mitral Incompetence. 425 pillary muscles occurs, and in
. Diseases of the heart and thoracic aorta. Fig. 18->,. Fig. 18o.—Section tkrour/h the left auricle and left ventricle of a child three roeeks old, showinq a papillarymuscle and its chorda in ultu. Marjnijied about 10 diameters. (The penVardium and couuectivetissue ou the outer surface of the left aiu-icle have become detached in the process ofmounting.) f>,papillary muscle; c, cliorda tendiiiea: m, posterior segment of the mitral valve; a, wall of tlieleft auricle; w, wall of the left ventricle. M^LlGAHiCuMMINGbTHC* Eo Aetiology of Mitral Incompetence. 425 pillary muscles occurs, and in consequence of this shorten-ing the various parts are maintained at the same levels inwhich they lay in diastole. ^ In this way retroversion of theflaps into the auricle during the ventricular systole is pre-vented. Regurgitation or incompetence may, therefore, be due tothe following pathological causes :— I. Defective iniLsciilar closure of the valve.—This condition,which I term imisciilar incompetence, and which is very oftencombined with dilata
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectheart, bookyear1884
