Conversion of fiber stress to global left ventricular pump work

摘要: In the present study, muscle fiber stress (Tf) and strain in wall of left ventricle is expressed as a function ventricular pressure (plv) ratio cavity volume (Vlv) to (Vw). Muscle assumed be homogeneously distributed within wall. The may represented by thick-walled cylinder well sphere. For both cases: Tf = 3 plv/1 n(1 + Vw/Vlv). From latter equation, relation derived between strain. appears only relevant geometric parameter. real geometry close an ellipsoid, which cylindric spherical geometry. So, found valid for wide variety realistic cardiac shapes. Fiber calculated with model 1.5 2 times higher than circumferential existing models, depending on This difference agreement our current understanding stress.