Dynamics of Left Ventricular Ejection

This paper was presented in part to the 50th Annuial Scientific Sessions, Americani Heart Association, Miami, Fla., Noveml)er 1977. The opinions or assertions expressed herein are the private views of the authors and are not to be construed as reflecting the views of the Department of the Army of the Department of Defense. Received for publicatiotn 6 April 1979 anid inl revised formt 7 July 1980. presence or absence of intraventricular gradients. These results suggest that "outflow obstruction," as traditionally defined by the presence of an abnormal intraventricular pressure gradient and systolic anterior motion of the mitral valve, does not impede left ventricular outflow in HCM.