title: Measurement of left ventricular pressure by a transseptally introduced tipmanometer in man and determination of instantaneous dP-dt and velocity of shortening of the contractile elements by an analog calculating unit.
mesh_terms: D000293:Adolescent; D001795:Blood Pressure Determination / Q000295:instrumentation*; D002986:Clinical Trials as Topic; D003202:Computers, Analog; D006801:Humans