Non-invasive determination of ventricular relaxation time constant employs given relationship with measured inputs of blood velocity and acceleration in mitral valve region

摘要

Blood velocity is measured in the mitral valve region, using an image-forming and/or Doppler method. Variation of blood acceleration is measured. The ventricular relaxation time constant is determined using a given relationship. This at least takes into account the magnitude of blood acceleration variation. An Independent claim is included for fully- or partially-automatic apparatus to carry out the method.