A method and a device for analysis and display of blood flow information in the human or animal body are described. The method includes the following steps:a) providing a digital input data set including a time series of two or three dimensional velocity vector fields, wherein each velocity vector field represents the velocity of the blood flow within a blood vessel, especially of a heart chamber or part thereof, of a certain human or animal body within a certain time frame within one heart cycle,b) calculating a gradient vector field for each time frames from the time series of velocity vector fieldsc) summing the gradients over the gradient vector field or a part thereof for each time frame to a summed gradient andd) displaying and/or analyzing the summed gradients with reference to their space directions within the blood vessel.
