1. A medical imaging system comprising: image acquisition circuitry; a display; a memory; an input for positioning a point-caliper on the display; a processor coupled to the image acquisition circuitry, the display, the input and the memory; and a physiologic marker program stored in the memory for execution by the processor, the physiologic marker program configured to obtain from a position of the point-caliper on a first dataset image a physiologic marker definition for an event, determine a physiologic marker associated with the marker definition, and superimpose the physiologic marker on a second dataset; and wherein the event is one of a heart valve opening, a heart valve closing, or a time offset from one of a heart valve opening or a heart valve closing.