A method for medical imaging is provided, wherein a current position of a medical instrument inserted into a moving examination area of a patient is displayed. The medical instrument is displayed within a reconstructed three-dimensional image of the moving examination area based on position data of the instrument registered with a coordinate system of the reconstructed three-dimensional image. The reconstructed three-dimensional image is a simulation of the moving examination area using a pre-insertion 3D image of the examination area correlated with pre-insertion ECG data of the patient. A display of the reconstructed three-dimensional image is triggered by current ECG data of the patient.