An apparatus for guidance of an interventional device, the apparatus comprising: - an input unit; - a data storage unit; - a data processing unit; and - an output unit; wherein the data storage unit is configured to provide a vasculature map of a region of interest with a vasculature presentation of a subject's vasculature structure; wherein the input unit is configured to receive and transfer to the data processing unit at least one current image of the region of interest, wherein at least one part of an interventional device is at least partly visible in the at least one current image when inserted within the vasculature structure in the region of interest; wherein the data processing unit is configured to combine the vasculature map and the at least one current image; to detect a location of the at least one part of the interventional device in the vasculature map; to detect if the at least one part of the interventional device lays outside the vasculature presentation shown in the vasculature map and to determine a branching-off location for the interventional device on the vasculature map; to adapt the vasculature map in the branching-off location providing an indication of the branching-off location; and wherein the output unit is configured to provide an adapted vasculature map. - an input unit; - a data storage unit; - a data processing unit; and - an output unit; wherein the data storage unit is configured to provide a vasculature map of a region of interest with a vasculature presentation of a subject's vasculature structure; wherein the input unit is configured to receive and transfer to the data processing unit at least one current image of the region of interest, wherein at least one part of an interventional device is at least partly visible in the at least one current image when inserted within the vasculature structure in the region of interest; wherein the data processing unit is configured to combine the vasculature map and the at least one current image; to detect a location of the at least one part of the interventional device in the vasculature map; to detect if the at least one part of the interventional device lays outside the vasculature presentation shown in the vasculature map and to determine a branching-off location for the interventional device on the vasculature map; to adapt the vasculature map in the branching-off location providing an indication of the branching-off location; and wherein the output unit is configured to provide an adapted vasculature map. wherein the data storage unit is configured to provide a vasculature map of a region of interest with a vasculature presentation of a subject's vasculature structure; wherein the input unit is configured to receive and transfer to the data processing unit at least one current image of the region of interest, wherein at least one part of an interventional device is at least partly visible in the at least one current image when inserted within the vasculature structure in the region of interest; wherein the data processing unit is configured to combine the vasculature map and the at least one current image; to detect a location of the at least one part of the interventional device in the vasculature map; to detect if the at least one part of the interventional device lays outside the vasculature presentation shown in the vasculature map and to determine a branching-off location for the interventional device on the vasculature map; to adapt the vasculature map in the branching-off location providing an indication of the branching-off location; and wherein the output unit is configured to provide an adapted vasculature map.