1 Idiopathic cyclic edema â This is a condition in which one leg swells in correlation to the menstrual cycle.  AV fistula â An AV fistula can be post-trauma or congenital. An AV fistula of the femoral artery can cause a swollen leg that is warm and with prominent veins. It can cause systemic symptoms of heart failure.
A network video recorder (NVR) is a software program that records video in a digital format to a disk drive, USB flash drive, SD memory card or other mass storage device.ideo on a DVR is encoded and processed at the DVR, while video on an NVR is encoded and processed at the camera, then streamed to the NVR for storage or remote viewing. Hybrid NVR/DVR security systems exist which incorporate functions of both NVR and DVR; these are considered a form of NVR.
DVRs are also characterised by having an input for every camera connected ie, there is a direct connection, typically by BNC, UTP or fibre between each camera and the DVR. For example a 16 channel DVR will have 16 physical connections, one for each of the cameras. Let us move on to the NVR.Similarly NVR is defined as network video recorder, a device for recording digitised IP video streams, originating either from analogue cameras connected via IP encoders and/or IP cameras where the IP video streams are created inside each camera.VRs are also characterised by having an input for every camera connected ie, there is a direct connection, typically by BNC, UTP or fibre between each camera and the DVR. For example a 16 channel DVR will have 16 physical connections, one for each of the cameras. Let us move on to the NVR.