Abstract: The disclosure provides an elongate tissue dissection and removal catheter having a length and defining a longitudinal axis along the length of the catheter. The tissue dissection and removal catheter includes an outer tubular member having a proximal end, a distal end, and defining an elongate passage therethrough along its length, and a subassembly slidably disposed in the elongate passage of the outer tubular member. The subassembly includes first and second deployable stabilizers configured to expand in lateral width along a direction transverse to the longitudinal axis when unconstrained by the outer tubular member. Each stabilizer can define a curved free distal end that is configured to be received within a cusp of a respective cardiac valve leaflet.

Abstract: Among other things, there is disclosed structure and methods for maintaining access to a location in the body while reducing or eliminating the potential for pulling an access device (e.g. a catheter) back through an opening. An introducer sheath includes a distal indented portion and a balloon, so that once placed in a desired location through tissue, the balloon can be inflated to anchor the sheath against retraction. In particular embodiments, structure and methods for accessing the pericardial cavity via the right atrial appendage are shown.

Abstract: A method and structure of estimating traffic in a network. A real-time estimate of the network traffic is calculated, based on limited real-time data about the network traffic calculated in an offline phase and limited real-time data received in a real-time phase.

Abstract: A method and structure of estimating traffic in a network. A real-time estimate of the network traffic is calculated, based on limited real-time data about the network traffic calculated in an offline phase and limited real-time data received in a real-time phase.