A method and system for ventricular defibrillation by coordinating the delivery of defibrillation shocks with sensed ventricular fibrillation complexes in a way which improves the probability of success of the defibrillation shock. The first storage controller is configured to control data access requests to the first data volume. From the two-dimensional images captured, three-dimensional data relating to the position and orientation of the input device may be obtained from the relative positions of the tracking points by a provided algorithm and lookup table. Similarly, a plurality of biasing means, referred to herein as \u201cskates\u201d, forces the ram down against the sealing sleeve to seal pressure from above the BOP. The seats are carried with the hood as the hood is moved between the open and closed positions. Related fabrication methods are discussed.