Abstract: A system for ablating tissue and electrically interfacing with a heart including an electrosurgical instrument, an energy source, and a controller. The instrument includes a shaft maintaining first and second electrodes at a distal section. The electrodes are electrically isolated from one another. The controller controls delivery of energy from the energy source, and monitors electrical signals at the electrodes. The controller is programmed to operate in a monopolar mode and a bipolar mode. In the monopolar mode, the first and second electrodes are electrically uncoupled, and energy from the energy source is delivered to the first electrode in performing an ablation procedure. In the bipolar mode, first and second electrodes are electrically coupled and serve as opposite polarity poles to apply energy to a tissue target site, detect electrical signals at a tissue target site, or both.

Abstract: A base rolling engine for collapsing data packages stored in a data transfer and synchronization system. A first data package is provided. The first data package has a first transaction including an identification number, an action, and a plurality of fields. Each field has an attribute representing change information. A second data package is also provided. The second data package has a second transaction made subsequent to the first transaction. The second transaction has an identification number, an action, and a field with an attribute. The base rolling engine determines whether the identification number of the second transaction corresponds to the identification number of the first transaction. The base rolling engine also determines whether the field of the second transaction corresponds to one of the fields of the first transaction.