The bi-ventricular implantable pulse generator described and depicted herein enables hemodynamic efficiencies for patients suffering from intraventricular conduction delays or conduction blockage. The beating heart may be stabilized during a surgical procedure on the heart, using a described stabilizing device. A first lever has a first corrugated portion and it pivots with the tray unit according to sliding motion of the side fence. The fluids exit the mixing box through an outlet opening in a bottom wall of the mixing box. This approach enables the use of low cost components to integrate a positioning network on equipment used for other functions, such as audio playback equipment at shopping malls and other venues where location based services are desired. The filter unit cell includes a variable capacitor coupled in series between first and second nodes and an inductor coupled in series between the second node and a third node.