First generation adenoviral vectors and associated recombinant adenovirus-based HIV vaccines which show enhanced stability and growth properties and greater cellular-mediated immunity are described within this specification. The invention thus relates to the plants, seeds and tissue cultures of the variety CV309595, and to methods for producing a corn plant produced by crossing a corn plant of variety CV309595 with itself or with another corn plant, such as a plant of another variety. The defibrillation energy delivery circuit requires fewer electronic components, reducing the size andor cost of the implantable cardiac rhythm management device.