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We present a challenging case of a 75-year-old female with a history of paroxysmal atrial fibrillation (PAF) and symptomatic sick sinus syndrome (SSS) who presented for a dual chamber pacemaker implantation and was found to have persistent left superior vena cava and absent right superior vena cava with stenosis of the left subclavian vein. In this report, we discuss the implant technique in this group of patients.

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The development of skeleton tools constitutes an alternative to cover the gap between current parallel architectures and sequential programmers. Its contruction involves formal models, paradigms and methologies. Based in the automata theory we have developed a formal model for Parallel Dynamic Programming over pipeline networks. This model makes up a paradigm which is the core of skeleton tools oriented to the Dynamic Programming Technique. Following the methodology coerced by the model, we present a tool that provides the user with the ability to obtain parallel programs adapted to the parallel architecture. The efficiency is contrasted on three current parallel platforms: Cray T3E, IBM SP2 and SG Origin 2000.

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