P wave recognition and atrial stimulation with fractally iridium coated VDD single pass leads.

Unlabelled: The bottleneck of VDD systems is the reliable detection of the small atrial signals by a floating atrial electrode. Fractally iridium coated electrodes offer excellent sensing and pacing performance. In this study, the performance of such a floating atrial lead in P wave sensing and synchronous ventricular stimulation was examined.

Lyme pericarditis leading to tamponade.

We report the case of a 62-yr-old man who presented with Lyme pericarditis leading to cardiac tamponade shortly followed by an arthritis. IgM and IgG antibodies to Borrelia burgdorferi were demonstrated in serum by indirect immunofluorescence. Borrelia burgdorferi was demonstrated and identified in pericardial fluid by indirect immunofluorescence using serum from a patient with proven Lyme disease and by a monoclonal antibody immuno-gold silver stain.