Abstract
We studied P wave amplitude (PWA) histogram in 6 patients with implanted single pass lead VDD pacemakers.The pacemakers detected PWA automatically at 6-minute intervals and data were expressed on histograms by eight bins. The average age of patients was 62.3±17.8 years (mean±SD). The half-amplitudes of the atrial sensing threshold measured by conventional method correlated positively to those assessed by PWA histogram (r=0.77, p<0.0001). Incidences of atrial sensing failure were documented by the records of PWA histograms. In conclusion, PWA histogram is useful to determine adequate atrial sensitivity in patients with implanted single pass lead VDD pacemakers.
