Atrial tachyarrhythmia burden modelling by some electrophysiological parameters in pacemaker-recipient patients with Brady-Tachy syndrome.

Aims: (1) To correlate atrial tachyarrhythmia (AT) burden of pacemaker-recipient Brady-Tachy syndrome (BTS) patients with a number of diagnostics-derived parameters after 1 month of DDD pacing; (2) to asses whether the activation of atrial overdrive or conventional rate-responsive pacing may affect relevant variables and their correlation.

Methods And Results: After 1 month of DDD pacing, rate-responsive function or persistent atrial overdrive was randomly activated for 3 months, in 92 BTS patients. Some pacemaker diagnostics parameters collected at 1- and 4-month follow-ups were included in multiple linear regression models, whose dependent variable was the Log transformation of AT burden and compared.