Renato Ricci, Paolo Azzolini,
Andrea Puglisi, Carlo Pignalberi*, Andrea Spampinato*, Fulvio Bellocci*, Giuseppe
Boriani**, Alessandro Capucci***, Sergio Cavaglia°, Maria Teresa Laudadio°, Francesco De
Seta°.
Fatebenefratelli Hospital, Rome, *Villa Tiberia Hospital, Rome, **Policlinico S.
Orsola, Bologna, ***Civile Hospital, Piacenza, °Medtronic Italia spa, Rome, Italy
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To validate CAP algorithm reliability we downloaded it
for 24 hours into the pulse generator of 15 patients, 3 male and 12 female, mean age 71 ±
7 years, affected by sinus nod1e disease, chronotropic incompetence and recurrent PAF,
implanted with Medtronic Thera DR 7940-7960 device (Medtronic, Inc., Minneapolis, USA)
with bipolar atrial and ventricular leads. Simultaneous Holter monitoring was recorded.
Eight patients had CAP algorithm validation in DDD pacing mode and 7 in DDDR pacing
mode.
 
Fig. 1: CAP intervention on sinus rhythm.
AP = atrial pacing; AS = atrial sensing.
Fig. 2: CAP intervention on a short run of premature atrial complexes.
AP = atrial pacing; AF = atrial fusion; AC RUN = premature atrial complexe run.
Fig. 3: CAP intervention on a short atrial tachycardia.
AP = atrial pacing; PAC RUN = premature atrial complexe run.
Delta deceleration was programmed at 50 msec, ARS delta at 20 msec, plateau beats at 5
and the lower rate at 60 ppm.
All patients were enrolled in this study after being followed-up for 12 months in a
prospective randomized cross-over trial organized to evaluate the antiarrhythmic benefits
of DDDR versus DDD pacing mode in patients with sinus node disease, chronotropic
incompetence and recurrent PAF8. As a
consequence, data collected during CAP analysis could be matched with 24-hour Holter
monitoring in conventional DDD and DDDR mode and with data stored in the pacemaker memory
during a 3-month follow-up period both in DDD and DDDR pacing modality.
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