RESULTS
Ten subjects requiring a diagnostic right and left heart catheterization
were screened and enrolled in the study. All ten subjects were
successfully paced in AV sequential synchrony with the TAVPS catheter
(Table 1). The duration of time that the pacing catheter was left in the
patient averaged 24 minutes (range of 10-48 minutes), including
positioning, deployment, the pacing of the right ventricle, right
atrium, synchronous atrioventricular pacing, and removal. That sequence
was followed in all cases. Four catheters were inserted and positioned
without fluoroscopy; five were done with fluoroscopy guidance and one
with the use of echocardiography.
Echocardiography showed a mean ventricular longitudinal dimension of 6.1
cm, mean right atrial minor dimension of 4.1 cm, and mean right atrial
area of 15.89cm2 (ranging from
8.21cm2 to 26.60cm2) (Table 2). All
subjects were assessed for any complications with trans thoracic
echocardiogram at all times during the procedure. There were no adverse
events during the pacing procedure. At discharge the following day,
there were no adverse events reported. Patients were followed up as per
standard of care after discharge.
In all ten patients, the pacing catheter achieved an excellent pacing
threshold and impedance except for one. (Table 1). Patient number 7 had
adequate thresholds and impedance in the ventricular leads but poor
performance in the atrial leads.