Limitations
This study was a non-randomized retrospective observational study. Small
sample size and inter-operator variability due to the skill of each
operator may have affected the reliability of the study results. The
measurement of RA size was not quantitatively assessed with CT or MRI
images in all patients. All patients were Asian and differences in
physique between races may affect applicability of our results to other
races. There were differences in age and implanted devices between the 2
groups. However, we don’t believe they contributed to the study results.
Further prospective multicenter studies will be required to elucidate
the safety and efficacy of LV-LP guided by Inner-Cath alone.