  The detection of an intermediate-mass black hole population ($10^2-10^6$
$M_{\odot}$) will provide clues to their formation environments (e.g., disks of
active galactic nuclei, globular clusters) and illuminate a potential pathway
to produce supermassive black holes. Ground-based gravitational-wave detectors
are sensitive to mergers that can form intermediate-mass black holes weighing
up to $\sim 450\ M_{\odot}$. However, ground-based detector data contain
numerous incoherent short duration noise transients that can mimic the
gravitational-wave signals from merging intermediate-mass black holes, limiting
the sensitivity of searches. Here we follow-up on binary black hole merger
candidates using a ranking statistic that measures the coherence or incoherence
of triggers in multiple-detector data. We use this statistic to rank candidate
events, initially identified by all-sky search pipelines, with lab-frame total
masses $>55\ M_{\odot}$ using data from LIGO's second observing run. Our
analysis does not yield evidence for new intermediate-mass black holes.
However, we find support for eight stellar-mass binary black holes not reported
in the first LIGO-Virgo gravitational wave transient catalog GWTC-1, seven of
which have been previously reported by other catalogs.
