Comprehensive appraisal of cardiac motion artefact in optical coherence tomography.

Background: The relation between cardiac motion artefact (CMA) in optical coherence tomography (OCT) and the phases of cardiac cycle is unclear.

Methods: Optical coherence tomography pullbacks containing metallic stents were co-registered with angiography and retrospectively analyzed. The beginning of three phases, namely ejection, rapid-inflow and diastasis, was identified in angiography.

Identification of the type of stent with three-dimensional optical coherence tomography: the SPQR study.

Background: The ability of optical coherence tomography (OCT) to identify specific types of stent has never been systematically studied.

Aims: The aim of this study was to test the accuracy of OCT imaging to identify patterns of stent platform and subsequently identify the type of stent implanted.

Methods: Consecutive patients from six international centres were retrospectively screened, searching for OCT studies with metallic stents or scaffolds.