# The Best Strategy for the Black Hole Phenomenon between Intravascular Ultrasound and Optical Coherence Tomography

## TL;DR

This paper discusses the black hole phenomenon in coronary arteries, comparing how well two imaging techniques detect it.

## Contribution

The paper presents a case where OCT more effectively identifies the black hole phenomenon compared to IVUS.

## Key findings

- The BH phenomenon is better identified by OCT than by IVUS.
- The BH phenomenon is uncommon after drug-eluting stent implantation.

## Abstract

The black hole (BH) phenomenon is an intraluminal restenotic lesion. It was identified by intravascular ultrasound (IVUS) and optical coherence tomography (OCT) after intracoronary brachytherapy and drug-eluting stent implantation. Despite the similarity in the mode of action of brachytherapy and drug-eluting stent implantation, the BH phenomenon appears to be uncommon after drug-eluting stent implantation. Specifically, the BH phenomenon is better identified by OCT than by IVUS. Herein, we present a case of in-stent restenosis with suspected BH phenomenon on IVUS and confirmed by OCT.