In-stent restenosis of left main chimney stent with successful percutaneous coronary intervention with drug-coating balloon: a case report and literature reviews

The chimney stent technique, initially developed as a bailout technique, is increasingly used prophylactically in anatomically high-risk cases. Lacking large-scale studies on chimney stent ISR limits our understanding. Besides CABG or repeat stenting, CB plus DCB may offer a potential opinion to achieve long-term benefits in such cases. With rapid increasing of TAVR patient, further studies may be needed to guide the possible complication with chimney stent in CAO cases.