Application of a rapid exchange extension catheter technique in type B2/C nonocclusive coronary intervention via a transradial approach

Figure 1 Target lesion characteristics.

Figure 2 A patient with coronary artery origin anomaly. A: The right coronary artery originated from the left coronary sinus. The left anterior descending artery and left circumflex artery were visible during right coronary artery angiography; B: The stent was successfully passed through the lesion and implanted with the aid of a rapid exchange extension catheter; C: Final angiographic result.

Figure 3 An extremely tortuous lesion of the distal segment of the right coronary artery. A: A lesion located in the distal segment of right coronary artery before the bifurcation, with extreme tortuosity in the proximal and middle segments of the right coronary artery; B: A stent (2.5 mm × 13 mm) was implanted with the use of the rapid exchange extension catheter; C: Final angiographic result.

Figure 4 A case with in-stent restenosis was treated with drug-coated balloon. A: The stent was visible in the middle-distal segment of the right coronary artery (RCA); B: Angiography revealed in-stent restenosis; C: A balloon predilated the in-stent restenosis lesion; D: Angiography after predilatation showed severe stenosis and tortuosity in proximal RCA; E: Preimplantation of a stent in the proximal segment of the RCA; F: Angiography after stenting the proximal RCA; G: An in-stent restenosis lesion was treated with drug-coated balloon using a rapid exchange extension catheter; H: Final angiographic result.