A 76 year-old man showed diffuse stenosis of RCA with marked tortuosity and calcification. (Image 1, 2)

What will you do to enhance stent delivery to the target lesion ?
Left Amplatz Guiding Catheter
Deep intubation with 7F JR guiding catheter into RCA
Deep seating of 5 Fr guiding catheter into RCA through 7 Fr guiding catheter
Buddy wire techinique
 


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