What to do if the wire can cross the retrograde channel but the microcatheter cannot.


Corsair/turnpike won’t cross
Switched microcatheter won’t cross
Fail to cross after balloon dilatation.
L-> R septal Switch to Caravel/ Turnpike LP* 1.25 mm balloon to dilate channel Side-branch anchor balloon
R->L Septal Beware too tortuous PDA to septal channel angle
Epicardial Switch to finecross Beware too small channel.
  • If septal ostium stented -> dilate septal ostium with small balloon.