Coronary Anastomosis

Suture path · 16 steps

Step

Needle A, heel side
Needle B, toe side
Step 10, the vessels join
dot = read straight off a reference frame

Drawing

The chart is the reference drawing. The vessels are the same twelve points rolled up, so you can watch artery 6 become graft 12 on the way across.

View

Drag to orbit, scroll to zoom. Arrow keys step, space plays.

Suture

It is one strand. A double-armed suture carries a needle on each end, so A and B are the two ends of the same length of Prolene. They start together at the heel, run opposite ways round, and are tied to each other where they meet.

Direction through the wall Ghost the remaining bites

Direction is unconfirmed. None of the six reference frames show which way the needle passes, and it is the thing trainees get wrong. Needs the surgeon's call.

This step

Source: derived

The mapping is one rule: the graft is flipped 180° about the heel-toe axis, so graft = (18 − artery) mod 12. Heel and toe hold still, the two long sides swap. Every observed frame fits it.

Draft, 17 September 2026. Geometry reconstructed from six frames. Not verified for clinical teaching.

Step 1 / 16

Coronary anastomosis · suture path, three dimensions