[Verse 1]
Right atrium opens where the vena cavae pour their tide,
Tricuspid valve swings the blue blood to the right ventricle's side,
Pulmonic valve fires it up the pulmonary trunk in flight,
Lungs trade the carbon for oxygen, hand it back pure and bright.
Pulmonary veins deliver red cargo to the left atrium's floor,
Mitral valve, the quiet usher, opens the ventricle's door,
Aortic valve's the final gate, the body's only ramp,
Atrial septum splits the tops, ventricular septum stands the damp.
[Chorus]
Blue goes right, red goes left, that's the wall between,
Atrium, valve, ventricle, valve — memorize the routine,
Cavae in, aorta out, the four-beat trail don't fail,
Name the chamber, name the vessel, walk the whole loop's tale.
[Verse 2]
Now picture the ridge that never finished its splitting,
Aorticopulmonary wall just quit its knitting,
One trunk, one valve straddles the hole where two should be,
Coronaries and lung roots share a single tree.
Four changes tell it: no division of the great vessel,
One truncal valve alone runs the semilunar wrestle,
Pulmonary branches sprout off the trunk, not the right ventricle's floor,
And a gaping septal breach where a wall should close the door.
Type two ostial pattern — the branches, close and shy,
Separate little openings, side by side, not stacked up high.
[Chorus]
[Verse 3]
Surgeons chase three goals, a triad carved in bone:
Sever the lung's own river from the truncal throne,
Patch the septal gap so the truncal valve stands alone,
crowned as the aortic gate, systemic and known,
Then bridge right ventricle to lungs with a conduit freshly sewn.
Finished heart: the truncal valve wears the aortic crown,
VSD patched, one clean pathway down,
Right ventricle reaches skyward through a valved, grafted lane —
a borrowed tunnel standing in for a highway nature failed to sustain.
[Bridge]
That conduit's not living tissue — it won't stretch, it won't grow,
Calcium finds its lattice, narrowing the flow,
Senescence creeps in quiet, that's the tissue's slow decay,
So echo, cath, and watchful eyes must circle every year that stays.
No fix is ever final when the graft's a borrowed stone,
Lifelong follow-up's the toll for a highway not your own.
[Chorus]
[Verse 4]
Embryology's clock stalls where the septum should divide,
Neural crest cells wander, lost before they reach the truncal side,
One vessel, one valve, one root for the body and the lung,
Truncus arteriosus — the name where this tale begun.
[Outro]
Chamber, valve, septum, vessel — trace the circuit clean,
Truncus, ostia, conduit — say exactly what you've seen,
Mastery's no whisper, it's the whole map, sung complete —
inflow, outflow, repair, and watch — the heart's whole architecture, on repeat.