[Verse 1]
Centro del setto — the membranous floor,
where aortic and tricuspid touch at the door,
fibrous continuity, hinge of the heart,
perimembranous — the commonest start.
Extension inlet, outlet, trabecular hall —
one name, many borders, it wears them all.
[Chorus]
Attenzione, mind the rim —
His bundle hiding posteroinferior, slim,
sew on the right side, lontano dal bordo,
stay away from the edge, o cuore, va piano.
Perimembranous, occhio al cuore,
this border's the boss of surgical heart block.
[Verse 2]
The His bundle rides that posteroinferior line,
a tightrope of tissue, so easy to unwind —
one careless stitch and the rhythm turns still,
so surgeons aim rightward, away from the hill.
This is the type that teaches respect:
the border you honor, the border you protect.
[Chorus]
Attenzione, mind the rim —
His bundle hiding posteroinferior, slim,
sew on the right side, lontano dal bordo,
stay away from the edge, o cuore, va piano.
Perimembranous, occhio al cuore,
this border's the boss of surgical heart block.
[Verse 3]
Tricuspid septal leaflet, drifting, thin,
ballooning aneurysmal — a diaphanous skin,
thin as a veil, it seals the hole,
the heart's own patch job, closing it whole.
That's how the small ones vanish with time,
the pouch as the quiet, self-healing crime.
But sometimes the tunnel runs hidden, occult, and high,
straight into the atrium — Gerbode's sly,
left ventricle to right atrium, a shunt out of sight,
above the tricuspid hinge, sneaking past the light.
[Bridge]
Watch the aortic cusp, it may lean and it may fall,
prolapsing toward the gap — though less than type one's call.
Years can breed a membrane, a shelf down below,
double-chambered right ventricle, silent and slow.
Even the quiet ones, the "innocent" few —
follow them yearly, non lasciarli, don't let them slip through.
[Verse 4]
Small ones often vanish, sealed by the pouch,
moderate and large ones make the infant crouch —
failure to thrive, pressures on the climb,
patch it up with fabric, close it in time.
Older patients, rims robust and true —
a device on a catheter might just do.
[Chorus]
Attenzione, mind the rim —
His bundle hiding posteroinferior, slim,
sew on the right side, lontano dal bordo,
stay away from the edge, o cuore, va piano.
Perimembranous, occhio al cuore,
this border's the boss of surgical heart block.
[Outro]
Perimembranous, cuore in bilico,
watch the rim, watch the valve, watch the slow years unfold,
attenzione sempre — always the rim,
this common little gap — never taken for granted, mai.