[Verse 1] One vessel outta two ventricles — that's the truncus tale, Healthy heart's got two roads split: aorta and pulmonary trail, Left ventricle feeds the body, right one feeds the lung, Two separate highways, that's the tune the steady heart has sung, Draw it clean — aorta arching, pulmonary artery low, Semilunar gates deciding exactly where the blood can flow. [Chorus] Dibuja el corazón, memory on the page, Normal, truncus, repaired — tres dibujos, one stage, Sígueme el problema, follow where the pressure hides, Corazón sano, roto, fixed — draw all three, no guide. [Verse 2] Now truncus arteriosus type two, the split never came, One trunk carries everything — aorta, pulmonary, same name, Branch pulmonary arteries rising near the top, Off the common trunk before the arch can even drop, One truncal valve, leaflets straddling the crest, VSD sitting underneath — that's the override test, This ain't two lanes merging, it never split at all, One vessel wearing two coats, standing tall. [Chorus] Dibuja el corazón, memory on the page, Normal, truncus, repaired — tres dibujos, one stage, Sígueme el problema, follow where the pressure hides, Corazón sano, roto, fixed — draw all three, no guide. [Verse 3] Post-repair the picture shifts, surgeons built a bridge, Conduit connects the right ventricle up over the ridge, Homograft or synthetic tube, routing blood to the lung, Truncal root gets promoted, neo-aorta, young, This repaired diagram's no blank slate wiped clean — It's a palimpsest, old anatomy still ghostly seen, Underneath the surgeon's ink the truncal root remains, Layered history sketched in every scar and seam. [Bridge] Echo says the conduit gradient's sitting at sixty-seven, RV pressure ninety — that ain't casual, that ain't even, Locate it: right ventricle straining past the tube, Stenosis pinching the channel, outflow overdue, Next step — think it through, don't just chart and roam, Cath lab checks the numbers, echo calls you home, Balloon it, stent it, or ring the surgeon for a swap, Follow the problem to the conduit — that's where the workup stops. [Chorus] Dibuja el corazón, memory on the page, Normal, truncus, repaired — tres dibujos, one stage, Sígueme el problema, follow where the pressure hides, Corazón sano, roto, fixed — draw all three, no guide. [Outro] Three diagrams, one page, sin trampa, from your mind, Normal, truncus, repaired — leave nothing behind, Sígueme el problema, trace the pressure to its source, Draw it, name it, fix it — that's the cardiac course.
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