[Verse 1] After birth the lungs expand and breathe PVR drops down, resistance freed But in truncus the pulmonary tree Connects to high-pressure arteries Blood seeks the easiest route to take Flooding lungs while the body breaks [Chorus] Hemodynamic catastrophe Blood flows where it shouldn't be Lungs get flooded, body starved Ventricles dilated, scarred Ticking clock of vascular change Three to six months, permanent damage [Verse 2] Both ventricles pump enormous loads Just to push blood through systemic roads Much of their output gets hijacked away By pulmonary steal every day Congestive failure takes its toll Heart enlarges, loses control [Chorus] Hemodynamic catastrophe Blood flows where it shouldn't be Lungs get flooded, body starved Ventricles dilated, scarred Ticking clock of vascular change Three to six months, permanent damage [Bridge] Waterlogged lungs cause rapid breath Feeding struggles, growth arrest Liver swells from back-pressure rise Eisenmenger syndrome in disguise Arterioles thicken and constrict Surgery window closes quick [Verse 3] Pulmonary vessels start to thick Chronic pressure makes them sick Remodeling response kicks in Point of no return begins Once established, can't reverse Eisenmenger's permanent curse [Final Chorus] Hemodynamic catastrophe Mixing blood's just part, you see Where it goes determines fate Fix it early, don't be late Overcirculation kills Time-sensitive surgical skills [Outro] Truncus steals from systemic flow Pulmonary flood, the body's woe Repair before the vessels scar Three months out is going too far
← 2 How Blood Flows in Truncus Arteriosus — Compared to Normal | 4 The Truncal Valve →