Sophia Bäck researches cardiac blood flow using computational fluid dynamics. Her institutional publication profile documents work on personalized atrial-flow models.[ref]
Sophia Bäck publication profile at Linköping University. Research statement and publication list
She is the first author of a primary study that reconstructed left-atrial flow from time-resolved computed tomography and followed modeled particles to distinguish six flow components.[ref]The study compared 21 participants with paroxysmal atrial fibrillation, imaged during sinus rhythm, with eight controls. Its analysis distinguished direct passage, storage and longer-residence histories within the left atrium.[ref]
Comprehensive left atrial flow component analysis reveals abnormal flow patterns in paroxysmal atrial fibrillation by Sophia Bäck and others. Abstract and flow-component definitions
The anatomical images constrain the model, while the trajectories are computational results; they are not direct optical tracking of every blood cell.An original two-region example illustrates the extra information supplied by spatial flow analysis. A chamber with total volume 40 mL and total throughput 20 mL/s has a nominal volume/flow timescale of 2 s. Suppose two idealized parallel regions each contain 20 mL but receive 19 and 1 mL/s. Their individual volume/flow timescales are about 1.05 s and 20 s, despite the unchanged overall volume and throughput.
The example does not predict a clinical threshold. It shows why global chamber volume and cardiac output can coexist with very different local transport histories. Atrial flow component analysis asks which blood passes onward, remains stored or returns through a boundary, adding information to the extrema used for atrial reservoir function. That link between anatomy, flow modelling and transport history is the documented scientific contribution.
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