Visual analysis of regional myocardial motion anomalies in longitudinal studies

Ali Sheharyar*, Alexander Ruh, M. Aristova, Michael Scott, K. Jarvis, Mohammed Elbaz, Ryan Dolan, Susanne Schnell, Kai Lin, J. Carr, Michael Markl, Othmane Bouhali, Lars Linsen

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

5 Scopus citations


A heart-transplanted patient is at risk of developing several complications such as rejection, which is one of the leading causes of deaths in the first year after the transplant. The regional myocardial motion is known to be depressed early on during rejection before the reduction in global systolic function. Therefore, early detection of regional anomalies is crucial. We use a magnetic resonance (MR) imaging method called tissue phase mapping (TPM) to capture regional myocardial motion of heart-transplanted patients in a longitudinal study. We compare the individual scans of the longitudinal study to a cohort of healthy volunteers to detect anomalies. We use a spatio-temporal visualization based on a radial layout where myocardial regions are laid out in an angular pattern similar to the American Heart Association (AHA) model and where the temporal dimension increases with increasing radius. We compute nested envelopes of central regions for the time series of each region and each of the three velocity directions using the concept of functional boxplots. We propose visual encodings to analyze regional anomalies of a scan of an individual patient dataset and perform a qualitative user study with medical experts. We extend this layout to the visual analysis of longitudinal data to monitor changes in regional anomalies of a patient for multiple scans taken at different times. We apply our approach to data from a longitudinal study of patients under observation after a heart-transplant procedure and evaluate this mechanism with medical and non-medical experts.

Original languageEnglish (US)
Pages (from-to)62-76
Number of pages15
JournalComputers and Graphics (Pergamon)
StatePublished - Oct 2019


  • Biomedical visualization
  • Heart transplant
  • Myocardial motion

ASJC Scopus subject areas

  • Engineering(all)
  • Human-Computer Interaction
  • Computer Graphics and Computer-Aided Design


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