5 years ago

Automated analysis of fetal cardiac function using color tissue Doppler imaging

G. Acharya, M. Westgren, P. Lindgren, S-E. Sonesson, K. Ferm-Widlund, J. Johnson, L. Herling, F. Bergholm
Objectives Our main objective was to evaluate the feasibility of an automated analysis of fetal myocardial velocity recordings obtained by color tissue Doppler imaging (cTDI). Methods This was a prospective cross-sectional observational study of 107 singleton pregnancies in ≥41 weeks of gestation. Myocardial velocity recordings were obtained by cTDI in a long-axis four-chamber view of the fetal heart. Regions of interest (ROI) were placed in the septum, right (RV) and left ventricular (LV) walls at the level of the atrioventricular plane (AV-plane). Peak myocardial velocities and mechanical cardiac time intervals were measured both manually and by an automated algorithm and agreement between the two methods was evaluated. Results A total of 321 myocardial velocity traces were analyzed by both methods. It was possible to analyze all velocity traces obtained from the LV, RV and septal walls with the automated algorithm and myocardial velocities and cardiac mechanical time intervals could be measured in 96% of all traces. The same results were obtained when the algorithm was run repeatedly. The myocardial velocities measured by the automated method correlated significantly with those measured manually. The agreement between methods was not consistent and occasionally had considerable bias and precision for different cTDI parameters. Conclusions Automated analysis of myocardial velocity recordings obtained by cTDI was feasible suggesting that it could simplify and facilitate the use of cTDI in the evaluation of fetal cardiac function in both research and clinical practice.

Publisher URL: http://onlinelibrary.wiley.com/resolve/doi

DOI: 10.1002/uog.18812

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