Related Experiment Video
Updated: Jul 3, 2026

Real-Time Cardiac Mapping with a Noninvasive Imageless Electrocardiographic Imaging System
Published on: April 11, 2025
Insights
Quantitative cardiotocography offers a non-invasive method for fetal surveillance. This computer-based analysis of cardiotocography (CTG) data correlates well with clinical conditions, improving fetal monitoring.
Area of Science:
- Obstetrics and Gynecology
- Fetal Medicine
- Computational Medicine
Context:
- Cardiotocography (CTG) is a standard method for fetal surveillance.
- Invasive methods like fetal blood sampling are needed for precise acid-base assessment.
- Quantitative cardiotocography (QCTG) offers a non-invasive alternative.
Purpose:
- To present the first clinical results of Quantitative cardiotocography (QCTG) in Bulgaria.
- To evaluate the correlation between QCTG-predicted fetal pH and clinical conditions.
- To assess the efficacy of a novel software solution for fetal surveillance.
Summary:
- A software solution implementing Quantitative cardiotocography (QCTG) was used to analyze 1356 CTG recordings.
- The method non-invasively calculates fetal blood pH based on CTG features.
- Early results show a good correlation between abnormal QCTG findings and clinical conditions such as preeclampsia and placental abruption.
Impact:
- Quantitative appraisal of CTG findings enhances interpretation accuracy.
- This method promises higher quality fetal surveillance during pregnancy and labor.
- Non-invasive prediction of fetal acid-base status can improve clinical decision-making.
Unlabelled:
Cardiotocography (CTG) is an up-to-date practical method for fetal surveillance during pregnancy and labor. More precise reading of the CTG data is possible with the use of some fetal acid-base parameters, taken from the umbilical artery (UA). Unfortunately, invasive procedures like fetal scalp blood sampling and/or cordocentesis are required to obtain these results. Latest computer technology enables us to create mathematical algorithms that uninvasively calculate prognostic values for fetal blood pH, based on interpretation of key CTG features. The method is called "Quantitative cardiotocography" and is implemented in a software solution for fetal surveillance in 2007. In this study the authors present their first clinical results using the method, which they recently introduced for the first time in Bulgaria. A total of 1356 CTG recordings with pH prediction were stored and analysed. These findings have been carefully taken into consideration in the context of some clinical conditions like preeclampsia, pre- and post-term delivery placental abruption, etc. Early results are showing fairly good correlation between computer-analysed abnormal CTG findings and presence of the above mentioned clinical conditions.
Conclusions:
Quantitative appraisal of CTG findings and acid-base parameters leads to much more precise interpretation of the CTG phenomena, which guarantees higher quality of fetal surveillance during pregnancy and labor.
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