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. 2026 Jan 12;12:1742605. doi: 10.3389/fcvm.2025.1742605

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© 2026 Huang, Luo, Pan, Jiang and Ma.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Graphs showing sleep study data with wave patterns and annotations. Graph A displays waveforms and highlighted sections across time intervals. Graph B shows denser waveforms with similar annotations and additional highlighted areas. — (A,B) The patient underwent sleep monitoring using the SOMNOscreen plus PSG+ system. The results indicated disrupted sleep architecture, with an increased duration of REM sleep and an absence of N3 stage sleep. Airflow monitoring revealed the presence of sleep apnea episodes accompanied by oxygen desaturation during respiratory events, with no significant changes in heart rate observed. Based on the thoracoabdominal movement patterns, a diagnosis of central sleep apnea-hypopnea syndrome was established. (A) Presented in 30 s epochs, clearly demonstrates the patient's sleep stages. (B) Displayed in 5 min epochs, provides a clear overview of the sleep respiratory events and corresponding oxygen desaturation.