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Hemorrhagic transformation (HT) is one of the major complications following vascular recanalization in patients with acute ischemic stroke (AIS), and early detection remains challenging. HT is closely related to abnormal cerebral hemodynamics. Previous studies have shown that shifts in the resonant frequency of an electromagnetic coupling LC circuit can dynamically respond to abnormal cerebral hemodynamics, enabling early identification and assessment of HT. Clinical study of 18 AIS patients(8 HT(+) patients, 10 HT(−) patients) demonstrated that the frequency shift peak(PFS) ratio (PFS of affected side /PFS of the contralateral side)and the area under the frequency shift curve(FSCA) ratio (FSCA of the affected side /FSCA of the contralateral side) were consistently elevated in the early postoperative period(0.94 ± 0.15 VS 1.49 ± 0.38, 0.90 ± 0.14 VS 1.52 ± 0.47). The PFS ratio achieved an accuracy of 83.3% in identifying HT, while the FSCA ratio reached 77.8%. This study indicates that electromagnetic coupling bedside monitoring technology can dynamically track abnormal cerebral hemodynamic changes after vascular recanalization in AIS patients, helping to identify HT risk and supporting clinical treatment strategies for AIS.

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Electromagnetic Coupling-Based Bedside Monitoring and Identification of Hemorrhagic Transformation Following Revascularization in Acute Ischemic Stroke

  • 会议论文

  • 发表日期：

    2026年

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  • Feng Wang,
  • Jia Xu,
  • Cheng Zhou,
  • Maoting Zhang,
  • Jian Sun,
  • Xianhua Hou

摘要

Hemorrhagic transformation (HT) is one of the major complications following vascular recanalization in patients with acute ischemic stroke (AIS), and early detection remains challenging. HT is closely related to abnormal cerebral hemodynamics. Previous studies have shown that shifts in the resonant frequency of an electromagnetic coupling LC circuit can dynamically respond to abnormal cerebral hemodynamics, enabling early identification and assessment of HT. Clinical study of 18 AIS patients(8 HT(+) patients, 10 HT(−) patients) demonstrated that the frequency shift peak(PFS) ratio (PFS of affected side /PFS of the contralateral side)and the area under the frequency shift curve(FSCA) ratio (FSCA of the affected side /FSCA of the contralateral side) were consistently elevated in the early postoperative period(0.94 ± 0.15 VS 1.49 ± 0.38, 0.90 ± 0.14 VS 1.52 ± 0.47). The PFS ratio achieved an accuracy of 83.3% in identifying HT, while the FSCA ratio reached 77.8%. This study indicates that electromagnetic coupling bedside monitoring technology can dynamically track abnormal cerebral hemodynamic changes after vascular recanalization in AIS patients, helping to identify HT risk and supporting clinical treatment strategies for AIS.