Purpose: Jellyfish plaque is defined as “the entire plaque surface or a part of the surface deforms with arterial pulsation”. This study was aimed to clarify the relationship between movement of jellyfish plaque and pulsatile blood flow.
Methods: We performed carotid ultrasonography for 502 patients with cervical carotid stenosis from November 2016 to March 2020. A total of 38 patients with jellyfish plaque was detected. Among them, we evaluated jellyfish plaque of 26 lesions in 22 patients (22 males, median age: 76 years old ranging 60–86), who were able to simultaneously record B-mode and pulsed-wave Doppler imaging (PWD), were retrospectively verified. Sample volume was set in the blood vessel lumen near jellyfish plaque, and B-mode and PWD were simultaneously recorded. Phase of the plaque surface movement (i.e. ups and downs) was analyzed by the waveform of the blood flow in PWD.
Results and Discussion: All subjects demonstrated the plaque surface movement as lowest in the peak of systolic velocity through highest in the end of diastolic velocity.
Conclusion: Arterial pulsation was presumed to influence on the movement of jellyfish plaque surface. To refer arterial beat and periodical plaque movement would help identify this fragile type of plaques.