Could Phosphorous MR Spectroscopy Help Predict the Severity of Vasospasm? A Pilot Study

Area of Science:

• Neuroscience
• Medical Imaging
• Biochemistry

Background:

• Delayed cerebral ischemia following aneurysmal subarachnoid hemorrhage (aSAH) is a major cause of poor patient outcomes.
• Cerebral vasospasm is a key factor in this delayed ischemia.
• Emerging evidence suggests a potential role for cerebral magnesium and pH in vasospasm pathophysiology.

Purpose of the Study:

• To investigate the relationship between cerebral magnesium (Mg) and pH levels and the development of clinically significant vasospasm after aSAH.
• To utilize phosphorous magnetic resonance spectroscopy (31P-MRS) for quantitative assessment of these biochemical markers.

Main Methods:

• Phosphorous magnetic resonance spectroscopy (31P-MRS) was employed to measure cerebral Mg and pH levels.
• 13 patients with aSAH were included in the study.
• Cerebral Mg and pH values were compared between patients who developed vasospasm (n=7) and those who did not (n=6).

Main Results:

• Patients who developed clinically significant vasospasm exhibited significantly lower cerebral Mg levels (p=0.019).
• Higher cerebral pH levels (p<0.001) were observed in patients with vasospasm.
• These differences were noted in the cumulative analysis of all brain voxels.

Conclusions:

• Lower cerebral magnesium and higher pH levels are associated with the development of clinically significant vasospasm in aSAH patients.
• These findings suggest potential biomarkers for predicting vasospasm.
• Further research with larger patient cohorts is warranted to validate these results and improve vasospasm prediction.