Clinical Scorecard: Ultrasound-Assisted Stellate Ganglion Block for Managing Refractory Sympathetically Mediated Arrhythmias After Acute Myocardial Infarction: A Guide and Case Illustrations

At a Glance

Key Highlights

• SGB successfully aborted electrical storm in all 5 patients (100%).
• Median defibrillations per patient decreased from 4 to 0 after SGB.
• Ipsilateral Horner syndrome confirmed successful sympathetic blockade.
• No procedure-related complications were observed.
• SGB serves as an adjunctive therapy to reduce repeated electrical defibrillation.

Guideline-Based Recommendations

Diagnosis

• Identify refractory sympathetically mediated arrhythmias post-AMI.

Management

• Consider ultrasound-guided SGB for patients unresponsive to standard medical management.

Monitoring & Follow-up

• Monitor for development of Horner syndrome as a sign of successful block.

Risks

• Potential for local anesthetic toxicity, though minimized with lower volume.

Patient & Prescribing Data

Five AMI patients of Han ethnicity, aged 29 to 87 years.

1% lidocaine hydrochloride used for SGB, with 5 mL being effective and safe.

Clinical Best Practices

• Perform SGB at the bedside or in a catheterization laboratory by trained anesthesiologists.
• Use ultrasound guidance to enhance safety and accuracy of the procedure.
• Prioritize patient safety by using lower volumes of local anesthetic in hemodynamically unstable patients.

Related Resources & Content

• STAR trial