Stellate ganglion phototherapy for electrical storm during mechanical circulatory support in acute coronary syndrome: a case series

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ID: 338062
2026
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Abstract
Abstract Background Electrical storm (ES) during mechanical circulatory support (MCS) in the setting of acute coronary syndrome (ACS) represents a life-threatening condition driven by sympathetic hyperactivation and repolarization abnormalities. While stellate ganglion block (SGB) is recognized as an effective autonomic modulation strategy for drug-refractory ventricular arrhythmias, its use may raise concerns regarding bleeding complications in patients receiving systemic anticoagulation. Stellate ganglion phototherapy (SGP) is a non-invasive alternative, but its clinical utility for ES under MCS remains unclear. Case summary This case series describes two patients with drug-refractory ES complicating ACS during MCS management. Patient 1, a 78-year-old woman with cardiogenic shock, developed recurrent ventricular fibrillation (VF) with QT prolongation while on veno-arterial extracorporeal membrane oxygenation (ECMO). Overdrive pacing caused hemodynamic deterioration, and conventional antiarrhythmic drugs failed. Following SGP initiation, no further VF requiring electrical shocks occurred. ECMO was subsequently withdrawn. Patient 2, a 77-year-old man, developed recurrent torsades de pointes/VF with QT prolongation after left main revascularization under Impella support. Following SGP initiation, no further episodes requiring electrical shocks occurred. Impella was subsequently removed. Discussion SGP may represent a non-invasive autonomic modulation strategy for drug-refractory ES in ACS patients requiring MCS. Although concomitant therapies and gradual recovery from myocardial ischemia may have contributed to arrhythmia suppression, the temporal association suggests a potential contribution of SGP. SGP may serve as a bridge to recovery when invasive approaches pose additional challenges.
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Authors Yuki Arakawa, Takehiro Hashikata, Yuki Ikeda, Nobuhiro Sato, Hidehira Fukaya, Junya Ako
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Journal European Heart Journal - Case Reports
Year 2026
DOI
10.1093/ehjcr/ytag815
URL
https://academic.oup.com/ehjcr/advance-article-pdf/doi/10.1093/ehjcr/ytag815/72615115/ytag815.pdf
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