Preprint Review Version 1 Preserved in Portico This version is not peer-reviewed

Severe Refractory Vasoplegic Shock Syndrome After OPCABG: Our Experience and Review of Literature

Version 1 : Received: 13 November 2023 / Approved: 13 November 2023 / Online: 14 November 2023 (05:35:40 CET)

A peer-reviewed article of this Preprint also exists.

Bacchi, B.; Cabrucci, F.; Chiarello, B.; Dokollari, A.; Bonacchi, M. Severe Refractory Vasoplegic Shock Syndrome after OPCABG Successfully Treated with Hydroxycobalamin: A Case Report and Review of the Literature. J. Clin. Med. 2024, 13, 169. Bacchi, B.; Cabrucci, F.; Chiarello, B.; Dokollari, A.; Bonacchi, M. Severe Refractory Vasoplegic Shock Syndrome after OPCABG Successfully Treated with Hydroxycobalamin: A Case Report and Review of the Literature. J. Clin. Med. 2024, 13, 169.

Abstract

Abstract: Background: Vasoplegic shock syndrome(VSS) after an off-pump coronary artery bypass graft (OPCABG) is an extremely rare condition. Inotropic support is usually the first-line therapy though it can precipitate several complications or be ineffective. We report the first case of severe refractory VSS after OPCABG successfully treated with hydroxycobalamin. Methods: A 77-year-old gentleman underwent OPCABG for three vessels coronary artery disease. Preoperative LV ejection fraction was 28%, and the patient before surgery started sacubi-tril/valsartan titrated, then, to the highest dose. Surgery was uneventful and, by the end of the procedure, TEE showed improved biventricular contractility. Results: The patient was transferred to the ICU without inotropic support but he developed soon hypotension. TEE ruled out pericardial tamponade and confirmed fair contractility. Norepineph-rine was titrated to a medium-high dose, vasopressin was started and a Swan-Ganz catheter was placed. SVR was 480 dyn·s·cm−5. Despite aggressive pharmacologic treatment (including Methylprednisolone and Methylene blue), no improvements were noticed. 10 g of hydroxycobalamin were administered. One hour later hemodynamic status re-assessment showed SVR > 800 dyn·s·cm−5. Afterward, vasopressors were gradually reduced. Conclusions: Our case demonstrated the importance of adequate early treatment in VSS after OPCABG. For the first time, hydroxycobalamin was effectively used to restore homeostasis.

Keywords

Vasoplegic Shock Syndrome; Off-pump CABG; Hydroxycobalamin

Subject

Medicine and Pharmacology, Cardiac and Cardiovascular Systems

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