2005, Number 4
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Rev Mex Anest 2005; 28 (4)
Mobitz II AV block secondary to subarachnoid bupivacaine. Case report and review of the literature
Vargas-Trujillo C, Ángeles-de la Torre R, Molina-Méndez FJ, Rojas PE, Lespron RMC
Language: Spanish
References: 17
Page: 239-243
PDF size: 87.64 Kb.
ABSTRACT
Introduction: Bupivacaine has been clearly implicated as the cause of fatal ventricular arrhythmias, reduced myocardial contractility and cardiac output; decreased intracardiac conduction velocity; and sudden cardiovascular collapse. We report a case of cardiotoxic effects secondary to the administration of isobaric 0.5% subarachnoid bupivacaine.
Case summary: A 79-year-old female patient with left knee arthrosis was scheduled for total knee arthroplasty. Hypertension had been diagnosed three years ago and was currently treated with metoprolol. An EKG showed sinus bradycardia. Cardiac risk: Goldman II, ASA III A. Anesthetic management: sensory and motor L2-L3 blockade with 2 ml 0.5% subarachnoid bupivacaine. Thirty minutes into surgery, sinus bradycardia developed, down to 35 beats per minute, with no response to atropine, and progressing to Mobitz II atrioventricular block. Isoproterenol 2 μg/min infusion was started, achieving normal heart beat and blood pressure. Then, a temporary transvenous ventricular pacemaker was installed, with hemodynamic stability for the rest of the surgical time.
Conclusion: Cardiotoxicity due to local anesthetics is an uncommon but well documented complication of regional anesthesia. This case demonstrates the successful management of a patient who developed an atrioventricular block after a regional blockade with bupivacaine.
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