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Journal Article
[Coronary artery spasm during anesthetic induction in a patient with bronchial asthma].
Masui. the Japanese Journal of Anesthesiology 1997 November
A 68-year-old man was scheduled for subtotal gastrectomy. He had bronchial asthma, but had no history of ischemic heart disease and showed normal ECG. He stopped taking antiasthmatic drugs after the admission. His operation had been postponed for 10 days for an attack of bronchial asthma. The asthmatic attack was suppressed by infusing aminophilline. Before the operation, general anesthesia combined with epidural anesthesia (mepivacaine; 60 mg) was induced. At the time of the insertion of a stomach tube, bradycardia (48 bpm) and hypotension (48/30 mmHg) with an elevation of ST-segment in ECG were observed. We administrated 10 mg of isosorbide dinitrate followed by continuous intravenous injection (0.5 mg.kg-1.min-1) of dopamine (6 mg.kg-1.min-1). After 20 minutes, increases of both blood pressure (82/49 mmHg) and heart rate (89 bpm) were achieved and ST-segment in ECG was reversed. The operation was postponed again. Although the patient had refused to take coronary angiogram, the episode was explained by coronary artery spasm. Pathogenesis of the spasm was likely to be 1) elevation of endogenous cathecolamine due to asthma, 2) inhibition of cardiac sympathetic system by epidural anesthesia and 3) stimulation of vagal system by the insertion of a stomach tube.
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