Bilateral cannulation of internal jugular veins may worsen intracranial hypertension.

36:97–100 5. Briard C, Corat P, Commin P, Chollet A, Menasche P, Echter E: Coronary artery spasm during non-cardiac surgical procedure. Anaesthesia 1983; 38:467–70 6. Buffington CW, Ivey TD: Coronary artery spasm during general anesthesia. ANESTHESIOLOGY 1981; 55:466–9 7. Skarvan K, Graedel E, Hasse J, Stulz P, Pfister M: Coronary artery spasms after coronary bypass surgery. ANESTHESIOLOGY 1984; 61:323–7 8. DeWolf AM, Kang YG: Coronary artery spasm and ST-segment depression (letter). ANESTHESIOLOGY 1985; 62:368 9. Krantz EM, Viljoen JF, Gilbert MS: Printzmetal’s variant angina during extradural anaesthesia. Br J Anaesth 1980; 52:945–9 10. Balagot RC, Selim H, Bandelin VR, Kwan BK, Ecanow B: Printzmetal’s variant angina in the immediate post-anesthetic state. ANESTHESIOLOGY 1977; 46: 355–7 11. Hoka S, Izumi K, Matsukado T, Matsuda K, Takashadi S: Coronary artery spasm induced under lumbar epidural anesthesia. Eur J Anaesthesiol 1995; 6:609–12 12. Yasue H, Yutaka H, Nakamura N, Fujii H, Imoto N, Sonoda R, Kugiyama K, Obata K, Morikami Y, Kimura T: Induction of coronary artery spasm by acetylcholine in patients with variant angina: Possible role of the parasympathetic nervous system in the pathogenesis of coronary artery spasm. Circulation 1986; 74:955–63 13. Baron JF, Payen D, Coriat P, Edouard A, Viars P: Forearm vascular tone and reactivity during lumbar epidural anesthesia. Anest Analg 1988; 67:1065–70 14. Taniguchi M, Kasaba T, Takasaki M: Epidural anesthesia enhances sympathetic activity in the unanesthetized segments in cats. Anest Analg 1997; 84: 391–7 15. Bugiardini R, Pozzati A, Ottani F, Morgangni GL, Puddu P: Vasotonic angina: A spectrum of ischemic syndromes involving functional abnormalities of the epicardial and microvascular coronary circulation. J Am Coll Cardiol 1993; 22:417–25 16. Fleisher LA, Frank SM, Shir Y, Estefanous M, Kelly S, Raja SN: Cardiac sympathovagal balance and peripheral sympathetic vasoconstriction: Epidural versus general anesthesia. Anest Analg 1994; 79:165–71