Hemodynamic effect of intravenous lidocaine during aortic cannulation in cardiac surgery

Background Dissection of aorta is a rare, but fatal complication of aortic cannulation in cardiac surgery can be caused by the sudden rise in blood pressure and hemodynamic variations. Methods In this study, 90 patients aged 18 years or older undergoing cardiac surgery were divided into two equal groups. Under similar conditions, trial group received 1.5 mg/kg of lidocaine for 90 s before cannulation and control group received normal saline. Hemodynamic parameters of patients including systolic blood pressure (SBP), diastolic blood pressure (DBP), mean arterial pressure (MAP), heart rate (HR), and central venous pressure before cannulation and 1, 3, and 5 min after cannulation were recorded in a form. Consumed nitroglycerin (TNG) rate was also measured and recorded. Results In the lidocaine group, compared with the placebo group, mean SBP, DBP, and MAP significantly reduced after cannulation (P < 0.05). During the follow-up period, mean HR (P = 0.649) and TNG usage (P = 0.527) were similar in two groups. Conclusion Intravenous lidocaine, 1.5 mg/kg, 90 s before cannulation leads to a reduction in SBP, DBP, and MAP, up to 5 min after cannulation, so it can decrease risk of aortic dissection.

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