• Tumul Chowdhury and Bernhard Schaller.
• Department of Anesthesiology and Perioperative Medicine, University of Manitoba, Winnipeg, Manitoba, Canada Department of Research, University of Southampton, Southampton, UK.
• Medicine (Baltimore). 2017 Jan 1; 96 (1): e5436.

BackgroundHemodynamic perturbations in spine surgeries are predominantly reported in cervical and thoracic level procedures. The literature related to negative cardiovascular changes (decrease of heart rate and blood pressure) in lumbar spine procedures is still scarce and only highlighted in few case reports/letters until now.MethodsWith the help of a systematic literature review with predefined criteria, we, therefore, examined and synthesized here the probable underlying common cause of these hemodynamic disturbances in lumbar spine surgeries. Data aggregation to a model was done by a case survey method and established by a cause-effect relationship.ResultsThere are only 5 cases that met our strict predefined criteria and that were aggregated to an emergent model of an autonomous reflex arc.ConclusionThis review and consecutive data aggregation provides, for the first time, a concept of spinal cardiac reflex in lumbar spine surgeries.

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