Deep hypothermic circulatory arrest: I

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Presentation transcript:

Deep hypothermic circulatory arrest: I Deep hypothermic circulatory arrest: I. Effects of cooling on electroencephalogram and evoked potentials Mark M Stecker, MD, PhD, Albert T Cheung, MD, Alberto Pochettino, MD, Glenn P Kent, BS, Terry Patterson, PhD, Stuart J Weiss, MD, PhD, Joseph E Bavaria, MD The Annals of Thoracic Surgery Volume 71, Issue 1, Pages 14-21 (January 2001) DOI: 10.1016/S0003-4975(00)01592-7

Fig 1 Distribution of nasopharyngeal temperatures at which various electroencephalogram (EEG) landmarks occur: (A) appearance of periodic complexes, (B) appearance of burst suppression, and (C) electrocerebral silence. Examples of typical EEG patterns during cooling are also shown: (D) precooling, (E) appearance of periodic complexes, (F) appearance of burst suppression, and (G) electrocerebral silence. Each of the EEG samples represents the following four channels recorded from the left hemisphere (Fp1-F7, F7-T3, T3-T5, and T5-O1). The Annals of Thoracic Surgery 2001 71, 14-21DOI: (10.1016/S0003-4975(00)01592-7)

Fig 2 (A) The cumulative probability of electrocerebral silence on electroencephalogram (EEG) as a function of cooling time. (B) The cumulative probability that electrocerebral silence (ECS) is not achieved for temperatures above that indicated. The Annals of Thoracic Surgery 2001 71, 14-21DOI: (10.1016/S0003-4975(00)01592-7)

Fig 3 The distribution of nasopharyngeal temperatures at which various evoked potential landmarks occur: (A) disappearance of N20-P22, and (B) disappearance of N13. Examples of typical evoked potential patterns during cooling are also shown: (C) precooling, (D) disappearance of N20-P22 and prolongation of the latency of N13, and (E) disappearance of N13. Each evoked potential trace represents the following two channels (C4′-C3′ and cervical7-Fpz). The Annals of Thoracic Surgery 2001 71, 14-21DOI: (10.1016/S0003-4975(00)01592-7)