Monitoring of multimodality evoked potentials during open heart surgery under hypothermia

Omkar Markand, Carroll H. Warren, S. S. Moorthy, Robert K. Stoelting, Robert D. King

Research output: Contribution to journalArticle

67 Citations (Scopus)

Abstract

Multimodality evoked responses (ERs) were monitored in 16 adults who had cardiac surgery under cardiopulmonary bypass and moderate hypothermia (19-25°C). Cooling affected all sensory ERs by progressively increasing the latencies of the major components. The effect was more profound on the later than on the earlier ER components. Visual evoked responses (VERs) were most inconsistent and always disappeared at temperatures below 25°C. The later components of the long latency somatosensory evoked responses (SERs) also attenuated or disappeared rather early during hypothermia. On the other hand, short latency SERs were more resistant to the effects of hypothermia. They were always recordable at temperatures of 25°C or above; and usually persisted even at temperatures between 20 and 25°C. Brain-stem auditory evoked responses (BAERs) were consistently present at temperatures above 25°C, wave V was recordable in majority between 20 and 25°C. All sensory ERs disappeared with severe hypothermia (20°C or less) except the components generated more peripherally such as N10 of the short latency SERs. We feel that BAERs and short latency SERs may serve as useful intraoperative monitors of brain function during hypothermia.

Original languageEnglish
Pages (from-to)432-440
Number of pages9
JournalElectroencephalography and Clinical Neurophysiology/ Evoked Potentials
Volume59
Issue number6
DOIs
StatePublished - 1984

Fingerprint

Hypothermia
Evoked Potentials
Thoracic Surgery
Temperature
Visual Evoked Potentials
Brain Stem Auditory Evoked Potentials
Cardiopulmonary Bypass
Brain Stem
Reaction Time
Brain

ASJC Scopus subject areas

  • Clinical Neurology
  • Neuroscience(all)

Cite this

Monitoring of multimodality evoked potentials during open heart surgery under hypothermia. / Markand, Omkar; Warren, Carroll H.; Moorthy, S. S.; Stoelting, Robert K.; King, Robert D.

In: Electroencephalography and Clinical Neurophysiology/ Evoked Potentials, Vol. 59, No. 6, 1984, p. 432-440.

Research output: Contribution to journalArticle

Markand, Omkar ; Warren, Carroll H. ; Moorthy, S. S. ; Stoelting, Robert K. ; King, Robert D. / Monitoring of multimodality evoked potentials during open heart surgery under hypothermia. In: Electroencephalography and Clinical Neurophysiology/ Evoked Potentials. 1984 ; Vol. 59, No. 6. pp. 432-440.
@article{80ee41be211e45878acf78632761e137,
title = "Monitoring of multimodality evoked potentials during open heart surgery under hypothermia",
abstract = "Multimodality evoked responses (ERs) were monitored in 16 adults who had cardiac surgery under cardiopulmonary bypass and moderate hypothermia (19-25°C). Cooling affected all sensory ERs by progressively increasing the latencies of the major components. The effect was more profound on the later than on the earlier ER components. Visual evoked responses (VERs) were most inconsistent and always disappeared at temperatures below 25°C. The later components of the long latency somatosensory evoked responses (SERs) also attenuated or disappeared rather early during hypothermia. On the other hand, short latency SERs were more resistant to the effects of hypothermia. They were always recordable at temperatures of 25°C or above; and usually persisted even at temperatures between 20 and 25°C. Brain-stem auditory evoked responses (BAERs) were consistently present at temperatures above 25°C, wave V was recordable in majority between 20 and 25°C. All sensory ERs disappeared with severe hypothermia (20°C or less) except the components generated more peripherally such as N10 of the short latency SERs. We feel that BAERs and short latency SERs may serve as useful intraoperative monitors of brain function during hypothermia.",
author = "Omkar Markand and Warren, {Carroll H.} and Moorthy, {S. S.} and Stoelting, {Robert K.} and King, {Robert D.}",
year = "1984",
doi = "10.1016/0168-5597(84)90002-9",
language = "English",
volume = "59",
pages = "432--440",
journal = "Electroencephalography and Clinical Neurophysiology - Evoked Potentials",
issn = "0168-5597",
publisher = "Elsevier BV",
number = "6",

}

TY - JOUR

T1 - Monitoring of multimodality evoked potentials during open heart surgery under hypothermia

AU - Markand, Omkar

AU - Warren, Carroll H.

AU - Moorthy, S. S.

AU - Stoelting, Robert K.

AU - King, Robert D.

PY - 1984

Y1 - 1984

N2 - Multimodality evoked responses (ERs) were monitored in 16 adults who had cardiac surgery under cardiopulmonary bypass and moderate hypothermia (19-25°C). Cooling affected all sensory ERs by progressively increasing the latencies of the major components. The effect was more profound on the later than on the earlier ER components. Visual evoked responses (VERs) were most inconsistent and always disappeared at temperatures below 25°C. The later components of the long latency somatosensory evoked responses (SERs) also attenuated or disappeared rather early during hypothermia. On the other hand, short latency SERs were more resistant to the effects of hypothermia. They were always recordable at temperatures of 25°C or above; and usually persisted even at temperatures between 20 and 25°C. Brain-stem auditory evoked responses (BAERs) were consistently present at temperatures above 25°C, wave V was recordable in majority between 20 and 25°C. All sensory ERs disappeared with severe hypothermia (20°C or less) except the components generated more peripherally such as N10 of the short latency SERs. We feel that BAERs and short latency SERs may serve as useful intraoperative monitors of brain function during hypothermia.

AB - Multimodality evoked responses (ERs) were monitored in 16 adults who had cardiac surgery under cardiopulmonary bypass and moderate hypothermia (19-25°C). Cooling affected all sensory ERs by progressively increasing the latencies of the major components. The effect was more profound on the later than on the earlier ER components. Visual evoked responses (VERs) were most inconsistent and always disappeared at temperatures below 25°C. The later components of the long latency somatosensory evoked responses (SERs) also attenuated or disappeared rather early during hypothermia. On the other hand, short latency SERs were more resistant to the effects of hypothermia. They were always recordable at temperatures of 25°C or above; and usually persisted even at temperatures between 20 and 25°C. Brain-stem auditory evoked responses (BAERs) were consistently present at temperatures above 25°C, wave V was recordable in majority between 20 and 25°C. All sensory ERs disappeared with severe hypothermia (20°C or less) except the components generated more peripherally such as N10 of the short latency SERs. We feel that BAERs and short latency SERs may serve as useful intraoperative monitors of brain function during hypothermia.

UR - http://www.scopus.com/inward/record.url?scp=0021752499&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0021752499&partnerID=8YFLogxK

U2 - 10.1016/0168-5597(84)90002-9

DO - 10.1016/0168-5597(84)90002-9

M3 - Article

C2 - 6209110

AN - SCOPUS:0021752499

VL - 59

SP - 432

EP - 440

JO - Electroencephalography and Clinical Neurophysiology - Evoked Potentials

JF - Electroencephalography and Clinical Neurophysiology - Evoked Potentials

SN - 0168-5597

IS - 6

ER -