Effect of PCO2 changes induced by head-upright tilt on transcranial Doppler recordings

Stroke; a Journal of Cerebral Circulation
S CencettiA Lagi

Abstract

Transcranial Doppler (TCD) monitoring of mean blood flow velocity (mV) during head-upright tilt can allow testing of cerebral autoregulation. Nonetheless, head-upright tilt can induce changes in the ventilation-perfusion relationship and/or respiratory activity that might influence TCD data. Forty-eight healthy volunteers underwent monitoring of mV and end-tidal CO2 in the horizontal position and during head-upright tilt. Both mV and end-tidal CO2 significantly decreased in orthostasis (P < .01). Linear regression analysis showed a significant linkage between end-tidal CO2 and mV changes (r = .83, P < .01). Changes in ventilation-perfusion ratio and in the respiratory pattern induced by head-upright tilt can significantly influence TCD data by determining a PCO2 decrease.

References

Jul 1, 1991·Journal of the Neurological Sciences·M DaffertshoferM Hennerici
Oct 1, 1994·Neurology·S F AmerisoM Fisher

❮ Previous
Next ❯

Citations

Jan 17, 2002·Clinical Autonomic Research : Official Journal of the Clinical Autonomic Research Society·D R Horowitz, H Kaufmann
Feb 14, 2006·European Journal of Applied Physiology·R V ImminkJ J van Lieshout
Oct 14, 2008·Clinical Autonomic Research : Official Journal of the Clinical Autonomic Research Society·John P HandrakisJill M Wecht
Apr 17, 2009·Clinical Autonomic Research : Official Journal of the Clinical Autonomic Research Society·Ronney B Panerai
Jan 22, 2013·Clinical Science·Shigehiko OgohTadayoshi Miyamoto
Jun 9, 2009·American Journal of Physiology. Heart and Circulatory Physiology·Anthony J OconJulian M Stewart
Jun 18, 2002·Acta Neurologica Scandinavica·J P OblakT Pogacnik
Jul 8, 2003·The Journal of Physiology·Gabrielle LeMarbreBarbara J Morgan
Mar 28, 2008·Disability and Rehabilitation·Vijay K Sharma
Jan 15, 2008·The Kaohsiung Journal of Medical Sciences·Vijay K Sharma, Bernard P L Chan
Sep 12, 2007·Therapeutic Apheresis and Dialysis : Official Peer-reviewed Journal of the International Society for Apheresis, the Japanese Society for Apheresis, the Japanese Society for Dialysis Therapy·Vijay Sharma, Bernard P Chan
Feb 26, 1999·The American Journal of the Medical Sciences·P A LowG W Petty
Jul 16, 2010·Journal of Psychiatric Research·Yuh-Jen WangHan-Hwa Hu
Mar 20, 2008·Journal of Cerebral Blood Flow and Metabolism : Official Journal of the International Society of Cerebral Blood Flow and Metabolism·Arenda Hea van BeekRené Wmm Jansen
Jul 17, 2007·Progress in Cardiovascular Diseases·Antonio Franco Folino
Aug 14, 2003·Clinical Physiology and Functional Imaging·Koichi KuriharaAsao Kobayashi
Sep 8, 2007·Annals of Neurology·Lucy Jane Norcliffe-KaufmannRoger Hainsworth
Jan 24, 2014·International Journal of Vascular Medicine·Jawad NaqviJonathan Ghosh
Jun 26, 2007·Orvosi hetilap·Krisztina BenedekLászló Rudas
Nov 8, 2017·Journal of Clinical Neurophysiology : Official Publication of the American Electroencephalographic Society·Antonio González-HermosilloClaudia Lerma
Dec 13, 2018·Physiological Reviews·Nandu GoswamiVictor A Convertino
Feb 9, 2018·Physiological Reports·Man Y LamRonney B Panerai
Aug 20, 2002·American Journal of Physiology. Regulatory, Integrative and Comparative Physiology·Michael R EdwardsRichard L Hughson
Feb 7, 2003·American Journal of Physiology. Regulatory, Integrative and Comparative Physiology·Michael R EdwardsRichard L Hughson
Jan 14, 2017·Journal of Applied Physiology·Anne-Sophie G T BronzwaerJohannes J van Lieshout
Feb 7, 2003·Journal of Applied Physiology·Johannes J Van LieshoutNiels H Secher
Jul 17, 2001·American Journal of Physiology. Heart and Circulatory Physiology·J SatoA Konno
Nov 5, 2011·Journal of Applied Physiology·Ken-Ichi IwasakiRyo Yanagida
Feb 2, 2013·Journal of Applied Physiology·K A ZujR L Hughson
Jul 20, 2002·Medicine and Science in Sports and Exercise·Michael R EdwardsRichard L Hughson
Jul 4, 2009·Journal of Applied Physiology·Rogier V ImminkJohannes J Van Lieshout
Sep 4, 1999·Physiological Measurement·R B PaneraiD H Evans
Nov 22, 2001·Journal of Applied Physiology·R SchondorfW Cupples
Aug 25, 2010·Journal of Ultrasound in Medicine : Official Journal of the American Institute of Ultrasound in Medicine·Yuh-Jen WangHan-Hwa Hu
Apr 30, 2003·Journal of Applied Physiology·A P BlaberP J Pretorius
Oct 10, 2020·Brain Communications·Joakim ÖlmestigChristina Kruuse

❮ Previous
Next ❯

Related Concepts

Trending Feeds

COVID-19

Coronaviruses encompass a large family of viruses that cause the common cold as well as more serious diseases, such as the ongoing outbreak of coronavirus disease 2019 (COVID-19; formally known as 2019-nCoV). Coronaviruses can spread from animals to humans; symptoms include fever, cough, shortness of breath, and breathing difficulties; in more severe cases, infection can lead to death. This feed covers recent research on COVID-19.

Blastomycosis

Blastomycosis fungal infections spread through inhaling Blastomyces dermatitidis spores. Discover the latest research on blastomycosis fungal infections here.

Nuclear Pore Complex in ALS/FTD

Alterations in nucleocytoplasmic transport, controlled by the nuclear pore complex, may be involved in the pathomechanism underlying multiple neurodegenerative diseases including Amyotrophic Lateral Sclerosis and Frontotemporal Dementia. Here is the latest research on the nuclear pore complex in ALS and FTD.

Applications of Molecular Barcoding

The concept of molecular barcoding is that each original DNA or RNA molecule is attached to a unique sequence barcode. Sequence reads having different barcodes represent different original molecules, while sequence reads having the same barcode are results of PCR duplication from one original molecule. Discover the latest research on molecular barcoding here.

Chronic Fatigue Syndrome

Chronic fatigue syndrome is a disease characterized by unexplained disabling fatigue; the pathology of which is incompletely understood. Discover the latest research on chronic fatigue syndrome here.

Evolution of Pluripotency

Pluripotency refers to the ability of a cell to develop into three primary germ cell layers of the embryo. This feed focuses on the mechanisms that underlie the evolution of pluripotency. Here is the latest research.

Position Effect Variegation

Position Effect Variagation occurs when a gene is inactivated due to its positioning near heterochromatic regions within a chromosome. Discover the latest research on Position Effect Variagation here.

STING Receptor Agonists

Stimulator of IFN genes (STING) are a group of transmembrane proteins that are involved in the induction of type I interferon that is important in the innate immune response. The stimulation of STING has been an active area of research in the treatment of cancer and infectious diseases. Here is the latest research on STING receptor agonists.

Microbicide

Microbicides are products that can be applied to vaginal or rectal mucosal surfaces with the goal of preventing, or at least significantly reducing, the transmission of sexually transmitted infections. Here is the latest research on microbicides.