Guido Ferretti

Summary

Affiliation: University of Geneva
Country: Switzerland

Publications

  1. ncbi Extreme human breath-hold diving
    G Ferretti
    Department of Physiology, University Medical Centre, 1 rue Michel Servet, 1211 Geneva 4, Switzerland
    Eur J Appl Physiol 84:254-71. 2001
  2. ncbi The effects of beta1-adrenergic blockade on cardiovascular oxygen flow in normoxic and hypoxic humans at exercise
    Guido Ferretti
    Departement de Physiologie, Centre Medical Universitaire, Geneva, Switzerland
    Eur J Appl Physiol 95:250-9. 2005
  3. ncbi Limiting factors to oxygen transport on Mount Everest 30 years after: a critique of Paolo Cerretelli's contribution to the study of altitude physiology
    Guido Ferretti
    Laboratorio di Fisiologia Umana, Dipartimento di Scienze Biomediche e Biotecnologie, Universita di Brescia, Viale Europa 11, 25100 Brescia, Italy
    Eur J Appl Physiol 90:344-50. 2003
  4. ncbi Diversity in and adaptation to breath-hold diving in humans
    Guido Ferretti
    Department of Physiology, University Medical Centre, 1 rue Michel Servet, CH 1211 4, Geneva, Switzerland
    Comp Biochem Physiol A Mol Integr Physiol 136:205-13. 2003
  5. doi Phase I dynamics of cardiac output, systemic O2 delivery, and lung O2 uptake at exercise onset in men in acute normobaric hypoxia
    Frédéric Lador
    Département de Neurosciences Fondamentales, Centre Medical Universitaire, 1 rue Michel Servet, CH 1211 Geneve 4, Switzerland
    Am J Physiol Regul Integr Comp Physiol 295:R624-32. 2008
  6. doi Cardiac output, O2 delivery and VO2 kinetics during step exercise in acute normobaric hypoxia
    Frédéric Lador
    Département des Neurosciences Fondamentales, Centre Medical Universitaire, Geneve, 1 rue Michel Servet, 1211 Geneva 4, Switzerland
    Respir Physiol Neurobiol 186:206-13. 2013
  7. doi Cardiovascular time courses during prolonged immersed static apnoea
    Renza Perini
    Dipartimento di Scienze Biomediche e Biotecnologie, Sezione di Fisiologia Umana, Universita di Brescia, Brescia, Italy
    Eur J Appl Physiol 110:277-83. 2010
  8. ncbi Cardiovascular determinants of maximal oxygen consumption in upright and supine posture at the end of prolonged bed rest in humans
    Aurélien Bringard
    Département des Neurosciences Fondamentales, Centre Medical Universitaire, 1 rue Michel Servet, CH 1211 Geneve 4, Switzerland
    Respir Physiol Neurobiol 172:53-62. 2010
  9. ncbi Simultaneous determination of the kinetics of cardiac output, systemic O(2) delivery, and lung O(2) uptake at exercise onset in men
    Frédéric Lador
    Departement de Physiologie, Centre Medical Universitaire, 1 rue Michel Servet, 1211 Geneve 4, Switzerland
    Am J Physiol Regul Integr Comp Physiol 290:R1071-9. 2006
  10. doi Prolonged head down bed rest-induced inactivity impairs tonic autonomic regulation while sparing oscillatory cardiovascular rhythms in healthy humans
    Guido Ferretti
    Département de Neurosciences Fondamentales, Centre Medical Universitaire, Geneve, Switzerland
    J Hypertens 27:551-61. 2009

Collaborators

Detail Information

Publications24

  1. ncbi Extreme human breath-hold diving
    G Ferretti
    Department of Physiology, University Medical Centre, 1 rue Michel Servet, 1211 Geneva 4, Switzerland
    Eur J Appl Physiol 84:254-71. 2001
    ..The ultimate limit to breath-hold diving records may indeed be imposed by an energetic constraint...
  2. ncbi The effects of beta1-adrenergic blockade on cardiovascular oxygen flow in normoxic and hypoxic humans at exercise
    Guido Ferretti
    Departement de Physiologie, Centre Medical Universitaire, Geneva, Switzerland
    Eur J Appl Physiol 95:250-9. 2005
    ..The two observed relationships between QvO(2) and SaO(2) apply to conditions of predominant sympathetic or vagal activation, respectively. Moving from one line to the other implies resetting of the cardiovascular regulation...
  3. ncbi Limiting factors to oxygen transport on Mount Everest 30 years after: a critique of Paolo Cerretelli's contribution to the study of altitude physiology
    Guido Ferretti
    Laboratorio di Fisiologia Umana, Dipartimento di Scienze Biomediche e Biotecnologie, Universita di Brescia, Viale Europa 11, 25100 Brescia, Italy
    Eur J Appl Physiol 90:344-50. 2003
    ..This analysis is followed by a short account of Cerretelli's more recent work, with a special attention to the subject of the so-called "lactate paradox"...
  4. ncbi Diversity in and adaptation to breath-hold diving in humans
    Guido Ferretti
    Department of Physiology, University Medical Centre, 1 rue Michel Servet, CH 1211 4, Geneva, Switzerland
    Comp Biochem Physiol A Mol Integr Physiol 136:205-13. 2003
    ..It is not possible to state, however, whether these changes reflect genetic adaptations or an adaptive response to a prolonged environmental stress...
  5. doi Phase I dynamics of cardiac output, systemic O2 delivery, and lung O2 uptake at exercise onset in men in acute normobaric hypoxia
    Frédéric Lador
    Département de Neurosciences Fondamentales, Centre Medical Universitaire, 1 rue Michel Servet, CH 1211 Geneve 4, Switzerland
    Am J Physiol Regul Integr Comp Physiol 295:R624-32. 2008
    ..Thus the dual origin of the phase I of Q and QaO2, neural (vagal) and mechanical (venous return increase by muscle pump action), would rather be confirmed...
  6. doi Cardiac output, O2 delivery and VO2 kinetics during step exercise in acute normobaric hypoxia
    Frédéric Lador
    Département des Neurosciences Fondamentales, Centre Medical Universitaire, Geneve, 1 rue Michel Servet, 1211 Geneva 4, Switzerland
    Respir Physiol Neurobiol 186:206-13. 2013
    ....
  7. doi Cardiovascular time courses during prolonged immersed static apnoea
    Renza Perini
    Dipartimento di Scienze Biomediche e Biotecnologie, Sezione di Fisiologia Umana, Universita di Brescia, Brescia, Italy
    Eur J Appl Physiol 110:277-83. 2010
    ..This pattern suggests that the chronotropic control via the baroreflex is modified during apnoea. These cardiovascular changes during immersed static apnoea are in agreement with those already reported for static dry apnoeas...
  8. ncbi Cardiovascular determinants of maximal oxygen consumption in upright and supine posture at the end of prolonged bed rest in humans
    Aurélien Bringard
    Département des Neurosciences Fondamentales, Centre Medical Universitaire, 1 rue Michel Servet, CH 1211 Geneve 4, Switzerland
    Respir Physiol Neurobiol 172:53-62. 2010
    ..We speculate that impaired peripheral oxygen transfer and/or utilisation may explain the VO₂max decrease supine and the fraction of VO₂max decrease upright unexplained by cardiovascular responses...
  9. ncbi Simultaneous determination of the kinetics of cardiac output, systemic O(2) delivery, and lung O(2) uptake at exercise onset in men
    Frédéric Lador
    Departement de Physiologie, Centre Medical Universitaire, 1 rue Michel Servet, 1211 Geneve 4, Switzerland
    Am J Physiol Regul Integr Comp Physiol 290:R1071-9. 2006
    ..We suggest that in unsteady states, lung Vo(2) is dissociated from muscle O(2) consumption. The two components of Q and QaO(2) kinetics may reflect vagal withdrawal and sympathetic activation...
  10. doi Prolonged head down bed rest-induced inactivity impairs tonic autonomic regulation while sparing oscillatory cardiovascular rhythms in healthy humans
    Guido Ferretti
    Département de Neurosciences Fondamentales, Centre Medical Universitaire, Geneve, Switzerland
    J Hypertens 27:551-61. 2009
    ..Clinical and epidemiological investigations suggest, beyond molecular changes, the possibility of an induced impairment in autonomic cardiovascular regulation. However, this hypothesis has not been tested directly...
  11. doi Heart rate and blood pressure time courses during prolonged dry apnoea in breath-hold divers
    Renza Perini
    Dipartimento di Scienze Biomediche e Biotecnologie, Sezione di Fisiologia Umana, Universita di Brescia, Viale Europa 11, Brescia, Italy
    Eur J Appl Physiol 104:1-7. 2008
    ..Further readjustment in group B may imply a role for both baroreflexes and chemoreflexes. Hypothesis has been made that the end of phase II corresponds to physiological breakpoint...
  12. doi Energetics of running in top-level marathon runners from Kenya
    Enrico Tam
    Département de Neurosciences Fondamentales, Universite de Geneve, Geneva, Switzerland
    Eur J Appl Physiol 112:3797-806. 2012
    ..In conclusion, both KA and EC did not have a very high VO2max, but had extremely high Fd, and low Cr, equal between them. The dominance of KA over EC cannot be explained on energetic grounds...
  13. doi Determinants of oxygen consumption during exercise on cycle ergometer: the effects of gravity acceleration
    Julien Bonjour
    Département de Neurosciences Fondamentales, Universite de Geneve, Geneva, Switzerland
    Respir Physiol Neurobiol 171:128-34. 2010
    ..In conclusion, the effects of a(g) on VO2 are mediated through changes in E (i), and not in w or in resting VO2...
  14. doi Cardiovascular re-adjustments and baroreflex response during clinical reambulation procedure at the end of 35-day bed rest in humans
    Alessandra Adami
    a Département de Neuroscience Fondamentales, Centre Medical Universitaire, Universite de Geneve, 1 rue Michel Servet, CH 1211 Geneve 4, Switzerland
    Appl Physiol Nutr Metab 38:673-80. 2013
    ..INT, in contrast with tolerant subjects, did not sustain standing because HR was unable to correct for the P̄ drop. These results indicate a major role for impaired arterial baroreflexes in the onset of orthostatic intolerance...
  15. ncbi Maximal O(2) consumption: Effects of gravity withdrawal and resumption
    Guido Ferretti
    Dipartimento di Scienze Biomediche e Biotecnologie, Universita di Brescia, Italy
    Respir Physiol Neurobiol 169:S50-4. 2009
    ..Countermeasures centred on gravity application during space flight should be given priority...
  16. doi Effects of step duration in incremental ramp protocols on peak power and maximal oxygen consumption
    Alessandra Adami
    Département de Neuroscience Fondamentales, Centre Medical Universitaire, Universite de Geneve, 1 rue Michel Servet, 1211, Geneve 4, Switzerland
    Eur J Appl Physiol 113:2647-53. 2013
    ..The aim of this study was to test this hypothesis by validating Morton's model using stepwise ramp tests with invariant step increment and increasing step duration...
  17. doi An analysis of performance in human locomotion
    Guido Ferretti
    Département des Neurosciences Fondamentales, Centre Medical Universitaire, Universite de Geneve, Rue Michel Servet 1, 1211, Geneve 4, Switzerland
    Eur J Appl Physiol 111:391-401. 2011
    ..Special attention is given to the role of air resistance and frictional forces. Finally, computation of performance speed is discussed along the approach originally developed by di Prampero...
  18. ncbi Cardiac output by Modelflow method from intra-arterial and fingertip pulse pressure profiles
    Marcel Azabji Kenfack
    Departement de Physiologie, Centre Medical Universitaire, 1 rue Michel Servet, CH 1211 Geneve 4, Switzerland
    Clin Sci (Lond) 106:365-9. 2004
    ....
  19. doi The Q˙-V˙O2 diagram: an analytical interpretation of oxygen transport in arterial blood during exercise in humans
    Alessandra Adami
    Département de Neurosciences Fondamentales, Universite de Geneve, 1 rue Michel Servet, CH 1211 Geneve 4, Switzerland
    Respir Physiol Neurobiol 193:55-61. 2014
    ....
  20. ncbi The heart rate response to exercise and circulating catecholamines in heart transplant recipients
    Guido Ferretti
    Departement de Physiologie, Centre Medical Universitaire, 1 rue Michel Servet, 1211 Geneve 4, Switzerland
    Pflugers Arch 443:370-6. 2002
    ..These findings suggest that over time sympathetic reinnervation and the modulation of beta-receptors may take place in HTR, ruling out the hypothesis of persistent heart denervation...
  21. ncbi Age-related heart rate response to exercise in heart transplant recipients. Functional significance
    Claudio Marconi
    Muscle Physiology and Proteome Section of IBFM, National Research Council, L I T A, Via Fratelli Cervi 93, 20090 Segrate, Milano, Italy
    Pflugers Arch 443:698-706. 2002
    ..The latter finding is probably attributable to peripheral limitations, due to inborn and/or pharmacological muscle deterioration...
  22. ncbi Energy cost of walking and running at extreme uphill and downhill slopes
    Alberto E Minetti
    Centre for Biophysical and Clinical Research into Human Movement, Department of Exercise and Sport Science, Manchester Metropolitan University, Alsager, Cheshire ST7 2HL, United Kingdom
    J Appl Physiol 93:1039-46. 2002
    ..The estimated maximum running speeds on positive gradients corresponded to those adopted in uphill races; on negative gradients they were well above those attained in downhill competitions...
  23. ncbi Correction of cardiac output obtained by Modelflow from finger pulse pressure profiles with a respiratory method in humans
    Enrico Tam
    Dipartimento di Scienze e Tecnologie Biomediche, School of Medicine, P le Kolbe 4, I 33100, Udine, Italy
    Clin Sci (Lond) 106:371-6. 2004
    ..05 litre x min(-1). In conclusion, after correction by an independent method, Modelflow was found to be a reliable and accurate procedure for measuring Q in humans at rest and exercise, and it can be proposed for routine purposes...
  24. pmc Calf venous volume during stand-test after a 90-day bed-rest study with or without exercise countermeasure
    Eric Belin de Chantemele
    Laboratoire de Physiologie de l Environnement, Faculte de Medecine Lyon Grange Blanche, Lyon, France
    J Physiol 561:611-22. 2004
    ..It also showed that a combined eccentric-concentric resistance exercise countermeasure had no effects on either post-HDT OI or on the venous parameters related to it...