Keyword search (4,163 papers available)

"Nigam A" Authored Publications:

Title Authors PubMed ID
1 Cardiorespiratory fitness in relation to cerebral vascular and metabolic health in older adults with coronary artery disease Sanami S; Tremblay SA; Potvin-Jutras Z; Rezaei A; Sabra D; Gagnon C; Intzandt B; Mainville-Berthiaume A; Wright L; Gayda M; Iglesies-Grau J; Nigam A; Bherer L; Gauthier CJ; 41680492
SOH
2 Greater cardiorespiratory fitness is associated with higher cerebral blood flow and lower oxygen extraction fraction in healthy older adults Sanami S; Rezaei A; Tremblay SA; Potvin-Jutras Z; Sabra D; Intzandt B; Gagnon C; Mainville-Berthiaume A; Wright L; Gayda M; Iglesies-Grau J; Nigam A; Bherer L; Gauthier CJ; 41543005
SOH
3 The Impact of Coronary Artery Disease on Brain Vascular and Metabolic Health: Links to Cognitive Function Sanami S; Tremblay SA; Rezaei A; Potvin-Jutras Z; Sabra D; Intzandt B; Gagnon C; Mainville-Berthiaume A; Wright L; Gayda M; Iglesies-Grau J; Nigam A; Bherer L; Gauthier CJ; 41452711
SOH
4 Multivariate white matter microstructure alterations in older adults with coronary artery disease Tremblay SA; Potvin-Jutras Z; Sabra D; Rezaei A; Sanami S; Gagnon C; Intzandt B; Mainville-Berthiaume A; Wright L; Leppert IR; Tardif CL; Steele CJ; Iglesies-Grau J; Nigam A; Bherer L; Gauthier CJ; 40829939
SOH
5 Investigating the effects of a randomized, double-blinded aerobic, resistance, and cognitive training clinical trial on neurocognitive function in older adults with cardiovascular risk factors: the ACTIONcardioRisk protocol Bherer L; Vrinceanu T; Dupuy EG; Gayda M; Vincent T; Magnan PO; Mohammadi H; Gauthier C; Gagnon C; Duchesne S; Erickson KI; Gagnon D; Lesage F; Lupien S; Poirier J; Dubé MP; Thorin É; Juneau M; Breton J; Belleville S; Ferland G; Gaudreau-Majeau F; Blanchette CA; Vitali P; Nigam A; 40625372
PSYCHOLOGY
6 Multiple routes to help you roam: A comparison of training interventions to improve cognitive-motor dual-tasking in healthy older adults Downey R; Bherer L; Pothier K; Vrinceanu T; Intzandt B; Berryman N; Lussier M; Vincent T; Karelis AD; Nigam A; Vu TTM; Bosquet L; Li KZH; 36408116
PERFORM
7 A comparison of the effect of physical activity and cognitive training on dual-task performance in older adults Vrinceanu T; Blanchette CA; Intzandt B; Lussier M; Pothier K; Vu TTM; Nigam A; Bosquet L; Karelis AD; Li KZH; Berryman N; Bherer L; 34865009
PERFORM
8 A comparison of physical exercise and cognitive training interventions to improve determinants of functional mobility in healthy older adults Pothier K; Vrinceanu T; Intzandt B; Bosquet L; Karelis AD; Lussier M; Vu TTM; Nigam A; Li KZH; Berryman N; Bherer L; 33774144
PERFORM
9 Cerebral Hemodynamics During Exercise and Recovery in Heart Transplant Recipients. Gayda M, Desjardins A, Lapierre G, Dupuy O, Fraser S, Bherer L, Juneau M, White M, Gremeaux V, Labelle V, Nigam A 26577897
PERFORM
10 Cognitive function in patients with stable coronary heart disease: Related cerebrovascular and cardiovascular responses. Gayda M, Gremeaux V, Bherer L, Juneau M, Drigny J, Dupuy O, Lapierre G, Labelle V, Fortier A, Nigam A 28937981
PERFORM

 

Title:Cerebral Hemodynamics During Exercise and Recovery in Heart Transplant Recipients.
Authors:Gayda M,  Desjardins A,  Lapierre G,  Dupuy O,  Fraser S,  Bherer L,  Juneau M,  White M,  Gremeaux V,  Labelle V,  Nigam A
Link:https://www.ncbi.nlm.nih.gov/pubmed/26577897?dopt=Abstract
DOI:10.1016/j.cjca.2015.07.011
Publication:The Canadian journal of cardiology
Keywords:
PMID:26577897 Category:Can J Cardiol Date Added:2019-04-15
Dept Affiliation: PERFORM
1 Cardiovascular Prevention and Rehabilitation Centre (ÉPIC), Montréal Heart Institute and University of Montréal, Montréal, Québec, Canada; Research Center, Montreal Heart Institute and University of Montréal, Montréal, Québec, Canada; Department of Medicine, Faculty of Medicine, University of Montréal, Montréal, Québec, Canada. Electronic address: mathieu.gayda@icm-mhi.org.
2 Cardiovascular Prevention and Rehabilitation Centre (ÉPIC), Montréal Heart Institute and University of Montréal, Montréal, Québec, Canada; Research Center, Montreal Heart Institute and University of Montréal, Montréal, Québec, Canada; Department of Medicine, Faculty of Medicine, University of Montréal, Montréal, Québec, Canada.
3 Cardiovascular Prevention and Rehabilitation Centre (ÉPIC), Montréal Heart Institute and University of Montréal, Montréal, Québec, Canada; Research Center, Montreal Heart Institute and University of Montréal, Montréal, Québec, Canada.
4 Laboratory, MOVE (EA6314), Faculty of Sport Sciences, Université de Poitiers, Poitiers, France.
5 Cardiovascular Prevention and Rehabilitation Centre (ÉPIC), Montréal Heart Institute and University of Montréal, Montréal, Québec, Canada; The School of Social Work, McGill University, Montréal, Québec, Canada.
6 Department of Psychology, Perform Centre, Concordia University, Montréal, Québec, Canada; Research Centre, Institut Universitaire de Gériatrie de Montréal, Montréal, Québec, Canada.
7 Research Center, Montreal Heart Institute and University of Montréal, Montréal, Québec, Canada; Department of Medicine, Faculty of Medicine, University of Montréal, Montréal, Québec, Canada.
8 CIC INSERM 1432, Plateforme d'Investigation Technologique, Dijon University Hospital, Dijon, France.
9 Research Centre, Institut Universitaire de Gériatrie de Montréal, Montréal, Québec, Canada.

Description:

Cerebral Hemodynamics During Exercise and Recovery in Heart Transplant Recipients.

Can J Cardiol. 2016 Apr;32(4):539-46

Authors: Gayda M, Desjardins A, Lapierre G, Dupuy O, Fraser S, Bherer L, Juneau M, White M, Gremeaux V, Labelle V, Nigam A

Abstract

BACKGROUND: The aims of this work were (1) to compare cerebral oxygenation-perfusion (COP), central hemodynamics, and peak oxygen uptake (V?o2peak) in heart transplant recipients (HTRs) vs age-matched healthy controls (AMHCs) during exercise and recovery and (2) to study the relationships between COP, central hemodynamics, and V?o2peak in HTRs and AMHCs.

METHODS: Twenty-six HTRs (3 women) and 27 AMHCs (5 women) were recruited. Maximal cardiopulmonary function (gas exchange analysis), cardiac hemodynamics (impedance cardiography), and left frontal COP (near-infrared spectroscopy) were measured continuously during and after a maximal ergocycle (Ergoline 800S, Bitz, Germany) test.

RESULTS: Compared with AMHCs, HTRs had lower V?o2peak, maximal cardiac index (CImax), and maximal ventilatory variables (P < 0.05). COP was lower during exercise (oxyhemoglobin [?O2Hb], 50% and 75% of V?O2peak, total hemoglobin [?tHb], 100% of V?O2peak; P < 0.05), and recovery in HTRs (?O2Hb, minutes 2-5; ?tHb, minutes 1-5; P < 0.05) compared with AMHCs. End-tidal pressure of CO2 was lower during exercise compared with that in AMHCs (P < 0.0001). In HTRs, CImax was positively correlated with exercise cerebral hemodynamics (R = 0.54-0.60; P < 0.01).

CONCLUSIONS: In HTRs, COP was reduced during exercise and recovery compared with that in AMHCs, potentially because of a combination of blunted cerebral vasodilation by CO2, cerebrovascular dysfunction, reduced cardiac function, and medication. The impaired V?O2peak observed in HTRs was mainly caused by reduced maximal ventilation and CI. In HTRs, COP is impaired and is correlated with cardiac function, potentially impacting cognitive function. Therefore, we need to study which interventions (eg, exercise training) are most effective for improving or normalizing (or both) COP during and after exercise in HTRs.

PMID: 26577897 [PubMed - indexed for MEDLINE]




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