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Sakamoto R, Katayose M, Yamada Y, Neki T, Kamoda T, Tamai K, Yamazaki K, Iwamoto E. High-but not moderate-intensity exercise acutely attenuates hypercapnia-induced vasodilation of the internal carotid artery in young men. Eur J Appl Physiol 2021; 121:2471-2485. [PMID: 34028613 DOI: 10.1007/s00421-021-04721-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2020] [Accepted: 05/15/2021] [Indexed: 10/21/2022]
Abstract
PURPOSE Exercise-induced increases in shear rate (SR) across different exercise intensities may differentially affect hypercapnia-induced vasodilation of the internal carotid artery (ICA), a potential index of cerebrovascular function. We aimed to elucidate the effects of exercise intensity on ICA SR during exercise and post-exercise hypercapnia-induced vasodilation of the ICA in young men. METHODS Twelve healthy men completed 30 min of cycling at moderate [MIE; 65 ± 5% of age-predicted maximal heart rate (HRmax)] and high (HIE; 85 ± 5% HRmax) intensities. Hypercapnia-induced vasodilation was induced by 3 min of hypercapnia (target end-tidal partial pressure of CO2 + 10 mmHg) and was assessed at pre-exercise, 5 min and 60 min after exercise. Doppler ultrasound was used to measure ICA diameter and blood velocity during exercise and hypercapnia tests. RESULTS SR was not altered during either exercise (interaction and main effects of time; both P > 0.05). ICA conductance decreased during HIE from resting values (5.1 ± 1.3 to 3.2 ± 1.0 mL·min-1·mmHg-1; P < 0.01) but not during MIE (5.0 ± 1.3 to 4.0 ± 0.8 mL·min-1·mmHg-1; P = 0.11). Consequently, hypercapnia-induced vasodilation declined immediately after HIE (6.9 ± 1.7% to 4.0 ± 1.4%; P < 0.01), but not after MIE (7.2 ± 2.1% to 7.3 ± 1.8%; P > 0.05). Sixty minutes after exercise, hypercapnia-induced vasodilation returned to baseline values in both trials (MIE 8.0 ± 3.1%; HIE 6.4 ± 2.9%; both P > 0.05). CONCLUSION The present study showed blunted hypercapnia-induced vasodilation of the ICA immediately after high-intensity exercise, but not a moderate-intensity exercise in young men. Given that the acute response is partly linked to the adaptive response in the peripheral endothelial function, the effects of aerobic training on cerebrovascular health may vary depending on exercise intensity.
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Affiliation(s)
- Rintaro Sakamoto
- Department of Physical Therapy, Graduate School of Health Sciences, Sapporo Medical University, Sapporo, Japan
| | - Masaki Katayose
- School of Health Science, Sapporo Medical University, Sapporo, Japan
| | - Yutaka Yamada
- Department of Physical Therapy, Graduate School of Health Sciences, Sapporo Medical University, Sapporo, Japan
| | - Toru Neki
- School of Health Science, Sapporo Medical University, Sapporo, Japan
| | - Tatsuki Kamoda
- School of Health Science, Sapporo Medical University, Sapporo, Japan
| | - Katsuyuki Tamai
- School of Health Science, Sapporo Medical University, Sapporo, Japan
| | - Kotomi Yamazaki
- School of Health Science, Sapporo Medical University, Sapporo, Japan
| | - Erika Iwamoto
- School of Health Science, Sapporo Medical University, Sapporo, Japan.
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Huang X, Ngaenklangdon S, He J, Gao X. Traditional Chinese Medicine's liver yang ascendant hyperactivity pattern of essential hypertension and its treatment approaches: A narrative review. Complement Ther Clin Pract 2021; 43:101354. [PMID: 33706064 DOI: 10.1016/j.ctcp.2021.101354] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2020] [Revised: 03/01/2021] [Accepted: 03/02/2021] [Indexed: 12/24/2022]
Abstract
"Liver yang ascendant hyperactivity" (SF52), as termed by WHO, is a commonly observed pattern of essential hypertension (EH), herein referred to as EH-SF52. This paper summarizes the Traditional Chinese Medicine (TCM) perspectives, biomedical findings, and TCM managements for EH-SF52 in modern times. EH-SF52 is generally identified as an EH individual presenting with headache, dizziness, poor sleep quality, tinnitus, facial flushing, fatigue, signs of mild dehydration, and whom are highly irritable individuals with a tendency to overthink, be competitive, or be aggressive. The proposed EH-SF52 model features a state of autonomic imbalance and vascular changes that accounts for the above symptoms. TCM managements for EH-SF52 includes Chinese herbal medication, acupuncture, qigong, taichi, massage, food therapy, as well as lifestyle changes, which targets symptomatic alleviation and blood pressure reduction in a multi-mechanistic manner. An increasing shift towards integrated practice of TCM and western medicine in EH-SF52 requires effective communication between both disciplines.
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Affiliation(s)
- Xuhua Huang
- Tianjin State Key Laboratory of Modern Chinese Medicine, Tianjin University of Traditional Chinese Medicine, Tianjin, 301617, China; Tianjin University of Traditional Chinese Medicine, Tianjin, 301617, China
| | - Sakhorn Ngaenklangdon
- Tianjin University of Traditional Chinese Medicine, Tianjin, 301617, China; Faculty of Traditional Chinese Medicine, Nakhonratchasima College, Thailand
| | - Jun He
- Tianjin State Key Laboratory of Modern Chinese Medicine, Tianjin University of Traditional Chinese Medicine, Tianjin, 301617, China.
| | - Xiumei Gao
- Tianjin State Key Laboratory of Modern Chinese Medicine, Tianjin University of Traditional Chinese Medicine, Tianjin, 301617, China.
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Miller KB, Gallo SJ, Rivera-Rivera LA, Corkery AT, Howery AJ, Johnson SC, Rowley HA, Wieben O, Barnes JN. Vertebral artery hypoplasia influences age-related differences in blood flow of the large intracranial arteries. AGING BRAIN 2021; 1:100019. [PMID: 36911510 PMCID: PMC9997135 DOI: 10.1016/j.nbas.2021.100019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2020] [Revised: 05/26/2021] [Accepted: 06/01/2021] [Indexed: 11/16/2022] Open
Abstract
Our purpose was to compare cerebral blood flow in the large intracranial vessels between healthy adults with (VAH+) and without (No VAH) vertebral artery hypoplasia. We also evaluated age-related differences in regional blood flow through the large cerebral arteries. Healthy young (n = 20; age = 25 ± 3 years) and older adults (n = 19; age = 61 ± 5 years) underwent 4D flow MRI scans to evaluate blood flow in the internal carotid arteries (ICA) and basilar artery (BA). VAH was determined retrospectively from 4D flow MRI using both structural (vessel diameter ≤ 2 mm) and flow criteria (flow ≤ 50 mL/min). We identified 5 young and 5 older adults with unilateral VAH (prevalence = 26%). ICA flow was lower in the VAH+ group compared with the No VAH group (367 ± 75 mL/min vs. 432 ± 92 mL/min, respectively; p < 0.05). There was no difference in BA flow between VAH+ and No VAH (110 ± 20 mL/min vs. 126 ± 40 mL/min, respectively; p = 0.24). When comparing age-related differences in blood flow in the No VAH group, older adults demonstrated lower BA flow compared with young adults (111 ± 38 mL/min vs. 140 ± 38 mL/min, respectively; p < 0.05) but not ICA flow (428 ± 89 mL/min vs. 436 ± 98 mL/min, respectively; p = 0.82). In contrast, in the VAH+ group, older adults had lower ICA flow compared with young adults (312 ± 65 mL/min vs. 421 ± 35 mL/min, respectively; p < 0.01), but not BA flow (104 ± 16 mL/min vs. 117 ± 23 mL/min, respectively; p = 0.32). Our results suggest that the presence of VAH is associated with lower ICA blood flow. Furthermore, VAH may contribute to the variability in the age-related differences in cerebral blood flow in healthy adults.
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Affiliation(s)
- Kathleen B Miller
- Bruno Balke Biodynamics Laboratory, Department of Kinesiology, University of Wisconsin-Madison, Madison, WI, USA
| | - Samuel J Gallo
- Bruno Balke Biodynamics Laboratory, Department of Kinesiology, University of Wisconsin-Madison, Madison, WI, USA
| | - Leonardo A Rivera-Rivera
- Department of Medical Physics, University of Wisconsin School of Medicine and Public Health, Madison, WI, USA.,Wisconsin Alzheimer's Disease Research Center, University of Wisconsin School of Medicine and Public Health, Madison, WI, USA
| | - Adam T Corkery
- Bruno Balke Biodynamics Laboratory, Department of Kinesiology, University of Wisconsin-Madison, Madison, WI, USA
| | - Anna J Howery
- Bruno Balke Biodynamics Laboratory, Department of Kinesiology, University of Wisconsin-Madison, Madison, WI, USA
| | - Sterling C Johnson
- Wisconsin Alzheimer's Disease Research Center, University of Wisconsin School of Medicine and Public Health, Madison, WI, USA.,Geriatric Research Education and Clinical Center, William. S. Middleton Memorial Veterans Hospital, Madison, WI, USA
| | - Howard A Rowley
- Department of Radiology, University of Wisconsin School of Medicine and Public Health, Madison, WI, USA.,Wisconsin Alzheimer's Disease Research Center, University of Wisconsin School of Medicine and Public Health, Madison, WI, USA
| | - Oliver Wieben
- Department of Medical Physics, University of Wisconsin School of Medicine and Public Health, Madison, WI, USA.,Department of Radiology, University of Wisconsin School of Medicine and Public Health, Madison, WI, USA
| | - Jill N Barnes
- Bruno Balke Biodynamics Laboratory, Department of Kinesiology, University of Wisconsin-Madison, Madison, WI, USA
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