The potent role of increased sympathetic tone in pathogenesis of essential hypertension with neurovascular compression
| Autor: | Motoshi Horita, Yachiyo Hoshiba, Rika Shinzato, Hiroshi Masuya, M Suzuki, Izumi Kitagawa, Noboru Takekoshi, T Morise |
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| Rok vydání: | 2000 |
| Předmět: |
Adult
Male Sympathetic nervous system Sympathetic Nervous System Secondary hypertension Essential hypertension Heart Rate Internal Medicine medicine Humans Vagal tone Medulla Oblongata Autonomic nerve business.industry Nerve Compression Syndromes Signal Processing Computer-Assisted Rostral ventrolateral medulla Middle Aged medicine.disease Neurovascular bundle Magnetic Resonance Imaging medicine.anatomical_structure Blood pressure nervous system Anesthesia Hypertension Female business |
| Zdroj: | Journal of Human Hypertension. 14:807-811 |
| ISSN: | 1476-5527 0950-9240 |
| DOI: | 10.1038/sj.jhh.1001114 |
| Popis: | To study the role of increased sympathetic tone in pathogenesis of hypertension in patients with essential hypertension with neurovascular compression.Twenty-three patients with essential hypertension, 13 patients with secondary hypertension, and 46 normotensive subjects were investigated. Neurovascular compression was evaluated by MRT. The power spectral components of heart rate variability as indices of autonomic nerve tone were determined to investigate the possibility that sympathetic tone mediates the neurovascular compression-induced increase in blood pressure.Neurovascular compression of the rostral ventrolateral medulla (RVLM) was observed in 70% of essential hypertension group, none of secondary hyperension group and 16% of normotensive group (P0.001). The age-adjusted low-frequency power spectral density (A-PSD) (0.04 to 0.15 Hz), which is an index of sympathetic tone, was significantly higher in patients with essential hypertension (139.5 +/- 6.7%) with neurovascular compression than in essential hypertension patients without neurovascular compression (92.2 +/- 6.8%), normotensive subjects with (102.8 +/- 13.0%) and without neurovascular compression (100.1 +/- 4.1%), and patients with secondary hypertension (95.7 +/- 10.2%) (P0.001). There was no significant difference in the high-frequency A-PSD (0.15 to 0.40 Hz), which is an index of vagal tone, among groups.Neurovascular compression was not always associated with an increase in sympathetic nerve tone. Hypertension was present in subjects with neurovascular compression, who had increased sympathetic tone but not in those with normal sympathetic tone. An increase in sympathetic tone may mediate the neurovascular compression-induced increase in blood pressure. Journal of Human Hypertension (2000) 14, 807-811 |
| Databáze: | OpenAIRE |
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