Hisayoshi Oka

Summary

Affiliation: Jikei University School of Medicine
Country: Japan

Publications

  1. ncbi request reprint Evaluation of baroreflex sensitivity by the sequence method using blood pressure oscillations and R-R interval changes during deep respiration
    Hisayoshi Oka
    Department of Neurology, Aoto Hospital, Jikei University School of Medicine, Tokyo, Japan
    Eur Neurol 50:230-43. 2003
  2. ncbi request reprint Cardiovascular dysautonomia in de novo Parkinson's disease
    Hisayoshi Oka
    Department of Neurology, Aoto Hospital, Jikei University School of Medicine, Tokyo, Japan
    J Neurol Sci 241:59-65. 2006
  3. ncbi request reprint Cardiovascular dysautonomia in Parkinson's disease and multiple system atrophy
    H Oka
    Department of Neurology, Aoto Hospital, Tokyo, Japan
    Acta Neurol Scand 113:221-7. 2006
  4. doi request reprint Reduced cardiac 123I-MIBG uptake reflects cardiac sympathetic dysfunction in de novo Parkinson's disease
    Hisayoshi Oka
    Department of Neurology, Daisan Hospital, The Jikei University School of Medicine, 4 11 1, Izumihoncho, Komae, Tokyo, 201 8601, Japan
    J Neural Transm (Vienna) 118:1323-7. 2011
  5. ncbi request reprint Cardiovascular autonomic dysfunction in dementia with Lewy bodies and Parkinson's disease
    Hisayoshi Oka
    Department of Neurology, Jikei University School of Medicine, 3 25 8, Nishi Shinbashi, Tokyo, 105 8461, Japan
    J Neurol Sci 254:72-7. 2007
  6. ncbi request reprint Impaired cardiovascular autonomic function in Parkinson's disease with visual hallucinations
    Hisayoshi Oka
    Department of Neurology, Jikei University School of Medicine, Tokyo, Japan
    Mov Disord 22:1510-4. 2007
  7. ncbi request reprint Characteristics of orthostatic hypotension in Parkinson's disease
    Hisayoshi Oka
    Department of Neurology, Jikei University School of Medicine, 3 25 8, Nishi Shinbashi, Minato ku, Tokyo, Japan
    Brain 130:2425-32. 2007
  8. doi request reprint Cardiovascular dysautonomia in de novo Parkinson's disease without orthostatic hypotension
    H Oka
    Department of Neurology, Daisan Hospital, The Jikei University School of Medicine, Izumihoncyo, Komae shi, Tokyo, Japan
    Eur J Neurol 18:286-92. 2011
  9. doi request reprint Olfactory dysfunction and cardiovascular dysautonomia in Parkinson's disease
    Hisayoshi Oka
    Department of Neurology, Daisan Hospital, The University School of Medicine, 4 11 1, Izumihoncho, Komae, Tokyo 201 8601, Japan
    J Neurol 257:969-76. 2010
  10. ncbi request reprint [Cardiac sympathetic dysfunction in Parkinson's disease--relationship between results of 123I-MIBG scintigraphy and autonomic nervous function evaluated by the Valsalva maneuver]
    Hisayoshi Oka
    Aoto Hospital, Department of Neurology, Jikei University School of Medicine
    Rinsho Shinkeigaku 43:465-9. 2003

Collaborators

Detail Information

Publications20

  1. ncbi request reprint Evaluation of baroreflex sensitivity by the sequence method using blood pressure oscillations and R-R interval changes during deep respiration
    Hisayoshi Oka
    Department of Neurology, Aoto Hospital, Jikei University School of Medicine, Tokyo, Japan
    Eur Neurol 50:230-43. 2003
    ..The phenylephrine method, Valsalva maneuver or sequence method at rest caused several problems. We evaluated the usefulness of the sequence method during deep respiration...
  2. ncbi request reprint Cardiovascular dysautonomia in de novo Parkinson's disease
    Hisayoshi Oka
    Department of Neurology, Aoto Hospital, Jikei University School of Medicine, Tokyo, Japan
    J Neurol Sci 241:59-65. 2006
    ..Clinical symptoms of Parkinson's disease (PD) include not only motor distress, but also autonomic dysfunction...
  3. ncbi request reprint Cardiovascular dysautonomia in Parkinson's disease and multiple system atrophy
    H Oka
    Department of Neurology, Aoto Hospital, Tokyo, Japan
    Acta Neurol Scand 113:221-7. 2006
    ....
  4. doi request reprint Reduced cardiac 123I-MIBG uptake reflects cardiac sympathetic dysfunction in de novo Parkinson's disease
    Hisayoshi Oka
    Department of Neurology, Daisan Hospital, The Jikei University School of Medicine, 4 11 1, Izumihoncho, Komae, Tokyo, 201 8601, Japan
    J Neural Transm (Vienna) 118:1323-7. 2011
    ..648, p = 0.0003). Cardiac (123)I-MIBG uptake began to decrease in association with the reduction in the overshoot of phase IV on the VM. Cardiac (123)I-MIBG uptake clinically reflects cardiac sympathetic dysfunction in de novo PD...
  5. ncbi request reprint Cardiovascular autonomic dysfunction in dementia with Lewy bodies and Parkinson's disease
    Hisayoshi Oka
    Department of Neurology, Jikei University School of Medicine, 3 25 8, Nishi Shinbashi, Tokyo, 105 8461, Japan
    J Neurol Sci 254:72-7. 2007
    ..We estimated the extent and pattern of cardiovascular autonomic dysfunction in dementia with Lewy bodies (DLB) as compared with that in Parkinson's disease (PD)...
  6. ncbi request reprint Impaired cardiovascular autonomic function in Parkinson's disease with visual hallucinations
    Hisayoshi Oka
    Department of Neurology, Jikei University School of Medicine, Tokyo, Japan
    Mov Disord 22:1510-4. 2007
    ..Severe dysfunction in PD with VH is probably attributed to Lewy-body lesions or neuronal loss in sympathetic ganglia, the central autonomic system, or both...
  7. ncbi request reprint Characteristics of orthostatic hypotension in Parkinson's disease
    Hisayoshi Oka
    Department of Neurology, Jikei University School of Medicine, 3 25 8, Nishi Shinbashi, Minato ku, Tokyo, Japan
    Brain 130:2425-32. 2007
    ..It was unclear whether vasomotor and cardiac sympathetic dysfunction in patients with PD was caused primarily by the impairment of preganglionic or postganglionic lesions...
  8. doi request reprint Cardiovascular dysautonomia in de novo Parkinson's disease without orthostatic hypotension
    H Oka
    Department of Neurology, Daisan Hospital, The Jikei University School of Medicine, Izumihoncyo, Komae shi, Tokyo, Japan
    Eur J Neurol 18:286-92. 2011
    ..Clinical symptoms of Parkinson's disease (PD) include not only motor distress, but also autonomic dysfunction...
  9. doi request reprint Olfactory dysfunction and cardiovascular dysautonomia in Parkinson's disease
    Hisayoshi Oka
    Department of Neurology, Daisan Hospital, The University School of Medicine, 4 11 1, Izumihoncho, Komae, Tokyo 201 8601, Japan
    J Neurol 257:969-76. 2010
    ..As non-motor symptoms of PD, olfactory dysfunction and autonomic network failure appear to be closely related in PD...
  10. ncbi request reprint [Cardiac sympathetic dysfunction in Parkinson's disease--relationship between results of 123I-MIBG scintigraphy and autonomic nervous function evaluated by the Valsalva maneuver]
    Hisayoshi Oka
    Aoto Hospital, Department of Neurology, Jikei University School of Medicine
    Rinsho Shinkeigaku 43:465-9. 2003
    ..Our findings suggest that silent cardiac autonomic dysfunction may be evaluated by 123I-MIBG scintigraphy, because early and delayed H/M ratios were lower in the patients with PD who had normal IVp than in the control subjects...
  11. ncbi request reprint Cardiac sympathetic denervation in bradykinesia-dominant Parkinson's disease
    Masahiko Suzuki
    Department of Neurology, The Jikei University School of Medicine, Tokyo, Japan
    Neuroreport 18:1867-70. 2007
    ..Our results suggest a close link between myocardial sympathetic degeneration and bradykinesia, age at onset and disease duration...
  12. ncbi request reprint Pramipexole-induced antecollis in Parkinson's disease
    Masahiko Suzuki
    Department of Neurology, The Jikei University School of Medicine, 3 25 8, Nishi Shinbashi, Minato ku, Tokyo, 105 8461, Japan
    J Neurol Sci 264:195-7. 2008
    ..Pramipexole-induced antecollis may be serious, but is a reversible dystonia in patients with PD. Clinicians should be aware of such complication...
  13. doi request reprint Clinical characteristics of supine hypertension in de novo Parkinson disease
    Tadashi Umehara
    Department of Neurology, Daisan Hospital, The Jikei University School of Medicine, 4 11 1 Izumihoncho, Komae shi, Tokyo, 201 8601, Japan
    Clin Auton Res 26:15-21. 2016
    ..However, its clinical characteristics in patients with Parkinson disease (PD) remain unclear. The present study aimed to clarify the characteristics of supine hypertension in patients with de novo PD...
  14. ncbi request reprint [Sudomotor dysfunction in Parkinson's disease]
    Masayuki Yoshioka
    Department of Neurology, Aoto Hospital, Jikei University School of Medicine
    Rinsho Shinkeigaku 43:379-84. 2003
    ..Our results suggest that sudomotor dysfunction in PD primarily affects the distal parts of the upper and lower extremities. Sudomotor dysfunction affecting distal parts of the extremities worsens with increased severity of PD...
  15. ncbi request reprint Predictors of postprandial hypotension in elderly patients with de novo Parkinson's disease
    Tadashi Umehara
    Department of Neurology, Daisan Hospital, The Jikei University School of Medicine, 4 11 1 Izumihoncho, Komae shi, Tokyo, 201 8601, Japan
    J Neural Transm (Vienna) 123:1331-1339. 2016
    ..Our results suggest that these variables predict the presence of postprandial hypotension in elderly patients with Parkinson's disease, suggesting that postprandial hypotension shares etiologic factors with these potential predictors...
  16. doi request reprint Thyroid hormone level is associated with motor symptoms in de novo Parkinson's disease
    Tadashi Umehara
    Department of Neurology, Daisan Hospital, The Jikei University School of Medicine, 4 11 1 Izumihoncho, Komae shi, Tokyo, 201 8601, Japan
    J Neurol 262:1762-8. 2015
    ..Further studies are needed to clarify whether the decreased hormone levels have functional roles in motor and non-motor symptoms. ..
  17. ncbi request reprint [Relation between autonomic dysfunction and progression of Parkinson's disease]
    H Oka
    Aoto Hospital, Department of Neurology, Jikei University School of Medicine
    Rinsho Shinkeigaku 41:283-8. 2001
    ..Baroreceptor reflex sensitivity decreased and vasomotor sympathetic autonomic dysfunction developed as duration of disease increased...
  18. doi request reprint Postprandial hypotension in de novo Parkinson's disease: a comparison with orthostatic hypotension
    Tadashi Umehara
    Department of Neurology, Daisan Hospital, The Jikei University School of Medicine, 4 11 1 Izumihoncho, Tokyo 201 8601, Japan Electronic address
    Parkinsonism Relat Disord 20:573-7. 2014
    ..Postprandial hypotension (PPH) is often associated with Parkinson's disease (PD). However, its mechanism remains to be fully defined. We investigated the mechanism of PPH and compared it with that of orthostatic hypotension (OH)...
  19. ncbi request reprint Reduced cardiac 123I-MIBG uptake reflects cardiac sympathetic dysfunction in Lewy body disease
    H Oka
    Department of Neurology, Jikei University School of Medicine, Tokyo, 105 8461, Japan
    Neurology 69:1460-5. 2007
    ..To examine the relation between the results of cardiac (123)I-meta-iodobenzylguanidine (MIBG) scintigraphy and cardiovascular autonomic function in Lewy body disease (LBD)...
  20. ncbi request reprint Over 10 years of isolated autonomic failure preceding dementia and Parkinsonism in 2 patients with Lewy body disease
    Yoshitaka Yamanaka
    Mov Disord 22:595-7. 2007