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排序方式: 共有52条查询结果,搜索用时 46 毫秒
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Abstract Daan's two process model is known to be one of the most powerful models, covering various situations from free-running to sleep deprivation. In this study, bifurcation properties of the model dynamics as function of a gap, D , between the threshold processes are clarified using a circle map. As a function of D , we will show that the model has the different types of the mutual entrainment regions that are intervened by the tangent bifurcation. The variable behavior of human circadian rhythm is suggested to be systematically understood based on the bifurcation properties of the two process model. 相似文献
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YUKIHIKO KAWASAKI MITSUAKI HOSOYA SEIJI YASUMURA TETSUYA OHIRA HIROAKI SATOH HITOSHI SUZUKI AKIRA SAKAI AKIRA OHTSURU ATSUSHI TAKAHASHI KOTARO OZASA GEN KOBASHI KENJI KAMIYA SHUNICHI YAMASHITA MASAFUMI ABE THE FUKUSHIMA HEALTH MANAGEMENT SURVEY GROUP 《Fukushima journal of medical science》2015,61(2):101-110
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SHINSUKE MIYAZAKI M.D. TAISHI KUWAHARA M.D. ATSUSHI KOBORI M.D. YOSHIHIDE TAKAHASHI M.D. ASUMI TAKEI M.D. AKIRA SATO M.D. MITSUAKI ISOBE M.D. ATSUSHI TAKAHASHI M.D. 《Journal of cardiovascular electrophysiology》2010,21(11):1193-1198
AF Ablation in Patients With Valvular Heart Disease . Background: The purpose of this study is to evaluate the efficacy of atrial fibrillation (AF) ablation in patients with moderate valvular heart disease (VHD). Methods: In total, 534 consecutive patients who underwent AF ablation were enrolled. Patients with a history of valve surgery or other structural heart disease were excluded. Patients with clinically moderate VHD (group‐1, n = 45) were compared with those without VHD (control group‐2, n = 436). Ipsilateral pulmonary vein antrum isolation (PVAI) was performed with a double Lasso technique in all the patients. Left atrial (LA) linear ablation was undertaken in persistent AF patients, if AF was inducible after PVAI. Results: Patients in group‐1 were significantly older and had a larger LA. PVAI was successfully achieved in all the patients. Patients in group‐1 received LA linear ablation more frequently during the index procedure. After a median of 26 months from the index procedure, the freedom from AF was significantly lower in group‐1 than group‐2 off antiarrhythmic drugs (AADs) (47% vs 69%, P = 0.002). Although there were more number of total procedures in group‐1 than group‐2, the freedom from AF was lower at median 24 months after the last procedure (78% vs 87%, P = 0.038). There was no significant difference in the freedom from AF on AADs (91% vs 95%, P = 0.356) or complication rate between the 2 groups. Atrial tachycardia following the index procedure was observed more frequently in group‐1 (P = 0.001). Conclusion: The patients with VHD undergoing AF ablation are less likely to remain in sinus rhythm at long term without AADs than those without VHD. (J Cardiovasc Electrophysiol, Vol. 21, pp. 1193‐1198, November 2010) 相似文献
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AKIHIKO SAITOH TATSUO OHYA SHIGEHIKO YOSHIDA RYOHTA HOSOYA KOZO NISHIMURA 《Pediatrics international》1995,37(1):113-115
We encountered an 8 year old boy who suffered from Stevens-Johnson syndrome with Mycoplasma pneumoniae infection. He had multiple erythema with vesicles in oral mucosa, and on his palms and feet, trunk and genital regions. We treated him with prednisolone (1 mg/kg per day) and antibiotics. His skin lesions improved dramatically, and a persistent fever and toxic general condition also showed dramatic improvement. Although the use of corticosteroids for Stevens-Johnson syndrome has recently been controversial, we thought that administration of corticosteroids was an effective treatment for some selective cases of Stevens-Johnson syndrome. The patient reported in this study had many beneficial effects in response to corticosteroid treatment. 相似文献
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TSUYOSHI MORIMOTO RYOHTA HOSOYA HIROSHI MATSUFUJI MASAHIRO TACHI JOHTARO YOKOYAMA KOZO NISHIMURA 《Pediatrics international》1993,35(4):352-353
Two girls with acute lymphocytic leukemia (ALL) are reported. There were difficulties in removing their central venous catheters inserted from a peripheral vein. One girl required surgery under general anesthesia for the removal. The other patient received continuous infusion of low dose urokinase from a distal peripheral vein. The residual catheter was then removed successfully. 相似文献
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OSAMU KINOSHITA MINORU HONGO YUKO SAIKAWA TSUTOMU KATSUYAMA MASAO TANAKA MASASHI TAKEDA HIROAKI YAMAMOTO MITSUAKI ISOBE MORIE SEKIGUCHI 《Pacing and clinical electrophysiology : PACE》1997,20(12):2949-2953
The purpose of this study was to evaluate heart rate variability (HRV) in patients with familial amyloid polyneuropathy (FAP) using the time- and frequency-domain analysis. The study population consisted of 19 patients with FAP, and 19 age and sex matched normal volunteers. The 24-hour Holter recordings of all subjects in sinus rhythm and off medication were analyzed. Five time-domain indices of HRV were computed. The frequency component of HRV was calculated by fast Fourier transform analysis of the RR intervals. The power spectrum of the low frequency (LF) between 0.04–0.15 Hz and high frequency (HF) between 0.15–0.40 Hz and the LF/HF ratio was calculated. Global measures of HRV including the standard deviation of the mean of RR intervals (SDNN) and the standard deviation of 5-minute mean RR intervals (SDANN) were decreased in patients with FAP. Specific vagal influences on HRV including the proportion of RR intervals more than 50 milliseconds different (pNN50) and the HF power on spectral analysis were less in patients with FAP. LF power and LF/HF ratio were more decreased in patients with FAP at the advanced stage than at the early stage. In conclusion, HRV was significantly decreased in patients with FAP at the early stage, and sympathetic activity was more decreased in patients at the advanced stage. These findings suggest that the decrease of the HRV is an indicator of this disease and the power spectral analysis of the HRV is beneficial in assessing the severity of the autonomic dysfunction. 相似文献
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Impact of Non‐Pulmonary Vein Foci on the Outcome of the Second Session of Catheter Ablation for Paroxysmal Atrial Fibrillation
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MASATERU TAKIGAWA M.D. ATSUSHI TAKAHASHI M.D. TAISHI KUWAHARA M.D. KENJI OKUBO M.D. YOSHIHIDE TAKAHASHI M.D. EMIKO NAKASHIMA M.D. YUJI WATARI M.D. KAZUYA YAMAO M.D. JUN NAKAJIMA M.D. KATSUMASA TAKAGI M.D. SHIGEKI KIMURA M.D. HIROYUKI HIKITA M.D. KENZO HIRAO M.D. MITSUAKI ISOBE M.D. 《Journal of cardiovascular electrophysiology》2015,26(7):739-746
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