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The Experimental Study Regarded to the Mechanism of Centrally Induced Arrhythmia

Research Project

Project/Area Number 02670694
Research Category

Grant-in-Aid for General Scientific Research (C)

Allocation TypeSingle-year Grants
Research Field 麻酔学
Research InstitutionKANSAI MEDICAL UNIVERSITY

Principal Investigator

SAITO Keizo  KANSAI MEDICAL UNIVERSITY MEDICINE Research Associate, 医学部, 助手 (50148524)

Co-Investigator(Kenkyū-buntansha) IKEDA Sakahiro  KANSAI MEDICAL UNIVERSITY MEDICINE Research Associate, 医学部, 助手 (70212769)
MATSUMOTO Sanae  KANSAI MEDICAL UNIVERSITY MEDICINE Research Associate, 医学部, 助手 (20154156)
NIITSU Tateki  KANSAI MEDICAL UNIVERSITY MEDICINE Assistant Professor, 医学部, 講師 (40098140)
Project Period (FY) 1990 – 1992
Project Status Completed (Fiscal Year 1992)
Budget Amount *help
¥2,400,000 (Direct Cost: ¥2,400,000)
Fiscal Year 1992: ¥500,000 (Direct Cost: ¥500,000)
Fiscal Year 1991: ¥600,000 (Direct Cost: ¥600,000)
Fiscal Year 1990: ¥1,300,000 (Direct Cost: ¥1,300,000)
KeywordsSubarachnoid hemorrhage / Electrocardiography / Basal cistern / ProstaglandinF_2alpha / Lidocaine / Rabbits / Plasma epinephrine / Pkasma norepinephrine / 頭蓋咽頭管 / 中枢性不整脈 / 脳血流 / 脳底槽内薬液注入 / 視交叉槽 / 交叉熱電対 / クモ膜下出血 / 薬液注入
Research Abstract

We developed a new method for introducing drugs into the basal cistern of rabbits. In this model, injection of 0.5ml of 0.1% ProstaglandinF_2alpha ( PGF_2alpha )into the basal cistern produced ECG changes, which were normalized with intracisternal administration of 0.5ml of 0.1% lidocaine. In this study, to elucidate the cause of these electrocardiographic( ECG ) changes. Regional cerebral blood flow ( gammaCBF ) near the hypothalamus was measured continuously using crossed thermocouple type texture blood flow measuring system. Intracisternal injection of PGF_2alpha produced bradycardia and other ECG changes, bloodpressure rose, and the gammaCBF increased. Intracisternal injection of lidocaine immediately abolished the ECG changes however it did not show any tendency for the gammaCBF. Recently, some authors express that ischemia of the hypothalamus may produce arrhythmias. From this study we conclude that ischemic changes of the area near the basal cistern is not the only cause of the … More ECG changes. The ECG changes were considered to be normalized by lidocaine with effect on the brain cells. And the following study with reference to elucidating nerve pathways of PGF_2alpha produced stimulation, changes in ECG were examined in three groups of rabbits which underwent dissection of the spinal cord either at C_<2-3>, or at Th_<7-8>, or binding of bilateral suprarenal artery and vein, prior to the administration of PGF_2alpha into the basal cistern. The administration of PGF_2alpha decreased more significantly appearance rate of ECG alteration in the rabbits following spinal cord dissection at C_<2-3>, and binding of the suprarenal vessels than the rabbits with spinal cord dissection at Th_<7-8>. And we measured plasma epinephrine and norepinephrine concentration in a rabbit model simulating subarachnoid hemorrhage(SAH), following the injection of PGF_2alpha into the basal cistern. In this model, plasma epinephrine values increased significantly (to 4.2-fold those before injection), substantially more than norepinephrine (which increased 1.3-fold) at 5 minutes after PGF_2alpha injection. Dissection of autonomic outflow from the cervical spinal cord or ligation of the suprarenal veins reduced the changes in plasma catecholamine concentration associated with PGF_2alpha injection. These results suggest that the sympathetic discharge seen after PGF_2alpha injection into the basal cistern in rabbits occurred through the sympatho-adrenal pathways. Less

Report

(4 results)
  • 1992 Annual Research Report   Final Research Report Summary
  • 1991 Annual Research Report
  • 1990 Annual Research Report
  • Research Products

    (16 results)

All Other

All Publications (16 results)

  • [Publications] 斎藤 敬三,新津 建樹,堀内 忠樹,内田 盛夫: "薬液注入を目的とした家兎脳底槽内への新到達法(中枢性不整脈の実験方法)" 循環制御. 6. 129-133 (1985)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] 斎藤 敬三,新津 建樹,堀内 忠樹,奥田 平治,浅井 隆,内田 盛夫: "PGF_2α誘発中枢起源不整脈発生時およびリドカイン注入時の局所脳血流の変化" 循環制御. 12. 441-445 (1991)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] 福田 亮,新津 建樹,横山 弥栄,中村 久美子,内田 盛夫: "家兎脳底槽へのPGF_2α注入時の異常心電図発現の機序" 麻酔. 40. 1646-1651 (1991)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] Morio uchida, Keizo Saito, Tateki Niitsu, and Heiji Okuda: "Model of electrocardiographic changes seen with subarachnoid hemorrhage in rabbits" Stroke. 20. 112-118 (1989)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] Yae Yokoyama, Morio Uchida, Sanae Matsumoto, Keizo Saito, and Makoto Fukuda: "Changes in plasma catecholamine levels following injection of prostaglandin F_2alpha into the basal cistern in rabbits" J Anesth. 6. 161-166 (1992)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] 斎藤 敬三: "薬液注入を目的とした家兎脳底槽への新到達法(中枢性不整脈の実験方法)" 循環制御. 6. 129-133 (1985)

    • Related Report
      1992 Annual Research Report
  • [Publications] 斎藤 敬三: "PGF_2αの誘発中枢起源不整脈発生時およびリドカイン注入時の局所脳血流の変化" 循環制御. 12. 441-445 (1991)

    • Related Report
      1992 Annual Research Report
  • [Publications] Morio Uchida: "Model of Electrocardiographic Changes Seen With Subarachnoid Hemoyrhage in Rabbits." Stroke. 20. 112-118 (1989)

    • Related Report
      1992 Annual Research Report
  • [Publications] Yae Yokoyama: "Changes in Plasma Catecholamine Levels following Injection of Prostaglandin F_2α in to the Basal Cistern in Rabbits."

    • Related Report
      1992 Annual Research Report
  • [Publications] 斎藤 敬三: "薬液注入を目的とした家兎脳底槽への新到達法(中枢性不整脈の実験方法)" 循環制御. 6. 129-133 (1985)

    • Related Report
      1991 Annual Research Report
  • [Publications] 斎藤 敬三: "PGF_2α誘発中枢起源不整脈発生時およびリドカイン注入時の局所脳血流の変化" 循環制御. 12. 441-445 (1991)

    • Related Report
      1991 Annual Research Report
  • [Publications] Morio,Uchida: "Model of Electrocardiographic Changes Seen with Subarachnoid Hemorrhage in Rabbits" Stroke. 20. 112-118 (1989)

    • Related Report
      1991 Annual Research Report
  • [Publications] Yae,Yokoyama: "Changes in Plasma Cathecholamine Levels following Injection of Prostaglandin F_2α into the Basal cistern in Rabbits" Journal of Anesthesia. 6. (1992)

    • Related Report
      1991 Annual Research Report
  • [Publications] 斎藤 敬三: "薬液注入を目的とした家兎脳底槽への新到達法ー中枢性不整脈の実験方法" 循環制御. 6. 129-133 (1985)

    • Related Report
      1990 Annual Research Report
  • [Publications] Morio Uchida: "Model of Electrocardiographic Changes Seen With Subarachnoid Hemorrhage in Rabbits." Stroke. 20. 112-118 (1989)

    • Related Report
      1990 Annual Research Report
  • [Publications] 新津 建樹: "家兎脳底槽内への薬剤注入による心電図の変化" 関西医科大学雑誌. 37. 195-213 (1985)

    • Related Report
      1990 Annual Research Report

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Published: 1990-04-01   Modified: 2016-04-21  

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