| Project/Area Number |
09670704
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Circulatory organs internal medicine
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| Research Institution | Tokyo Medical and Dental University |
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Principal Investigator |
HIRAI Kenzo Tokyo Medical and Dental University School of Medicine Assistant Professor, 医学部, 助手 (30208805)
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| Project Period (FY) |
1997 – 1998
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| Project Status |
Completed (Fiscal Year 1998)
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| Budget Amount *help |
¥3,100,000 (Direct Cost: ¥3,100,000)
Fiscal Year 1998: ¥1,000,000 (Direct Cost: ¥1,000,000)
Fiscal Year 1997: ¥2,100,000 (Direct Cost: ¥2,100,000)
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| Keywords | endoscope / heart / Nd : YAG laser / catheter ablation / Nd:YAGレーザー / 冠状静脈洞 / トダロ索 / 卵円窩 |
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| Research Abstract |
1. Experimantal Studies on Puncture under Direct Vision of the interatriai Septum Using a Balloon-tipped Cardioscope : To reduce the demerits of Brockenbrough method under fluoroscopy, we studied on the new Brockenbrough method under direct vision using a cardioscope. it was difficult to perform this new method using a cardioscope. Although the structures including the fossa ovalis in the septum were visually identified clearly, sticking the fossa ovalis by a needle was not possible because the needle dislodged from the target site just before stick.
2. Experimental Studies on Nd : YAG Laser Photocoagulation of the Left Atrial Wall Using a Cardioscope : Instead of transseptal approach into the left atrium, the endoscope was inserted into the left atrium through a purse-string suture after left-sided thoracotomy. By transballoon-irradiation of Nd : YAG laser to the left atrial wall, the linear photoablation was achieved from the opening of the pulmonary vein to the mitral annulus. Analysis of data is in preparation.
3. Guldance for Catheter Placement into the Coronary Sinus under Direct Vision Using a Cardiscope : We demonstrated that non-fluoroscopic guidance for catheter placement into the coronary sinus ostium was achievable under direct vision using a ballooned-tipped cardioscope. This was published in P.A.C.E.in 1998.
4. Experimental Studies on Nd : YAG Laser Photocoagulation Using a Cardioscope : We studied the effects of transballoon Nd : YAG laser irradition to two different sites in the right atrial septum on the electrophysiologic properties of AV conduction. Irradiation to the midseptum from the CS roof to the tricuspid annulus produced complete AV block, while the posterior septal irradiation between the CS floor and the tricuspid annulus induced block of slow pathway conduction. This article was presented in N.A.S.P.E.in 1998.
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