JP5307401B2 - 心室ペーシング - Google Patents
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Classifications
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
- A61N1/00—Electrotherapy; Circuits therefor
- A61N1/18—Applying electric currents by contact electrodes
- A61N1/32—Applying electric currents by contact electrodes alternating or intermittent currents
- A61N1/36—Applying electric currents by contact electrodes alternating or intermittent currents for stimulation
- A61N1/362—Heart stimulators
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
- A61N1/00—Electrotherapy; Circuits therefor
- A61N1/18—Applying electric currents by contact electrodes
- A61N1/32—Applying electric currents by contact electrodes alternating or intermittent currents
- A61N1/36—Applying electric currents by contact electrodes alternating or intermittent currents for stimulation
- A61N1/362—Heart stimulators
- A61N1/3627—Heart stimulators for treating a mechanical deficiency of the heart, e.g. congestive heart failure or cardiomyopathy
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
- A61N1/00—Electrotherapy; Circuits therefor
- A61N1/18—Applying electric currents by contact electrodes
- A61N1/32—Applying electric currents by contact electrodes alternating or intermittent currents
- A61N1/36—Applying electric currents by contact electrodes alternating or intermittent currents for stimulation
- A61N1/362—Heart stimulators
- A61N1/37—Monitoring; Protecting
- A61N1/371—Capture, i.e. successful stimulation
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- Health & Medical Sciences (AREA)
- Cardiology (AREA)
- Heart & Thoracic Surgery (AREA)
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- General Health & Medical Sciences (AREA)
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Description
本出願は、米国を除く全ての国を指定する出願人である米国国内企業アクション・メディカル社(ActionMedical,Inc.)、米国のみを指定する出願人である、ともにアルゼンチン共和国国籍のダニエル・フェリペ・オルテガ(Daniel Felipe Ortega)、アルベルト・ジャーマン・ジニゲル(Alberto German Giniger)、米国国籍のチンシェン・ジュー(Qingsheng Zhu)およびJ.エドワード・シャプランド(J.Edward Shapland)の名において、2005年12月13日にPCT国際特許出願として出願され、アルゼンチン共和国出願番号第P040104782号(2004年12月20日出願)に対し優先権を主張する。
経皮的に植え込まれるペーシング電極は、通常、心臓右側の心室(右心房または右心室)にのみ配置される。右側心室へのアクセスは容易である。アクセスは上大静脈腔を通じて右心房へ、次いで右心室内へとなされる。
1990年代から、鬱血性心不全(CHF)の治療に心臓ペーシングを行うようになった。CHF患者は左心室からの出力が弱い。
本発明は、隔壁と自由壁の同時収縮を行うため隔壁および左心室自由壁の筋肉組織を刺激するパルス電場を右心室内に形成することに関する。
図1および図8は、両方の電極が右心室に設置され、遠位電極が右心室の頂部に固定された、市販のリードおよび関連する電場を示す。説明を簡単にするため、図8では心室RV、LVのみを示している。また、説明を簡単にするため、図8では電極E1、E2のみを図示し、リード本体LB1の残りは示していない。
図9は、電極E1、E2を右心室RV(図1および図8参照)の内部から移動させ、隔壁に直接配置することに伴う利点を示す。電極E1、E2を移動させることで、電場線が隔壁Sの方向および左心室LVの自由壁FWの方向へシフトされる。ただし、このような改良を施しても、隔壁および左心室自由壁への有効な刺激に要する電圧は高すぎて実際的でないと考えられる。
図14は、隔壁Sに対向して電極E1、E2の側に配置された誘電材料DMによってどのように電場が歪曲されうるかを示している。誘電材料DMにより電場の歪曲が生じ、左の電場線LFLが隔壁Sおよび自由壁FWに向けてバイアスされる。当然ながら、この構成は基準電極が設けられる場合により好ましく作用し、有用性を高める。
Claims (11)
- 患者の心臓の状態を治療するための装置であって、前記装置は、
前記心臓の右心室内の選択された位置に固定配置されるように構成され、前記選択された位置に心筋刺激ペーシング信号を導入しかつ伝導するための基準電圧成分に電気的に関連された第一の電極および第二の電極を有しており、前記ペーシング信号は、前記基準電圧成分に関して逆の極性を有しかつ電位を有する第一および第二の信号成分の形態をなしている前記装置において、
前記ペーシング信号は心筋を捕捉するのに十分であり、
前記第二の電極は、右心室において三尖弁に対して十分に近接しており、前記第一の電極及び第二の電極は、右心室において隔壁に接しており、前記ペーシング信号を提供するときに、残存する伝導ファイバとプルキンエ繊維とを活性化し、左脚ブロックのない患者に存在する正常な活性化と同様のパターンに従う、左心室のより迅速かつ一定な活性化を生じさせるようにしたことを特徴とする、患者の心臓の状態を治療するための装置。 - 前記ペーシング信号が、無線伝導によって制御されることを特徴とする、請求項1に記載の装置。
- 多数の基準電極であって、前記多数の基準電極のうち前記基準電圧成分に接続される特定の1つを選択するためのスイッチを備えた前記多数の基準電極をさらに含む、請求項1に記載の装置。
- 心房に配置され、かつ心房と心室の連続したペーシングを促進するペーシング/センシング回路により通電されるのに適した少なくとも1つの電極を備えたリードをさらに含む請求項1に記載の装置。
- 前記左心室に配置され、かつペーシングまたはセンシング回路により制御される電極を備えたリードをさらに含む請求項1に記載の装置。
- 除細動療法のための、少なくとも1つの大きなショック電極と、除細動療法のための除細動電極系を通電するための回路とをさらに備えた除細動リードシステムを含む請求項1に記載の装置。
- 前記第一の電極および第二の電極は、前記右心室内に配置されるのに適した複数の電極の一部であり、信号発生器は前記複数の電極のうち1つの電極を前記第一の成分に、前記複数の電極のうち第二の電極を第二の成分に選択的に接続するための回路を含む請求項1に記載の装置。
- 異なるペーシング・モード間の選択をする回路をさらに含む請求項1に記載の装置。
- 前記第一の電極と第二の電極の間の電場を、左心室の同期収縮をより可能とする部位に向けてバイアスすべく前記基準電圧成分を配置するために基準電圧が用いられ、前記ペーシング信号が心室捕捉を生成するように選択されることを特徴とする、請求項1に記載の装置。
- 前記第一の電極と前記第二の電極が、同じリード上に配置されることをさらに特徴とする請求項1に記載の装置。
- 前記ペーシング信号が約0.1ミリ秒と約2ミリ秒との間の存続期間と、前記第一の信号と前記第二の信号との間で約0.1ボルトと約20ボルトの間の電圧差を有していることをさらに特徴とする、請求項1に記載の装置。
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ARP20040104782 | 2004-12-20 | ||
ARP040104782A AR047851A1 (es) | 2004-12-20 | 2004-12-20 | Un nuevo marcapasos que restablece o preserva la conduccion electrica fisiologica del corazon y un metodo de aplicacion |
ARP040104782 | 2004-12-20 | ||
PCT/US2005/045044 WO2006068880A1 (en) | 2004-12-20 | 2005-12-13 | Ventricular pacing |
Related Child Applications (1)
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JP2013019149A Division JP5744079B2 (ja) | 2004-12-20 | 2013-02-04 | 心室ペーシング |
Publications (3)
Publication Number | Publication Date |
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JP2008523950A JP2008523950A (ja) | 2008-07-10 |
JP2008523950A5 JP2008523950A5 (ja) | 2011-12-15 |
JP5307401B2 true JP5307401B2 (ja) | 2013-10-02 |
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JP2007548289A Expired - Fee Related JP5307401B2 (ja) | 2004-12-20 | 2005-12-13 | 心室ペーシング |
JP2013019149A Expired - Fee Related JP5744079B2 (ja) | 2004-12-20 | 2013-02-04 | 心室ペーシング |
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JP2013019149A Expired - Fee Related JP5744079B2 (ja) | 2004-12-20 | 2013-02-04 | 心室ペーシング |
Country Status (7)
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US (7) | US8346358B2 (ja) |
EP (1) | EP1830920B1 (ja) |
JP (2) | JP5307401B2 (ja) |
AR (1) | AR047851A1 (ja) |
AU (1) | AU2005319498B2 (ja) |
CA (1) | CA2591121A1 (ja) |
WO (1) | WO2006068880A1 (ja) |
Families Citing this family (80)
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US20040147994A1 (en) * | 2003-01-28 | 2004-07-29 | Cardiac Pacemakers, Inc. | Tachy lead system optimized for septal placement |
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US20130261690A1 (en) | 2013-10-03 |
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US8812106B2 (en) | 2014-08-19 |
US8838238B2 (en) | 2014-09-16 |
WO2006068880A1 (en) | 2006-06-29 |
JP2013121524A (ja) | 2013-06-20 |
AR047851A1 (es) | 2006-03-01 |
US20090187226A1 (en) | 2009-07-23 |
EP1830920B1 (en) | 2013-10-09 |
JP5744079B2 (ja) | 2015-07-01 |
US8346358B2 (en) | 2013-01-01 |
AU2005319498B2 (en) | 2011-04-07 |
JP2008523950A (ja) | 2008-07-10 |
AU2005319498A1 (en) | 2006-06-29 |
US20130096638A1 (en) | 2013-04-18 |
US20060142812A1 (en) | 2006-06-29 |
US20060136001A1 (en) | 2006-06-22 |
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