心房間断脈動の値を下げるには,心房間隔膜間電極を用いる
X Zheng1, M E Benser, G P Walcott
1Division of Cardiovascular Diseases, Department of Medicine, University of Alabama at Birmingham, USA.
Circulation
|November 22, 2000
まとめ
心房隔膜に電極を加えることで,心房内膜機能障害の心房不振値 (ADFT) が著しく低下します. この改善された構成は,標準的な方法と比較して,効率的な心房動脈抑制のために,より少ないエネルギーを必要とします.
科学分野:
- 電気生理学 電気生理学
- 心血管科学の研究について
- 医療機器技術 医療機器技術について
背景:
- 標準的な内側心房除細動は,右心房付属体 (RAA) と冠動脈副鼻腔 (CS) に置かれた電極を使用します.
- 動脈縮の値 (ADFT) は,成功する動脈縮に必要な最低限のエネルギーを表します.
研究 の 目的:
- 心房隔膜 (SP) に付加された電極が,標準的なRAA-->CS構成のADFTを下げることができるかどうかを調査する.
- 内部心房発動阻害のための新しいリード構成を評価する.
主な方法:
- 8頭の羊は誘発性心房細動を患った.
- デフィブリレーション電極は,RAA,CS,肺動脈 (PA),右下心房 (LRA) に配置され,SP全体に配置されました.
- 多重反転プロトコルを使用して,二相波形を持つ様々なリード構成のための心房除細動値 (ADFTs) が決定されました.
主要な成果:
- RAA-->CSコンフィギュレーションのADFTは1.27+/-0.67Jでした.
- RAA+CS-->SPコンフィギュレーションでは,ADFTが0.86+/-0.59 Jの減少を示しました.
- 連続的なショック構成,特にRAA-->SP/CS-->SPは,著しく低いADFTs (0.39+/-0.18 J) を実証しました.
結論:
- 心房隔膜にある追加の電極は,標準的なRAA-->CS構成のADFTを著しく減少させます.
- 心房隔膜を組み込む新しいリード構成は,改善された除細動の有効性を提供します.
関連する概念動画
Disturbances in Heart Rhythm
Arrhythmia or dysrhythmia refers to an abnormal heart rhythm caused by a defect in the heart's conduction system. It can cause the heart to beat irregularly, too quickly, or too slowly, leading to symptoms like chest pain, shortness of breath, and fainting. Factors such as stress, caffeine, alcohol, nicotine, cocaine, certain drugs, congenital defects, diseases, and electrolyte abnormalities can trigger arrhythmias.
Arrhythmias are categorized by their speed, rhythm, and origin. A slow heart...
Arrhythmias are categorized by their speed, rhythm, and origin. A slow heart...
Dysrhythmias VI: Management of Dysrhythmias
Dysrhythmia management involves a multifaceted approach, incorporating pharmacological treatments, medical procedures, surgical interventions, lifestyle modifications, and patient education.Pharmacological ManagementAntiarrhythmic Drugs:Class I (Sodium Channel Blockers): This class includes quinidine and procainamide, which reduce the speed of impulse conduction in the heart, stabilize the cardiac membrane, and control arrhythmias. Quinidine and procainamide are Class IA agents that prolong the...
Cardiopulmonary Resuscitation III: AED Use
Introduction to AEDAn Automated External Defibrillator (AED) is a portable medical device that analyzes the heart's rhythm and, if necessary, delivers an electrical shock to help the heart re-establish an effective rhythm during sudden cardiac arrest (SCA). SCA occurs when the heart suddenly and unexpectedly stops beating, leading to a loss of blood flow to the brain and other vital organs. In such emergencies, time is of the essence, and using an AED, combined with Cardiopulmonary...
Cardiomyopathy II: Dilated Cardiomyopathy
Dilated cardiomyopathy, or DCM, is a progressive myocardial disorder characterized by ventricular chamber dilation and contractile dysfunction.EtiologyVarious factors can cause DCM, including hypertension and heavy alcohol intake, which contribute to the weakening and enlargement of the heart muscle. Viral infections, such as Coxsackievirus B, adenoviruses, and influenza, can lead to DCM by causing inflammation and damage to heart tissue. Certain chemotherapeutic agents, including daunorubicin,...
Cardiomyopathy V: Interprofessional Care
Managing cardiomyopathy involves addressing underlying or precipitating causes, treating heart failure with medications, and implementing dietary changes and a balanced exercise and rest regimen.Lifestyle ModificationsCardiomyopathy patients should adopt a low-sodium diet to reduce fluid retention and manage heart failure. A personalized exercise and rest plan helps maintain physical fitness without overstraining the heart. Avoiding alcohol and tobacco is essential to prevent further damage to...
ECG Interpretation of Arrhythmias II: Atrial, Junctional and Ventricular Arrhythmias
Arrhythmia is a condition characterized by an irregular heart rhythm, with ECG changes that differ based on its origin and nature. The types of arrhythmias discussed below include atrial, junctional, and ventricular arrhythmias.Atrial ArrhythmiasPremature Atrial Complexes (PACs): PACs are early atrial beats caused by stress, caffeine, alcohol, electrolyte imbalances, hypoxia, hyperthyroidism, or certain medications (e.g., bronchodilators and decongestants). The ECG shows early P waves with an...


