Jove
Visualize
お問い合わせ
JoVE
x logofacebook logolinkedin logoyoutube logo
JoVEについて
概要リーダーシップブログJoVEヘルプセンター
著者向け
出版プロセス編集委員会範囲と方針査読よくある質問投稿
図書館員向け
推薦の声購読アクセスリソース図書館諮問委員会よくある質問
研究
JoVE JournalMethods CollectionsJoVE Encyclopedia of Experimentsアーカイブ
教育
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab Manual教員リソースセンター教員サイト
利用規約
プライバシーポリシー
ポリシー

関連する概念動画

Position Vectors01:29

Position Vectors

1.9K
A position vector is a fundamental concept in mathematics that helps determine the position of one point with respect to another point in space. It is a vector that describes the direction and distance between two points. Position vectors are highly useful in the field of math and science, as they help represent spatial relationships and make calculations easier.
For instance, we want to locate a point P(x, y, z) relative to the origin of coordinates O. In that case, we can define a position...
1.9K
Position and Displacement Vectors01:00

Position and Displacement Vectors

12.9K
To describe the motion of an object, one should first be able to describe its position (where it is at any particular time). More precisely, the position needs to be specified relative to a convenient frame of reference. A frame of reference is an arbitrary set of axes from which the position and motion of an object are described. Earth is often used as a frame of reference to describe the position of an object in relation to stationary objects on Earth.
Further, several important kinds of...
12.9K
Standard Electrode Potentials03:02

Standard Electrode Potentials

50.3K
On comparing the reactivity of silver and lead, it is observed that the two ionic species, Ag+ (aq) and Pb2+ (aq), show a difference in their redox reactivity towards copper: the silver ion undergoes spontaneous reduction, while the lead ion does not. This relative redox activity can be easily quantified in electrochemical cells by a property called cell potential. This property is commonly known as cell voltage in electrochemistry, and it is a measure of the energy which accompanies the charge...
50.3K
Position-effect Variegation02:32

Position-effect Variegation

7.1K
In 1928, a German botanist Emil Heitz observed the moss nuclei with a DNA binding dye. He observed that while some chromatin regions decondense and spread out in the interphase nucleus, others do not. He termed them euchromatin and heterochromatin, respectively. He proposed that the heterochromatin regions reflect a functionally inactive state of the genome. It was later confirmed that heterochromatin is transcriptionally repressed, and euchromatin is transcriptionally active chromatin.
7.1K
Vectors01:30

Vectors

480
Vectors are mathematical entities characterized by both magnitude and direction. Unlike scalars, which are defined solely by magnitude, vectors represent quantities like displacement, velocity, and force, where direction is essential. Vectors are graphically represented as directed line segments, extending from an initial point to a terminal point, denoted with bold letters or arrows placed above the symbol. Two vectors are deemed equal if they share identical magnitudes and directions,...
480
Serial Position Effect01:03

Serial Position Effect

543
The serial position effect is a cognitive phenomenon where individuals are more likely to recall the first and last items in a list compared to those in the middle. This effect is divided into the primacy effect and the recency effect. The primacy effect is observed when the initial items in a list are remembered better. This occurs because these items are rehearsed more frequently or receive more elaborative processing, allowing them to be encoded into long-term memory more effectively. For...
543

こちらも読む

関連記事

共著者、ジャーナル、引用グラフによってこの研究に関連する記事。

並び替え
Same author

Side-viewing probe for lesion depth mapping on the left ventricle epicardium with near-infrared spectroscopy.

Scientific reports·2026
Same author

2026 HRS/AHA/APHRS/EHRA/IDSA/LAHRS/PACES/STS expert consensus statement update on cardiovascular implantable electronic device lead management and extraction.

Heart rhythm·2026
Same author

Three-dimensional visualization of arrhythmogenic substrate in mouse hearts using panoramic optical mapping and micro-computed tomography.

Nature cardiovascular research·2026
Same author

Double potential gradient analysis for critical isthmus detection in scar-related atrial tachycardia.

Heart rhythm·2026
Same author

Automated Detection of Macro-Reentrant Atrial Tachycardia Circuits Using LAT-Derived Graph Networks.

medRxiv : the preprint server for health sciences·2026
Same author

Multicenter analysis of device-detected atrial fibrillation burden reduction after antiarrhythmic drug initiation.

Heart rhythm O2·2026
Same journal

An AV-Synchronous Leadless Pacemaker with Electrical Far-Field Atrial Sensing in a Sheep Model.

Heart rhythm·2026
Same journal

Conduction system pacing in TAVR patients requiring permanent pacemaker implantation.

Heart rhythm·2026
Same journal

Trends in stroke risk among female and male patients with atrial fibrillation: a 20-year population-based cohort study.

Heart rhythm·2026
Same journal

Obstructive apneas immediately impact atrial hemodynamics and arrhythmias.

Heart rhythm·2026
Same journal

Off-Target Inhibition of PKA RII by Crizotinib Leads to Reduced hERG Expression and Acquired QT Prolongation.

Heart rhythm·2026
Same journal

Identification, multi-modal characterisation and clinical outcomes of pre-atrial fibrillation sub-classes.

Heart rhythm·2026
関連記事をすべて見る

関連する実験動画

Updated: Feb 2, 2026

Brain Mapping Using a Graphene Electrode Array
10:32

Brain Mapping Using a Graphene Electrode Array

Published on: October 20, 2023

2.4K

VERSA：任意配置電極からのオムニポーラベクトルマッピング

Jonah A Majumder1, Sarah M Schwartz2, Marcus Talke2

  • 1Department of Biomedical Engineering, Fu Foundation School of Engineering and Applied Science, Columbia University, New York, New York, USA.

Heart rhythm
|January 31, 2026
PubMed
まとめ
この要約は機械生成です。

本研究では、不整脈マッピングのためのオムニポーラ技術（OT）を導入し、局所活動時間（LAT）に依存しない、より鮮明な波形伝播の視覚化を提供します。新しいVERSAマップは、リエントリー性頻脈の理解を深め、より良いアブレーション戦略を可能にします。

キーワード:
3D視覚化活動方向心房頻脈伝導速度マルチ電極カテーテルオムニポーラ技術ベクトルマッピング

さらに関連する動画

Probing and Mapping Electrode Surfaces in Solid Oxide Fuel Cells
15:08

Probing and Mapping Electrode Surfaces in Solid Oxide Fuel Cells

Published on: September 20, 2012

16.5K
Electrode Positioning and Montage in Transcranial Direct Current Stimulation
12:00

Electrode Positioning and Montage in Transcranial Direct Current Stimulation

Published on: May 23, 2011

265.5K

関連する実験動画

Last Updated: Feb 2, 2026

Brain Mapping Using a Graphene Electrode Array
10:32

Brain Mapping Using a Graphene Electrode Array

Published on: October 20, 2023

2.4K
Probing and Mapping Electrode Surfaces in Solid Oxide Fuel Cells
15:08

Probing and Mapping Electrode Surfaces in Solid Oxide Fuel Cells

Published on: September 20, 2012

16.5K
Electrode Positioning and Montage in Transcranial Direct Current Stimulation
12:00

Electrode Positioning and Montage in Transcranial Direct Current Stimulation

Published on: May 23, 2011

265.5K

科学分野:

  • 電気生理学
  • 医療機器技術
  • 計算心臓学

背景:

  • 正確な不整脈伝播の評価は、アブレーションターゲットの特定に不可欠です。
  • 局所活動時間（LAT）を使用した現在の方法は、ばらつき、カテーテル配向、サンプリング密度によって制限されます。

研究 の 目的:

  • 多様な電極配置を持つカテーテルにLAT非依存性オムニポーラ技術（OT）を拡張する。
  • オムニポーラ推定値とLAT由来の指標を比較する。
  • ロバストな波形伝播視覚化のための重み付きリサンプリングアルゴリズムを開発する。

主な方法:

  • 心臓電気解剖マッピングデータから伝導速度（CV）、活動方向（AD）、電圧のオムニポーラ推定値を計算した。
  • オムニポーラ推定値と従来のLATベースの類似体を比較した。
  • 視覚化のためのベクトル推定、リサンプリング、平滑化アルゴリズム（VERSA）を開発し、評価した。

主要な成果:

  • オムニポーラCV推定値はLATベースのCVよりも高く、ADの差は無視できる程度でした。
  • オムニポーラ電圧はバイポーラ電圧よりも有意に高かった。
  • VERSAマップは、従来のマップと一致して、波形伝播、伝導ブロック、リエントリーパターンを直感的に視覚化しました。

結論:

  • 任意の電極配置に拡張されたオムニポーラ技術は、LATなしでリエントリー性頻脈における波形伝播を解明します。
  • VERSAマップは、複雑な不整脈の解釈を助ける明確な視覚化を提供します。
  • これらの進歩は、より効果的なアブレーション戦略を促進することができます。