アクティベーションとエントレインメントのマッピングでは,典型的な心房の前面の障壁として三円を定義しています
J M Kalman1, J E Olgin, L A Saxon
1Department of Medicine, University of California, San Francisco 94143-1354, USA.
Circulation
|August 1, 1996
まとめ
トリコスピッド・アヌルスは,典型的な心房の回路において,連続した前面の障壁として作用する. この発見は,ヒト患者のエントレインメントマッピングに基づくもので,心房の再侵入の解剖学を明確にします.
科学分野:
- 心臓病学 心臓病学
- 電気生理学 電気生理学
- 心臓の解剖学 心臓の解剖学
背景:
- アナトミックな障壁は,心房の再入場回路にとって極めて重要です.
- クリスト・ターミナリスとユースタキウス脊は後部障壁を形成する.
- 前面の障壁としてのトライカスピドアヌルスの役割が仮定された.
研究 の 目的:
- 三円が,心房の振動回路に連続した前面の障壁を形成するという仮説を検証するために.
- 人間の心房振動における三円の役割を調査する.
主な方法:
- 典型的な心房を患った13人の患者を研究した.
- ハロとマッピング・キャセターを用いて,トリキュスピッド・アヌルスとその他の心房部位の周りのアクティベーションとエントレインメント・マッピングを行った.
- 誘導基準を用いて回路内の定義された場所 (後進間隔 - フラッターサイクルの長さ ≤10 ms).
主要な成果:
- トリコスピッド・アヌルスの周りにマッピングされた7つのサイトは,すべてフラッター回路内にありました.
- アクティベーションはアヌルスの周りに順次発生し,フラッターサイクル全体の長さを占めました.
- 卵巣穴,冠動脈副鼻腔,右心房付属体は回路の外でした.
結論:
- トリコスピッドアヌルスの周りの連続的な活性化は,フラッター回路におけるその役割を確認する.
- トリコスピッド・アヌルスは,ヒトの逆時計方向の心房振動に対して,連続した前面の障壁として作用する.
- エントレーニングマッピングの基準は,三円の障壁機能を検証した.
関連する概念動画
Ionic Radii
Ionic radius is the measure used to describe the size of an ion. A cation always has fewer electrons and the same number of protons as the parent atom; it is smaller than the atom from which it is derived. For example, the covalent radius of an aluminum atom (1s22s22p63s23p1) is 118 pm, whereas the ionic radius of an Al3+ (1s22s22p6) is 68 pm. As electrons are removed from the outer valence shell, the remaining core electrons occupying smaller shells experience a greater effective nuclear...
The Auditory Ossicles
The auditory ossicles of the middle ear transmit sounds from the air as vibrations to the fluid-filled cochlea. The auditory ossicles consist of two malleus (hammer) bones, two incus (anvil) bones, and two stapes (stirrups), one on each side. These bones develop during the fetal stage and are the ones to ossify first. They are fully mature at birth and do not grow afterward.
The aptly named stapes look very much like a stirrup. The three ossicles are unique to mammals, and each plays a role in...
The aptly named stapes look very much like a stirrup. The three ossicles are unique to mammals, and each plays a role in...
Accessory Structures of the Eye
Optical perception, or vision, is an extraordinary sense dependent on converting light signals received via the ocular organs. These organs, known as eyes, are securely positioned within the bony cavities of the skull, called orbits. The orbits serve a dual purpose: a protective shield for the ocular globes and a stable attachment point for the soft ocular tissues. The eye's external protective mechanisms include the eyelids, which are edged with lashes that act as a barrier against foreign...
Anatomy of the Eyeball
The eye is a spherical, hollow structure composed of three tissue layers. The outer layer — the fibrous tunic, comprises the sclera — a white structure — and the cornea, which is transparent. The sclera encompasses some of the ocular surface, most of which is not visible. However, the 'white of the eye' is distinctively visible in humans compared to other species. The cornea, a clear covering at the front of the eye, enables light penetration. The eye's middle layer, the vascular tunic,...
Anatomy of the Ear
Auditory sensation, commonly called hearing, involves the transformation of sonic waves into neural impulses facilitated by the structures of the auditory organ. The prominent, flesh-like structure on the side of the head, called the auricle, directs sound waves towards the auditory canal. The auricle is often mislabeled as the pinna, a term more aligned with mobile structures like a feline's external ear. The auditory canal penetrates the cranium via the external auditory meatus of the...
Azimuths and Bearings
Azimuths and bearings are essential concepts in surveying, providing methods to express the direction of a line relative to a meridian. Azimuths refer to the clockwise angle measured from the north end of a reference meridian to the given line, ranging from zero to 360 degrees. This method gives a comprehensive directional reference within a full 360-degree circle, making it a straightforward way to communicate direction in various fields, including navigation, cartography, and...


