関連する実験動画
Updated: May 6, 2026
12:03
Myocardial Infarction and Functional Outcome Assessment in Pigs
Published on: April 25, 2014
31.4K
脳死ブタにおける心筋機能不全と関連した機能性心筋不全の証拠
C Seguin1, Y Devaux, S Grosjean
1Laboratoire de Chirurgie Expérimentale, Faculté de Médecine de Nancy, Université Henri Poincaré, Nancy I, France.
Circulation
|September 25, 2001
まとめ
脳死は,酸素の供給・需要の不均衡による心筋機能障害を引き起こし,その証拠は乳酸とアデノシンの増加である. ラベタロール治療は,この機能不全を緩和し,豚の有酸素代謝を維持しました.
科学分野:
- 心臓病学 心臓病学
- 神経学 神経学とは
- 生理学 生理学とは
背景:
- 脳死後の心臓機能不全は認められているが,よく理解されていない.
- 心筋力衰退は,脳死後の心臓機能不全に寄与するメカニズムである.
研究 の 目的:
- 心筋の酸素供給と需要の不均衡が脳死豚の心臓機能不全を引き起こすかどうかを調査する.
主な方法:
- 心臓マイクロダイアリスは,脳死豚およびラベタロールで治療された豚のインタースティシャル心筋乳酸およびアデノシンを測定するために使用されました.
- 心拍数,心臓の出力,冠動脈の血流を含む血液動力学的パラメータは,継続的にモニタリングされました.
主要な成果:
- 脳死ブタは,心拍数,心電量,冠動脈血流の増加を示したが,冠動脈血流の限られた増加は,機能性心筋不全症につながった.
- 心筋乳酸酸とアデノシン濃度の著しく上昇は,脳死豚のイシュケミアを確認した.
- ラベタロール治療は心臓機能と有酸素代謝を安定させ,心拍数とアデノシンが適度に上昇しただけであった.
結論:
- 脳死は,腸内アデノシンと乳酸の増加に関連した心筋機能障害を誘発する.
- この機能障害は,心筋の酸素消費と供給の不均衡から生じるようです.
- ラベタロールはこれらの効果を弱め,脳死後の心臓機能不全の管理における潜在的な役割を示唆した.
関連する概念動画
01:28Disorders of the Nervous Tissue
3.0K
Nervous tissue is a vital component of the human body's communication system, enabling us to perceive and respond to stimuli. However, like all other tissues, it is vulnerable to disorders and diseases that can significantly impact our neurological functioning.
Homeostatic Imbalances:
Alzheimer's disease manifests as a gradual decline in memory and cognitive abilities, attributed to the buildup of amyloid plaques and neurofibrillary tangles in the brain.
Parkinson's disease arises from the...
Homeostatic Imbalances:
Alzheimer's disease manifests as a gradual decline in memory and cognitive abilities, attributed to the buildup of amyloid plaques and neurofibrillary tangles in the brain.
Parkinson's disease arises from the...
3.0K
01:19Brainstem
7.5K
The brainstem, located inferior to the brain and superior to the spinal cord, serves as a bridge between the cerebrum and the spinal cord. It plays a vital role in relaying information and controlling critical life functions. It comprises three primary regions: the midbrain, pons, and medulla oblongata.
The Midbrain
The midbrain is located beneath the diencephalon and connects the cerebrum with the lower parts of the brain. The cerebral peduncles are prominent midbrain structures that house the...
The Midbrain
The midbrain is located beneath the diencephalon and connects the cerebrum with the lower parts of the brain. The cerebral peduncles are prominent midbrain structures that house the...
7.5K
01:26Transient Ischemic Attack l: Introduction
18
A transient ischemic attack (TIA) is a brief episode of neurological dysfunction caused by a temporary, focal reduction in cerebral blood flow. Although symptoms resemble those of an ischemic stroke, the interruption in perfusion is short-lived and does not cause permanent infarction. TIAs are clinically important because they often serve as early warning events for future stroke.Mechanisms of Transient Cerebral IschemiaTransient cerebral ischemia may arise through several mechanisms. One...
18
01:28Traumatic Brain Injury l: Introduction
25
DefinitionTraumatic brain injury, or TBI, is a disturbance of normal brain function induced by an external mechanical force, such as a direct blow to the head or a penetrating injury. It can affect both brain structure and function, producing a wide range of clinical outcomes. TBI is a heterogeneous condition, meaning its effects may differ based on the type, location, and severity of the injury.Basis of ClassificationTBI is classified based on severity, injury mechanism, or pathophysiology. In...
25
01:23Alzheimer Disease ll: Pathophysiology
35
Alzheimer disease involves structural changes in the brain that begin long before symptoms appear. The most distinctive features are extracellular neuritic plaques and intracellular neurofibrillary tangles.Neuritic plaques form in the cerebral cortex and around blood vessels. These plaques contain a dense core of beta-amyloid (Aβ)—a toxic protein fragment that clumps outside neurons. The core is surrounded by damaged neuronal extensions, as well as reactive astrocytes and...
35
01:22Dementia l: Introduction
35
Dementia is an acquired, progressive syndrome characterized by a decline in multiple cognitive domains severe enough to impair daily functioning and reduce independence. Although memory loss is a central feature, the diagnosis requires additional deficits involving language, executive function, visuospatial skills, judgment, calculation, or abstract reasoning. These cognitive impairments reflect underlying neurodegenerative or vascular processes that gradually disrupt neuronal networks...
35