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Skeletal Muscle Relaxants: Adverse Effects01:21

Skeletal Muscle Relaxants: Adverse Effects

Skeletal muscle relaxants are widely used for muscle paralysis and relieving pain following any muscle injury or stiffness. However, depending on the drug type, they can have adverse effects that range from mild to severe. Usually, nondepolarizing neuromuscular blockers have minimal side effects. For example, drugs like d-tubocurarine, cisatracurium, and rocuronium cause hypotension, whereas drugs like baclofen, when stopped abruptly, can lead to the recurrence of spastic conditions.
Unlike...
Heart Failure Drugs: Inhibitors of Renin-Angiotensin System01:26

Heart Failure Drugs: Inhibitors of Renin-Angiotensin System

The activation of the sympathetic nervous system and the renin-angiotensin-aldosterone system (RAAS) contributes to cardiac remodeling, and inhibiting the RAAS is a pharmacological target in heart failure management. As a result, neurohumoral modulation is a crucial treatment principle for managing heart failure. This approach involves using medications like ACE inhibitors (ACEIs), angiotensin receptor blockers (ARBs), β-blockers, mineralocorticoid receptor antagonists (MRAs), and neutral...
CNS Depressants: Alcohol and Nicotine01:27

CNS Depressants: Alcohol and Nicotine

Ethanol, a clear colorless alcohol, has been consumed by humans for millennia, but its effects on the body are far from benign. At lower doses, it induces decreased inhibitions and loquaciousness, leading to its social appeal. However, it can cause severe consequences at higher doses, such as coma and respiratory depression, due to its zero-order elimination kinetics. Chronic ethanol abuse wreaks havoc on multiple organ systems, particularly the CNS and the liver. Abrupt cessation of ethanol...
Effect of Hepatic Disease on Pharmacokinetics: Dose Adjustments Due to Hepatic Impairment01:08

Effect of Hepatic Disease on Pharmacokinetics: Dose Adjustments Due to Hepatic Impairment

Hepatic impairment, characterized by decreased liver function, does not uniformly mandate adjustments in drug dosage. Whether dosage modifications are necessary depends on various factors related to the drug's metabolism and elimination pathways. If a drug is primarily excreted via the kidneys and bypasses significant hepatic processing, if it undergoes minimal metabolic transformation in the liver, or if it is volatile and primarily expelled through the lungs, dose adjustments may not be...
Drug toxicity: Drug–Drug Interaction01:30

Drug toxicity: Drug–Drug Interaction

Drug–drug interactions can precipitate toxicity through multiple mechanisms. Absorption interactions alter how drugs enter the body, exemplified when ranitidine increases the absorption of basic drugs, while cholestyramine decreases the levels of propranolol. Protein binding interactions occur when drugs share the same binding sites on plasma proteins. Drugs like aspirin and warfarin, when bound in excess, can lead to increased free drug concentrations, enhancing the potential for...
Depressants01:28

Depressants

Depressant drugs, including alcohol and sedative-hypnotics, diminish central nervous system activity by enhancing the action of gamma-aminobutyric acid (GABA), a neurotransmitter that reduces brain activity and promotes relaxation. These substances can have various therapeutic uses but also pose significant risks, especially when misused or combined.
Alcohol is a common depressant that can induce a sense of relaxation and reduced inhibition at low doses. Contrary to its occasional...

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関連する実験動画

Updated: Jul 8, 2026

Programmed Electrical Stimulation in Mice
07:29

Programmed Electrical Stimulation in Mice

Published on: May 26, 2010

予備療法は,心筋麻痺を緩和しない.

M Ovize1, K Przyklenk, S L Hale

  • 1Heart Institute Research, Hospital of the Good Samaritan, Los Angeles, CA 90017.

Circulation
|June 1, 1992
PubMed
まとめ

筋臓の予備条件付けは,可逆性イシュケミア中の収縮機能不全から保護したり,再注射後の麻痺を予防したりしません. この研究では,犬のモデルでの予備条件付けの利点が認められず,以前の発見に異議を唱えた.

科学分野:

  • 心臓病学 心臓病学
  • 心血管生理学 心血管の生理学
  • 発血性心臓病 発血性心臓病 発血性心臓病 発血性心臓病とは

背景:

  • 発心筋の予備条件付けは,典型的には,長期にわたるイシュケミアの後に心臓発作のサイズを減らす.
  • 以前の研究によると,プリコンディショニングは,心筋梗塞の周辺組織における収縮機能不全を緩和しない可能性がある.
  • 短期のイシュケミアを患った不動性心筋に予備条件付けの効果は不明でした.

研究 の 目的:

  • リバーシブル・イシュケミア中の心筋収縮機能に対する予備条件の効果を調査する.
  • 予備条件付けが,短時間の血栓不全の後に心筋麻痺を防ぐかどうかを判断する.
  • プリコンディショニング療法の効果を評価するために,プリコンディショニング療法の効果は,プリコンディショニング療法の効果自体によって損なわれない心筋膜に及ぼす影響を評価する.

主な方法:

  • 心筋麻痺の犬のモデルを利用した.
  • 3つの治療群:対照群,5分間の閉塞/5分間の再注血 (PC5) と15分間の不全性外傷の前に2.5分間の閉塞/5分間の再注血 (PC2.5) を投与しました.
  • ソノミクロメトリーによるセグメント縮小 (SS) のモニタリングと,放射性標識のマイクロ球を用いた心筋血流の評価.

主要な成果:

  • すべてのグループは,15分間の閉塞の間,類似したイシュケミアのレベルを経験しました.

さらに関連する動画

A Prediction Error-driven Retrieval Procedure for Destabilizing and Rewriting Maladaptive Reward Memories in Hazardous Drinkers
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Published on: January 5, 2018

Disruption of Frontal Lobe Neural Synchrony During Cognitive Control by Alcohol Intoxication
09:26

Disruption of Frontal Lobe Neural Synchrony During Cognitive Control by Alcohol Intoxication

Published on: February 6, 2019

関連する実験動画

Last Updated: Jul 8, 2026

Programmed Electrical Stimulation in Mice
07:29

Programmed Electrical Stimulation in Mice

Published on: May 26, 2010

A Prediction Error-driven Retrieval Procedure for Destabilizing and Rewriting Maladaptive Reward Memories in Hazardous Drinkers
08:05

A Prediction Error-driven Retrieval Procedure for Destabilizing and Rewriting Maladaptive Reward Memories in Hazardous Drinkers

Published on: January 5, 2018

Disruption of Frontal Lobe Neural Synchrony During Cognitive Control by Alcohol Intoxication
09:26

Disruption of Frontal Lobe Neural Synchrony During Cognitive Control by Alcohol Intoxication

Published on: February 6, 2019

  • PC5グループは,メインの侮辱の前に有意な麻酔を示したが,PC2.5はそうではなかった.
  • グループ間では,イシェミア中のセグメントの縮小や,再注射後の麻痺の度合いの有意な違いは観察されなかった.

    • 結論:

    • 発心筋の予備条件付けは,可逆性イシュケミア中の収縮機能を保たなかった.
    • 予備条件付けは,再注射の最初の数時間で心筋麻痺を防ぐことはできませんでした.
    • 付随の血流と機能的回復の間の関係は,予備条件付けによって変化しませんでした.