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相关概念视频

Pathophysiology of Heart Failure01:17

Pathophysiology of Heart Failure

1.8K
Heart failure (HF) is a progressive syndrome involving ventricles that leads to inadequate cardiac output. It can be classified based on location and output or ejection fraction. Ejection fraction (EF) is an essential measurement in the diagnosis and surveillance of HF. Reduced EF corresponds to systolic heart failure (HFrEF). However, HF with preserved ejection fraction (HFpEF) is becoming increasingly prevalent. Also known as diastolic HF, this form of HF is related to aging. The...
1.8K
Heart Failure II: Pathophysiology01:29

Heart Failure II: Pathophysiology

37
Systolic Heart Failure and Compensatory MechanismsSystolic heart failure (also termed HFrEF, Heart Failure with Reduced Ejection Fraction) is the most prevalent type of heart filure. It results in a decreased volume of blood being pumped from the ventricle. The aortic arch and carotid sinuses have baroreceptors that detect reduced blood pressure, triggering the sympathetic nervous system (SNS) to release epinephrine and norepinephrine. Initially, this response aims to boost heart rate and...
37
Heart Failure I: Introduction01:27

Heart Failure I: Introduction

52
Heart failure refers to a clinical syndrome caused by structural or functional cardiac disorders that prevent the heart from pumping an adequate amount of blood to meet the body's metabolic needs. This condition often arises from myocardial infarction or ischemia, leading to decreased cardiac output, reduced tissue perfusion, impaired gas exchange, fluid volume imbalance, and decreased functional ability.Heart failure can result from disruptions in the mechanisms that regulate cardiac output...
52
Coronary Artery Disease II: Pathophysiology01:26

Coronary Artery Disease II: Pathophysiology

33
Coronary Artery Disease (CAD) originates from a series of events that impair the function of coronary arteries, the blood vessels responsible for delivering oxygen-rich blood to the heart muscle. The pathophysiology of CAD is closely linked to atherosclerosis, a chronic inflammatory and lipid-driven condition affecting the vascular endothelium.1. Endothelial DamageThe process begins with damage to the vascular endothelium, which serves as a protective barrier between the blood and the vessel...
33
Heart Failure IV: Classification and Diagnostic Evaluation01:30

Heart Failure IV: Classification and Diagnostic Evaluation

32
Heart failure can be classified in various ways, with the most common classifications based on physical activity limitations, disease progression, severity, and treatment strategies.The Functional Classification of Heart Failure divides patients into four categories based on physical activity limitation due to symptom burden.Class I: Patients in this class have cardiac disease but no physical activity limitations. Ordinary activities like walking, climbing stairs, or routine tasks do not cause...
32
Imbalances in Cardiac Output01:26

Imbalances in Cardiac Output

1.5K
The heart's primary function is to pump blood throughout the body, maintaining a balance between blood sent out (cardiac output) and blood returning (venous return). If this balance is disrupted, it can result in congestive heart failure (CHF), a severe condition where the heart becomes an inefficient pump, leading to inadequate blood circulation.
CHF can occur due to the failure of either side of the heart. Left-side failure leads to pulmonary congestion—the right side continues to send...
1.5K

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相关实验视频

Updated: Sep 10, 2025

A Surgical Model of Heart Failure with Preserved Ejection Fraction in Tibetan Minipigs
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在心力衰竭中冠状动脉疾病

Ryohei Ono1, Luiz Menezes Falcão2

  • 1Department of Cardiovascular Medicine, Chiba University Graduate School of Medicine, Chiba, Japan; British Heart Foundation Cardiovascular Research Centre, University of Glasgow, Glasgow, United Kingdom.

The American journal of cardiology
|August 27, 2025
PubMed
概括

冠状动脉疾病 (CAD) 显著导致心力衰竭与保存的射出分数 (HFpEF). 鉴定缺血表型对于更好的风险评估和治疗策略至关重要.

关键词:
在HFpEF心脏衰竭冠状动脉疾病冠状动脉微血管功能障碍病理生理学

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Lumped-Parameter and Finite Element Modeling of Heart Failure with Preserved Ejection Fraction
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科学领域:

  • 心脏病学
  • 心脏衰竭的研究
  • 缺血性心脏病

背景情况:

  • 冠状动脉疾病 (CAD),包括表心和微血管功能障碍 (CMD),是心力衰竭的主要因素.
  • 心脏病的存在与不良结果,心肌重塑和进展到减少的喷射分数相关.
  • 冠状动脉微血管功能障碍 (CMD) 在女性中更为常见,影响心肌输液和能量,导致运动不耐受和增加填充压力.

研究的目的:

  • 突出出缺血表型在心力衰竭中具有保留的喷射分数 (HFpEF) 的重要性.
  • 强调冠状动脉疾病 (CAD) 在HFpEF病理生理学和结果中的作用.
  • 讨论HFpEF中CAD的诊断和治疗方面的考虑.

主要方法:

  • 对冠状动脉疾病 (CAD) 和心力衰竭 (HFpEF) 的当前文献的综述.
  • 对患有缺血的HFpEF表型进行SGLT2抑制剂和芬瑞等新兴治疗方法的讨论.
  • 强调多式诊断技术来识别亚临床CAD和CMD.

主要成果:

  • 冠状动脉疾病 (CAD) 是HFpEF的关键驱动因素,与预后不佳和疾病进展有关.
  • 冠状动脉微血管功能障碍 (CMD) 特别影响心脏功能,并导致运动不耐受等症状.
  • 新型疗法在各种HFpEF类型中表现有前途,包括缺血组分.

结论:

  • 在HFpEF中识别缺血模式对于准确的风险分层和指导治疗决策至关重要.
  • 多模式诊断对于检测CMD和亚临床CAD至关重要.
  • 未来的研究应探索表型特定的方法,以提高异质HFpEF群体的结果.