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Related Concept Videos

Pathophysiology of Heart Failure01:17

Pathophysiology of Heart Failure

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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...
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Imbalances in Cardiac Output01:26

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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...
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Heart Failure I: Introduction01:27

Heart Failure I: Introduction

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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...
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Heart Failure II: Pathophysiology01:29

Heart Failure II: Pathophysiology

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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...
1.7K
Heart Failure III: Clinical Manifestations01:26

Heart Failure III: Clinical Manifestations

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Heart failure (HF) manifests primarily as dyspnea, fatigue, and fluid retention, resulting in peripheral and pulmonary edema. Symptoms may vary depending on which ventricle is more affected, left or right.Left-Sided Heart FailureAlso known as left ventricular failure, this condition results from the left ventricle's inability to fill or eject sufficient blood into the systemic circulation. It leads to pulmonary congestion, which occurs when the left ventricle fails to eject blood effectively...
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Heart Failure IV: Classification and Diagnostic Evaluation01:30

Heart Failure IV: Classification and Diagnostic Evaluation

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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...
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Related Experiment Video

Updated: Apr 28, 2026

Lumped-Parameter and Finite Element Modeling of Heart Failure with Preserved Ejection Fraction
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Heart failure with normal left ventricular ejection fraction.

Micha T Maeder1, David M Kaye

  • 1Heart Failure Research Group, Baker IDI Heart and Diabetes Institute, and Heart Center, Alfred Hospital, St Kilda Road, Central Melbourne 8008 VIC, Australia.

Journal of the American College of Cardiology
|March 14, 2009
PubMed
Summary
This summary is machine-generated.

Heart failure with normal ejection fraction (HFNEF) affects half of heart failure patients. This review details HFNEF

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Area of Science:

  • Cardiology
  • Heart Failure Research
  • Clinical Pathophysiology

Background:

  • Approximately 50% of heart failure patients exhibit preserved left ventricular ejection fraction (HFNEF).
  • HFNEF is increasingly recognized as a heterogeneous condition, not a singular entity.
  • Existing research often treats HFNEF as a uniform group, potentially obscuring diverse underlying mechanisms.

Purpose of the Study:

  • To critically review and synthesize current data on the pathophysiology of HFNEF.
  • To contextualize these findings within a new diagnostic algorithm for HFNEF.
  • To explore potential future therapeutic strategies based on mechanistic insights.

Main Methods:

  • Comprehensive literature review of studies on HFNEF pathophysiology.
  • Analysis of echocardiographic measures and biomarkers commonly used in HFNEF diagnosis.
  • Integration of pathophysiologic data with diagnostic and therapeutic considerations.

Main Results:

  • HFNEF encompasses multiple distinct pathophysiologic pathways.
  • Echocardiographic measures and biomarkers show variable utility in differentiating HFNEF subtypes.
  • Mechanistic understanding is crucial for developing targeted therapies.

Conclusions:

  • HFNEF is a complex syndrome with diverse underlying mechanisms requiring tailored approaches.
  • A refined diagnostic algorithm incorporating mechanistic insights is proposed.
  • Future therapies should target specific pathophysiologic pathways within the HFNEF spectrum.