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Pathophysiology of Heart Failure

Pathophysiology of Heart Failure

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...

Heart Failure I: Introduction

Heart Failure I: Introduction

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...

Heart Failure IV: Classification and Diagnostic Evaluation

Heart Failure IV: Classification and Diagnostic Evaluation

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...

Heart Failure II: Pathophysiology

Heart Failure II: Pathophysiology

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...

Heart Failure III: Clinical Manifestations

Heart Failure III: Clinical Manifestations

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...

Heart Failure VI: Adjunct Therapies

Heart Failure VI: Adjunct Therapies

Additional therapies for treating patients with heart failure (HF) may include procedural interventions, supplemental oxygen, the management of sleep disorders, and nutritional therapy.Procedural InterventionsImplantable Cardioverter-Defibrillator: For patients at risk of life-threatening arrhythmias due to severe left ventricular dysfunction, an Implantable Cardioverter-Defibrillator (ICD) can detect and terminate these arrhythmias, preventing sudden cardiac death and improving survival rates.

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Updated: Jun 25, 2026

Lumped-Parameter and Finite Element Modeling of Heart Failure with Preserved Ejection Fraction

Lumped-Parameter and Finite Element Modeling of Heart Failure with Preserved Ejection Fraction

Published on: February 13, 2021

Acute heart failure syndromes.

Mihai Gheorghiade¹, Peter S Pang²

¹Division of Cardiology, Department of Medicine, Northwestern University Feinberg School of Medicine, Chicago, Illinois.

Journal of the American College of Cardiology

|February 14, 2009

Summary

This summary is machine-generated.

Hospitalized heart failure patients often experience high readmission and mortality rates post-discharge. Addressing early post-discharge changes is crucial for improving outcomes in acute heart failure management.

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A Surgical Model of Heart Failure with Preserved Ejection Fraction in Tibetan Minipigs

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Lumped-Parameter and Finite Element Modeling of Heart Failure with Preserved Ejection Fraction

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A Surgical Model of Heart Failure with Preserved Ejection Fraction in Tibetan Minipigs

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Area of Science:

Cardiology
Internal Medicine
Health Services Research

Background:

Hospitalization for heart failure (HF) presents a substantial and escalating healthcare challenge.
HF patient populations are characterized by significant heterogeneity in presentation, pathophysiology, and prognosis.
Despite symptomatic improvement during hospitalization, early post-discharge rehospitalization and mortality rates remain high.

Purpose of the Study:

To highlight the critical need for improved post-discharge outcomes in acute heart failure management.
To identify contributing factors to high early post-discharge event rates.
To emphasize the potential of current therapies and future research in mitigating these risks.

Main Methods:

Review of current understanding of acute heart failure syndromes and post-discharge trajectories.
Analysis of factors contributing to early post-discharge adverse events.
Evaluation of existing assessment modalities and cardiovascular therapies.

Main Results:

Early post-discharge worsening of signs/symptoms, neurohormonal, and renal function are implicated in adverse events.
Current assessment tools and advanced therapies offer opportunities to enhance post-discharge care.
Significant knowledge gaps remain regarding specific pathophysiologic targets and optimal clinical trial designs.

Conclusions:

Improving post-discharge outcomes is the paramount objective in managing acute heart failure.
Further research into pathophysiologic mechanisms and innovative clinical trial designs is essential.
A multi-faceted approach combining current therapeutic advances and future research is needed to reduce the burden of heart failure readmissions and mortality.