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Related Concept Videos

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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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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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...
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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 V: Medical Management01:30

Heart Failure V: Medical Management

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Medical Management of Acute Decompensated Heart Failure (ADHF)The primary goals of therapy for patients hospitalized with acute decompensated heart failure (ADHF) include:Relieving symptomsOptimizing volume statusSupporting oxygenation and ventilationMaintaining cardiac output (CO) and end-organ perfusionIdentifying and addressing the cause of ADHFPreventing complicationsProviding patient education on factors precipitating HF exacerbationPlanning for dischargeOngoing monitoring and assessment...
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Heart Failure VII: Nursing Interventions01:30

Heart Failure VII: Nursing Interventions

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The first step in nursing management of a patient with heart failure involves thoroughly assessing the patient's medical history.Subjective Data: Obtain the patient's medical history of coronary artery disease, hypertension, myocardial infarction, and symptoms like dyspnea, orthopnea, and paroxysmal nocturnal dyspnea.Objective Data: Conduct a physical examination to identify findings such as jugular vein distention, pulmonary crackles, tachycardia, murmurs, peripheral edema, and vital signs,...
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Related Experiment Video

Updated: Aug 12, 2025

Lumped-Parameter and Finite Element Modeling of Heart Failure with Preserved Ejection Fraction
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Heart failure classification based on resting ejection fraction does not display a unique exercise response pattern.

Simon Wernhart1, Maria Papathanasiou1, Tienush Rassaf1

  • 1University Hospital Essen, University Duisburg-Essen, West German Heart- and Vascular Center, Department of Cardiology and Vascular Medicine, Hufelandstrasse 55, 45147 Essen, Germany.

International Journal of Cardiology
|January 30, 2023
PubMed
Summary

Heart failure with preserved ejection fraction (HFpEF), mildly reduced ejection fraction (HFmrEF), and reduced ejection fraction (HFrEF) do not show distinct cardiopulmonary exercise testing (CPET) profiles. CPET variables may help better define heart failure phenotypes beyond ejection fraction categories.

Keywords:
CPET profileCardiopulmonary exercise testingEjection fractionHeart failure

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Area of Science:

  • Cardiology
  • Exercise Physiology
  • Heart Failure Research

Background:

  • The categorization of heart failure (HF) into preserved (HFpEF), mildly reduced (HFmrEF), and reduced (HFrEF) ejection fraction (EF) is debated.
  • It remains unclear if these HF classifications correspond to distinct exercise limitation patterns identified through cardiopulmonary exercise testing (CPET).
  • This study investigates differences in CPET variables across the three main HF categories.

Purpose of the Study:

  • To determine if cardiopulmonary exercise testing (CPET) variables differ significantly among patients with heart failure with preserved ejection fraction (HFpEF), mildly reduced ejection fraction (HFmrEF), and reduced ejection fraction (HFrEF).
  • To assess the utility of CPET in characterizing heart failure phenotypes beyond traditional ejection fraction-based classifications.

Main Methods:

  • Analysis of CPET variables from stable patients diagnosed with HFpEF (n=123), HFmrEF (n=31), and HFrEF (n=153).
  • The primary outcome was the association between HF category and peak oxygen consumption (VO2peak).
  • Secondary outcomes included the association between HF category and oxygen uptake efficiency slope (OUES) and the increase of O2 pulse (ΔO2 pulse).

Main Results:

  • Peak oxygen consumption (VO2peak) showed a significant decline across all HF categories (HFpEF > HFmrEF > HFrEF, p < 0.001).
  • Oxygen uptake efficiency slope (OUES) differed significantly between HFpEF and HFrEF (p < 0.001), and between HFmrEF and HFrEF (p = 0.004).
  • The increase of O2 pulse (ΔO2 pulse) differed between HFpEF and HFrEF (p < 0.001), and between HFpEF and HFmrEF (p = 0.049). No significant differences were observed in CPET variables between HFrEF patients with and without LVAD support.

Conclusions:

  • Heart failure, irrespective of ejection fraction category, does not exhibit a distinct cardiopulmonary exercise testing (CPET) profile.
  • Ejection fraction-based categorization alone may not fully capture the spectrum of exercise limitations in heart failure patients.
  • CPET variables hold potential for refining the characterization of heart failure phenotypes.