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Related Concept Videos

Heart Failure II: Pathophysiology01:29

Heart Failure II: Pathophysiology

964
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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Pathophysiology of Heart Failure01:17

Pathophysiology of Heart Failure

3.8K
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...
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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...
903
Heart Failure VI: Adjunct Therapies01:22

Heart Failure VI: Adjunct Therapies

348
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.
348
Heart Failure Drugs: Diuretics01:22

Heart Failure Drugs: Diuretics

987
Heart failure and kidney perfusion are interconnected in a complex way. Reduced renal perfusion and venous congestion are two significant factors that contribute to renal dysfunction in heart failure. The kidneys, primarily responsible for fluid balance in the body, are adversely affected due to compromised cardiac output and increased venous pressure. In response to reduced renal perfusion, the kidneys activate neurohumoral mechanisms to restore balance. However, these mechanisms can be...
987
Heart Failure V: Medical Management01:30

Heart Failure V: Medical Management

330
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...
330

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Related Experiment Video

Updated: Feb 6, 2026

A Rat Model of Pressure Overload Induced Moderate Remodeling and Systolic Dysfunction as Opposed to Overt Systolic Heart Failure
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Mitochondrial dysfunction in pathophysiology of heart failure.

Bo Zhou, Rong Tian

    The Journal of Clinical Investigation
    |August 21, 2018
    PubMed
    Summary

    Mitochondrial dysfunction in heart failure shifts from energy failure to a destructive process. New research reveals complex mechanisms driving this "suicide mission" for novel therapeutic targets.

    Area of Science:

    • Cardiovascular Biology
    • Mitochondrial Medicine
    • Pathophysiology

    Background:

    • Mitochondrial dysfunction is a known factor in heart failure development.
    • Traditionally viewed as an energy production deficit, its role is now understood to be more complex.

    Purpose of the Study:

    • To review recent evidence on the multifaceted role of mitochondria in pathological cardiac remodeling.
    • To explore how mitochondrial functions transition from compensatory to detrimental in heart failure.

    Main Methods:

    • Comprehensive review of current scientific literature.
    • Synthesis of data on pathophysiological mechanisms driving mitochondrial dysfunction in heart failure.

    Main Results:

    • Mitochondrial dysfunction involves vicious cycles during cardiac remodeling.

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  • Key mechanisms include metabolic flux bottlenecks, redox imbalance, and impaired calcium handling.
  • Reactive oxygen species (ROS)-induced ROS generation and inflammation also contribute significantly.

    • Conclusions:

    • Mitochondrial dysfunction in heart failure is an active, detrimental process, not just passive energy failure.
    • Understanding these complex mechanisms offers new therapeutic strategies for heart failure.