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Related Concept Videos

Heart Failure I: Introduction01:27

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...
Pathophysiology of Heart Failure01:17

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...
Mitochondria01:37

Mitochondria

Mitochondria are eukaryotic cellular organelles that are known to produce energy through a process called oxidative phosphorylation. Besides their primary function, mitochondria are involved in various cellular processes, including cell growth, differentiation, signaling, metabolism, and senescence. Age-related changes cause a decline in mitochondrial quality and integrity due to increased mitochondrial mutations and oxidative damage. Thus, aging can severely impact mitochondrial functions,...
Mitochondria01:37

Mitochondria

Mitochondria are eukaryotic cellular organelles that are known to produce energy through a process called oxidative phosphorylation. Besides their primary function, mitochondria are involved in various cellular processes, including cell growth, differentiation, signaling, metabolism, and senescence. Age-related changes cause a decline in mitochondrial quality and integrity due to increased mitochondrial mutations and oxidative damage. Thus, aging can severely impact mitochondrial functions,...
Heart Failure II: Pathophysiology01:29

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...
Imbalances in Cardiac Output01:26

Imbalances in Cardiac Output

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 blood...

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Related Experiment Video

Updated: Jul 9, 2026

Robust Mitochondrial Isolation from Rodent Cardiac Tissue
07:03

Robust Mitochondrial Isolation from Rodent Cardiac Tissue

Published on: August 23, 2024

Mitochondria and heart failure.

Andrew J Murray1, Lindsay M Edwards, Kieran Clarke

  • 1Department of Physiology, Anatomy & Genetics, University of Oxford, Oxford, UK. andrew.james.murray@gmail.com [corrected]

Current Opinion in Clinical Nutrition and Metabolic Care
|December 20, 2007
PubMed
Summary

Mitochondrial dysfunction contributes to heart failure by impairing cardiac and skeletal muscle energy production. New therapies targeting mitochondrial health are needed to improve quality of life for heart failure patients.

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Phosphorus-31 Magnetic Resonance Spectroscopy: A Tool for Measuring In Vivo Mitochondrial Oxidative Phosphorylation Capacity in Human Skeletal Muscle
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Phosphorus-31 Magnetic Resonance Spectroscopy: A Tool for Measuring In Vivo Mitochondrial Oxidative Phosphorylation Capacity in Human Skeletal Muscle

Published on: January 19, 2017

Area of Science:

  • Cardiology
  • Mitochondrial Biology
  • Muscle Physiology

Background:

  • Heart failure is characterized by energetic abnormalities in cardiac and skeletal muscle.
  • Mitochondrial dysfunction is a key cellular mechanism underlying these energetic deficits.

Purpose of the Study:

  • To elucidate the causes of mitochondrial myopathy in heart failure.
  • To identify strategies for improving cardiac and skeletal muscle function and patient quality of life.

Main Methods:

  • Review of recent studies on mitochondrial dysfunction in heart failure.
  • Analysis of factors contributing to mitochondrial stress, including elevated fatty acids and hypoxia.

Main Results:

  • Elevated free fatty acids decrease metabolic efficiency and increase insulin resistance.
  • Tissue hypoxia leads to oxidative stress, mitochondrial DNA damage, and reduced mitochondrial mass.
  • Therapies protecting mitochondrial function show promise in heart failure models.

Conclusions:

  • Heart failure necessitates novel therapeutic approaches beyond current treatments.
  • New drugs should optimize substrate metabolism, maintain mitochondrial integrity, and enhance oxidative capacity.
  • Improving mitochondrial function may alleviate heart failure symptoms and enhance muscle performance.