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Related Concept Videos

Heart Failure Drugs: Inotropic Agents01:26

Heart Failure Drugs: Inotropic Agents

Positive inotropic agents are commonly used as the first line of treatment for heart failure. One such agent is digoxin, derived from the genus Digitalis, which has been known for centuries but effectively utilized since 1785. However, these cardiac glycosides can have potentially toxic effects due to their mechanism of action, which involves inhibiting Na+/K+-ATPase and increasing contractility. Digoxin is absorbed orally and distributed in various tissues, including the CNS. It has a long...
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...
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...
Muscle Stimulation Frequency01:22

Muscle Stimulation Frequency

The contraction strength of muscles is regulated by motor neurons, which modulate the frequency of action potentials dispatched to the motor units based on the body's requirements. This process of varying the muscle stimulation frequency allows muscles to contract with a force that is precisely tailored to the needs of the moment, whether lifting a feather or a heavy box.
Wave summation
At low firing rates, motor neurons induce individual twitch contractions in muscle fibers. These twitches...
Heart Failure V: Medical Management01:30

Heart Failure V: Medical Management

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...
Heart Failure III: Clinical Manifestations01:26

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...

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Related Experiment Video

Updated: Jul 4, 2026

Application of Chronic Stimulation to Study Contractile Activity-induced Rat Skeletal Muscle Phenotypic Adaptations
09:50

Application of Chronic Stimulation to Study Contractile Activity-induced Rat Skeletal Muscle Phenotypic Adaptations

Published on: January 25, 2018

Low-frequency electromyostimulation and chronic heart failure.

J-M Casillas1, V Gremeaux, M Labrunee

  • 1Pôle rééducation-réadaptation, CHU de Dijon, 23, rue Gaffarel, 21079 Dijon cedex, France. jean-marie.casillas@chu-dijon.fr

Annales De Readaptation Et De Medecine Physique : Revue Scientifique De La Societe Francaise De Reeducation Fonctionnelle De Readaptation Et De Medecine Physique
|June 14, 2008
PubMed
Summary

Low-frequency electromyostimulation (EMS) improves muscle oxidative capacity and physical performance in chronic heart failure (CHF) patients. This cost-effective therapy offers an alternative to conventional training, even in severe cases.

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Last Updated: Jul 4, 2026

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Published on: January 25, 2018

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Area of Science:

  • Cardiology
  • Exercise Physiology
  • Rehabilitation Medicine

Background:

  • Chronic heart failure (CHF) is characterized by skeletal muscle abnormalities leading to exercise intolerance.
  • Conventional physical training improves aerobic capacity but may not be feasible for all CHF patients.

Purpose of the Study:

  • To evaluate the efficacy and safety of low-frequency electromyostimulation (EMS) as an alternative to physical training in CHF patients.
  • To assess EMS's impact on muscle oxidative capacity, aerobic performance, and physical capacity.

Main Methods:

  • Low-frequency electromyostimulation (EMS) applied to skeletal muscles.
  • Assessment of muscle oxidative capacity, aerobic performance, and physical capacity.
  • Evaluation of local and hemodynamic tolerance, and contraindications.

Main Results:

  • EMS significantly improves muscle oxidative capacity, enhancing aerobic performance and physical capacity comparable to conventional training.
  • No local or hemodynamic intolerance was reported, even in severe CHF.
  • Pacemakers are a relative contraindication, while implanted defibrillators are absolute contraindications.

Conclusions:

  • Low-frequency EMS is a safe and effective alternative for improving exercise capacity in CHF patients, especially when conventional training is not possible or tolerated.
  • EMS offers a viable option for patients with high deconditioning, contraindications, or unwillingness to participate in physical activities.
  • The low cost and ease of setup suggest a potential for wider future adoption of EMS in CHF management.