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Related Concept Videos

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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Pathophysiology of Heart Failure01:17

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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 I: Introduction01:27

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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 VI: Adjunct Therapies01:22

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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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Heart Failure Drugs: Diuretics01:22

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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...
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Heart Failure V: Medical Management01:30

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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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Related Experiment Video

Updated: Jan 26, 2026

Assessment of Physical Activity Intensity with Accelerometers and Oxygen Consumption
08:45

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Published on: June 20, 2025

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Feasibility of Using Accelerometer Measurements to Assess Habitual Physical Activity in Rural Heart Failure Patients.

Lufei Young1, Melody Hertzog2, Susan Barnason3

  • 1College of Nursing, Augusta University, Augusta, GA 30912, USA. luyoung@augusta.edu.

Geriatrics (Basel, Switzerland)
|April 24, 2019
PubMed
Summary

Accelerometers accurately measure physical activity (PA) in rural heart failure (HF) patients. This reliable tool is feasible for assessing PA over time in this population.

Keywords:
ActiGraphaccelerometerfeasibilityheart failurephysical activityreliabilityrural health

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Area of Science:

  • Cardiology
  • Rehabilitation Medicine
  • Biomedical Engineering

Background:

  • Physical inactivity is a significant issue for patients with heart failure (HF), particularly in rural settings.
  • Effective interventions to improve physical activity (PA) require accurate and reliable assessment tools.
  • Current PA assessment methods may not be feasible or acceptable for all HF patients.

Purpose of the Study:

  • To evaluate the feasibility of using accelerometers for PA assessment in rural HF patients.
  • To determine the reliability of accelerometer-based PA measurements over time in this population.
  • To identify factors influencing accelerometer wear time in HF patients.

Main Methods:

  • 100 rural heart failure patients wore accelerometers at baseline, 3, and 6 months post-discharge.
  • Feasibility assessed by adherence to wear protocol and average wear time (weekdays and weekends).
  • Reliability evaluated using intra-class correlation (ICC) for key PA metrics.

Main Results:

  • Average daily wear time was approximately 15.7-15.8 hours.
  • Around 50% of participants adhered to the wear protocol across all time points.
  • High reliability (ICC > 0.879) was observed for daily activity calories, activity counts, and moderate-to-vigorous PA.

Conclusions:

  • Accelerometers demonstrate feasibility for assessing habitual physical activity in rural HF patients.
  • Accelerometer measurements provide reliable data on PA levels over a 6-month period.
  • This technology can support the development and evaluation of PA interventions for HF patients.