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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

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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Author Spotlight: Investigating HR-Dependent Cardiac Function in Mouse Models Through a Novel Atrial-Pacing Approach
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Why Dyssynchrony Matters in Heart Failure?

Bhupendar Tayal1, Peter Sogaard1, Niels Risum2

  • 1Department of Cardiology, Aalborg University Hospital, Hobrovej 18-22, Aalborg 9100, Denmark.

Cardiac Electrophysiology Clinics
|February 6, 2019
PubMed
Summary
This summary is machine-generated.

Predicting cardiac resynchronization therapy (CRT) response requires methods reflecting the electrical substrate. New physiological approaches are superior to time-to-peak dyssynchrony for predicting CRT response in heart failure patients.

Keywords:
Cardiac resynchronization therapyDyssynchronyHeart failure

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Area of Science:

  • Cardiology
  • Biomedical Engineering
  • Electrophysiology

Background:

  • Cardiac resynchronization therapy (CRT) addresses electrical problems in heart failure (HF).
  • Accurate prediction of CRT response is crucial for patient outcomes.
  • Existing methods like time-to-peak dyssynchrony have limitations in reflecting the electrical substrate.

Purpose of the Study:

  • To evaluate the efficacy of different methods in predicting CRT response.
  • To differentiate between methods based on electrical substrate versus indirect measures.
  • To identify superior physiological approaches for CRT response prediction.

Main Methods:

  • Comparison of time-to-peak dyssynchrony with new physiological methods.
  • Assessment of methods' ability to reflect the electrical substrate in HF patients.
  • Analysis of prediction accuracy for CRT response.

Main Results:

  • Time-to-peak dyssynchrony is unspecific, potentially reflecting scar/fibrosis instead of conduction delay.
  • New physiological methods, based on activation delay-induced HF, demonstrate superior prediction of CRT response.
  • Time-to-peak dyssynchrony may still be useful for prognosis in specific HF patient groups.

Conclusions:

  • Physiological methods are superior to time-to-peak dyssynchrony for predicting CRT response.
  • Understanding the electrical substrate is key for effective CRT response prediction.
  • Time-to-peak dyssynchrony has a limited role in predicting CRT response but may aid prognosis.