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Pathophysiology of Heart Failure01:17

Pathophysiology of Heart Failure

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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 II: Pathophysiology01:29

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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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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 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 Drugs: Inotropic Agents01:26

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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...
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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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Updated: Apr 15, 2026

Cutoff Value of Phase Angle by Bioelectrical Impedance Analysis at Admission as a Prognostic Factor in Patients with Acute Heart Failure
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Cutoff Value of Phase Angle by Bioelectrical Impedance Analysis at Admission as a Prognostic Factor in Patients with Acute Heart Failure

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Acid-base and electrolyte abnormalities in heart failure: pathophysiology and implications.

Caterina Urso1, Salvatore Brucculeri, Gregorio Caimi

  • 1Dipartimento Biomedico di Medicina Interna e Specialistica, Universitá di Palermo, 90127, Palermo, Italy, ursocat@gmail.com.

Heart Failure Reviews
|March 31, 2015
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Summary

Congestive heart failure often causes dangerous electrolyte and acid-base issues due to disease processes and medications. Early detection of hyponatremia, magnesium, and potassium deficiencies is crucial for managing heart failure patients and preventing arrhythmias.

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Author Spotlight: Unveiling Prognostic Indicators in Heart Failure - The Role of Phase Angle and Bioelectrical Impedance Analysis
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Cutoff Value of Phase Angle by Bioelectrical Impedance Analysis at Admission as a Prognostic Factor in Patients with Acute Heart Failure
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Cutoff Value of Phase Angle by Bioelectrical Impedance Analysis at Admission as a Prognostic Factor in Patients with Acute Heart Failure

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Author Spotlight: Unveiling Prognostic Indicators in Heart Failure - The Role of Phase Angle and Bioelectrical Impedance Analysis
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Author Spotlight: Unveiling Prognostic Indicators in Heart Failure - The Role of Phase Angle and Bioelectrical Impedance Analysis

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Area of Science:

  • Cardiology
  • Nephrology
  • Internal Medicine

Background:

  • Congestive heart failure (CHF) is frequently associated with electrolyte and acid-base disturbances.
  • These abnormalities can arise from the pathophysiology of CHF, including neurohumoral activation (renin-angiotensin-aldosterone system, sympathoadrenergic system).
  • Therapeutic interventions such as diuretics, cardiac glycosides, and ACE inhibitors can also contribute to these complications.

Purpose of the Study:

  • To highlight the frequency and potential dangers of electrolyte and acid-base abnormalities in CHF patients.
  • To elucidate the pathophysiological mechanisms underlying these complications.
  • To emphasize the importance of early identification for effective patient management.

Main Methods:

  • Review of pathophysiological mechanisms in congestive heart failure.
  • Analysis of adverse effects of common CHF therapies.
  • Identification of key electrolyte disturbances in CHF.

Main Results:

  • CHF patients commonly exhibit hyponatremia.
  • Deficiencies in magnesium and potassium are prevalent in CHF.
  • These deficiencies, particularly potassium and magnesium, are strongly linked to cardiac arrhythmias.

Conclusions:

  • Electrolyte and acid-base imbalances are significant complications in congestive heart failure.
  • Understanding the underlying mechanisms of neurohumoral activation and therapeutic side effects is key.
  • Prompt recognition and management of these abnormalities are vital for improving outcomes and preventing arrhythmias in CHF patients.