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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 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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Imbalances in Cardiac Output01:26

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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...
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Cardiomyopathy III: Hypertrophic Cardiomyopathy01:29

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Hypertrophic cardiomyopathy, or HCM, is an autosomal dominant genetic disorder characterized by asymmetric left ventricular hypertrophy without ventricular dilation. It is more common in men and is typically diagnosed in young, athletic adults.EtiologyHCM is primarily genetic and is caused by mutations in genes encoding sarcomeric proteins. Researchers have identified over 1400 mutations across at least 11 different genes. Among these, the most frequently occurring mutations are found in 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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Cardiomyopathy II: Dilated Cardiomyopathy01:30

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Dilated cardiomyopathy, or DCM, is a progressive myocardial disorder characterized by ventricular chamber dilation and contractile dysfunction.EtiologyVarious factors can cause DCM, including hypertension and heavy alcohol intake, which contribute to the weakening and enlargement of the heart muscle. Viral infections, such as Coxsackievirus B, adenoviruses, and influenza, can lead to DCM by causing inflammation and damage to heart tissue. Certain chemotherapeutic agents, including daunorubicin,...
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Cardiac Obesity and Cardiac Cachexia: Is There a Pathophysiological Link?

K Selthofer-Relatić1,2, A Kibel1,3, D Delić-Brkljačić4,5

  • 1Department for Cardiovascular Disease, University Hospital Osijek, Josipa Huttlera 4, 31000 Osijek, Croatia.

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Cardiac obesity and cachexia are linked to heart failure. This study explores whether excessive fat or severe weight loss poses a greater risk to heart health and prognosis.

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Area of Science:

  • Cardiology
  • Metabolic Syndrome
  • Pathophysiology

Background:

  • Obesity is a significant risk factor for cardiometabolic and vascular diseases.
  • Cardiac visceral obesity, including epicardial adipose tissue and intramyocardial fat, contributes to various cardiac pathologies.
  • These pathologies include cardiac steatosis, hypertensive heart disease, atherosclerosis, and cardiomyopathy.

Purpose of the Study:

  • To investigate the contrasting roles of cardiac obesity and cardiac cachexia in the context of heart failure.
  • To determine which condition, excessive cardiac fat or severe fat loss, presents a greater prognostic concern.

Main Methods:

  • Review of pathophysiological mechanisms linking obesity and heart failure.
  • Analysis of metabolic and catabolic processes affecting body composition in heart failure.
  • Evaluation of changes in cardiac fat state, from accumulation to reduction (cachexia).

Main Results:

  • Cardiac obesity contributes to conditions like hypertensive heart disease, atherosclerosis, and cardiomyopathy.
  • Progressive heart failure can lead to altered body composition, including cardiac cachexia.
  • The clinical expression of these cardiac changes is unique to each patient.

Conclusions:

  • Both cardiac obesity and cardiac cachexia represent significant concerns in heart failure.
  • Cardiac cachexia, associated with progressive metabolic dysfunction, may indicate a worse prognosis.
  • Further research is needed to definitively compare the feared outcomes of cardiac obesity versus cachexia.