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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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Imbalances in Cardiac Output01:26

Imbalances in Cardiac Output

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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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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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Cardiomyopathy IV: Restrictive Cardiomyopathy01:29

Cardiomyopathy IV: Restrictive Cardiomyopathy

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Restrictive cardiomyopathy (RCM) is a rare heart muscle disease characterized by impaired ventricular filling due to stiffened ventricular walls, leading to significant diastolic dysfunction.EtiologyRestrictive cardiomyopathy can arise from both inherited and acquired diseases, many of which are systemic. It is categorized into four main types: infiltrative, storage, non-infiltrative, and endomyocardial diseases.Infiltrative diseases, such as amyloidosis, lead to RCM by depositing amyloid...
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Endocardial Endothelial Dysfunction and Unknown Polymorphic Composite Accumulation in Heart Failure.

Hsuan-Fu Kuo1,2,3,4, I-Fan Liu5,6, Chia-Yang Li1

  • 1Graduate Institute of Medicine, College of Medicine, Kaohsiung Medical University, Kaohsiung 807, Taiwan.

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Summary
This summary is machine-generated.

Unknown composite deposits in the heart

Keywords:
dilated cardiomyopathyendothelial endocardiumheart failureischemic cardiomyopathymineral depositionunknown polymorphic composite

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Area of Science:

  • Cardiovascular Biology
  • Pathology
  • Biomaterials Science

Background:

  • Endocardial endothelium (EE) damage is linked to heart failure (HF).
  • The composition and role of unknown polymorphic composites in HF progression are unclear.

Purpose of the Study:

  • To investigate the deposition of unknown polymorphic composites during endocardial damage and HF progression.
  • To analyze the elemental composition of these deposits in animal models and human heart tissues.

Main Methods:

  • Induction of HF in rats using angiotensin II and left anterior descending artery ligation.
  • Collection and analysis of heart tissues from non-HF patients, and those with dilated cardiomyopathy (DCM) and ischemic cardiomyopathy (ICM).
  • Examination of EE damage, composite accumulation, and elemental composition using various analytical techniques.

Main Results:

  • HF progression led to reduced CD31 expression, impaired endocardial integrity, and exposed myofibrils/mitochondria.
  • Accumulation of unknown polymorphic composites was observed on damaged endocardial surfaces.
  • Specific elemental compositions (O, Na, N, C, S) varied in deposits between animal HF models and human HF types (DCM, ICM) compared to controls.

Conclusions:

  • Heart failure causes widespread EE dysfunction and endothelial-mesenchymal transition (EndMT).
  • Polymorphic composites with diverse elemental compositions accumulate during HF, exacerbating cardiac damage and dysfunction.
  • Understanding these composite deposits is crucial for developing targeted therapies for heart failure.