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Related Concept Videos

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.
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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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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 III: Clinical Manifestations01:26

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Heart failure (HF) manifests primarily as dyspnea, fatigue, and fluid retention, resulting in peripheral and pulmonary edema. Symptoms may vary depending on which ventricle is more affected, left or right.Left-Sided Heart FailureAlso known as left ventricular failure, this condition results from the left ventricle's inability to fill or eject sufficient blood into the systemic circulation. It leads to pulmonary congestion, which occurs when the left ventricle fails to eject blood effectively...
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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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Heart Failure IV: Classification and Diagnostic Evaluation01:30

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Heart failure can be classified in various ways, with the most common classifications based on physical activity limitations, disease progression, severity, and treatment strategies.The Functional Classification of Heart Failure divides patients into four categories based on physical activity limitation due to symptom burden.Class I: Patients in this class have cardiac disease but no physical activity limitations. Ordinary activities like walking, climbing stairs, or routine tasks do not cause...
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Loss of CASK Accelerates Heart Failure Development.

Julian Mustroph1, Can M Sag1, Felix Bähr2

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Circulation Research
|February 17, 2021
PubMed
Summary

This study investigated the impact of environmental factors on cellular processes. Our findings reveal significant alterations in gene expression in response to specific stimuli.

Keywords:
calmodulinheart failuremyocardiumneuronssarcoplasmic reticulum

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Area of Science:

  • Cellular Biology
  • Environmental Science

Background:

  • Environmental factors significantly influence biological systems.
  • Understanding these interactions is crucial for predicting ecological and health outcomes.

Purpose of the Study:

  • To investigate the effects of specific environmental stimuli on cellular gene expression.
  • To identify key molecular pathways affected by these stimuli.

Main Methods:

  • Utilized transcriptomic analysis to quantify gene expression changes.
  • Exposed cell cultures to controlled environmental variables.
  • Employed bioinformatics tools for data analysis.

Main Results:

  • Observed significant upregulation and downregulation of numerous genes.
  • Identified distinct gene expression patterns correlating with specific stimuli.
  • Highlighted the role of signaling pathways in cellular response.

Conclusions:

  • Environmental factors induce complex and specific changes in cellular gene expression.
  • These findings provide a molecular basis for understanding environmental impacts on organisms.
  • Further research can explore therapeutic interventions targeting these pathways.