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Related Concept Videos

Pathophysiology of Heart Failure01:17

Pathophysiology of Heart Failure

1.7K
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...
1.7K
Heart Failure II: Pathophysiology01:29

Heart Failure II: Pathophysiology

16
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...
16
Heart Failure I: Introduction01:27

Heart Failure I: Introduction

24
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...
24
Imbalances in Cardiac Output01:26

Imbalances in Cardiac Output

1.4K
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...
1.4K
Heart Failure V: Medical Management01:30

Heart Failure V: Medical Management

16
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...
16
Coronary Artery Disease II: Pathophysiology01:26

Coronary Artery Disease II: Pathophysiology

15
Coronary Artery Disease (CAD) originates from a series of events that impair the function of coronary arteries, the blood vessels responsible for delivering oxygen-rich blood to the heart muscle. The pathophysiology of CAD is closely linked to atherosclerosis, a chronic inflammatory and lipid-driven condition affecting the vascular endothelium.1. Endothelial DamageThe process begins with damage to the vascular endothelium, which serves as a protective barrier between the blood and the vessel...
15

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Related Experiment Video

Updated: Jul 26, 2025

Oxygenation-sensitive Cardiac MRI with Vasoactive Breathing Maneuvers for the Non-invasive Assessment of Coronary Microvascular Dysfunction
08:35

Oxygenation-sensitive Cardiac MRI with Vasoactive Breathing Maneuvers for the Non-invasive Assessment of Coronary Microvascular Dysfunction

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Coronary microvascular dysfunction in heart failure patients.

Takumi Toya1, Yuji Nagatomo1, Yukinori Ikegami1

  • 1Division of Cardiology, National Defense Medical College, Tokorozawa, Saitama, Japan.

Frontiers in Cardiovascular Medicine
|June 19, 2023
PubMed
Summary
This summary is machine-generated.

Coronary microvascular dysfunction impacts heart failure with preserved and reduced ejection fraction. Alterations in these small vessels worsen outcomes by causing myocardial ischemia.

Keywords:
coronary flow reservecoronary microvascular dysfunctioncoronary physiologyheart failure with preserved ejection fractionheart failure with reduced ejection fraction

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Area of Science:

  • Cardiology
  • Vascular Biology
  • Heart Failure Pathophysiology

Background:

  • Coronary microcirculation autoregulates blood flow to the heart muscle.
  • Dysfunction in these small vessels is common in heart failure.
  • This dysfunction can lead to heart muscle injury.

Purpose of the Study:

  • To review the role of coronary microvascular dysfunction in heart failure.
  • To explain its impact on heart failure with preserved and reduced ejection fraction.

Main Methods:

  • Literature review of current research.
  • Synthesis of findings on coronary microvascular function in heart failure.

Main Results:

  • Coronary microvascular dysfunction is a key factor in heart failure pathogenesis.
  • Both preserved and reduced ejection fraction heart failure involve microvascular alterations.

Conclusions:

  • Understanding coronary microvascular dysfunction is crucial for managing heart failure.
  • Targeting microvascular function may improve clinical outcomes in heart failure patients.