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Heart Failure I: Introduction

Heart Failure I: Introduction

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...

Heart Failure III: Clinical Manifestations

Heart Failure III: Clinical Manifestations

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...

Heart Failure IV: Classification and Diagnostic Evaluation

Heart Failure IV: Classification and Diagnostic Evaluation

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...

Pathophysiology of Heart Failure

Pathophysiology of Heart Failure

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...

Heart Failure VII: Nursing Interventions

Heart Failure VII: Nursing Interventions

The first step in nursing management of a patient with heart failure involves thoroughly assessing the patient's medical history.Subjective Data: Obtain the patient's medical history of coronary artery disease, hypertension, myocardial infarction, and symptoms like dyspnea, orthopnea, and paroxysmal nocturnal dyspnea.Objective Data: Conduct a physical examination to identify findings such as jugular vein distention, pulmonary crackles, tachycardia, murmurs, peripheral edema, and vital signs,...

Heart Failure II: Pathophysiology

Heart Failure II: Pathophysiology

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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Updated: Jun 20, 2026

A Surgical Model of Heart Failure with Preserved Ejection Fraction in Tibetan Minipigs

A Surgical Model of Heart Failure with Preserved Ejection Fraction in Tibetan Minipigs

Published on: February 18, 2022

[Heart failure].

Ryujiro Sasanabe¹, Toshiaki Shiomi

¹Sleep Disorders Center, Aichi Medical University Hospital.

Nihon Rinsho. Japanese Journal of Clinical Medicine

|September 23, 2009

Summary

Heart failure patients often experience insomnia due to sleep-disordered breathing (SDB) like obstructive sleep apnea (OSA), central sleep apnea (CSA), and Cheyne-Stokes respiration (CSR). Understanding these sleep disorders is crucial for better patient care.

Area of Science:

Cardiology
Sleep Medicine
Pulmonology

Context:

Heart failure (HF) patients frequently suffer from insomnia.
Symptoms like dyspnea and orthopnea contribute to sleep disturbances in HF.
Medications for cardiovascular conditions can also precipitate sleep disorders.

Purpose:

To explore the complex relationship between insomnia and sleep-disordered breathing (SDB) in heart failure patients.
To highlight the common co-occurrence of obstructive sleep apnea (OSA), central sleep apnea (CSA), and Cheyne-Stokes respiration (CSR) in HF.
To emphasize the diagnostic challenges sleep disorders pose in HF management.

Summary:

Insomnia in heart failure is multifactorial, involving respiratory symptoms and conditions like OSA, CSA, and CSR.

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A Surgical Model of Heart Failure with Preserved Ejection Fraction in Tibetan Minipigs

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Sleep fragmentation and difficulty maintaining sleep are prevalent in HF patients with SDB.

Medication side effects, including beta-blockers and statins, can exacerbate sleep issues.

Impact:

Improved understanding of insomnia and SDB in HF can enhance differential diagnosis.
Addressing sleep disorders may lead to better management and quality of life for HF patients.
Increased physician knowledge on insomnia and SDB in HF can elevate medical care standards.