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Related Concept Videos

Heart Failure VI: Adjunct Therapies01:22

Heart Failure VI: Adjunct Therapies

Additional therapies for treating patients with heart failure (HF) may include procedural interventions, supplemental oxygen, the management of sleep disorders, and nutritional therapy.Procedural InterventionsImplantable Cardioverter-Defibrillator: For patients at risk of life-threatening arrhythmias due to severe left ventricular dysfunction, an Implantable Cardioverter-Defibrillator (ICD) can detect and terminate these arrhythmias, preventing sudden cardiac death and improving survival rates.
Heart Failure V: Medical Management01:30

Heart Failure V: Medical Management

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...
Heart Failure IV: Classification and Diagnostic Evaluation01:30

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...
Cardiomyopathy V: Interprofessional Care01:29

Cardiomyopathy V: Interprofessional Care

Managing cardiomyopathy involves addressing underlying or precipitating causes, treating heart failure with medications, and implementing dietary changes and a balanced exercise and rest regimen.Lifestyle ModificationsCardiomyopathy patients should adopt a low-sodium diet to reduce fluid retention and manage heart failure. A personalized exercise and rest plan helps maintain physical fitness without overstraining the heart. Avoiding alcohol and tobacco is essential to prevent further damage to...
Cardiomyopathy II: Dilated Cardiomyopathy01:30

Cardiomyopathy II: Dilated Cardiomyopathy

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,...
Mitral Regurgitation IV: Nursing Management01:28

Mitral Regurgitation IV: Nursing Management

Mitral regurgitation (MR) is a condition where the mitral valve does not close properly, leading to the backward flow of blood from the left ventricle into the left atrium during systole. This condition can arise from various causes, including rheumatic fever, infective endocarditis, or degenerative valve disease. Effective nursing management is crucial to optimizing patient outcomes and involves comprehensive assessment and targeted interventions.Comprehensive Patient AssessmentA detailed...

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Related Experiment Video

Updated: May 26, 2026

Lumped-Parameter and Finite Element Modeling of Heart Failure with Preserved Ejection Fraction
09:20

Lumped-Parameter and Finite Element Modeling of Heart Failure with Preserved Ejection Fraction

Published on: February 13, 2021

Electrical devices for left ventricular dysfunction and heart failure: do we need revised guidelines?

Maya Guglin1, S Serge Barold

  • 1Department of Cardiology, University of South Florida, 2 Tampa General Circle, Suite 5074, Tampa, FL 33618, USA. mguglin@gmail.com

Journal of Interventional Cardiac Electrophysiology : an International Journal of Arrhythmias and Pacing
|December 17, 2011
PubMed
Summary
This summary is machine-generated.

Cardiac resynchronization therapy (CRT) benefits asymptomatic and minimally symptomatic heart failure (HF) patients, improving survival and reducing hospitalizations, especially those with QRS ≥ 150 ms.

Related Experiment Videos

Last Updated: May 26, 2026

Lumped-Parameter and Finite Element Modeling of Heart Failure with Preserved Ejection Fraction
09:20

Lumped-Parameter and Finite Element Modeling of Heart Failure with Preserved Ejection Fraction

Published on: February 13, 2021

Area of Science:

  • Cardiology
  • Medical Devices
  • Heart Failure Management

Background:

  • Recent trials show cardiac resynchronization therapy (CRT) benefits New York Heart Association (NYHA) class II heart failure (HF) patients.
  • CRT also benefits NYHA class I (asymptomatic) patients, particularly those with ischemic cardiomyopathy.

Purpose of the Study:

  • To evaluate the benefits of early intervention with CRT in asymptomatic or minimally symptomatic patients.
  • To determine optimal patient selection for CRT, focusing on QRS duration and left ventricular ejection fraction.
  • To discuss the role of CRT and implantable cardioverter-defibrillators (ICDs) in various HF patient populations.

Main Methods:

  • Analysis of data from three recent clinical trials on CRT efficacy.
  • Comparison of CRT benefits across different NYHA classes and QRS durations.
  • Review of evidence for lone ICDs versus CRT in cardiomyopathy management.

Main Results:

  • Early CRT intervention in asymptomatic/minimally symptomatic patients improves survival and reduces HF hospitalizations.
  • CRT benefit is most pronounced in patients with QRS duration ≥ 150 ms.
  • CRT demonstrates greater left ventricular reverse remodeling in nonischemic cardiomyopathy compared to ischemic.

Conclusions:

  • Consider CRT-D for NYHA class I patients with QRS ≥ 150 ms and LVEF ≤ 30%, regardless of etiology.
  • Cardiomyopathy should be the primary target for device therapy (CRT or ICD) irrespective of symptoms.
  • Guidelines are needed for CRT in advanced HF (NYHA class IV) and heart transplant candidates, balancing benefits against lifelong device risks.