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Related Concept Videos

Heart Failure VI: Adjunct Therapies01:22

Heart Failure VI: Adjunct Therapies

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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.
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Cardiomyopathy II: Dilated Cardiomyopathy01:30

Cardiomyopathy II: Dilated Cardiomyopathy

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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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Cardiopulmonary Resuscitation III: AED Use01:23

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Introduction to AEDAn Automated External Defibrillator (AED) is a portable medical device that analyzes the heart's rhythm and, if necessary, delivers an electrical shock to help the heart re-establish an effective rhythm during sudden cardiac arrest (SCA). SCA occurs when the heart suddenly and unexpectedly stops beating, leading to a loss of blood flow to the brain and other vital organs. In such emergencies, time is of the essence, and using an AED, combined with Cardiopulmonary...
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Cardiomyopathy V: Interprofessional Care01:29

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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...
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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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Dysrhythmias VI: Management of Dysrhythmias01:25

Dysrhythmias VI: Management of Dysrhythmias

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Dysrhythmia management involves a multifaceted approach, incorporating pharmacological treatments, medical procedures, surgical interventions, lifestyle modifications, and patient education.Pharmacological ManagementAntiarrhythmic Drugs:Class I (Sodium Channel Blockers): This class includes quinidine and procainamide, which reduce the speed of impulse conduction in the heart, stabilize the cardiac membrane, and control arrhythmias. Quinidine and procainamide are Class IA agents that prolong the...
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Related Experiment Video

Updated: Mar 26, 2026

Benefits of Cardiac Resynchronization Therapy in an Asynchronous Heart Failure Model Induced by Left Bundle Branch Ablation and Rapid Pacing
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Developments in Cardiac Resynchronisation Therapy.

Geoffrey F Lewis1, Michael R Gold1

  • 1Division of Cardiology, Medical University of South Carolina, Charleston, South Carolina, US.

Arrhythmia & Electrophysiology Review
|February 3, 2016
PubMed
Summary
This summary is machine-generated.

Cardiac resynchronisation therapy (CRT) improves outcomes for heart failure patients with reduced ejection fraction and conduction delays. Maximizing CRT response involves refining patient selection, optimizing lead placement, and adopting new delivery techniques.

Keywords:
Cardiac resynchronisation therapyLV lead deliveryLV reverse remodellingcardiac pacemakerdevice programmingheart failureimplantable cardioverter/defibrillatorleft bundle branch blockleft ventricular function

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Area of Science:

  • Cardiology
  • Medical Devices

Background:

  • Cardiac resynchronisation therapy (CRT) is established for heart failure with reduced ejection fraction (HFrEF) and interventricular conduction delay.
  • Large trials confirm CRT reduces heart failure hospitalizations, improves symptoms, left ventricular (LV) function, and mortality.
  • Guidelines recommend CRT for NYHA class II-IV HFrEF patients with QRS prolongation, especially left bundle branch block.

Purpose of the Study:

  • To address the challenge of maximizing patient response rates and magnitude to CRT.
  • To explore strategies for optimizing CRT effectiveness in eligible heart failure patients.

Main Methods:

  • Review of established CRT indications and current clinical challenges.
  • Discussion of emerging strategies including tailored patient selection.
  • Exploration of individualized LV lead placement techniques.
  • Consideration of novel technologies and methods for CRT delivery.

Main Results:

  • CRT is proven to significantly improve clinical outcomes in selected heart failure patients.
  • Current focus is on enhancing CRT efficacy beyond established criteria.
  • Optimizing patient selection and lead positioning are key to improving response.

Conclusions:

  • Maximizing CRT benefits requires a multi-faceted approach.
  • Tailoring patient selection and individualizing LV lead placement are critical.
  • Advancements in CRT delivery technologies hold promise for further improving patient outcomes.