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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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Dysrhythmias VI: Management of Dysrhythmias01:25

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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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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 II: Dilated Cardiomyopathy01:30

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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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Cardiomyopathy III: Hypertrophic Cardiomyopathy01:29

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Hypertrophic cardiomyopathy, or HCM, is an autosomal dominant genetic disorder characterized by asymmetric left ventricular hypertrophy without ventricular dilation. It is more common in men and is typically diagnosed in young, athletic adults.EtiologyHCM is primarily genetic and is caused by mutations in genes encoding sarcomeric proteins. Researchers have identified over 1400 mutations across at least 11 different genes. Among these, the most frequently occurring mutations are found in the...
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Pharmacologic intervention is crucial in treating cardiac arrest patients during ACLS or Advanced Cardiovascular Life Support. The ACLS algorithms guide the administration of specific drugs based on the patient's cardiac arrest rhythm, which includes pulseless ventricular tachycardia (VT), ventricular fibrillation (VF), asystole, and pulseless electrical activity (PEA).EpinephrineIndication: Epinephrine is the first-line drug for all cardiac arrest rhythms.Mechanism of Action: Epinephrine...
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Related Experiment Video

Updated: May 5, 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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Alternative techniques for left ventricular pacing in cardiac resynchronization therapy.

Attila Mihalcz1, Imre Kassai, Laszlo Geller

  • 1Landesklinikum Krems, Krems, Austria.

Pacing and Clinical Electrophysiology : PACE
|December 10, 2013
PubMed
Summary

Cardiac resynchronization therapy (CRT) requires left ventricular (LV) lead placement, often via the coronary sinus (CS). When CS lead insertion fails, alternative surgical and endocardial techniques are explored for improved CRT outcomes.

Keywords:
cardiac resynchronizationendocardialepicardialpacing

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Area of Science:

  • Cardiology
  • Medical Devices
  • Heart Failure Management

Background:

  • Cardiac resynchronization therapy (CRT) is crucial for specific heart failure patients.
  • Coronary sinus (CS) lead placement, the primary method, has a 5-10% failure rate.
  • Increasing CRT use necessitates effective left ventricular (LV) lead revision strategies.

Purpose of the Study:

  • To review alternative techniques for LV lead placement in CRT.
  • To evaluate current and emerging methods beyond standard CS lead implantation.
  • To identify future research needs for LV lead placement optimization.

Main Methods:

  • Review of current clinical practices for CRT lead placement.
  • Analysis of alternative approaches including surgical (minithoracotomy, video-assisted thoracoscopy) and endocardial (transseptal, transapical) techniques.
  • Discussion of limitations and future directions for LV lead implantation.

Main Results:

  • Surgical access (minithoracotomy, thoracoscopy) is a common second-line option for CRT lead placement.
  • Transseptal and transapical endocardial LV lead implantations are emerging but lack extensive follow-up data.
  • These novel techniques are currently indicated for patients unsuitable for conventional or surgical CRT implantation.

Conclusions:

  • Alternative LV lead placement techniques are vital due to CS lead implantation failures.
  • Surgical and developing endocardial methods offer solutions for challenging CRT cases.
  • Randomized trials are essential to validate the efficacy of new LV lead placement technologies.