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Related Concept Videos

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...
Pulse rhythm01:30

Pulse rhythm

Pulse rhythm refers to the pattern of pulsations within specific intervals, offering valuable insights into the regularity or irregularity of the heart's beats as observed through the pattern of pulsation within specific intervals. A regular pulse exhibits a consistent heart rate with uniform waveforms and pulsation force, variations of which can be classified as normal, weak, or bounding.
Conversely, an irregular pulse pattern is termed dysrhythmia, stemming from disruptions in cardiac muscle...
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,...
Cardiopulmonary Resuscitation IV: Pharmacological Management01:25

Cardiopulmonary Resuscitation IV: Pharmacological Management

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...
Cardiomyopathy IV: Restrictive Cardiomyopathy01:29

Cardiomyopathy IV: Restrictive Cardiomyopathy

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...
Cardiac Action Potential01:30

Cardiac Action Potential

Cardiac action potentials are essential for proper heart function, enabling the rhythmic contractions needed for adequate blood circulation. Nodal cells and Purkinje fibers, specialized for electrical conduction, generate these action potentials.
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Ionic Basis of Cardiac Action Potentials

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Benefits of Cardiac Resynchronization Therapy in an Asynchronous Heart Failure Model Induced by Left Bundle Branch Ablation and Rapid Pacing
12:45

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

Published on: December 11, 2017

Current status of cardiac resynchronization therapy.

Ole A Breithardt1, Christoph Stellbrink

  • 1Department of Cardiology, University Hospital Aachen, D-52057 Aachen, Germany. olebreithardt@gmx.de

Current Opinion in Anaesthesiology
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Cardiac resynchronization therapy (CRT) improves heart failure outcomes in patients with left bundle branch block. Identifying responders remains crucial, as about a third do not benefit from this treatment.

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Area of Science:

  • Cardiology
  • Medical Devices
  • Heart Failure Management

Background:

  • Cardiac resynchronization therapy (CRT) using biventricular pacing is a key treatment for moderate-to-advanced heart failure with left bundle branch block.
  • Understanding the pathophysiology and clinical effects of CRT is essential for optimizing patient selection and outcomes.

Purpose of the Study:

  • To review new findings on the pathophysiology of CRT.
  • To examine the clinical effects of CRT in heart failure patients with left bundle branch block.

Main Methods:

  • Review of several randomized trials evaluating CRT.
  • Assessment of CRT effects on cardiac hemodynamics and clinical parameters.
  • Evaluation of mechanical synchrony using echocardiography and radionuclide angiography.

Main Results:

  • CRT improves hemodynamics, reduces energy cost, and ameliorates functional mitral regurgitation.
  • Benefits include improved quality of life, exercise capacity, and reduced hospitalizations.
  • Preliminary data suggest a positive impact on cardiac mortality, but approximately one-third of patients do not respond.

Conclusions:

  • CRT offers confirmed benefits in selected heart failure patients.
  • Successful ventricular resynchronization is critical for both acute and long-term improvements.
  • Further research is needed to enhance non-invasive identification of mechanical dyssynchrony for optimal patient selection.