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The normal cardiac rhythm is a synchronized electrical activity that facilitates the regular and coordinated contraction of the heart muscle. This process is essential for efficient blood circulation throughout the body. The fundamental elements involved in establishing and maintaining this rhythm include the unique electrical properties of cardiac muscle cells, the sinoatrial (SA) node's pacemaker function, the specialized conducting system, and the ionic mechanisms underlying each phase...
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IntroductionA range of clinical features characterizes Mitral Valve Prolapse (MVP), but it is important to note that many individuals with MVP are asymptomatic and may remain so throughout their lives. For those who do exhibit symptoms, the following are the key clinical features:Palpitations: This is a common symptom where individuals feel an irregular or rapid heartbeat. Palpitations in MVP are often due to arrhythmias such as premature ventricular contractions or supraventricular...
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Mitral Stenosis I: Introduction01:22

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Mitral Valve Stenosis (MVS) is a heart condition where the mitral valve narrows, impeding blood circulation from the left atrium to the left ventricle. The etiology and pathophysiology of this condition are multifaceted, leading to a cascade of cardiovascular complications.Causes of Mitral Valve StenosisRheumatic Heart Disease: It is the main cause of mitral valve stenosis, particularly in developing nations. This condition arises from rheumatic fever, an inflammatory illness resulting from...
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Ventricular pacing - Electromechanical consequences and valvular function.

Elisa Ebrille1, Christopher V DeSimone2, Vaibhav R Vaidya2

  • 1Division of Cardiovascular Diseases, Mayo Clinic, Rochester, MN, USA; Division of Cardiology, Department of Medical Sciences, Città della Salute e della Scienza, University of Turin, Turin, Italy.

Indian Pacing and Electrophysiology Journal
|August 4, 2016
PubMed
Summary
This summary is machine-generated.

Ventricular pacing can cause harmful heart dyssynchrony. Optimizing lead placement and exploring new pacing methods may improve outcomes and mitigate negative effects, particularly on mitral valve function.

Keywords:
Atrioventricular septumBiventricular pacingDyssynchronyResynchronizationRight ventricular pacingValvular regurgitation

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Area of Science:

  • Cardiology
  • Biomedical Engineering

Background:

  • Ventricular pacing can induce cardiac dyssynchrony, potentially leading to adverse effects.
  • Current understanding of pacing-induced dyssynchrony mechanisms and mitigation strategies remains incomplete.

Purpose of the Study:

  • To review the literature on ventricular pacing-induced dyssynchrony.
  • To explore the impact of pacing location, novel pacing methods, and diagnostic tools on dyssynchrony.
  • To examine the relationship between pacing, dyssynchrony, and valvular function, especially the mitral valve.

Main Methods:

  • Literature review of existing studies on ventricular pacing and cardiac dyssynchrony.
  • Analysis of mechanisms, pacing locations, novel techniques (atrioventricular septal, lead-less, far-field surface stimulation), and diagnostic utilities (ECG, echocardiography).
  • Focus on the impact on valvular function, particularly the mitral valve, in the context of cardiac resynchronization therapy (CRT).

Main Results:

  • Ventricular pacing can induce dyssynchrony through various mechanisms.
  • Pacing lead location and novel pacing strategies may influence the development and severity of dyssynchrony.
  • Dyssynchrony significantly impacts cardiac function, with notable effects on mitral valve performance.

Conclusions:

  • Further research is needed to elucidate the mechanisms of pacing-induced dyssynchrony.
  • Optimizing pacing lead placement and exploring innovative pacing modalities are crucial for improving CRT efficacy.
  • Understanding the interplay between pacing, dyssynchrony, and mitral valve function is key to enhancing patient outcomes.