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Related Concept Videos

Dysrhythmias I: Introduction01:15

Dysrhythmias I: Introduction

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Dysrhythmias refers to abnormalities in the heart's rhythm. They result from disruptions in the heart's electrical conduction system, which includes the sinoatrial(SA)node, atrioventricular(AV) node, the bundle of His, bundle branches, and Purkinje fibers.Definition and PathophysiologyDysrhythmias result from disorders of impulse formation, impulse conduction, or both. The heart contains specialized cells in the sinoatrial node, atrioventricular node, and the bundle of His and Purkinje fibers...
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Dysrhythmias IV: Characteristics of Bradyarrhythmias01:18

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Bradyarrhythmias are cardiac rhythm disorders characterized by a slower-than-normal heart rate, typically defined as fewer than 60 beats per minute. Some of which are discussed here:Sinus BradycardiaSinus bradycardia presents a heart rate lower than 60 beats per minute, with a regular rhythm originating from the SA node. The ECG typically shows normal P waves preceding each QRS complex, a normal PR interval (0.12 to 0.20 seconds), and a normal QRS duration (0.06 to 0.10 seconds).First-Degree AV...
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Dysrhythmias II: Classification of Tachyarrhythmias01:28

Dysrhythmias II: Classification of Tachyarrhythmias

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Tachyarrhythmias are a type of dysrhythmia where the heart rate exceeds 100 beats per minute. Here are some common types of tachyarrhythmias:Sinus TachycardiaSinus tachycardia originates from increased impulses from the sinus node, leading to an elevated heart rate. It is often triggered by stress, fever, or exercise.Patients may experience palpitations, a sensation of a racing heart, dizziness, and chest discomfort.Causes and Risk Factors: Common causes include physical exertion, emotional...
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Disturbances in Heart Rhythm01:29

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Arrhythmia or dysrhythmia refers to an abnormal heart rhythm caused by a defect in the heart's conduction system. It can cause the heart to beat irregularly, too quickly, or too slowly, leading to symptoms like chest pain, shortness of breath, and fainting. Factors such as stress, caffeine, alcohol, nicotine, cocaine, certain drugs, congenital defects, diseases, and electrolyte abnormalities can trigger arrhythmias.
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Dysrhythmias V: Evaluating Dysrhythmias01:30

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Dysrhythmias, also known as arrhythmias, are disturbances in the heart's rhythm that range from benign to life-threatening. A thorough evaluation is crucial for appropriate management and involves a comprehensive medical history, physical examination, and various diagnostic tests.Medical HistorySymptoms: Collect detailed information on palpitations, dizziness, syncope, chest pain, and fatigue. Note their onset, frequency, and triggers.Previous Cardiac Issues: Document any history of heart...
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Dysrhythmias III: Characteristics of Dysrhythmias01:29

Dysrhythmias III: Characteristics of Dysrhythmias

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Dysrhythmias, also known as arrhythmias, are irregular heart rhythms that result from abnormal electrical activity in the heart, affecting its ability to circulate blood efficiently. Tachyarrhythmias, a subset of dysrhythmias, are characterized by abnormally fast heart rates exceeding 100 beats per minute. Here are some types of tachyarrhythmias with their distinct ECG features:Sinus Tachycardia:Sinus tachycardia presents a regular heart rhythm with an increased rate of 101-180 beats per...
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Left intraventricular dyssynchrony caused by a false tendon.

Tadanobu Irie1, Koji Kurosawa1, Yoshiaki Kaneko1

  • 1Department of Medicine and Biological Science, Gunma University Graduate School of Medicine, 3-39-22 Showa-machi, Maebashi, Gunma 371-8511, Japan.

Journal of Arrhythmia
|September 4, 2015
PubMed
Summary

Left ventricular false tendons can cause heart problems. In this case, a stiff false tendon worsened non-ischemic cardiomyopathy by causing dyssynchrony in the left ventricle.

Keywords:
Cardiac resynchronization therapyFalse tendonIntraventricular dyssynchrony

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Area of Science:

  • Cardiology
  • Cardiac Anatomy

Background:

  • Left ventricular (LV) false tendons are common intraventricular structures.
  • These tendons can lead to LV cavity deformation and functional issues.
  • Non-ischemic cardiomyopathy presents challenges in understanding its mechanical complications.

Purpose of the Study:

  • To describe a case of non-ischemic cardiomyopathy.
  • To investigate the role of a left ventricular false tendon in causing intraventricular dyssynchrony.
  • To explore the interaction between a false tendon and left bundle branch block.

Main Methods:

  • Case report presentation.
  • Review of relevant cardiac anatomy and physiology.
  • Analysis of mechanical interactions within the left ventricle during systole.

Main Results:

  • A stiff left ventricular false tendon exerted mechanical pressure on the mid-septum.
  • This pressure contributed to intraventricular dyssynchrony.
  • The dyssynchrony was associated with complete left bundle branch block in the context of non-ischemic cardiomyopathy.

Conclusions:

  • Left ventricular false tendons can be implicated in cardiac mechanical complications beyond their typical benign presentation.
  • False tendons may exacerbate conditions like non-ischemic cardiomyopathy by inducing or worsening intraventricular dyssynchrony.
  • Understanding these mechanical interactions is crucial for managing complex cardiac conditions.