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Conduction Disorder of the Heart


Presentation

  • Clinical Presentation - Palpitations - Dizzyness - Chest discomfort ECG - Narrow QRS with a rate between 150-250 and the p waves usually get lost in the fast QRS - P wave may be abnormal but are usually buried in the QRS complex Treatment Vagal nerve[physicianassistantexamreview.com]
  • Treatment depends on the severity of the block, and whether or not symptoms are present. Any underlying cause of the heart block should be treated if possible. Ventricular pacing is the treatment of choice. Various options are available.[myvmc.com]
  • Presentation The presentation of arrhythmias varies depending on the type of arrhythmia, but even within the same arrhythmia there can be significant variation in presenting symptoms.[pedsinreview.aappublications.org]
  • A sizable chunk of the presently ongoing work is funded by one organization, the SENS Research Foundation, and supported entirely by philanthropic donations.[fightaging.org]
  • Congenital complete heart block may not present itself until the child is a few years old. The mean age of patients with complete heart block at presentation to The Hospital for Sick Children, Toronto, was 4.9 years 9.[jpma.org.pk]
Congestive Heart Failure
  • Bradycardia is usually related to fetal distress; supraventricular tachycardia, atrial flutter, and atrial fibrillation may be associated with severe congestive heart failure.[ncbi.nlm.nih.gov]
  • A person with acute congestive heart failure and atrial fibrillation can be very hard to treat, because he or she has lost the 20 percent “atrial kick” to the left ventricle.[dummies.com]
  • heart failure –1 point Hypertension –1 point Age 75–1 point Diabetes Mellitus – 1 point Stroke history – 2 points 2 or more points – Heparin to Coumadin bridge INR goal: 2 - 3 1 point – Aspirin or Coumadin 0 points – No therapy or Aspirin Atrial Flutter[smartypance.com]
  • Heart failure edema is called congestive heart failure (CHF), traditionally treated with diuretics (drugs that increase the excretion of water from the body).[froedtert.com]
Death in Infancy
  • […] in Infancy Focus on Prolonged Repolarization 924 Sudden Cardiac Death in Kidney Diseases 934 Index 943 حقوق النشر[books.google.com]
Heart Disease
  • Bundle Branch Block Left bundle branch block and right bundle branch block of recent onset, indicate the need for a cardiovascular examination to rule out heart disease, especially ischemic heart disease.[ucalgary.ca]
  • Exclusion criteria: Presence of cardiac: Ischemic heart disease or congenital or acquired structural heart disease (hypertrophic cardiomyopathy, idiopathic dilated cardiomyopathy, valve disease with clinical significance).[clinicaltrials.gov]
  • Catecholaminergic polymorphic ventricular tachycardia is an inherited disease and occurs in the absence of structural heart disease or known associated syndromes.[ncbi.nlm.nih.gov]
  • Fetal dysrhythmias may be associated with congenital heart disease and fetal hydrops.[ncbi.nlm.nih.gov]
Dysautonomia
  • Systemic diseases like juvenile rheumatoid arthritis and other collagen disorders and familial dysautonomia infrequently have associated conduction abnormalities 6-9.[jpma.org.pk]
Irritability
  • The QRS morphology is very similar to the sinus complexes Premature junctional complex (PJC) occurs when an irritable site within the AV node fires an impulse before the SA node.[smartypance.com]

Workup

Incomplete Right Bundle Branch Block
  • Robert Roberts Liu and colleagues have identified three families (one of Lebanese and two of French origin) with isolated conduction defects consisting primarily of complete or incomplete right bundle branch block.[healio.com]
T Wave Alternans
  • Wave Alternans Mechanisms and Implications for Prediction of Sudden Cardiac Death 394 Invasive Electrophysiologic Testing Role in Sudden Death Prediction 409 Provocative Testing in Inherited Arrhythmias 424 Novel Predictors of Sudden Cardiac Death 434[books.google.com]
Inverted P Wave
  • p wave Sick sinus syndrome Brady-tachy: Arrhythmia in which bradycardia alternates with tachycardia Sinus arrest: prolonged absence of sinus node activity (absent P waves) 3 seconds Sinus arrhythmia Normal, minimal variations in the SA Node's pacing[smartypance.com]
Absent A-Waves
  • ECG Features: A widened QRS complex A secondary R wave in Absent Q waves in anatomy abdominal aorta geeky medics - 28 images - anatomy abdominal aorta geeky medics, anatomy abdominal aorta geeky medics, abdominal aorta diagram picture of abdominal aorta[pinterest.co.uk]
  • P waves) 3 seconds Sinus arrhythmia Normal, minimal variations in the SA Node's pacing rate in association with the phases of respiration .[smartypance.com]

Treatment

  • Treatment depends on the severity of the block, and whether or not symptoms are present. Any underlying cause of the heart block should be treated if possible. Ventricular pacing is the treatment of choice. Various options are available.[myvmc.com]
  • Treatment usually isn’t needed for bundle branch block, but treatments may be recommended underlying health conditions like high blood pressure or heart disease that caused it.[heartconnect.com]
  • Modalities 729 Treatment Modalities 731 Clinical Role of Antiarrhythmic Drugs in the Prevention of Sudden Death 733 Nonantiarrhythmic Drugs in Sudden Death Prevention 760 The Implantable Cardioverter Defibrillator Technical and Clinical Considerations[books.google.com]
  • EKG: Wide complex tachycardia Treatment: Stable- amiodarone, lidocaine Unstable- CPR and defibrillation Ventricular Tachycardia Polymorphic Polymorphic ventricular tachycardia has QRS complexes that vary in shape and size.[smartypance.com]
  • Treatment Often, no treatment is required for bundle branch block. But it’s still important to have regular checkups. Your doctor will want to monitor your condition to make sure that no other changes occur.[heart.org]

Prognosis

  • Nonspecific intraventricular conduction delay: Definitions, prognosis, and implications for cardiac resynchronization therapy.[ecgwaves.com]
  • The electrophysiologic mechanisms for these changes are important with respect to prognosis and treatment.[britannica.com]

Etiology

  • Certain conditions have both an underlying etiology and multiple body system manifestations due to the underlying etiology.[icd10coded.com]
  • Introduction Rhythm disorders in pediatric patients encompass a vast and diverse group of problems that vary greatly not only in etiology but also in presentation.[pedsinreview.aappublications.org]
  • Heart rate frequently increases with inspiration and decreases with expiration Torsades de pointes Torsade de Pointes is a special form of ventricular tachycardia EKG: Polymorphic ventricular tachycardia that appears to be twisting around a baseline Etiology[smartypance.com]
  • Clinically, bundle branch blocks are a delay in the conduction pathway and they can be helpful in determining the underlying etiology to a patients’ presenting complaint.[cdemcurriculum.com]
  • The etiology of congestive heart failure affects both preventative and therapeutic approaches, which are discussed later under Therapy.[britannica.com]

Pathophysiology

  • Early physiologic data established the distinctive cellular electrical properties of these tissues and enshrined the fundamentals of physiologic and pathophysiologic conduction. 1 Clinical cases where conduction disease was the predominant presenting[heart.bmj.com]
  • The most common pathophysiologic mechanism for abnormal conduction results from localized or regional depolarization due to hypoxia caused by impaired coronary blood flow.[cvphysiology.com]
  • As a result of this pathophysiology, the conduction time through the ventricles is prolonged, resulting in widening of the QRS complex (greater than 120 msec).[cdemcurriculum.com]
  • These functional defects are called “primary electrical disease of the heart.” 3 , 4 , 5 , 6 The pathophysiological mechanisms underlying CCD are diverse, but the most frequent form of CCD is a degenerative form also called Lenegre-Lev disease 7 , 8 ([link.springer.com]

Prevention

  • […] of Sudden Death 733 Nonantiarrhythmic Drugs in Sudden Death Prevention 760 The Implantable Cardioverter Defibrillator Technical and Clinical Considerations 772 Beyond Sudden Death Prevention Minimizing Implantable Cardioverter Defibrillator Shocks and[books.google.com]
  • […] wolff-parkinson-white syndrome. aerial conduction, air conduction conduction of sound waves to the organ of hearing through the air. conduction anesthesia local anesthesia produced by the injection of an anesthetic agent close to a nerve in order to prevent[medical-dictionary.thefreedictionary.com]
  • This may not prevent tachycardias from occurring so you may also need to take anti-arrhythmic drugs. Some people may need to have an ICD fitted instead of a pacemaker. Medication alone does not help.[c-r-y.org.uk]
  • In addition to lifestyle changes, multiple blood pressure medications called anti-hypertensive agents can be used to treat the disease and prevent progression and complications.[everydayhealth.com]
  • […] work in surface electrocardiography and intracardiac recording documented the electrophysiologic correlates of proximal conduction-system pathology, but the absence of a readily defined anatomical substrate for more distal conduction abnormalities has prevented[heart.bmj.com]

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