First degree AV block causes: Difference between revisions

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* [[Paliperidone]]
* [[Paliperidone]]


* Post [[aortic valve  replacement ]]
* [[aortic valve  replacement|Post aortic valve replacement ]]


* [[catheter ablation|Post catheter ablation for  arrhythmias]]
* [[catheter ablation|Post catheter ablation for  arrhythmias]]

Revision as of 23:59, 21 August 2013

First degree AV block Microchapters

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Patient Information

Overview

Historical Perspective

Pathophysiology

Classification

Causes

Differentiating First degree AV block from other Diseases

Epidemiology and Demographics

Risk Factors

Screening

Natural History, Complications and Prognosis

Diagnosis

History and Symptoms

Physical Examination

Laboratory Findings

Electrocardiogram

EKG Examples

Chest X Ray

Echocardiography

Other Imaging Findings

Other Diagnostic Studies

Treatment

Medical Therapy

Surgery

Primary Prevention

Secondary Prevention

Cost-Effectiveness of Therapy

Future or Investigational Therapies

Case Studies

Case #1

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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]; Associate Editor(s)-in-Chief: Cafer Zorkun, M.D., Ph.D. [2]; Raviteja Guddeti, M.B.B.S. [3]
Synonyms and keywords:; AV block, atrioventricular block, heart block

Overview

An atrioventricular block (or AV block) is a type of heart block involving an impairment of the conduction between the atria and ventricles of the heart.[1] It usually involves the atrioventricular node, but it can involve other structures too. AV block is categorized by degree and site of conduction block. In first-degree AV block, all atrial impulses are conducted to the ventricle, however, there is a delay within the AV node, resulting in a prolonged PR interval on ECG (>200 msec or >5 small blocks). In other words, first degree block is a slowed conduction without loss of atrioventricular synchrony.

Causes

Life Threatening Causes

Life-threatening conditions can result in death or permanent disability within 24 hours if left untreated.

Common Causes

Causes by Organ System

Cardiovascular Acute myocardial infarction, hypertension, acute rheumatic fever, dilated cardiomyopathy, hypertrophic cardiomyopathy, myocarditis, myocardial bridging, valvular heart disease, transposition of the great vessels, ASD, Ebstein's anomaly, VSD, post closure of a ventricular septal defect, tetralogy of Fallot, endocardial cushion defect, Lev's disease, hypersensitive carotid sinus syndrome, idiopathic bilateral bundle branch fibrosis, idiopathic progressive cardiac conduction disease, Lev's disease, post aortic valve replacement, post catheter ablation for arrhythmias, post mitral valve replacement
Chemical / poisoning No underlying causes
Dermatologic No underlying causes
Drug Side Effect Calcium channel blockers, beta-blockers, digitalis, donepezil, cholinesterase inhibitors, dolasetron, eslicarbazepine acetate, quinidine, procainamide, disopyramide, flecainide, propafenone, amiodarone, sotalol, dofetilide, ibutilide, magnesium, fesoterodine, fingolimod, lacosamide, paliperidone, propoxyphene, terodiline
Ear Nose Throat No underlying causes
Endocrine Hyperthyroidism, myxedema, thyrotoxic periodic paralysis
Environmental Hypothermia
Gastroenterologic Hemochromatosis
Genetic Emery-Dreifuss muscular dystrophy, fabry disease, glycogenosis type 2b, hereditary neuromuscular heredodegenerative disease, Kearns-Sayre syndrome
Hematologic Multiple myeloma
Iatrogenic aortic valve replacement, Post catheter ablation for arrhythmias, Post closure of a ventricular septal defect, post mitral valve replacement
Infectious Disease Acute rheumatic fever, Chagas disease, diphtheria, Lyme disease, myocarditis, tuberculosis, neonatal lupus syndrome, protozoal infection, sarcoidosis, SLE
Musculoskeletal / Ortho Ankylosing spondylitis, muscular dystrophy, hereditary neuromuscular heredodegenerative disease, Kearns-Sayre syndrome, Mitochondrial genome inherited conditions
Neurologic No underlying causes
Nutritional / Metabolic Fabry disease, glycogenosis type 2b
Obstetric/Gynecologic No underlying causes
Oncologic Multiple myeloma
Opthalmologic No underlying causes
Overdose / Toxicity No underlying causes
Psychiatric No underlying causes
Pulmonary Sarcoidosis
Renal / Electrolyte Hyperkalaemia, hypokalaemia
Rheum / Immune / Allergy Ankylosing spondylitis, dermatomyositis, scleroderma (systemic sclerosis), SLE, rheumatoid arthritis
Sexual No underlying causes
Trauma No underlying causes
Urologic No underlying causes
Dental No underlying causes
Miscellaneous Amyloidosis, degenerative diseases, enhanced vagal tone (for example in athletes), normal variants, pain, sleep , trauma

Causes in Alphabetical Order

References


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