Junctional tachycardia causes

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Junctional tachycardia Microchapters


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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]; Associate Editor(s)-in-Chief: Ayokunle Olubaniyi, M.B,B.S [2]


Junctional tachycardia may oocur either as a result of enhanced automaticity of the AV node when the SA node is bradycardic or discharges at a slower rate than the AV node (e.g. myocardial infarction, digitalis toxicity) or when an ectopic focus with an abnormal automaticity develops within or adjacent to the AV junction. Other causes include: hypoxia, electrolyte imbalance, and infections such as rheumatic fever, Lyme disease.


Life Threatening Causes

Life-threatening causes include conditions which may result in death or permanent disability within 24 hours if left untreated.

Common Causes

Causes by Organ System

Cardiovascular Cardiac surgery, LQT type 4, myocardial infarction, pericarditis, Wolff-Parkinson-White syndrome
Chemical/Poisoning Grayanotoxin
Dental No underlying causes
Dermatologic No underlying causes
Drug Side Effect Amiodarone, beta blockers, cimetidine, clonidine, diltiazem, flumazenil, guanethidine, isoproterenol infusion, lithium, methyldopa, reserpine, verapamil
Ear Nose Throat No underlying causes
Endocrine Hemochromatosis, hypothyroidism
Environmental Hypothermia
Gastroenterologic No underlying causes
Genetic Emery-Dreifuss muscular dystrophy, LQT type 4, muscular dystrophy, Wolff-Parkinson-White syndrome
Hematologic No underlying causes
Iatrogenic Cardiac surgery
Infectious Disease Chagas disease, diphtheria, leptospirosis, Lyme disease, rheumatic fever, salmonella typhosa, trichinosis
Musculoskeletal/Orthopedic Emery-Dreifuss muscular dystrophy, muscular dystrophy
Neurologic No underlying causes
Nutritional/Metabolic Hypokalemia, hypothermia
Obstetric/Gynecologic No underlying causes
Oncologic No underlying causes
Ophthalmologic No underlying causes
Overdose/Toxicity Beta blockers, carbamazepine poisoning, digitalis toxicity, lithium
Psychiatric No underlying causes
Pulmonary Hypoxia
Renal/Electrolyte Hypokalemia
Rheumatology/Immunology/Allergy Amyloidosis, scleroderma
Sexual No underlying causes
Trauma No underlying causes
Urologic No underlying causes
Miscellaneous No underlying causes

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