Junctional tachycardia causes

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

Overview

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.

Causes

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

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

Junctional tachycardia causes developed by WikiDoc.org

References

Overview