Sinoatrial nodal reentry tachycardia

Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]

Synonyms and keywords: SA nodal reentrant tachycardia; SANRT; sinus node reentrant tachycardia

Overview

Sinoatrial nodal reentry tachycardia (SANRT) is caused by a reentry circuit localized to the SA node.

Causes

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

Cardiovascular	Congenital heart disease, ischemic heart disease, post cardiac surgery, valvular heart disease
Chemical/Poisoning	No underlying causes
Dental	No underlying causes
Dermatologic	No underlying causes
Drug Side Effect	No underlying causes
Ear Nose Throat	No underlying causes
Endocrine	No underlying causes
Environmental	No underlying causes
Gastroenterologic	No underlying causes
Genetic	No underlying causes
Hematologic	No underlying causes
Iatrogenic	Post cardiac surgery
Infectious Disease	No underlying causes
Musculoskeletal/Orthopedic	No underlying causes
Neurologic	No underlying causes
Nutritional/Metabolic	No underlying causes
Obstetric/Gynecologic	No underlying causes
Oncologic	No underlying causes
Ophthalmologic	No underlying causes
Overdose/Toxicity	No underlying causes
Psychiatric	No underlying causes
Pulmonary	No underlying causes
Renal/Electrolyte	No underlying causes
Rheumatology/Immunology/Allergy	No underlying causes
Sexual	No underlying causes
Trauma	No underlying causes
Urologic	No underlying causes
Miscellaneous	No underlying causes

Diagnosis

SA node reentry tachycardia has a normal activation sequence with normal appearing p-wave that precedes a regular, narrow QRS complex.
Although it cannot be distinguished on the surface 12 lead EKG from sinus tachycardia, unlike sinus tachycardia, SA node reentry tachycardia does often terminate with vagal maneuvers.

References

Overview