Regular
AV Node Independent
Sinus tachycardia
Atrial tachycardia (uni-focal or multi-focal)
Atrial fibrillation
Atrial flutter
Idiopathic fascicular left ventricular tachycardia
AV Node Dependent
Paroxysmal supraventricular tachycardia (PSVT)
AV node re-entry tachycardia (AVNRT)
AV re-entry tachycardia (AVRT)
Lown-Ganong-Levine<unk> 
Wolff–Parkinson–White<unk> 
Junctional tachycardia
Irregular
Multifocal atrial tachycardia (MAT)
Sinus tachycardia with frequent PACs, PJCs, PVCs
Atrial fibrillation
Atrial fibrillation with RVR
Atrial flutter with variable conduction
Digoxin Toxicity
AV Node Independent
Sinus tachycardia
Atrial tachycardia (uni-focal or multi-focal)
Atrial fibrillation
Atrial flutter
Idiopathic fascicular left ventricular tachycardia
AV Node Dependent
Paroxysmal supraventricular tachycardia (PSVT)
AV node re-entry tachycardia (AVNRT)
AV re-entry tachycardia (AVRT)
Lown-Ganong-Levine<unk> 
Wolff–Parkinson–White<unk> 
Junctional tachycardia
Sinus tachycardia
Atrial tachycardia (uni-focal or multi-focal)
Atrial fibrillation
Atrial flutter
Idiopathic fascicular left ventricular tachycardia
Paroxysmal supraventricular tachycardia (PSVT)
AV node re-entry tachycardia (AVNRT)
AV re-entry tachycardia (AVRT)
Lown-Ganong-Levine<unk> 
Wolff–Parkinson–White<unk> 
Junctional tachycardia
AV node re-entry tachycardia (AVNRT)
AV re-entry tachycardia (AVRT)
Lown-Ganong-Levine<unk> 
Wolff–Parkinson–White<unk> 
Lown-Ganong-Levine<unk> 
Wolff–Parkinson–White<unk> 
Multifocal atrial tachycardia (MAT)
Sinus tachycardia with frequent PACs, PJCs, PVCs
Atrial fibrillation
Atrial fibrillation with RVR
Atrial flutter with variable conduction
Digoxin Toxicity
Atrial fibrillation with RVR
Cardiac
Inferior MI (involving RCA)<unk> 
Neurocardiogenic/reflex-mediated
Increased ICP
Vasovagal reflex
Hypersensitive carotid sinus<unk> 
Intra-abdominal hemorrhage (i.e. ruptured ectopic)
Metabolic/endocrine/environmental
Hyperkalemia
Hypothermia (Osborn waves on ECG)
Hypothyroidism
Myxedema coma
Hypoglycemia (neonates)
Toxicologic
B-blocker
Ca-channel blocker
Digoxin toxicity
Opioids
Organophosphates
Ethanol
Clonidine
Infectious/Postinfectious
Chagas disease
Lyme disease
Syphilis
Other
Brash<unk> 
Inferior MI (involving RCA)<unk> 
Increased ICP
Vasovagal reflex
Hypersensitive carotid sinus<unk> 
Intra-abdominal hemorrhage (i.e. ruptured ectopic)
Hyperkalemia
Hypothermia (Osborn waves on ECG)
Hypothyroidism
Myxedema coma
Hypoglycemia (neonates)
Myxedema coma
B-blocker
Ca-channel blocker
Digoxin toxicity
Opioids
Organophosphates
Ethanol
Clonidine
Chagas disease
Lyme disease
Syphilis
Brash<unk>
Sick sinus syndrome
Regular
Hypertrophic cardiomyopathy
AV Node Independent
Brugada syndrome
Sinus tachycardia
Decompression sickness
Atrial tachycardia 