I49.8Other specified cardiac arrhythmias
Code usage status
Primary diagnosis
May be used as the primary diagnosis
Apply only when it matches the confirmed diagnosis and the documented clinical record.
Specificity
Complete code in the classification
Use when the diagnosis matches and no exclusion applies.
- Chapter IX
- Diseases of the circulatory system
- Group I30-I52
- Other forms of heart disease
- Official Vietnamese name
- Loạn nhịp tim xác định khác - Hội chứng
- Additional WHO coding guidance
- Brugada syndrome Long QT syndrome Rhythm disorder: coronary sinus ectopic nodal
Related I49 codes
I49
Other cardiac arrhythmias
I49.0
Primary diagnosis candidate
Ventricular fibrillation and flutter
I49.2
Primary diagnosis candidate
Junctional premature depolarization
I49.3
Primary diagnosis candidate
Ventricular premature depolarization
I49.4
Primary diagnosis candidate
Other and unspecified premature depolarization
I49.5
Primary diagnosis candidate
Sick sinus syndrome Tachycardia-
I49.9
Primary diagnosis candidate
Cardiac arrhythmia, unspecified
Clinical record checklist
View coding guide →- Confirm that the code matches the final documented diagnosis.
- Use one primary-diagnosis code and record only relevant additional conditions.
- Review Ministry indicators, inclusions, exclusions and notes.
- Do not infer a diagnosis beyond the clinical record.
2026 regulatory basis
Indicators are taken from columns 24–29 of the classification accompanying Circular 06/2026/TT-BYT, cross-referenced with Decision 1849/QĐ-BYT and Official Dispatch 4059/BYT-BH.
