|  R00 |  | Abnormalities of heart beat  | 
	
		|  |  | 
	
		| Excludes1 | abnormalities originating in the perinatal period (P29.1-) 
 |  
		| Excludes2 | specified arrhythmias (I47-I49) 
 |  | 
|  |  | 
	
		|  R00.0 |  | Tachycardia, unspecified |  
		|  |  | 
| Rapid heart beat |  | Sinoauricular tachycardia NOS |  | Sinus [sinusal] tachycardia NOS |  
		| Excludes1 | inappropriate sinus tachycardia, so stated (I47.11) neonatal tachycardia (P29.11)
 paroxysmal tachycardia (I47.-)
 
 |  |  | 
|  |  | 
	
		|  R00.1 |  | Bradycardia, unspecified |  
		|  |  | 
| Sinoatrial bradycardia |  | Sinus bradycardia |  | Slow heart beat |  | Vagal bradycardia |  
		| UseAdditionalCode | code for adverse effect, if applicable, to identify drug (T36-T50 with fifth or sixth character 5) 
 |  
		| Excludes1 | neonatal bradycardia (P29.12) 
 |  |  | 
|  |  | 
	
		|  R00.2 |  | Palpitations |  
		|  |  |  |  | 
|  |  | 
	
		|  R00.8 |  | Other abnormalities of heart beat |  | 
|  |  | 
	
		|  R00.9 |  | Unspecified abnormalities of heart beat |  |