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2008 ICD-9-CM Volume 1 Diagnosis Codes Home > Diseases Of The Circulatory System 390-459 > Other Forms Of Heart Disease 420-429 > Cardiac Dysrhythmias 427.* > 2008 ICD-9-CM Diagnosis 427.81 Sinoatrial node dysfunction  On October 1, 2008 the 2009 ICD-9-CM codes came into effect. Therefore, this code may be out of date. The 2009 version of ICD-9-CM 427.81 can be accessed here. Dysfunction of the sinoatrial node manifested by persistent sinus bradycardia, sinus arrest, sinoatrial exit block, chronic atrial fibrillation and inability of the heart to resume sinus rhythm following cardioversion for atrial fibrillation. 427.81 is a specific code that can be used to specify a diagnosis 427.81 contains 18 index entries View the ICD-9-CM Volume 1 427.* hierarchy 427.81 also known as: Sinus bradycardia: persistent severe Syndrome: sick sinus tachycardia-bradycardia 427.81 excludes: sinus bradycardia NOS (427.89) Index entries containing 427.81: Bradycardia 427.89 chronic (sinus) 427.81 sinoatrial 427.89 with paroxysmal tachyarrhythmia or tachycardia 427.81 chronic 427.81 sinus 427.89 with paroxysmal tachyarrhythmia or tachycardia 427.81 chronic 427.81 persistent 427.81 severe 427.81 tachycardia syndrome 427.81 Dysfunction sinoatrial node 427.81 Pause, sinoatrial 427.81 Sick sinus syndrome 427.81 Sinus - see also Fistula bradycardia 427.89 chronic 427.81 Syndrome - see also Disease bradycardia-tachycardia 427.81 sick sinus 427.81 tachycardia-bradycardia 427.81 Tachyarrhythmia, tachyrhythmia - see also Tachycardia paroxysmal with sinus bradycardia 427.81 Tachycardia 785.0 paroxysmal 427.2 with sinus bradycardia 427.81 sick sinus 427.81