R00 - Abnormalities of heart beat
Excludes 1:
-abnormalities originating in the perinatal period P29.1-)
-specified arrhythmias (I47-I49)
R00.0 - Tachycardia, unspecified
R00.1 - Bradycardia, unspecified
R00.2 - Palpitations
R00.8 - Other abnormalities of heart beat
R00.9 - Unspecified abnormalities of heart beat