ⅩⅧ.Symptoms, signs and abnormal clinical and laboratory findings, NEC (R00-R99)R00-R09.Symptoms and signs involving the circulatory and respiratory systemsR00.Abnormalities of heart beatR00.0.Tachycardia, unspecifiedR00.1.Bradycardia, unspecifiedR00.2.PalpitationsR00.8.Other and unspecified abnormalities of heart beatR01.Cardiac murmurs and other cardiac soundsR01.0.Benign and innocent cardiac m..