Note: the service only applies if the patient meets one or more of the following and the requirements of Note: IR.1.2 Frequent repetition serial real time transthoracic echocardiographic examination of the heart with real time colour flow mapping from at least 3 acoustic windows, with recordings on digital media, if the service: (a) is for the investigation of a patient who: (i) has an isolated pericardial effusion or pericarditis; or (ii) has a normal baseline study, and has commenced medication for non‑cardiac purposes that has cardiotoxic side effects and is a pharmaceutical benefit (within the meaning of Part VII of the National Health Act 1953) for the writing of a prescription for the supply of which under that Part an echocardiogram is required; and (b) is not associated with a service to which: (i) another item in this Subgroup applies (except items 55137, 55141, 55143, 55145 and 55146); or (ii) an item in Subgroup 2 applies (except items 55118 and 55130); or (iii) an item in Subgroup 3 applies (R)