are intended specifically to control, diagnose, monitor or correct a defect of the heart or of the central circulatory system through direct contact with those parts of the body, in which case they are classified as class III;
má beartaíodh iad go sonrach chun neamhord croí nó neamhord an lárchórais imshruthaithe a rialú, a dhiagnóisiú, a cheartú nó chun faireachán a dhéanamh ar a leithéid trí theagmháil dhíreach leis na baill sin den chorp, agus sa chás sin tá siad aicmithe mar aicme III;