Actor Kamal Haasan will be an ambassador of a social service project that is aimed to help marginalized children suffering from heart ailments. The World Malayalee Council, in association with the Madras Medical Mission and the Malayala Manorama group of publications, will help 100 children from the marginalized sections of society and suffering from cardio disorder, to get medical aid through "Hridaya Raagam", A fundraiser musical programme "Shoba Hridaya Raagam" will be organised here Feb 24. Music director Ilayaraja will inaugurate the event and a large number of south Indian film stars are expected to participate