Well, just in case you need some help, the number to dial is 112.
In Italy all previous numbers are still active, so if you want you can use them:
112 for Carabinieri
113 for Police
115 Fire Brigades
118 Sanitary Emergencies
If you are EU resident, bring your TEAM card with you if you need medical assistance (the one you use in your country). If you are NOT EU resident, all urgent treatments and life saving activities are guaranteed for free in any public or private affiliated hospital.