AZ HB2472

Establishes a presumption that heart-related, perivascular, or pulmonary injuries or deaths of firefighters are occupational diseases compensable under workers' compensation if the firefighter passed a pre-employment physical showing no evidence of such conditions.

Requires the firefighter to have received a physical examination aligned with National Fire Protection Association Standard 1582 (NFPA 1582) and to have been exposed to a known event with the injury or death occurring within 24 hours of exposure and reasonably related to it.

Makes the presumption conclusive and irrebuttable if all requirements are met, unless the firefighter's exposure to cigarettes or tobacco products outside official duties is a substantial contributing cause.

Applies to firefighters and volunteer firefighters as defined in Arizona Revised Statutes section 23-901, paragraph 6, subdivision (d).