San Fernando Valley seniors and health care officials were left with nagging worries on Tuesday following Gov. Jerry Brown’s decision to discontinue funding for key health services, saying the ripple effect would have a devastating impact on their families and their future. On Monday, Brown vetoed a bill to continue funding for adult day health care, a blow to the state’s 300 adult day health care centers that provide an array of services, including medical care, counseling and physical therapy to sick and disabled adults. The move follows Brown’s decision to nix $169 million for the adult care program from the state budget signed last month. Los Angeles has more than half of the state’s adult day health care centers.