HARRISBURG, Pa. — Dr. Mehmet Oz, the Republican nominee for U.S. Senate in Pennsylvania, released his health records as he maneuvers to keep questions about Democratic rival John Fetterman’s recovery from a stroke front and center in the hotly contested campaign.

Dr. Rebecca Kurth in New York City wrote in a four-page letter that she found the 62-year-old heart surgeon-turned-TV celebrity to be in “excellent health” in an annual checkup Thursday.

The letter noted that Oz has a total cholesterol level that is “borderline elevated” but can be addressed by diet, and referenced that in 2010 he had a polyp — a growth that sometimes can become cancerous — removed from his colon. An electrocardiogram — a test that records electrical signals in the heart to detect heart problems — he had Thursday came out normal.

“Your examination is healthy, and the blood tests are favorable,” Kurth wrote. She recommended no medication.

The release of the health records comes as Oz is trying to close a gap in the polls and is increasingly making Fetterman’s fitness to serve a central theme in his campaign.

Fetterman, 53, has been silent about releasing medical records or providing access for reporters to question his doctors, now more than four months after he suffered a stroke in May that has had lingering effects on his speech and hearing.

Two editorial boards, of The Washington Post and the Pittsburgh Post-Gazette, have called for Fetterman to release medical records after his refusal to debate Oz more than once. The Post-Gazette said that should include cognitive tests and making his doctors available to reporters.

It said Oz should release his medical records, too — a request to which Oz quickly agreed.

Fetterman’s campaign did not immediately comment Friday. He has been receiving speech therapy and, in June, his campaign released a letter from his cardiologist saying that Fetterman will be fine and able to serve in the Senate if he eats healthy foods, takes prescribed medication and exercises.