Updated at 23:10 KST to include additional expert comments

New footage of Kim Jong Un conducting his first inspection visit after weeks of speculation over his health suggests he may have undergone a medical procedure, analysis by NK News revealed Saturday.

The North Korean leader was seen on Korean Central Television (KCTV) riding in an electric cart around the Sunchon Phosphatic Fertilizer Factory on Friday, a location he had visited in January without the need for any such vehicle.

Kim was also seen with a mark on his inner right wrist which was not present in his last appearance of April 11, which specialists said could signify he underwent a medical procedure during his absence.

Footage released on Saturday showed Kim walking to and from the mobile cart, with a labored walk and standing while speaking to other officials, both not atypical when compared to other recent appearances.

Notably, the electric cart appears similar to one which was pictured in photos of Kim Jong Un after his longest absence from public eye in the fall of 2014.

When Kim reappeared with a walking stick on October 14, 2014 – following suspected surgery on his ankle or leg – the green cart could be seen in the background of stills and video released by official media.

The presence of the cart on Saturday could, therefore, be an indicator surrounding the North Korean leader’s health status following his latest hiatus from state media.

Kim Jong Un has, however, been known to use a golf cart on occasions in the past when his health was not a subject of international interest, making it unclear if its presence in the May 1 inspection was due to health concerns.

For example, Kim used a similar cart during a meeting with Chinese President Xi Jinping last June, and at the Mirim Riding Club in 2013.

But just weeks before he used the cart at his reemergence inspecting the Wisong Scientists Residential District in late 2014, state media appeared to acknowledge some form of health issues amid his extended absence in a documentary on his day-to-day work.

The documentary’s narrator Ri Chun Hee mentioned Kim was “not feeling well” over footage of him limping and lumbering, expressing the typical idea that he is working overtime for the North Korean people.

A dark colored mark could also be seen on Kim’s arm in video captured from his May 1 appearance, which was not there at a Politburo meeting appearance on April 11.

Medical professionals who assessed the footage on Saturday said it may be related to a cardiovascular procedure.

“It looks like a right radial artery puncture … [which is] often used for access to the coronary arteries for stent placement,” one U.S.-trained medical professional told NK News, adding it appeared to be “about a week old.”

“It is hard to tell from the foreshortening of the photograph, but it seems a bit medial,” they said. “It is not an IV (intravenous), which wouldn’t leave such a mark.”

A surgeon in South Korea also told NK News that the mark on Kim Jong Un’s arm “looks more plausible to be a procedure or check-up mark from a procedure on a heart-related issue,” given such issues run in Kim’s family.

But not all experts agree that the mark on Kim’s wrist is a sign of a cardiovascular procedure.

“From these pictures, this dot is not likely to be a radial puncture site. The position would be wrong and the appearance would be unusual,” Jason H. Wasfy, a Cardiologist at Massachusetts General hospital and Assistant Professor at Harvard Medical School, told NK News.

“So I think this is not likely [a radial puncture] based on these pictures. It normally would be closer to the thumb.”

Wasfy added that an IV would also not result in that position or appearance of a puncture mark, and that one would expect to see bruising around the mark in such cases.

The potential indicators come after the Daily NK cited an anonymous source in April who said Kim Jong Un had undergone a “cardiovascular procedure.” Other reports and rumors later referred to Kim having received a stent insertion to address a heart problem.

Coincidentally, a documentary mentioning Kim Jong Un’s health problems in 2014 was rebroadcast on KCTV on Friday evening this week – the day before news broke on his visit to Sunchon.

Following Kim’s reemergence in late 2014, he continued to use a walking cane in appearances through the end of October.

He was not seen using a cane in Saturday’s broadcast of his inspection of the Sunchon factory, however.

In the full video of the May 2 KCTV segment above, Kim is seen riding the electrical cart around the fertilizer factory grounds but also walking mobile in ways typical to his other recent site inspections | Video: KCTV

Jeongmin Kim also contributed to this report

Edited by Oliver Hotham