A Swiss cardiologist has come under fire for claiming that the White Helmets had faked a photo of a victim of a chemical weapons attack and not deleting his original disinformative tweet.

In a tweet posted on April 14, Thomas Binder said "As a cardiologist I can say that these ECG electrodes are completely wrong positioned. They would not get any signal. This picture is faked!" jumping to the conclusion that the whole attack was staged by the White Helmets.

His tweet garnered more than 13,000 likes and 12,000 retweets.

However, as seen in his thread, the cardiologist does later admit that he was wrong, saying he only saw the electrodes in the center. However his apology hasn't caught on nearly as much as his accusation, as some Twitter users have pointed out.

Other medical students, fellow cardiologists and health care professionals have also discredited his claims, saying the leads were taped appropriately and the placement would indeed give a viable reading.

Binder's mea culpa has also been criticized for not being sincere; for using the opportunity as another dig at the Syrian rescue workers instead of bringing the truth to light.

The tweets come amid photographs purporting to show the White Helmets staging a chemical attack in Eastern Ghouta, which were found out to be actually taken from a film set.

The White Helmets, a humanitarian organization made up of some 3,000 volunteers, has regularly been the target of disinformation campaigns by the Syrian regime and conspiracy theorists online.

The photos -- which show actors covered in dust, with bloody makeup and a clapper board -- were presented by supporters of Bashar Assad as proof that the alleged chlorine and sarin gas attack in the opposition-held town of Douma on April 7 was fake.

But the photos come from the set of a Syrian film called "Revolution Man", supported by the Syrian culture ministry, and were published in February on a Facebook page devoted to the movie, according to Factuel, an AFP fact-checking blog.

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