Hoping to reassure his colleagues that he’s bodily in a position to proceed as minority chief, Senator Mitch McConnell launched a letter on Tuesday from the attending doctor of Congress declaring that an examination and exams had dominated out a stroke or seizure as causes of his current on-camera medical episodes.

In the letter, Dr. Brian P. Monahan, the Navy rear admiral who serves as the on-site doctor in the Capitol for members of Congress and the Supreme Court, mentioned his examination of Mr. McConnell, Republican of Kentucky — together with a mind M.R.I., an electroencephalogram research and a neurological session — had discovered no signal of a seizure dysfunction or stroke.

Both prospects and others have been raised by medical professionals who watched video of Mr. McConnell inexplicably freezing up throughout a news convention final week in addition to the same episode on the Capitol in July.

“There is no evidence that you have a seizure disorder or that you experienced a stroke, TIA or movement disorder such as Parkinson’s disease,” the letter mentioned, utilizing a shorthand for transient ischemic assault, a form of mini stroke. “There are no changes recommended in treatment protocols as you continue recovery from your March 2023 fall.”

Mr. McConnell and his aides have attributed each alarming medical episodes to lightheadedness stemming from a concussion he suffered after a serious fall at a Washington hotel in March, in addition to being dehydrated on the time of his appearances. Dr. Monahan cited the same purpose when he issued a letter after Mr. McConnell’s incident final week earlier than having examined him or performed any exams.

With the Senate returning on Tuesday after the prolonged August break, Republicans will collect for the primary time since Mr. McConnell’s newest public incident, which has raised quiet questions on his means to guide Senate Republicans and spurred speculation about a possible succession. The launch of the second medical notice from the Capitol doctor gave the impression to be an effort to go off any actual motion relating to his management and to indicate colleagues he was not hiding the true extent of his medical situation.

So far, no senator has publicly referred to as for any dialogue of Mr. McConnell’s well being, and most Republicans who’ve spoken have been supportive of him.

“Mitch is sharp, and he is shrewd,” Senator Mike Rounds, Republican of South Dakota, mentioned Sunday on CNN. “He understands what needs to be done. I will leave it up to him as to how he wants to discuss that with the American public. But there’s no doubt in my mind that he is perfectly capable of continuing on at this stage of the game.”

Senate Republicans are scheduled to collect on Wednesday for his or her first personal luncheon since July.

After final week’s incident, Mr. McConnell referred to as quite a few senators to attempt to allay fears about his well being. He advised them that the incidents had been clearly unwanted side effects of his fall and had solely occurred twice, although every time had been in entrance of tv cameras current to file his remarks to the media.

Dr. Monahan not often speaks in public about his job — and nearly by no means concerning the medical situation of a member of Congress — strongly suggesting that the pair of temporary statements he has written up about Mr. McConnell’s situation over the previous few had been solicited by the senator. An inside drugs, hematology and medical oncology physician, he has served because the attending doctor since 2009, when he was nominated to the submit by President Barack Obama.