HOUSTON — As Mark Langston spent Saturday resting comfortably and undergoing tests in a Houston hospital, his partner was still shaken over what he’d seen the night before.

Terry Smith, the Angels radio play-by-play announcer, said that he believed when Langston passed out in the booth, the outcome of his heart-related emergency could have been much worse.

“I can tell you this, in all certainty, they shocked him back to life,” Smith said. “If this happened in his hotel room, he would have died. And he knows it.”

Smith’s dramatic description of the scene that unfolded in their booth earlier Friday was in stark contrast to what was happening later Friday night. Smith and several others in the Angels’ traveling party stopped by the hospital to visit Langston.

“He was in good spirits,” Smith said. “He was joking. He was laughing.”

The Angels have released few details about Langston’s condition, although Smith said that Langston suffered a ventricular fibrillation, in which the heart beats rapidly but inadequately. The Angels announced that Langston, 59, was “resting comfortably” and “undergoing tests” in the hospital on Saturday afternoon.

Smith and Langston have been on-air partners for the past seven seasons. Previously, Langston had pitched 16 years in the majors, including eight with the Angels.

Smith said he had been with him in the hospital on Friday night and they texted throughout the day on Saturday.

“It seems like he’s fine,” Smith said, “but it’s really scary.”

Smith said they were preparing the broadcast as usual, with Langston doing the lineups and then tossing to him for the first pitch. Just as Smith was setting the scene for the game, he saw out of the corner of his eye that something was wrong with Langston.

Jim Saenz, one of the Angels traveling security officials, happened to be in the booth with them, and he immediately went to aid Langston. An Astros official saw from an adjacent booth what was happening, and within 90 seconds, by Smith’s estimate, police and paramedics were there.

As they scrambled to help Langston, Smith said he was unsure whether to continue doing the play by play. Then the Astros hit three homers in a five-run bottom of the first. Related Articles Freeway Series Photos: Will Smith hits go-ahead blast as Dodgers defeat Angels

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“It was unbelievably scary,” Smith said. “Then the bottom of the first gets going and they are hitting home runs like crazy and we are out of the game before the inning is over, and I’m thinking What am I doing right now? This guy is maybe going to die, and what am I doing? It seemed so meaningless.”

Fortunately, within an hour Langston was at the hospital and stabilized, and the Angels then announced that he was alert and undergoing tests.

As good thoughts came streaming in from all over to the Angels and to Smith, he finished the game and met Langston at the hospital, where he was put at ease by his demeanor.

“We had a really good conversation,” Smith said. “He was normal. He kept saying, I’m feeling perfect. I’m feeling normal.’”