Cardiac surgeons, after several tests, diagnosed that Ali was suffering from 'acute coronary syndrome', which, in simple terms, means there was blockage of blood flow in his heart.
Abid, who is playing for Central Punjab in the tournament, twice complained of chest pain after which his team manager, Ashraf Ali, decided to rush him to hospital for medical attention and tests.
Zimbabwe were 52 for four and found themselves in a precarious position as they needed another 259 runs to avoid the follow-on and trailed Pakistan's 510 for eight declared by a whopping 458 runs.
He has shown no signs of concussion but has undergone a precautionary CT scan which also has returned normal, read a statement from Pakistan Cricket Board (PCB).
Captain Azhar Ali (57) and Babar Azam (22) were unbeaten at the close of play, but it was Abid (174) and Shan Masood (135) who stole the show earlier with a huge opening stand of 278.
Abid hit his century on the third day of the second match against Sri Lanka at the National Stadium here as he swept off spinner Lasith Embuldeniya for two runs.
Abid became the first batsman in history to score hundreds on both Test and ODI debuts.
With the triple-figure mark on Sunday, Abid also became the first Pakistan batsman to make a ton in Rawalpindi since 2000 and the first on home soil since 2008.
Chasing 298 for victory, Pakistan rode on Fakhar Zaman's 76 from 91 balls and Abid Ali's 74 off 67 balls to set the tone early on as the pair added 123 for the opening wicket.
Abid Ali hit 112 off 119 balls and Mohammad Rizwan smashed 104 off 102 deliveries before Australia came back to restrict Pakistan to 271-8 in their chase of 278 and pick up their fourth straight win in the five-match series.
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