Selangor director of health Dr Ummi Kalthom Shamsudin said the two operating theatres at Sultan Idris Shah Hospital were now running “around the clock”, Bernama reported.

Ummi also said that a contractor, under the supervision of the public works department is looking into the cause of the problem.

The power disruptions led to the temporary closure of the hospital’s heart centre from July 22, four days after the health ministry outsourced cardiothoracic surgery to private hospitals to reduce waiting times.

On Wednesday, The Star reported that surgeries at the heart centre “came to a halt again”, a little over a month after its four non-functional operating theatres underwent major repair.

Quoting sources, the closure on July 22 affected some 50 patients scheduled for heart surgeries, while 1,000 others were on the waiting list.