The case against Dr Motwani, one of Britain's leading heart specialists, who is facing allegations of misconduct, was halted after an expert witness pulled out.
The allegations against Dr Motwani include acting in a manner "not clinically appropriate" for some heart patients, and, in some cases, acting in an unethical way, risking their cardiac conditions. Dr Joe Motwani denied 30 allegations relating to the treatment of 24 patients between 2003 and 2007.
After 90 minutes being questioned at the General Medical Council (GMC) hearing in London, Dr John Swan, the expert witness left the hearing room. He had been giving evidence at the hearing for five days and had produced reports into as many as 18 patients in the case before he walked out. He left a note claiming his opinions were "questionable".
Dr Swan originally claimed Dr Motwani's use of experimental surgery was inappropriate. He had also criticized Dr Motwani's "poor judgment" in performing medical procedures. However, after he ruled himself out as an expert, the GMC was unable to rely on his evidence.
Dr Motwani, who has worked at Derriford Hospital in Plymouth since 1999, became well known as a pioneer of surgery to clear blocked coronary arteries by inserting a wire in a patient's wrist. He is now being accused of putting "personal ambition" above patient safety at Derriford Hospital, Plymouth.
The GMC heard how Dr Motwani performed inappropriate surgery on patients so he could brag about his success score. It also heard how a patient died during a second operation to unblock his arteries "which he should not even have been undergoing", it is said.
Andrew Hurst, for the GMC, admitted Dr Swan's opinions were now invalid after it was revealed he was lacking in experience to call himself an expert.
The Hearing continues.