Two prominent Montreal cardiologists are facing disciplinary hearings before the Quebec College of Physicians over allegations they took money from a patient in exchange for future medical services.

The college confirmed Tuesday it's investigating Dr. Mark Eisenberg and Dr. Andre Pasternac, well-respected physicians in their field.

The allegations against the cardiologists stem from a complaint made by convicted murderer Valery Fabrikant, who shot and killed four of his colleagues at Montreal's Concordia University in 1992.

In one of several lawsuits he has filed since beginning his life sentence in prison, Fabrikant, a former mechanical engineering professor, alleged Eisenberg and Pasternac took thousands of dollars from him in exchange for future medical care.

In the suit, Fabrikant alleged he gave Eisenberg $1,500 to ensure he would perform an angioplasty -- a procedure to open blocked veins -- on him if needed. He also alleged he gave Pasternac $5,000 for future cardiac care.

After bouncing around the court system, Fabrikant's lawsuit was recently dismissed by the Supreme Court of Canada as "frivolous."

But an earlier court ruling found that even though both doctors returned the cash, they "...admit having accepted substantial amounts of money (from Fabrikant) in circumstances that have not been clearly explained."

The court suggested it would be up to the Quebec College of Physicians to look into whether the doctors violated their code of ethics.

The college has said the disciplinary hearings will likely begin in May.

Fabrikant's request for special status at those hearings has been denied.

With a report from CTV's Genevieve Beauchemin in Montreal