Giorgos Mazonakis: New Questions Surround Kolonaki Clinic, Plasmapheresis Treatment and Final Hours

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New questions are emerging over the final hours of beloved Greek singer Giorgos Mazonakis, as authorities investigate what happened at a private clinic in Athens shortly before his death.

Mazonakis, 54, died on Wednesday, September 9, after suffering cardiac arrest. He was initially treated at a private clinic in Kolonaki before being transferred by emergency responders to Elpis Hospital, where doctors continued resuscitation efforts for around 50 minutes.

His death was announced by Elpis Hospital at approximately 5:40pm, sending shockwaves through Greece and the Greek entertainment world.

Police and health authorities are now examining the circumstances surrounding his treatment at the Kolonaki clinic and the events that preceded his collapse.

What happened at the Kolonaki clinic?

According to information reported by Greek media, Mazonakis had visited The Stem Cell Clinic on Tuesday, September 8, where he reportedly told doctors that he was feeling unwell.

The following day, he returned to the clinic, where a plasmapheresis procedure was reportedly carried out.

The treatment was undertaken by Dr Ioanna Gaka, who describes herself as a holistic doctor. Her professional profile lists a range of treatments and techniques, including plasmapheresis, intravenous therapies, ozone therapy, peptide therapies, colon hydrotherapy and other alternative or complementary approaches.

According to her statement to police, Mazonakis was already feeling unwell when he arrived for the appointment.

She reportedly said that his condition appeared concerning, but that the treatment nevertheless proceeded.

During the procedure, she said she inserted a second intravenous catheter into his left arm and noticed a sudden and significant drop in his blood pressure.

The moments before his collapse

According to the account given to police, Gaka and her husband attempted to resuscitate Mazonakis after his condition deteriorated.

Emergency responders subsequently continued CPR before transporting him to Elpis Hospital.

The exact sequence of events, including the timing of the cardiac arrest and the medical interventions administered at the clinic, remains under investigation.

Authorities are expected to rely on the autopsy, toxicology testing and histological examinations to establish the precise cause of death.

Initial hospital tests reportedly did not show obvious abnormalities, although medical experts have stressed that some cardiac markers can change over time.

This means the preliminary findings cannot, by themselves, establish exactly what caused Mazonakis’ fatal collapse.

Questions over the clinic and its equipment

Another key issue under investigation concerns the medical equipment available at the Kolonaki clinic.

According to the report, the doctor has maintained that the equipment used for the procedure was certified.

However, the Medical Association of Athens has reportedly stated that the facility holds a licence for a pathology clinic and does not have authorisation to provide plasmapheresis treatments.

A previous inspection in 2025 reportedly did not identify a plasmapheresis machine at the facility.

Newsit also reported that it located equipment associated with plasmapheresis and other blood purification procedures that was being used by Gaka.

Investigators will now have to determine whether the equipment was used on Mazonakis, whether it was appropriately certified and whether the procedure was authorised at the clinic.

Why did the rescuers not initially know who he was?

Questions have also been raised over the circumstances surrounding Mazonakis’ transfer to hospital.

According to the report, emergency services were not initially told during the call that the person experiencing cardiac arrest was the famous singer.

The rescuers reportedly did not immediately recognise him because he was wearing a mask.

It was only after the mask was removed that one of the responders realised the identity of the man receiving CPR.

The circumstances surrounding the emergency call and the actions of the clinic’s medical staff are now part of the investigation.

According to the report, the doctors at the clinic did not accompany Mazonakis to hospital and later appeared at a police station in Kypseli.

Investigation continues

The circumstances surrounding Giorgos Mazonakis’ death remain under investigation, and no definitive conclusions should be drawn until the medical and forensic examinations are completed.

The autopsy, toxicological analysis and histological examination are expected to provide crucial evidence about what happened to the singer and whether his treatment at the Kolonaki clinic played any role in his sudden deterioration.

For now, the central question remains unanswered: what caused the sudden collapse of one of Greece’s most recognisable singers shortly after he underwent treatment at the Athens clinic?

Mazonakis’ death at just 54 has left Greece mourning one of the country’s most distinctive and influential popular singers.

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