Dr. John Floras

2025 HHF LIFETIME ACHIEVEMENT AWARD

Dr. John Floras is a Professor of Medicine at the University of Toronto, and a Senior Scientist of the Toronto General Research Institute.

After graduating in Medicine from Toronto, he was awarded a Rhodes Scholarship. His D.Phil. thesis at the University of Oxford concerning the brain’s regulation of the circulation informed now well-established concepts such as ‘white-coat hypertension’ and circadian blood pressure rhythm. In 1983 he became the first cardiologist of Greek descent in Toronto. In 1985, he established the first cardiovascular laboratory in Canada with the capacity to also record impulses from nerves that regulate blood pressure. Subsequently, as Mount Sinai Hospital’s Head of Cardiology, he developed a unique research complex, comprising catheterization, sleep, exercise and clinical physiology laboratories.

With support from the Heart and Stroke Foundation, the CIHR, a Canada Research Chair, and philanthropic donors, he defined or discovered pathways by which sensory nerves originating within the heart, major blood vessels and muscles appreciate changes in blood pressure or blood volume and how their actions in response to such alterations deteriorate in conditions such as high blood pressure and heart failure. His observations have inspired new therapies for these conditions.

In the course of these heart failure experiments his team discovered, serendipitously, a high prevalence of sleep apnea. Subsequent research documented its adverse effects on the heart, brain structure and function, nervous system and blood pressure. In some, treating sleep apnea led to recovery of heart function. With colleagues, he then conducted the first large multi-national heart failure trials of treating sleep apneas in heart failure.

Dr. Floras has published over 300 articles in influential journals and the first book focused on sleep apnea and cardiovascular disease. He has delivered over 350 invited lectures and seminars world-wide. His research has been recognized by awards from Canadian, American and International societies.

He has devoted considerable effort to mentoring colleagues and supporting early career investigators. After serving as President of the Canadian Hypertension Society, he deployed its endowment to build research capacity in this discipline. From 2009-2015 he Chaired the Board of The Banting Research Foundation, Canada’s oldest medical grant agency.

In 2006 he was appointed an Archon of the Greek Orthodox Church by the Ecumenical Patriarch Bartholomew I. In 2013, he was honoured by the Hellenic Cardiological Society for a lifetime of service to the Science of Medicine. Married, since 1982, to Anita Karrys, he continues to be humbled by the capabilities and accomplishments of his wife and three daughters.