David (Dave) R. Koolbergen is a congenital cardiothoracic surgeon who has been the associate of Mark G.Hazekamp for more than 20 years, for that period worked within the Centrum voor Aangeboren Hartafwijkingen Amsterdam Leiden (CAHAL). He is specialized in valve repair, valve sparing surgery and surgery for adults with congenital heart disease. In 2018 he introduced PEARS surgery in the Netherlands.
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