The branch of medicine that studies and treats diseases of the heart and blood vessels.
It comes from Greek 'kardia', meaning 'heart', plus '-logia', meaning 'study of'. Many medical specialties use this pattern, like 'neurology' for nerves and 'dermatology' for skin.
The same Greek root 'kardia' that hides in 'cardio workout' lies at the heart of 'cardiology'. When you say 'cardiologist', you’re literally saying 'heart studier' in fancy Greek clothes.
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