From Longman Dictionary of Contemporary Englishcardiologistcar‧di‧ol‧o‧gist /ˌkɑːdiˈɒlədʒɪst $ ˌkɑːrdiˈɑː-/ noun [countable] medical a doctor who studies or treats heart diseases
Examples from the Corpus
cardiologist• The next year she was referred to both a chest physician and a cardiologist but no further investigations were done.• I examined him and suggested referral to a cardiologist but this he absolutely refused.• The next year she was referred to a cardiologist.• While a variety of medications are prescribed by cardiologists and family physicians, Questran is most recommended to fight high cholesterol.• No cardiologist would insert a balloon.• She was referred again to the same cardiologist the next year and the exercise test was again negative and she was reassured.• That non-detection is not a surprise to cardiologists, many of whom say arrhythmia can be difficult to find. 