Cardiologist (noun)

A medical doctor who specializes in the diagnosis and treatment of diseases and disorders of the heart and blood vessels.

Origin:

From the greek words 'kardia' meaning heart and 'logos' meaning study or discourse.

Examples:

1. My aunt visited the cardiologist for a check-up on her heart condition.
2. The cardiologist performed a procedure to unblock my dad's arteries.
3. The cardiologist recommended a change in my grandpa's diet to improve his heart health.
4. The cardiologist prescribed my friend some medication to control his high blood pressure.
5. The cardiologist monitored the progress of my sister's heart condition after her surgery.