Final answer:
Cardiology is the medical specialty that studies the nature and cause of disease related to the heart. Cardiologists are doctors who specialize in diagnosing and treating heart diseases, including heart failure.
Step-by-step explanation:
Cardiology is the medical specialty that studies the nature and cause of disease related to the heart. Cardiologists are doctors who specialize in diagnosing and treating heart diseases, including heart failure. They undergo extensive medical training and clinical experience to become experts in this field.