Save. A hookah is a type of water pipe used to smoke flavored tobacco, which is a popular social activity among young adults in the United States, the United Kingdom and the Middle East.ave. A hookah is a type of water pipe used to smoke flavored tobacco, which is a popular social activity among young adults in the United States, the United Kingdom and the Middle East.
Cardiovascular (heart) surgery is surgery on the heart or great vessels performed by cardiac surgeons.
Circulatory System Procedures. Cardiologist â a physician specializing in the diagnosis and treatment of diseases of the circulatory system, especially, the heart. However, after diagnosis, he/she may refer to a cardiovascular surgeon. A cardiologist does not do surgery. Hematologist â a physician specializing in diseases of the blood.