A cardiac ___ is a battery-powered device that is implanted under the skin and wired to the SA node in the heart. pacemaker An ultrasound procedure that directs sound waves through the heart to evaluate heart function is called?
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Cigarette smoke contains carbon monoxide. When inhaled, carbon monoxide in cigarettes reduces the ability of red blood cells to carry oxygen to tissues in the body and brain. As carbon monoxide levels in the blood increase, oxygen levels in the blood decrease.