Cardiac Water and Fluoromethane Cardiac PET

Comparison of Cardiac Perfusion by O15-water and F17-fluoromethane PET

In this study we are looking at the blood flow to the heart using two different chemical tags or tracers that give off a low level of radiation. The tracers used in this study are called O15-water and F17-fluoromethane. These tracers mix with the blood and will move through the body. The researchers will use positron emission tomography (PET scans)to track the tracers as they moe through the heart and chest.

Inclusion Criteria:

• 1. Age 18 to 40 years old 2. Willing to provide written informed consent

Exclusion Criteria:

• 1. A history of CAD 2. A history of active bronchospasm or asthma on theophylline bronchodilators 3. A history of any cardiac risk factors including: HTN, Diabetes, Hyperlipidemia, Smoking, and premature CAD in immediate family member 4. A history of liver disease or other significant disease 5. Females who are pregnant or lactating