Using Qualitative Methods to Understand Perceptions of Risk and Condom Use in African American College Women: Implications for Sexual Health Promotion.

Background: Young African American women are disproportionately affected with sexually transmitted infections (STIs) and unintentional pregnancies. Despite adequate knowledge, assertiveness, and negotiation skills, consistent condom use remains low.

Aims: We sought to assess the role of pregnancy and STI risk perception in condom decision making among African American women.

Myocardial cytochrome oxidase activity increases with age and hypoxemia in patients with congenital heart disease.

Background: Myocardial tolerance to ischemia is influenced by age and preoperative cyanosis through unknown mechanisms and significantly affects postoperative outcomes. Cytochrome c oxidase (CcOx), the terminal enzyme of the mitochondrial electron transport chain, may play a role in the susceptibility to ischemic-reperfusion (IR) injury. Our study aimed at investigating changes in human myocardial CcOx activity based on age and preoperative oxygen saturation to understand its role in transition from neonatal to mature myocardium and hypoxic conditions.