Expert: doctornihil replied 6 years ago. Hi, The hypoplasia of A1 segment of the right anterior cerebral artery and of the P1 segment of the right posterior cerebral artery is a congenital variation ('birth defect'), which increases the chances of ischemic stroke (reduced blood circulation in the brain). Ask Your Own Medical Question.
Premature ventricular contractions (PVCs) are extra, abnormal heartbeats that begin in one of your heart's two lower pumping chambers (ventricles).These extra beats disrupt your regular heart rhythm, sometimes causing you to feel a flip-flop or skipped beat in your chest.remature ventricular contractions (PVCs) are extra, abnormal heartbeats that begin in one of your heart's two lower pumping chambers (ventricles).
What are VOCs? Volatile organic compounds are chemicals used to manufacture and maintain building materials, interior furnishing, cleaning products and personal care products. Volatile means that these chemicals evaporate or can easily get into the air at room temperature. Organic means these chemicals are carbon based. The term chemical emissions refers to VOCs as they evaporate into the air from products.