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).
Volatile Organic Compounds in Your Home. Volatile Organic Compounds (VOCs) are a large group of chemicals that are found in many products we use to build and maintain our homes. Once these chemicals are in our homes, they are released or âoff-gasâ into the indoor air we breathe.