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).
Fluorescence-activated cell sorting (FACS) is a specialized type of flow cytometry. It provides a method for sorting a heterogeneous mixture of biological cells into two or more containers, one cell at a time, based upon the specific light scattering and fluorescent characteristics of each cell.he acronym FACS is trademarked and owned by Becton, Dickinson and Company. Among the large majority of researchers who use this technology for sorting or analysis, this term has become genericized, much like Xerox for photocopy or Kleenex for facial tissue.