The Washington manual of echocardiography / editor, Nishath Quader, MD, FACC, FASE, Assistant Professor of Medicine, Cardiovascular Division, Washington University School of Medicine, St. Louis, Missouri ; associate editors, Majesh Makan, MD, FACC, FASE, Associate Professor of Medicine, Associate Director of Echocardiography, Division of Cardiology, Washington University School of Medicine, St. Louis, Missouri, Julio E. P©♭rez, MD, FACC, FASE, FACP, FAHA, Professor of Medicine, Director of Echocardiography, Cardiovascular Division, Barnes-Jewish Hospital, Washington University School of Medicine, St. Louis, Missouri.