Pulmonary artery acceleration time in young children is determined by heart rate and transpulmonary gradient but not by pulmonary blood flow: A simultaneous echocardiography—cardiac catheterization study. - Tai, Christiana; Hsieh, Anyir; Moon‐Grady, Anita J.; Keller, Roberta L.; Teitel, David; Nawaytou, Hythem M. (Echocardiography, 2022)