Q1. Which of the following is not a feature of Hemodynamic Significant Patent Ductus Arteriosus (HSPDA)?
- (1) Bowing of intertribal septum to right with enlarged left atrium and left ventricle
- (2) Transductal diameter >3 mm
- (3) Left atrial/ aortic root width ratio >1.6:1
- (4) Retrograde diastolic flow >50% of forward flow.