Editing Tetralogy of Fallot (section)

=== Chest radiograph ===
Before more sophisticated techniques became available, chest X-ray was the definitive method of diagnosis. The abnormal "[[coeur-en-sabot]]" (boot-like) appearance of a heart with tetralogy of Fallot is classically visible via chest X-ray, although most infants with tetralogy may not show this finding.<ref>{{cite web| vauthors = Weerakkody Y |title=Tetralogy of Fallot – Radiology Reference Article |url=http://radiopaedia.org/articles/tetralogy-of-fallot|url-status=live|archive-url=https://web.archive.org/web/20120220221208/http://radiopaedia.org/articles/tetralogy-of-fallot|archive-date=2012-02-20|website=radiopaedia.org|date=17 October 2009 }}</ref> The boot like shape is due to the right ventricular hypertrophy present in TOF. Lung fields are often dark (absence of interstitial lung markings) due to decreased pulmonary blood flow.<ref name="Abdulla_20112">{{Cite book| vauthors = Abdulla R |title=Heart diseases in children : a pediatrician's guide |date=2011 |publisher=Springer |isbn=9781441979940 |location=New York|pages=169–70|oclc=719361786|name-list-style=vanc}}</ref>{{rp|171–172}}