<prompt> Answer this question truthfullyWhat is an electrocardiogram for patent foramen ovale?  <response>: <reason> Findings on ECG that may be seen in patients with patent foramen ovale include: Crochetage pattern: An M-shaped bifid notch on the ascending branch, or on the zenith, of the R wave in inferior ECG leads II, III, aVF. Right bundle branch block RBBB P wave abnormalities 