Figure 2From: Preventing complicated transseptal puncture with intracardiac echocardiography: case reportICE during atrial systole before the jump of the transseptal needle into the oval fossa. The LA cavity is virtually missing at this time point of the cardiac cycle. Ao – non-coronary sinus of the aorta; CT – terminal crest; FO – oval fossa; RA – right atrium; RV – right ventricle.Back to article page