Fig. 1From: Catheter navigation by intracardiac echocardiography enables zero-fluoroscopy linear lesion formation and bidirectional cavotricuspid isthmus block in patients with typical atrial fluttera View of the right iliac vein and artery; b typical CTI view (white line); c diagnostic EP catheter placed on the CTI for entrainment manoeuvre; d visualisation of the coronary sinus ostium (RA = right atrium, LA = left atrium, CS = coronary sinus); e decapolar diagnostic catheter manoeuvered into the coronary sinus ostium; f diagnostic catheter (green arrow) placed in the coronary sinus (blue dashed line)Back to article page