Catheter Ablation of Tachyarrhythmias From the Aortic Sinuses of Valsalva

Revisiting the Anatomy of the Living Heart

“…This anatomic feature explains well why these regions can be the focus of ventricular arrhythmias, which can then be treated by radiofrequency catheter ablation within the arterial valvar sinuses. 43 It is the differing morphology of the ventricular outflow tracts that explains the arrangement of the myocardial crescents within the arterial roots (Figures 5,7). In the right ventricle, with its free-standing infundibulum, crescents are found at the base of each valvar sinus.…”

Positive QRS Complex in Lead I as a Malignant Sign in Right Ventricular Outflow Tract Tachycardia

“…10 The electroanatomical voltage mapping was performed in 29 (32%) of 91 patients. To induce VA, programmed ventricular stimulation using up to 3 extrastimuli and incremental burst pacing at a cycle length of up to 2:1 ventricular or atrial capture were repeatedly performed from the right atrium and right ventricular apex.…”

Transthoracic Epicardial Catheter Ablation

“…2,8,12,13,20 If the VT is thought to originate from the superior aspect of the ventricle, the CS catheter is placed as distally as possible, usually at the junction of the great cardiac and anterior interventricular veins (Figure 4). 13,22 …”