Electrophysiological mapping and ablation
A series of mapping and ablation
parameters of successful ablated DGCV-AIV VAs by NS approach and by SS
approach were also compared.There were no significant differences in the
local ventricular activation time relative to the QRS onset (V-QRS),
ventricular capture ratio, pace-match leads, procedure time, RF
duration, numbers of RF lesions and fluoroscopy time. The operation time
in coronary venous system by SS
approach was slightly longer than by NS approach,shown inTable2 .
Complications during the procedure by NS approach and SS approach were
also compared. There were no significant differences in occurrence of
complications between these two groups (4/123, 3.25% vs 7/79, 8.86%,
p>0.05). Via SS approach, coronary vein dissection happened
on 3 patients and coronary vein rupture happened on 2 patient. The two
patients of coronary vein rupture developed cardiac tamponade, but
turned hemodynamic stable post emergent pericardiocentesis. One patient
has severe chest pain with CAG showing an acute irreversible 50%
coronary stenosis in LAD, another patient had an episode of chest
tightness, and coronary angiography revealed coronary spasm of LCx, and
relieved by intravenous nitroglycerin. By NS approach, coronary vein
dissection happened on 2 patients and coronary vein rupture occurred on
one patient. Coronary vein rupture caused delayed pericardial effusion
but without unstable hemodynamics, thus pericardiocentesis was not
performed. Coronary spasm occurred on 1 patient but relieved by
intravenous nitroglycerin, shown in Table4 .