?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rft.title=Tissue+Tracking+Imaging+for+Identifying+the+Origin+of+Idiopathic+Ventricular+Arrhythmias%3A+A+New+Role+of+Cardiac+Ultrasound+in+Electrophysiology&rft.creator=Roy+TN%2C+Sunil&rft.creator=Sankar%2C+Vikram&rft.creator=Francis%2C+Johnson&rft.creator=Tada%2C+Hiroshi&rft.subject=Indian+Pacing+and+Electrophysiology+Journal&rft.description=Several+strategies+for+mapping+ventricular+outflow+tract+tachycardia+have+been+reported+as+useful+indices+for+differentiating+between+those+originating+from+the+right+and+the+left+side.+Recently%2C+tissue+tracking+imaging+(TTI)+has+been+demonstrated+as+a+novel+non-invasive+modality+for+identifying+the+origin+of+outflow+tract+tachycardias.+Tissue+tracking+imaging+is+an+ultrasonographic+technique+that+measures+the+myocardial+motion+amplitude+towards+the+transducer+in+each+region+during+systole%2C+identifying+regional+myocardial+displacement+on+the+basis+of+myocardial+velocities+using+color+Doppler+myocardial+imaging+principles.+In+this+technique%2C+the+origin+of+the+arrhythmia+could+be+recognized+as+the+site+where+the+earliest+color-coded+signal+(ECCS)+appeared+on+the+myocardium+at+the+onset+of+the+systole.+In+preliminary+studies+this+modality+was+found+to+be+useful+in+differentiating+out+flow+tract+ventricular+tachycardias.+ECCS+was+always+found+below+or+at+the+level+of+the+pulmonary+valve+in+all+arrhythmias+which+could+be+ablated+from+the+right+ventricular+outflow+tract%2C+while+in+those+where+the+origin+was+above+the+pulmonary+valve+could+be+ablated+from+the+left+sinus+of+valsalva.+These+results+indicate+that+TTI+can+provide+detailed+and+accurate+information+on+the+arrhythmia+origin+of+OT-VT+and+may+be+useful+for+differentiating+between+an+OT-VT+originating+from+the+LV+epicardium+remote+from+the+LSV+and+that+from+the+LSV.+Newer+advances+in+echocardiographic+technologies+like+high+resolution%2C+high+frame+rate+real+time+three+dimensional+echocardiography+with+speckle+tracking+may+further+improve+the+precise+localization+of+arrhythmias+in+the+future.+%0A&rft.publisher=Indian+Pacing+and+Electrophysiology+Group&rft.contributor=Singh%2C+Balbir&rft.contributor=Lokhandwala%2C+Yash&rft.contributor=Francis%2C+Johnson&rft.contributor=Gupta%2C+Anup&rft.date=2005-07&rft.type=Journal+(Paginated)&rft.type=PeerReviewed&rft.format=text%2Fhtml&rft.identifier=http%3A%2F%2Fcogprints.org%2F4418%2F1%2Froy.htm&rft.format=application%2Fpdf&rft.identifier=http%3A%2F%2Fcogprints.org%2F4418%2F2%2Froy.pdf&rft.identifier=++Roy+TN%2C+Sunil+and+Sankar%2C+Vikram+and+Francis%2C+Johnson+and+Tada%2C+Hiroshi++(2005)+Tissue+Tracking+Imaging+for+Identifying+the+Origin+of+Idiopathic+Ventricular+Arrhythmias%3A+A+New+Role+of+Cardiac+Ultrasound+in+Electrophysiology.++%5BJournal+(Paginated)%5D+++++&rft.relation=http%3A%2F%2Fcogprints.org%2F4418%2F