?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rft.title=Role+of+Adenosine%2FATP+Test+in+Supraventricular+Tachycardia&rft.creator=Francis%2C+Johnson&rft.subject=Indian+Pacing+and+Electrophysiology+Journal&rft.description=%0A%0A++++++++++++The+successful+treatment+of+paroxysmal+supraventricular+tachycardia+with+adenosine+5%60+triphosphate+(ATP)+was+initially+reported+by+Somlo1+in+1955.+Sharma+et+al2+noted+the+value+of+intravenous+ATP+in+the+diagnosis+and+management+of+wide+QRS+complex+tachycardia.+ATP+in+incremental+doses+has+been+used+for+the+non-invasive+diagnosis+of+concealed+accessory+pathways3.%0A%0A++++++++++++Non-invasive+diagnosis+of+dual+AV+node+physiology+(DAVNP)+in+patients+with+AV+nodal+reentrant+tachycardia+by+administration+of+ATP+or+adenosine+has+been+reported+by+different+authors4%2C5.+Though+many+of+the+studies+were+using+incremental+dosage%2C+single+dose+tests+with+ATP6+and+adenosine7+have+also+been+useful+in+the+diagnosis+of+DAVNP.+The+test+is+useful+in+sinus+rhythm+to+establish+the+presence+of+DAVNP.+DAVNP+is+considered+to+be+present+when+at+least+one+of+the+following+events+occur+following+ATP+injection%3A+1)+PR+interval+increases+or+decreases+by+%3E50+ms+in+2+consecutive+sinus+beats%3B+2)+an+AV+nodal+echo+beat+is+observed%3B+3)+AVNRT+develops.+In+this+issue+of+the+Journal%2C+Belhassen+et+al8+report+that+DAVNP+is+present+in+a+relatively+high+proportion+(36.5%25)+of+patients+following+termination+of+AVNRT+with+ATP+but+is+much+less+frequent+(5.5%25)+in+control+patients.+In+addition%2C+they+show+that+the+occurrence+of+DAVNP+following+the+administration+of+ATP+in+sinus+rhythm+is+a+good+predictor+of+its+occurrence+after+termination+of+AVNRT+with+ATP.+Thus%2C+findings+at+termination+of+tachycardia+by+ATP+may+be+useful+in+the+noninvasive+diagnosis+of+the+mechanism+of+a+paroxysmal+supraventricular+tachycardia.&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=2003-01&rft.type=Journal+(Paginated)&rft.type=PeerReviewed&rft.format=text%2Fhtml&rft.identifier=http%3A%2F%2Fcogprints.org%2F4290%2F1%2Ffrancis2.htm&rft.identifier=++Francis%2C+Johnson++(2003)+Role+of+Adenosine%2FATP+Test+in+Supraventricular+Tachycardia.++%5BJournal+(Paginated)%5D+++++&rft.relation=http%3A%2F%2Fcogprints.org%2F4290%2F