Narrow Complex Tachycardias—Therapeutic and Diagnostic Role of Adenosine

Tachycardiomyopathy—The Eye Cannot See What the Mind Does Not Know

“…The role of adenosine can be diagnostic as well as therapeutic in SVT. 4 AT can be ruled out if tachycardia terminates with P wave in case of adenosine sensitive atrial ATs, or can be ruled in when tachycardia slows without termination or continues with AV block. 4 Various P-wave morphology-based algorithms are available to localize AT, but the simplified approach by Kistler et al 1 provides an accurate approach to localize the site.…”

“…4 AT can be ruled out if tachycardia terminates with P wave in case of adenosine sensitive atrial ATs, or can be ruled in when tachycardia slows without termination or continues with AV block. 4 Various P-wave morphology-based algorithms are available to localize AT, but the simplified approach by Kistler et al 1 provides an accurate approach to localize the site. P-wave morphology is considered sinus when findings are positive in leads I, II, III, aVL, aVF, V 2 to V 6 ; biphasic with initial positive followed by negative in lead V 1 and negative in lead aVR.…”

“…Surface ECGs can be difficult to distinguish, but certain clues point toward a specific cause. The role of adenosine can be diagnostic as well as therapeutic in SVT . AT can be ruled out if tachycardia terminates with P wave in case of adenosine sensitive atrial ATs, or can be ruled in when tachycardia slows without termination or continues with AV block …”