{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,7,31]],"date-time":"2026-07-31T23:18:18Z","timestamp":1785539898802,"version":"3.56.0"},"reference-count":25,"publisher":"Ovid Technologies (Wolters Kluwer Health)","issue":"3","content-domain":{"domain":["www.ahajournals.org"],"crossmark-restriction":true},"short-container-title":["Circ: Arrhythmia and Electrophysiology"],"published-print":{"date-parts":[[2013,6]]},"abstract":"<jats:sec>\n            <jats:title>Background\u2014<\/jats:title>\n            <jats:p>Diagnosing atypical atrioventricular node-dependent long RP supraventricular tachycardias (SVTs) can be challenging.<\/jats:p>\n          <\/jats:sec>\n          <jats:sec>\n            <jats:title>Methods and Results\u2014<\/jats:title>\n            <jats:p>\n              Nineteen patients with 20 SVTs (atypical atrioventricular nodal reentrant tachycardia without [n=11]\/with [n=3] a bystander nodofascicular [NF] accessory pathway, orthodromic reciprocating tachycardia [ORT] using a decremental atrioventricular [permanent form of junctional reciprocating tachycardia; n=4] or NF [NF reentrant tachycardia; n=2]) accessory pathway underwent electrophysiological study. Postpacing interval (PPI)\u2013tachycardia cycle length (TCL), corrected PPI, \u2206VA (ventriculoatrial), \u2206HA (His-atrial), \u2206AH (atrio-His) values, and responses to His-refractory ventricular premature depolarizations were studied. Compared with atrioventricular nodal reentrant tachycardia, ORT patients were younger (42\u00b113 years versus 54\u00b119 years;\n              <jats:italic>P<\/jats:italic>\n              =0.036) and were women (5\/6 [83%] versus 3\/14 [21%];\n              <jats:italic>P<\/jats:italic>\n              =0.036); TCLs were similar (435 ms versus 429 ms; 95% confidence interval, \u221247.5 to 35.5). PPI\u2013TCL was shorter for ORT (118 ms versus 176 ms; 95% confidence interval, 26.3\u201389.7) but only 50% had PPI\u2013TCL &lt;115 ms, whereas 5 of 6 (83%) had PPI\u2013TCL &lt;125 ms (sensitivity, 83%; specificity, 100%). Corrected PPI &lt;110 ms, \u2206VA &lt;85 ms, and \u2206HA &lt;0 ms had equivalent sensitivity (67%) and 100% specificity for ORT. Compared with permanent form of junctional reciprocating tachycardia, NF reentrant tachycardia\/atrioventricular nodal reentrant tachycardia had longer \u2206AH (29 ms versus 10 ms; 95% confidence interval, 3.03\u201335.0) or AH\n              <jats:sub>(SVT)<\/jats:sub>\n              &lt;AH\n              <jats:sub>(NSR)<\/jats:sub>\n              (normal sinus rhythm) His-refractory ventricular premature depolarizations advanced (4\/8 [50%]), delayed (4\/8 [50%]), or terminated (5\/8 [63%]) SVT in all accessory pathway patients.\n            <\/jats:p>\n          <\/jats:sec>\n          <jats:sec>\n            <jats:title>Conclusions\u2014<\/jats:title>\n            <jats:p>\n              This unusual SVT requires separate maneuvers to delineate its upper and lower circuit. Standard entrainment criteria are modestly sensitive but highly specific for ORT; and PPI\u2013TCL of 125 ms seems better than 115 ms. The \u2206AH criteria, or paradoxically AH\n              <jats:sub>(SVT)<\/jats:sub>\n              &lt;AH\n              <jats:sub>(NSR)<\/jats:sub>\n              , differentiates NF reentrant tachycardia\/atrioventricular nodal reentrant tachycardia from permanent form of junctional reciprocating tachycardia. Bystander accessory pathways were only identified by His-refractory ventricular premature depolarizations.\n            <\/jats:p>\n          <\/jats:sec>","DOI":"10.1161\/circep.113.000187","type":"journal-article","created":{"date-parts":[[2013,4,30]],"date-time":"2013-04-30T04:22:17Z","timestamp":1367295737000},"page":"597-605","update-policy":"https:\/\/doi.org\/10.1161\/crossmarkpolicy","source":"Crossref","is-referenced-by-count":73,"title":["Electrophysiological Features Differentiating the Atypical Atrioventricular Node\u2013Dependent Long RP Supraventricular Tachycardias"],"prefix":"10.1161","volume":"6","author":[{"given":"Reginald T.","family":"Ho","sequence":"first","affiliation":[{"name":"From the Department of Medicine, Division of Cardiology, Thomas Jefferson University Hospital, Philadelphia, PA (R.T.H., D.R.F., B.B.P., A.J.G.); and Division of Cardiology, Our Lady of Lourdes Hospital, Camden, NJ (S.A.L.)."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Daniel R.","family":"Frisch","sequence":"additional","affiliation":[{"name":"From the Department of Medicine, Division of Cardiology, Thomas Jefferson University Hospital, Philadelphia, PA (R.T.H., D.R.F., B.B.P., A.J.G.); and Division of Cardiology, Our Lady of Lourdes Hospital, Camden, NJ (S.A.L.)."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Behzad B.","family":"Pavri","sequence":"additional","affiliation":[{"name":"From the Department of Medicine, Division of Cardiology, Thomas Jefferson University Hospital, Philadelphia, PA (R.T.H., D.R.F., B.B.P., A.J.G.); and Division of Cardiology, Our Lady of Lourdes Hospital, Camden, NJ (S.A.L.)."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Steven A.","family":"Levi","sequence":"additional","affiliation":[{"name":"From the Department of Medicine, Division of Cardiology, Thomas Jefferson University Hospital, Philadelphia, PA (R.T.H., D.R.F., B.B.P., A.J.G.); and Division of Cardiology, Our Lady of Lourdes Hospital, Camden, NJ (S.A.L.)."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Arnold J.","family":"Greenspon","sequence":"additional","affiliation":[{"name":"From the Department of Medicine, Division of Cardiology, Thomas Jefferson University Hospital, Philadelphia, PA (R.T.H., D.R.F., B.B.P., A.J.G.); and Division of Cardiology, Our Lady of Lourdes Hospital, Camden, NJ (S.A.L.)."}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"276","reference":[{"key":"e_1_3_2_2_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.hrthm.2010.11.037"},{"key":"e_1_3_2_3_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.hrthm.2011.09.054"},{"key":"e_1_3_2_4_2","article-title":"An Atypical Long RP Tachycardia: what is the mechanism?","author":"Ho RT","unstructured":"Ho RT, Levi SA. 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