This Article Figures Only Full Text Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Services Email this article to a friend Similar articles in this journal Similar articles in PubMed Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via HighWire Citing Articles via Google Scholar Google Scholar Articles by Sparks, P. B. Articles by Kalman, J. M. Search for Related Content PubMed PubMed Citation Articles by Sparks, P. B. Articles by Kalman, J. M.

CLINICAL STUDIES

Left atrial "stunning" following radiofrequency catheter ablation of chronic atrial flutter

^a Department of Cardiology, The Royal Melbourne Hospital, and Department of Medicine, The University of Melbourne, Parkville, Victoria, Australia

Manuscript received January 8, 1998; revised manuscript received April 3, 1998, accepted April 27, 1998.

Address for correspondence: Dr. Jonathan M. Kalman, Department of Cardiology, The Royal Melbourne Hospital, Parkville, Victoria, 3050, Australia
jon.kalman{at}whcn.org.au

Objectives. This study examined the effect of radiofrequency ablation (RFA) on left atrial (LA) and left atrial appendage (LAA) function in humans with chronic atrial flutter (AFL).

Background. Atrial stunning and the development of spontaneous echocardiographic contrast (SEC) is a consequence of electrical cardioversion of AFL to sinus rhythm. This phenomenon has been termed "stunning" and is associated with thrombus formation and embolic stroke. Radiofrequency ablation is now considered to be definitive treatment for chronic AFL, but whether this procedure is complicated by LA stunning is unknown.

Methods. Fifteen patients with chronic AFL undergoing curative RFA underwent transesophageal echocardiography to evaluate LA and LAA function and SEC before and immediately, 30 minutes and 3 weeks after RFA. To control for possible direct effects of RFA on atrial function, seven patients undergoing RFA for paroxysmal AFL were also studied. In this group, RF energy was delivered in sinus rhythm and echocardiographic parameters were assessed before and immediately and 30 minutes following RFA.

Results. Chronic AFL: Mean arrhythmia duration was 17.2 ± 13.3 months. Twelve patients (80%) developed SEC following RF energy application and reversion to sinus rhythm. LAA velocities decreased significantly from 54.0 ± 14.2 cm/s in AFL to 18.0 ± 7.1 cm/s in sinus rhythm after arrhythmia termination (p < 0.01). These changes persisted for 30 minutes. Following 3 weeks of sustained sinus rhythm, significant improvements in LAA velocities (68.9 ± 23.6 vs. 18.0 ± 7.1 cm/s, p < 0.01) and mitral A-wave velocities (49.8 ± 10.3 vs. 13.4 ± 11.2 cm/s, p < 0.01) were evident and SEC had resolved in all patients. Paroxysmal AFL: Radiofrequency energy delivered in sinus rhythm had no significant effect on any of the above indexes of LA or LAA function and no patient developed SEC following RFA.

Conclusions. Radiofrequency ablation of chronic AFL is associated with significant LA stunning and the development of SEC. Left atrial stunning is not secondary to the RF energy application itself. Sustained sinus rhythm for 3 weeks leads to resolution of these acute phenomena. Left atrial stunning occurs in the absence of direct current shock or antiarrhythmic drugs, suggesting that its mechanism may be a function of the preceding arrhythmia rather than the mode of reversion.

Abbreviations and Acronyms   AFL = atrial flutter   DC = direct current   ECG = electrocardiographic, electrocardiography   FAC = fractional area change   LA = left atrial   LAA = left atrial appendage   RF = radiofrequency   RFA = radiofrequency ablation   SEC = spontaneous echocardiographic contrast   TEE = transesophageal echocardiography

This article has been cited by other articles:

				J. J. Blanc, J. Almendral, M. Brignole, M. Fatemi, K. Gjesdal, E. Gonzalez-Torrecilla, P. Kulakowski, G. Y.H. Lip, D. Shah, C. Wolpert, et al. Consensus document on antithrombotic therapy in the setting of electrophysiological procedures Europace, May 1, 2008; 10(5): 513 - 527. [Full Text] [PDF]

				S. Carasso, R. Kuperstein, E. Konen, M. Glikson, and M. S. Feinberg Plowing the atrium and growing thrombi: Two cases of large atrial thrombi following ablative and surgical procedure for atrial fibrillation Eur J Echocardiogr, October 1, 2006; 7(5): 383 - 386. [Abstract] [Full Text] [PDF]

				Writing Committee Members, V. Fuster, L. E. Ryden, D. S. Cannom, H. J. Crijns, A. B. Curtis, K. A. Ellenbogen, J. L. Halperin, J.-Y. Le Heuzey, G. N. Kay, et al. ACC/AHA/ESC 2006 guidelines for the management of patients with atrial fibrillation: full text: A report of the American College of Cardiology/American Heart Association Task Force on practice guidelines and the European Society of Cardiology Committee for Practice Guidelines (Writing Committee to Revise the 2001 Guidelines for the Management of Patients With Atrial Fibrillation) Developed in collaboration with the European Heart Rhythm Association and the Heart Rhythm Society Europace, September 1, 2006; 8(9): 651 - 745. [Full Text] [PDF]

				V. Fuster, L. E. Ryden, D. S. Cannom, H. J. Crijns, A. B. Curtis, K. A. Ellenbogen, J. L. Halperin, J.-Y. Le Heuzey, G. N. Kay, J. E. Lowe, et al. ACC/AHA/ESC 2006 Guidelines for the Management of Patients With Atrial Fibrillation--Executive Summary: A Report of the American College of Cardiology/American Heart Association Task Force on Practice Guidelines and the European Society of Cardiology Committee for Practice Guidelines (Writing Committee to Revise the 2001 Guidelines for the Management of Patients With Atrial Fibrillation) Developed in Collaboration With the European Heart Rhythm Association and the Heart Rhythm Society J. Am. Coll. Cardiol., August 15, 2006; 48(4): 854 - 906. [Full Text] [PDF]

				V. Fuster, L. E. Ryden, D. S. Cannom, H. J. Crijns, A. B. Curtis, K. A. Ellenbogen, J. L. Halperin, J.-Y. Le Heuzey, G. N. Kay, J. E. Lowe, et al. ACC/AHA/ESC 2006 Guidelines for the Management of Patients With Atrial Fibrillation: A Report of the American College of Cardiology/American Heart Association Task Force on Practice Guidelines and the European Society of Cardiology Committee for Practice Guidelines (Writing Committee to Revise the 2001 Guidelines for the Management of Patients With Atrial Fibrillation) Developed in Collaboration With the European Heart Rhythm Association and the Heart Rhythm Society J. Am. Coll. Cardiol., August 15, 2006; 48(4): e149 - e246. [Full Text] [PDF]

				V. Fuster, L. E. Ryden, D. S. Cannom, H. J. Crijns, A. B. Curtis, K. A. Ellenbogen, J. L. Halperin, J.-Y. Le Heuzey, G. N. Kay, J. E. Lowe, et al. ACC/AHA/ESC 2006 Guidelines for the Management of Patients With Atrial Fibrillation: A Report of the American College of Cardiology/American Heart Association Task Force on Practice Guidelines and the European Society of Cardiology Committee for Practice Guidelines (Writing Committee to Revise the 2001 Guidelines for the Management of Patients With Atrial Fibrillation): Developed in Collaboration With the European Heart Rhythm Association and the Heart Rhythm Society Circulation, August 15, 2006; 114(7): e257 - e354. [Full Text] [PDF]

				V. Fuster, L. E. Ryden, D. S. Cannom, H. J. Crijns, A. B. Curtis, K. A. Ellenbogen, J. L. Halperin, J.-Y. Le Heuzey, G. N. Kay, J. E. Lowe, et al. ACC/AHA/ESC 2006 Guidelines for the Management of Patients With Atrial Fibrillation--Executive Summary: A Report of the American College of Cardiology/American Heart Association Task Force on Practice Guidelines and the European Society of Cardiology Committee for Practice Guidelines (Writing Committee to Revise the 2001 Guidelines for the Management of Patients With Atrial Fibrillation): Developed in Collaboration With the European Heart Rhythm Association and the Heart Rhythm Society Circulation, August 15, 2006; 114(7): 700 - 752. [Full Text] [PDF]

				Authors/Task Force Members, V. Fuster, L. E. Ryden, D. S. Cannom, H. J. Crijns, A. B. Curtis, K. A. Ellenbogen, J. L. Halperin, J.-Y. Le Heuzey, G. N. Kay, et al. ACC/AHA/ESC 2006 guidelines for the management of patients with atrial fibrillation executive summary: A report of the American College of Cardiology/American Heart Association Task Force on practice guidelines and the European Society of Cardiology Committee for Practice Guidelines (Writing Committee to Revise the 2001 Guidelines for the Management of Patients with Atrial Fibrillation) Developed in collaboration with the European Heart Rhythm Association and the Heart Rhythm Society Eur. Heart J., August 2, 2006; 27(16): 1979 - 2030. [Full Text] [PDF]

				M. F. Scholten, A. S. Thornton, J. M. Mekel, P. J. Koudstaal, and L. J. Jordaens Anticoagulation in atrial fibrillation and flutter Europace, January 1, 2005; 7(5): 492 - 499. [Abstract] [Full Text] [PDF]

				Committee Members, C. Blomstrom-Lundqvist, M. M. Scheinman, E. M. Aliot, J. S. Alpert, H. Calkins, A. J. Camm, W. B. Campbell, D. E. Haines, K. H. Kuck, et al. ACC/AHA/ESC guidelines for the management of patients with supraventricular arrhythmias --executive summary: a report of the American college of cardiology/American heart association task force on practice guidelines and the European society of cardiology committee for practice guidelines (writing committee to develop guidelines for the management of patients with supraventricular arrhythmias) Developed in Collaboration with NASPE-Heart Rhythm Society J. Am. Coll. Cardiol., October 15, 2003; 42(8): 1493 - 1531. [Full Text] [PDF]

				C. Blomstrom-Lundqvist, M. M. Scheinman, E. M. Aliot, J. S. Alpert, H. Calkins, A. J. Camm, W. B. Campbell, D. E. Haines, K. H. Kuck, B. B. Lerman, et al. ACC/AHA/ESC Guidelines for the Management of Patients With Supraventricular Arrhythmias*--Executive Summary: A Report of the American College of Cardiology/American Heart Association Task Force on Practice Guidelines and the European Society of Cardiology Committee for Practice Guidelines (Writing Committee to Develop Guidelines for the Management of Patients With Supraventricular Arrhythmias) Circulation, October 14, 2003; 108(15): 1871 - 1909. [Full Text] [PDF]

				Committee Members, C. Blomstrom-Lundqvist, M. M Scheinman, E. M Aliot, J. S Alpert, H. Calkins, A.J. Camm, W.B. Campbell, D. E Haines, K. H Kuck, et al. ACC/AHA/ESC guidelines for the management of patients with supraventricular arrhythmias--executive summary: A Report of the American College of Cardiology/American HeartAssociation Task Force on Practice Guidelines and the European Society of Cardiology Committee for Practice Guidelines(Writing Committee to Develop Guidelines for the Management of Patients With Supraventricular Arrhythmias)Developed in collaboration with NASPE-Heart Rhythm Society Eur. Heart J., October 2, 2003; 24(20): 1857 - 1897. [Full Text] [PDF]

				S. Schmieder, G. Ndrepepa, J. Dong, B. Zrenner, J. Schreieck, M. A.E. Schneider, M. R. Karch, and C. Schmitt Acute and long-term results of radiofrequency ablation of common atrial flutter and the influence of the right atrial isthmus ablation on the occurrence of atrial fibrillation Eur. Heart J., May 2, 2003; 24(10): 956 - 962. [Abstract] [Full Text] [PDF]

				P. Sanders, J. B. Morton, J. G. Morgan, N. C. Davidson, S. J. Spence, J. K. Vohra, J. M. Kalman, and P. B. Sparks Reversal of Atrial Mechanical Stunning After Cardioversion of Atrial Arrhythmias: Implications for the Mechanisms of Tachycardia-Mediated Atrial Cardiomyopathy Circulation, October 1, 2002; 106(14): 1806 - 1813. [Abstract] [Full Text] [PDF]

				B. Olshansky High intensity anticoagulation for cardioversion of atrial arrhythmias? The shocking truth J. Am. Coll. Cardiol., September 4, 2002; 40(5): 934 - 936. [Full Text] [PDF]

				V. Fuster, L. E. Ryden, R. W. Asinger, D. S. Cannom, H. J. Crijns, R. L. Frye, J. L. Halperin, G. N. Kay, W. W. Klein, S. Levy, et al. ACC/AHA/ESC Guidelines for the Management of Patients With Atrial Fibrillation: Executive Summary A Report of the American College of Cardiology/American Heart Association Task Force on Practice Guidelines and the European Society of Cardiology Committee for Practice Guidelines and Policy Conferences (Committee to Develop Guidelines for the Management of Patients With Atrial Fibrillation) Developed in Collaboration With the North American Society of Pacing and Electrophysiology Circulation, October 23, 2001; 104(17): 2118 - 2150. [Full Text] [PDF]

				Guidelines for the management of patients with atrial fibrillation. A report of the American College of Cardiology/American Heart Association Task Force on Practice Guidelines and the European Society of Cardiology Committee for Practice Guidelines and Policy Conferences (Committee to develop guidelines for the management of patients with atrial fibrillation) developed in collaboration with the North American Society of Pacing and Electrophysiology Eur. Heart J., October 2, 2001; 22(20): 1852 - 1923. [PDF]

				V. Fuster, L. E. Ryden, R. W. Asinger, D. S. Cannom, H. J. Crijns, R. L. Frye, J. L. Halperin, G. N. Kay, W. W. Klein, S. Levy, et al. ACC/AHA/ESC guidelines for the management of patients with atrial fibrillation: executive summary: A Report of the American College of Cardiology/ American Heart Association Task Force on Practice Guidelines and the European Society of Cardiology Committee for Practice Guidelines and Policy Conferences (Committee to Develop Guidelines for the Management of Patients With Atrial Fibrillation) Developed in Collaboration With the North American Society of Pacing and Electrophysiology J. Am. Coll. Cardiol., October 1, 2001; 38(4): 1231 - 1265. [Full Text] [PDF]

				V. Fuster, L. E. Ryden, R. W. Asinger, D. S. Cannom, H. J. Crijns, R. L. Frye, J. L. Halperin, G. N. Kay, W. W. Klein, S. Levy, et al. ACC/AHA/ESC guidelines for the management of patients with atrial fibrillation: A report of the American College of Cardiology/American Heart Association Task Force on Practice Guidelines and the European Society of Cardiology Committee for Practice Guidelines and Policy Conferences (Committee to Develop Guidelines for the Management of Patients With Atrial Fibrillation) Developed in Collaboration With the North American Society of Pacing and Electrophysiology J. Am. Coll. Cardiol., October 1, 2001; 38(4): 1266 - 1266. [Full Text] [PDF]

				H. Schmidt, G. von der Recke, S. Illien, T. Lewalter, R. Schimpf, C. Wolpert, H. Becher, B. Luderitz, and H. Omran Prevalence of left atrial chamber and appendage thrombi in patients with atrial flutter and its clinical significance J. Am. Coll. Cardiol., September 1, 2001; 38(3): 778 - 784. [Abstract] [Full Text] [PDF]

				P. B. Sparks and J. M. Kalman Is atrial flutter a risk factor for stroke? J. Am. Coll. Cardiol., September 1, 2001; 38(3): 785 - 788. [Full Text] [PDF]

				G Corrado, A Sgalambro, A Mantero, F Gentile, M Gasparini, R Bufalino, A Morabito, G Trocino, R Schiavina, S Mandorla, et al. Thromboembolic risk in atrial flutter. The FLASIEC (FLutterAtrialeSocietaIaliana diEcografiaCardiovascolare) multicentre study Eur. Heart J., June 2, 2001; 22(12): 1042 - 1051. [Abstract] [PDF]

				C. Stefanadis, J. Dernellis, and P. Toutouzas A clinical appraisal of left atrial function Eur. Heart J., January 1, 2001; 22(1): 22 - 36. [PDF]

				Y. Agmon, B. K. Khandheria, F. Gentile, and J. B. Seward Echocardiographic assessment of the left atrial appendage J. Am. Coll. Cardiol., December 1, 1999; 34(7): 1867 - 1877. [Abstract] [Full Text] [PDF]

				P. B. Sparks, H. G. Mond, J. K. Vohra, A. G. Yapanis, L. E. Grigg, and J. M. Kalman Mechanical Remodeling of the Left Atrium After Loss of Atrioventricular Synchrony : A Long-Term Study in Humans Circulation, October 19, 1999; 100(16): 1714 - 1721. [Abstract] [Full Text] [PDF]

				P. B. Sparks, S. Jayaprakash, H. G. Mond, J. K. Vohra, L. E. Grigg, and J. M. Kalman Left atrial mechanical function after brief duration atrial fibrillation J. Am. Coll. Cardiol., February 1, 1999; 33(2): 342 - 349. [Abstract] [Full Text] [PDF]