{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,1,23]],"date-time":"2026-01-23T09:38:17Z","timestamp":1769161097237,"version":"3.49.0"},"reference-count":24,"publisher":"Wiley","issue":"12","license":[{"start":{"date-parts":[[2008,6,28]],"date-time":"2008-06-28T00:00:00Z","timestamp":1214611200000},"content-version":"vor","delay-in-days":2766,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Cardiovasc electrophysiol"],"published-print":{"date-parts":[[2000,12]]},"abstract":"<jats:p>LA Mechanical Function After Linear Lesions. <jats:italic>Introduction:<\/jats:italic> The extent of left atrial (LA) mechanical function recovery after creation of linear lesions using the loop catheter has not been determined.<\/jats:p><jats:p> <jats:italic>Methods and Results<\/jats:italic>: LA mechanical function was assessed before and after linear lesions using transthoracic two\u2010dimensional and Doppler echocardiography in two groups: (I) normal, which consisted of eight healthy dogs in normal sinus rhythm (NSR); and (2) atrial fibrillation (AF), which consisted of nine dogs in spontaneous AF for 6 months following rapid pacing\u2010induced AF. NSR was restored with linear lesions in all AF dogs. All animals were in NSR 5 months after linear lesions. In the normal dogs, the maximal velocity of the transmitral flow \u201cA\u201d wave was reduced by 42% during the first week postablation and by 24% at 5 months versus preablation. At 5 months, no differences in LA function were noted between the normal and the AF group for all measured Doppler parameters. At 5 months, the LA systolic area in AF dogs was reduced by 40% (preablation 12.9 \u00b1 2.9 cm<jats:sup>2<\/jats:sup>, postablation 7.6 \u00b1 1.2 cm<jats:sup>2<\/jats:sup>; P &lt; 0.01) and in the normal dogs by 21% (preablation 10.0 \u00b1 0.9 cm<jats:sup>2<\/jats:sup>, postablation 7.8 \u00b1 1.2 cm<jats:sup>2<\/jats:sup>; P &lt; 0.02), being the same in both groups within 3 months of recovery.<\/jats:p><jats:p> <jats:italic>Conclusion<\/jats:italic>: The creation of linear lesions with the loop catheter does not result in LA expansion. In normal dogs, LA mechanical activity is reduced for 3 weeks postablation. The time course of LA mechanical function recovery is the same for the AF and the NSR dogs, and it is complete at 3 months postablation. At 5 months, LA systolic function parameters in both groups are reduced by 24% versus the preablation values of the normal dogs. Linear lesions result in a significant reduction in LA size.<\/jats:p>","DOI":"10.1046\/j.1540-8167.2000.01397.x","type":"journal-article","created":{"date-parts":[[2003,8,13]],"date-time":"2003-08-13T14:20:37Z","timestamp":1060784437000},"page":"1397-1406","source":"Crossref","is-referenced-by-count":18,"title":["Time Course of Left Atrial Mechanical Recovery After Linear Lesions:"],"prefix":"10.1111","volume":"11","author":[{"given":"BOAZ","family":"AVITALL","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"ARVYDAS","family":"URBONAS","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"DALIA","family":"URBONIENE","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"SCOTT","family":"MILLARD","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"RAY","family":"HELMS","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"311","published-online":{"date-parts":[[2008,6,28]]},"reference":[{"key":"e_1_2_1_2_2","doi-asserted-by":"publisher","DOI":"10.1161\/01.CIR.96.5.1675"},{"key":"e_1_2_1_3_2","doi-asserted-by":"publisher","DOI":"10.1161\/01.CIR.97.12.1176"},{"key":"e_1_2_1_4_2","doi-asserted-by":"publisher","DOI":"10.1111\/j.1540-8167.1994.tb01146.x"},{"key":"e_1_2_1_5_2","doi-asserted-by":"publisher","DOI":"10.1161\/01.CIR.97.21.2136"},{"key":"e_1_2_1_6_2","doi-asserted-by":"publisher","DOI":"10.1016\/S0735-1097(98)00686-X"},{"key":"e_1_2_1_7_2","doi-asserted-by":"publisher","DOI":"10.1111\/j.1939-1676.1993.tb01015.x"},{"key":"e_1_2_1_8_2","first-page":"721","volume-title":"Principles and Practice of Echocardiography","author":"Choong CY","year":"1994"},{"key":"e_1_2_1_9_2","doi-asserted-by":"crossref","first-page":"760","DOI":"10.1161\/01.CIR.60.4.760","article-title":"Assessment of left ventricular ejection fraction and volumes by real\u2010time, two\u2010dimensional echocardiography, A comparison of cineangiographic and radionuclide techniques","volume":"60","author":"Folland ED","year":"1979","journal-title":"Circulation"},{"key":"e_1_2_1_10_2","first-page":"127","volume-title":"Echocardiography","author":"Feigenbaum H","year":"1986"},{"key":"e_1_2_1_11_2","doi-asserted-by":"publisher","DOI":"10.1016\/S0894-7317(97)80010-7"},{"key":"e_1_2_1_12_2","doi-asserted-by":"publisher","DOI":"10.1016\/S0735-1097(83)80313-1"},{"issue":"4","key":"e_1_2_1_13_2","first-page":"H1093","article-title":"Effects of atrial fibrillation on left and right atrial dimensions, pressures, and compliances","volume":"1264","author":"Leistad E","year":"1993","journal-title":"Am J Physiol"},{"key":"e_1_2_1_14_2","doi-asserted-by":"crossref","first-page":"792","DOI":"10.1161\/01.CIR.82.3.792","article-title":"Atrial enlargement as a consequence of atrial fibrillation. 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