{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,5,3]],"date-time":"2026-05-03T01:12:40Z","timestamp":1777770760383,"version":"3.51.4"},"reference-count":0,"publisher":"S. Karger AG","license":[{"start":{"date-parts":[[2008,11,19]],"date-time":"2008-11-19T00:00:00Z","timestamp":1227052800000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/karger.com\/pages\/terms-and-conditions"},{"start":{"date-parts":[[2008,11,19]],"date-time":"2008-11-19T00:00:00Z","timestamp":1227052800000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/karger.com\/pages\/terms-and-conditions"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Cardiology"],"abstract":"<jats:p>There are controversies regarding the possibility of returning of A wave (mitral flow at left atrial contraction) after electroconversion (EC) in patients with persisting chronic atrial fibrillation in spite of successful surgical treatment of mitral valve disease. Twenty-four hours before successful EC, thereafter daily for 1 week and then on the 14th, 21st and 28th day and 6 months after EC, ECG, M-mode, two-dimensional and Doppler echocardiography were performed in 55 patients. A wave ( &gt; 0.1 m\/s) appeared on the 1st day in 31 patients, on the 2nd day in the next 6, on the 3rd in 5 patients, on the 4th and 5th days in 1 patient and on the 7th day in 4 patients. In 7 patients A wave did not restore. Maximum velocity of A wave increased from 0.48 \u00b1 0.22 to 0.86 \u00b1 0.28 m\/s (p &lt; 0.05) during the follow-up. In 92% of patiens with A wave 24 h after EC, significant increases in stroke index from 35 \u00b1 12 to 47 \u00b1 15 ml\/m2 (p &lt; 0.04), ejection fraction from 46 \u00b1 9 to 55 \u00b1 8% (p &lt; 0.01) and pulmonary acceleration time from 94 \u00b1 26 to 107 \u00b1 22 ms (p &lt; 0.05) were observed. Sinus rhythm was still present on the 28th day in 34 patients (62%) and after 6 months in 31 patients (57%), all of them with A wave, observation shows the increase in pulmonary acceleration time, the decrease in the left atrial area and the increase in its systolic function in patients with A wave. Appearance of A wave determined the hemodynamic improvement, but we did not observe a correlation between maximal velocity of A wave and hemodynamic improvement. Appearance of A wave had a low predictive value for maintaining sinus rhythm (sensitivity 58% and specificity 45%). Relative increase in A wave velocity during the 1st week after EC correlated positively with long-term maintenance of sinus rhythm (r = 0.62; p &lt; 0.001).<\/jats:p>","DOI":"10.1159\/000177070","type":"journal-article","created":{"date-parts":[[2008,11,21]],"date-time":"2008-11-21T07:02:29Z","timestamp":1227250949000},"page":"98-103","source":"Crossref","is-referenced-by-count":1,"title":["Restoration of Mechanical Atrial Function after Electrical Cardioversion of Chronic Atrial Fibrillation in Patients after Surgical Treatment of Mitral Valve Disease \u2013 Hemodynamic Effects and Prognostic Value of Maintenance of Sinus Rhythm"],"prefix":"10.1159","author":[{"given":"Andrzej","family":"Szyszka","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Olga","family":"Trojnarska","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Lech","family":"Paluszkiewicz","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Andrzej","family":"Cie\u015bli\u0144ski","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Aleksy","family":"Poni\u017cy\u0144ski","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"127","published-online":{"date-parts":[[2008,11,19]]},"container-title":["Cardiology"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/karger.com\/article-pdf\/doi\/10.1159\/000177070","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2026,4,29]],"date-time":"2026-04-29T16:39:57Z","timestamp":1777480797000},"score":1,"resource":{"primary":{"URL":"https:\/\/karger.com\/article\/doi\/10.1159\/000177070"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2008,11,19]]},"references-count":0,"URL":"https:\/\/doi.org\/10.1159\/000177070","archive":["Portico"],"relation":{},"ISSN":["0008-6312","1421-9751"],"issn-type":[{"value":"0008-6312","type":"print"},{"value":"1421-9751","type":"electronic"}],"subject":[],"published":{"date-parts":[[2008,11,19]]}}}