{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,12]],"date-time":"2025-10-12T06:07:34Z","timestamp":1760249254308},"reference-count":0,"publisher":"Ovid Technologies (Wolters Kluwer Health)","issue":"5","content-domain":{"domain":["www.ahajournals.org"],"crossmark-restriction":true},"short-container-title":["Circulation"],"published-print":{"date-parts":[[1983,11]]},"abstract":"<jats:p>Septal and lateral wall motion and septal thickening were evaluated with quantitative two-dimensional echocardiography in 20 patients who underwent cardiac surgery without complications. Postoperative mean ejection fraction (48 +\/- 10%) measured by radionuclide ventriculography was unchanged from the preoperative value (45 +\/- 8%). Mean postoperative systolic thickening of the septum (33 +\/- 15%) was also unchanged from the preoperative value (26 +\/- 10%). However, septal endocardial motion as measured by an external frame-of-reference (fixed-axis) system fell from a 22 +\/- 10% mean percent shortening (MPS) of septal radii to a postoperative value of -8 +\/- 15% (p less than .001). Fixed-axis analysis also led to an increase in MPS of lateral radii: preoperative 16 +\/- 5%; postoperative 28 +\/- 9% (p less than .001). With an internal frame-of-reference (floating-axis) system, which compensates for the effects of translation and rotation on wall motion, postoperative MPS of septal radii (22 +\/- 10%) was unchanged from preoperative MPS (25 +\/- 8%; p = NS). Similarly, MPS of lateral wall radii was unchanged (preoperative, 15 +\/- 5%; postoperative, 12 +\/- 5%; p = NS). Thus systolic translation of the ventricle accounts for abnormal postoperative septal motion seen in a fixed-axis system and can be corrected by a floating-axis system. These data have important implications for the noninvasive evaluation of regional wall motion after cardiac surgery. Systems using a fixed external frame of reference such as radionuclide ventriculography are prone to systematic error. A combination of systolic thickening analysis by two-dimensional echocardiography and analysis of endocardial motion by the floating-axis system is a more appropriate method for evaluating the effects of cardiac surgery on regional left ventricular function.<\/jats:p>","DOI":"10.1161\/01.cir.68.5.1013","type":"journal-article","created":{"date-parts":[[2011,6,17]],"date-time":"2011-06-17T20:29:13Z","timestamp":1308342553000},"page":"1013-1020","update-policy":"http:\/\/dx.doi.org\/10.1161\/crossmarkpolicy","source":"Crossref","is-referenced-by-count":51,"title":["Quantitative two-dimensional echocardiographic analysis of motion and thickening of the interventricular septum after cardiac surgery."],"prefix":"10.1161","volume":"68","author":[{"given":"T","family":"Force","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"P","family":"Bloomfield","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"J E","family":"O'Boyle","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"D A","family":"Pietro","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"R W","family":"Dunlap","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"S F","family":"Khuri","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"A F","family":"Parisi","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"276","container-title":["Circulation"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.ahajournals.org\/doi\/pdf\/10.1161\/01.CIR.68.5.1013","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2024,5,12]],"date-time":"2024-05-12T15:10:37Z","timestamp":1715526637000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.ahajournals.org\/doi\/10.1161\/01.CIR.68.5.1013"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[1983,11]]},"references-count":0,"journal-issue":{"issue":"5","published-print":{"date-parts":[[1983,11]]}},"alternative-id":["10.1161\/01.CIR.68.5.1013"],"URL":"https:\/\/doi.org\/10.1161\/01.cir.68.5.1013","relation":{},"ISSN":["0009-7322","1524-4539"],"issn-type":[{"value":"0009-7322","type":"print"},{"value":"1524-4539","type":"electronic"}],"subject":[],"published":{"date-parts":[[1983,11]]},"assertion":[{"value":"1983-11-01","order":2,"name":"published","label":"Published","group":{"name":"publication_history","label":"Publication History"}}]}}