title: Aortic regurgitation: ventricular response after aortic valve replacement.
abstract: This study was designed to evaluate the usefulness of the ratio of the preoperative regurgitant stroke volume to left ventricular end-diastolic volume (RSV/LVEDV) for assessing the left ventricular function preoperatively. In 26 patients with aortic regurgitation (AR), the percent decrease in LVEDV was compared with the preoperative RSV/LVEDV, ejection fraction (EF), LVEDV, left ventricular end-systolic volume (LVESV) or left ventricular end-diastolic pressure (LVEDP). There was a significant correlation between the percent decrease in LVEDV and RSV/LVEDV. Patients with RSV/LVEDV of more than 0.26 had a significantly smaller postoperative left ventricular end-diastolic volume index (LVEDVI) and left ventricular end-systolic volume index (LVESVI), and a greater postoperative EF than patients with smaller RSV/LVEDV. All but one patient with RSI/LVEDVI larger than 0.0016 LVEDVI had normal postoperative LVEDVI. Based on these findings, it is concluded that the RSV/LVEDV is an useful indicator for preoperative evaluation of left ventricular functions in patients with AR. Surgical intervention for patients with AR should be recommended before the RSI/LVEDVI drops to less than 0.0016 LVEDVI, to expect good postoperative ventricular responses.
authors.affiliation: Department of Thoracic and Cardiovascular Surgery, Tohoku University School of Medicine, Sendai.
authors.forename: K
authors.initials: K
authors.lastname: Tabayashi
authors.forename: M
authors.initials: M
authors.lastname: Sadahiro
authors.forename: G
authors.initials: G
authors.lastname: Yaginuma
authors.forename: Y
authors.initials: Y
authors.lastname: Ito
authors.forename: M
authors.initials: M
authors.lastname: Endo
authors.forename: K
authors.initials: K
authors.lastname: Akimoto
authors.forename: Y
authors.initials: Y
authors.lastname: Suzuki
authors.forename: H
authors.initials: H
authors.lastname: Mohri
mesh_terms: D000328:Adult; D000368:Aged; D001022:Aortic Valve Insufficiency / Q000503:physiopathology / Q000601:surgery*; D006801:Humans; D008875:Middle Aged; D011184:Postoperative Period; D013318:Stroke Volume / Q000502:physiology*