Left ventricular mass regression early after aortic valve replacement
Autor: | Vivek Rao, Jeri Sever, Christopher D. Morgan, Stephen E. Fremes, George T. Christakis, Karen J. Buth, Campbell D. Joyner, Patricia M. Murphy, Kostas P. Panagiotopoulos, Bernard S. Goldman |
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Rok vydání: | 1996 |
Předmět: |
Male
Pulmonary and Respiratory Medicine Aortic valve medicine.medical_specialty medicine.medical_treatment Heart Valve Diseases Left ventricular hypertrophy Prosthesis Muscle hypertrophy Left ventricular mass Aortic valve replacement Internal medicine medicine Humans Aged Bioprosthesis business.industry Middle Aged medicine.disease Surgery medicine.anatomical_structure Echocardiography Aortic Valve Heart Valve Prosthesis cardiovascular system Ventricular pressure Cardiology Female Hypertrophy Left Ventricular Cardiology and Cardiovascular Medicine business Artery |
Zdroj: | The Annals of Thoracic Surgery. 62:1084-1089 |
ISSN: | 0003-4975 |
DOI: | 10.1016/0003-4975(96)00533-4 |
Popis: | Background. Regression of left ventricular hypertrophy is an important and well-recognized salutary effect of aortic valve replacement. The earliest evidence of left ventricular mass regression after aortic valve replacement and the influence of prosthesis type are not well known, and were the focus of this study. Methods. Transthoracic echocardiography was used to measure left ventricular mass index preoperatively and before discharge in 57 consecutive patients undergoing isolated aortic valve replacement (with or without coronary artery bypass grafting). Results. Three patients were excluded from the study because of inability to obtain accurate M-mode echocardiographic images for left ventricular mass measurement preoperatively (1) or postoperatively (2). Of the remaining 54 patients, mechanical bileaflet valves were used in 19, stented tissue bioprostheses were implanted in 15, and a stentless porcine bioprosthesis was chosen for 20. Postoperative echocardiograms were obtained 4.9 ± 2.3 days after aortic valve replacement (range, 2 to 9 days). A two-way repeated-measures analysis of variance demonstrated a significant reduction of left ventricular mass index before discharge (preoperative 141.4 ± 45.2 g/m 2 , postoperative 127.5 ± 32.8 g/m 2 ; p = 0.0005) but no differences between prostheses. Conclusions. Left ventricular mass regression begins early after aortic valve replacement, probably because of reduction of transvalvular gradients and left ventricular wall stress. At least in the very early postoperative period, the type of prosthesis does not influence the extent of mass regression. |
Databáze: | OpenAIRE |
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