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Relationship between left atrial diameter and cardiac function in myocardial infarction:assessment of left ventricular end-diastolic pressure by the left atrial index Toshiyuki Ishikawa 1 , Masanobu Kashiwagi 1 , Takasi Usui 1 , Hisao Ochiai 1 , Yasuo Tokita 1 , Yasuo Ohyama 1 1Division of Cardiology, Department of Internal Medicine, Fujisawa City Hospital pp.657-661
Published Date 1989/6/15
DOI https://doi.org/10.11477/mf.1404205494

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  • Abstract
  • Look Inside

To study the assessment of cardiac function in acute myocardial infarction (AMI), we measured left atrial diameter, left ventricular end-diastolic pressure (LVEDP), pulmonary capillary wedge pressure (PCWP), ejection fraction (EF) in 20 patients with acute myocardial infarction. Left atrial diameter wasmeasured using echocardiography and was expressed as left atrial index (LAI, mm/m2) dividing by body surface area.

LAI in AMI was 21.3±2.7 mm/m2 and significantly larger than LAI in normal subject (19.9±2.0 mm/m2) (p<0.05), In AMI, LVEDP was 13.3±3.4 mmHg, PCWP was 9.0± 2.8 mmHg and EF was 52.3± 14.8%, Relationship (r value) between LAI and LVEDP (r = 0.70, p<0.001, y 0.87 x-5.4 x; LAI, y ; LVEDP) was greater than PCWP and LVEDP (r = 0.60, p <0.01).LVEDP calculated from LAI using this method was directly measured LVEDP directly measured-J:2.4 mmHg.In 9 patients, LAI was larger than 20.9 mm/m2, in 8 patients of them LVEDP was higher than 13 mmHg.In 11 patients LAI was smaller than 20.9 mmHg, only in 2 of them LVEDP was lower than 13 mmHg.It concluded that sen-sitivity was 88.9%, specificity was 81.8%, accuracy was 85.0%.Relationship between LAI and PCWP (r = 0.30), LAI and EF (r=0.36) were not sig-nificant.We can measure LAI repeatedly in AMI non-invasively, and predict LVEDP.Thus, the mea-surement of LAI is useful in treatment of AMI.


Copyright © 1989, Igaku-Shoin Ltd. All rights reserved.

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電子版ISSN 1882-1200 印刷版ISSN 0452-3458 医学書院

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