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Booster pump function of the left atrium in hypertensive patients Takeshi Arita 1 , Ken Ishida 1 , Youji Handa 1 , Kenji Ishine 1 , Toshio Ohya 2 , Nobuhiro Ohta 1 1Second Department of InternaI Medicine, Shimane Prefectural Central Hospital 2Department of Radiology, Shimane Prefectural Central Hospital pp.879-883
Published Date 1987/8/15
DOI https://doi.org/10.11477/mf.1404205108
  • Abstract
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We evaluated the left atrial function in 45 hyperten-sive patients using echocardiography and the backward method of ECG-gated equilibrium radionuclide angio-cardiography. The following parameters were mea-sured : 1) AV/EDV= (LV volume at end-diastole-LV volume at the beginning of atrial contraction)/LV volume at end-diastole (in LV echocardiogram) 2) peak AF rate=maximum dv/dt in atrial filling________________________________end-diastolic counts

(in RI angiocardiography) 3) A dip : the depth from the beginning of active atrial shortening (in inter-atrial septal echocardiogram obtained with right subcostal approach) 4) LAD' : the left atrial dime-nsion at the beginning of atrial active contraction (in aortic root echocardiogram) 5) IVST : interv-entricular septal thickness at the top of R wave of ECG (in LV echocardiogram). As a result, AV/EDV, peak AF rate and A dip were directly proportional to IVST within the range of IVST<13 mm. But these indices were inversely proportional to IVST within the range of IVST>13mm. LAD' was poorly correlative to IVST (r= 0.483, p<0.01).

In conclusion it seems to be possible that the booster pump function of the left atrium begins to deteriorate in the hypertensive patients beyond the critical LV wall thickness.


Copyright © 1987, 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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