Effects of Volume Loading on Pulmonary Venous Flow and its Relation to Left Atrial Functions

• Hondo Tatsuya

  First Department of Internal Medicine, Hiroshima University School of Medicine

• Okamoto Mitsunori

  First Department of Internal Medicine, Hiroshima University School of Medicine

• Kawagoe Takuji

  First Department of Internal Medicine, Hiroshima University School of Medicine

• Yamane Tetsuya

  First Department of Internal Medicine, Hiroshima University School of Medicine

• Karakawa Shinji

  First Department of Internal Medicine, Hiroshima University School of Medicine

• Yamagata Togo

  First Department of Internal Medicine, Hiroshima University School of Medicine

• Matsuura Hideo

  First Department of Internal Medicine, Hiroshima University School of Medicine

• Kajiyama Goro

  First Department of Internal Medicine, Hiroshima University School of Medicine

Abstract

Although pulmonary venous (PV) flow is closely related to left atrial (LA) pressure dynamics, few investigators have discussed it in relation to LA functions, ie, reservoir, conduit, and booster pump functions. We examined changes in PV flow rate, LA dimension, and left ventricular filling volume in 11 dogs, and assessed the effects of multistaged volume loading on PV flow and LA functions. Systolic PV flow rate (S) increased significantly and reached a plateau, reflecting a limited LA reservoir function. Diastolic PV flow rate (D) increased significantly with an increase in LA pressure. S/D ratio increased non-significantly from 0.87±0.07 before volume loading to 0.96±0.08 until S reached a plateau and then decreased to 0.76±0.08 (p<0.05) because of a significant increase in D without an increase in S at the higher stages of volume loading. During atrial contraction, increases in LA active shortening and left ventricular filling volume were limited, indicating a limited LA forward ejection. The difference between PV flow rate just before and at the end of atrial contraction increased and correlated positively with left ventricular end-diastolic pressure (r=0.57, p<0.01). PV flow varies according to the degree of volume loading and reflects LA functions, which exhibit limited increases in response to volume loading. (Jpn Circ J 1997; 61: 1015 - 1020)

Journal

• Japanese Circulation Journal

  Japanese Circulation Journal 61 (12), 1015-1020, 1997

  The Japanese Circulation Society

Keywords

• Pulmonary venous flow
• Left atrial function
• Volume loading

Details

• CRID: 1390001206428243456
• NII Article ID: 110002564469
• NII Book ID: AA00690731
• DOI: 10.1253/jcj.61.1015
• COI: 1:STN:280:DyaK1c%2FnsVentA%3D%3D
• ISSN: 13474839
• ISSN: 00471828
• PubMed: 9412866
• Web Site: http://www.jstage.jst.go.jp/article/jcj/61/12/61_12_1015/_pdf
• Web Site: https://search.jamas.or.jp/link/ui/1998126372
• Text Lang: en
• Data Source:
  • JaLC
  • Crossref
  • PubMed
  • CiNii Articles
• Abstract License Flag: Disallowed