Echocardiographic Assessment of Right Atrial Function in Patients With Myocardial Infarction With Reference to Obstructive Lesions of the Coronary Arteries

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概要

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• We assessed the relationship between right atrial(RA)function and obstructive lesions of the coronary arteries in 29 patients with recent or old myocardial infarction(MI).Patients were devided into 3 groups according to the location of obstructions as follows:obstruction at the proximal right coronary artery(segments 1 and 2)(RCA proximal group, n=9);obstruction at the distal RCA(segments 3 and 4)(RCA distal group, n=6);and obstruction at the left anterior descending coronary artery(LCA group, n=14).The RA volume and the fractional change in the RA area during atrial contraction(RA %AC)were evaluated by apical 2-dimensional echocardiography.The right ventricular(RV)end-diastolic pressure(RVEDP)was measured in 4 patients in the RCA proximal group and 4 patients in the LCA group.The ejection fraction of the right ventricle(RVEF)was measured by radionuclide angiography or 2-dimensional echocardiography in 7 patients in the RCA proximal group, 5 patients in the RCA distal group, and 7 patients in the LCA group.The RVEF tended to be lower in the RCA proximal group than in the RCA distal and LCA groups.The RA volume was significantly greater in the RCA proximal group than in the LCA group.The RA %AC was significantly smaller in the RCA proximal group than in the RCA distal and LCA groups.There were no significant differences in the early diastolic RV inflow velocity among groups, but the late diastolic RV inflow velocity was significantly lower in the RCA proximal group than in the RCA distal and LCA groups.There was no significant difference in the RVEDP between the RCA proximal and LCA groups.Thus, RA dysfunction in the RCA proximal group appeared to be due to myocardial damage rather than to afterload mismatch.These findings suggest that RA dysfunction may occur in patients with an inferior MI who have an obstructive lesion of the proximal RCA.

• 社団法人日本循環器学会の論文
• 1998-05-20

著者

• Yui Yasuko

  Department Of Clinical Laboratory National Hospital Organization Zentsuji Hospital

• Fnkuda Nobuo

  Department Of Cardiology And Clinical Research National Hospital Organization Zentsuji Hospital

• Fukuda N

  National Institute Of Radiological Sciences

• Fukuda Nobuo

  Tsukuba Research Laboratory Nof Coproration

• Oki Takashi

  Second Department of Internal Medicine, University of Tokushima

• Takiuchi Shin

  Division Of Hypertension And Nephrology National Cardiovascular Center

• Shinomiya Hirohiko

  Clinical Reserch Institute and Division of Cardiology, Zentsuji National Hospital

• Fukuda Nobuo

  Clinical Reserch Institute and Division of Cardiology, Zentsuji National Hospital

• Takeichi Naoki

  Clinical Reserch Institute and Division of Cardiology, Zentsuji National Hospital

• Soeki Takeshi

  Clinical Reserch Institute and Division of Cardiology, Zentsuji National Hospital

• Shinohara Hisanori

  Clinical Reserch Institute and Division of Cardiology, Zentsuji National Hospital

• Yui Yasuko

  Clinical Reserch Institute and Division of Cardiology, Zentsuji National Hospital

• Tamura Yoshiyuki

  Clinical Reserch Institute and Division of Cardiology, Zentsuji National Hospital

• Sugihara Takashi

  Division Of Cardiovascular Medicine Tokushima University Hospital

• Tamura Yoshiyuki

  Department Of Cardiology And Clinical Research National Hospital Organization Zentsuji Hospital

• Shinohara Hisanori

  Department Of Cardiology And Clinical Research National Hospital Organization Zentsuji Hospital

• Shinohara Hisanori

  Department Of Internal Medicine And Clinical Research National Zentsuji Hospital

• Oki T

  Cardiovascular Section Higashi Tokushima National Hospital National Hospital Organization

• Takeichi Naoki

  Division Of Cardiology And Clinical Research Zentsuji National Hospital

• Oki T

  Department Of Health Examination Kochi Red Cross Hospital

• Oki Takashi

  Second Department Of Internal Medicine

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