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J Thorac Cardiovasc Surg 2000;120:764-769
© 2000 The American Association for Thoracic Surgery

Surgery for Congenital Heart Disease

Suppression of the secretion of atrial and brain natriuretic peptide after total cavopulmonary connection

Naoki Yoshimura, MD, Masahiro Yamaguchi, MD, Yoshihiro Oshima, MD, Shigeteru Oka, MD, Yoshio Ootaki, MD, Tomomi Hasegawa, MD, Chikashi Shimazu, MD

From the Department of Cardiothoracic Surgery, Kobe Children's Hospital, Kobe, Japan.

Address for reprints: Naoki Yoshimura, MD, Department of Cardiothoracic Surgery, Kobe Children's Hospital, 1-1-1, Takakura-dai, Suma-ku, Kobe, 654-0081 Japan (E-mail: y-naoki{at}za2.so-net.ne.jp).

Objectives: Among the modifications of the Fontan operation currently being used, total cavopulmonary connection offers the greatest potential for optimizing early and long-term postoperative outcomes. Although studies have established that abrupt increases in right atrial pressure elevate the plasma atrial natriuretic peptide level after the Fontan procedure, changes in plasma natriuretic peptide levels after total cavopulmonary connection have not been clarified. Our hypothesis is that secretion of atrial natriuretic peptide may be suppressed in patients undergoing total cavopulmonary connection because the atrium continues to function at low pressure in those patients. In this study, we measured plasma levels of atrial and brain natriuretic peptide before and during the postoperative period in patients undergoing total cavopulmonary connection.
Methods: We evaluated 60 patients: 30 patients underwent total cavopulmonary connection and 30 patients underwent definitive repair for Fallot's tetralogy. Blood samples for measurement of atrial and brain natriuretic peptide were obtained before the operation and in the postoperative period.
Results: Plasma levels of atrial and brain natriuretic peptide were significantly lower during the early postoperative period in patients undergoing total cavopulmonary connection than in patients undergoing definitive repair for Fallot's tetralogy. No correlations were identified between the atrial natriuretic peptide levels and central venous pressure after total cavopulmonary connection.
Conclusion: These results suggest that total cavopulmonary connection attenuates the secretion of atrial and brain natriuretic peptide in the early postoperative period. The suppressed release of atrial and brain natriuretic peptide after total cavopulmonary connection may have clinical importance.




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