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Heart 2000;83:439-443 ( April )

Interventional cardiology surgery

Neurohormonal activation late after cavopulmonary connection V E Hjortdala, E V Stenbøga, H B Ravnc, K Emmertsenb, K T Jensenb, E B Pedersend, K H Olsenc, O K Hansena, K E Sørensenb

a Department of Cardiothoracic Surgery, Aarhus University Hospital, Skejby Section, DK-8200 Aarhus N, Denmark, b Department of Cardiology, Aarhus University Hospital, c Department of Anaesthesiology, Aarhus University Hospital, d Department of Medicine, Holstebro Hospital, Denmark

Correspondence to: Dr Hjortdal email: vibeke.hjortdal{at}dadlnet.dk

Accepted 18 November 1999

OBJECTIVE---To determine whether patients with cavopulmonary connection have higher levels of vasoactive/water-salt regulating hormones and if so, whether hormone levels are related to postoperative haemodynamics and postoperative follow up.
DESIGN---Cross sectional study.
SETTING---University hospital.
PATIENTS---20 patients (New York Heart Association functional class I-II), mean age 11 years (range 4 to 22), were studied at a mean of 2 years (0.5 to 6) after a total cavopulmonary connection (TCPC, n = 12) or a bidirectional Glenn anastomosis (BDG, n = 8).
INTERVENTIONS---Cardiac catheterisation was performed and blood samples were drawn. Control blood samples were drawn from 33 healthy children, mean age 12 years (6 to 16).
MAIN OUTCOME MEASURES---Plasma levels of angiotensin II, renin, aldosterone, arginine, vasopressin, atrial natriuretic factor (ANF), brain natriuretic peptide (BNP).
RESULTS---All neurohormones were significantly increased in both TCPC and BDG patients (p < 0.05), with a fourfold increase in angiotensin II, renin, and aldosterone, and a twofold increase in vasopressin, ANF, and BNP (compared with healthy controls). There was no correlation between haemodynamic variables and hormone levels. Angiotensin II and renin were inversely correlated with time to follow up. All subjects over 15 years (n = 5) had normal neurohormonal levels.
CONCLUSIONS---Neurohormones were raised for years after successful cavopulmonary operations but lower levels were observed with time on follow up. This supports the hypothesis that neurohormonal activation is primarily related to altered postoperative physiology and that adaptation takes place over time.


Keywords: neurohormones; cavopulmonary connection; congenital heart disease; paediatric cardiology

© 2000 by Heart


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