TAIPAI study group members are given in the Appendix
The association of serum potassium level with left ventricular mass in patients with primary aldosteronism
Article first published online: 21 JAN 2011
© 2011 The Authors. European Journal of Clinical Investigation © 2011 Stichting European Society for Clinical Investigation Journal Foundation
European Journal of Clinical Investigation
Volume 41, Issue 7, pages 743–750, July 2011
How to Cite
Lin, Y.-H., Wang, S.-M., Wu, V.-C., Lee, J.-K., Kuo, C.-C., Yen, R.-F., Liu, K.-L., Huang, K.-H., Chueh, S.-C., Wang, W.-J., Lin, L.-Y., Chien, K.-L., Ho, Y.-L., Chen, M.-F., Wu, K.-D. and the TAIPAI study group (2011), The association of serum potassium level with left ventricular mass in patients with primary aldosteronism. European Journal of Clinical Investigation, 41: 743–750. doi: 10.1111/j.1365-2362.2010.02462.x
- Issue published online: 9 JUN 2011
- Article first published online: 21 JAN 2011
- Received 29 June 2010; accepted 13 December 2010
- diastolic function;
- left ventricular mass;
- primary aldosteronism
Eur J Clin Invest 2011; 41 (7): 743–750
Background Primary aldosteronism (PA) is associated a worse cardiovascular outcome than essential hypertension. Hypokalemia, which is one major characteristic of PA, can affect both cardiac structure and function. The goal of this study is to evaluate the influence of serum potassium level on left ventricular (LV) mass and function in PA patients.
Materials and methods We prospectively analysed 85 PA patients from October 2006 to September 2008 and 27 essential hypertension patients as the control group (group 1). Thirty-two patients with serum potassium < 3·5 mmol L−1 were defined as hypokalemia (group 2), and 53 patients with serum potassium ≥ 3·5 mmol L−1 were defined as normokalemia (group 3). Echocardiography including tissue Doppler image (TDI) recordings was performed in all patients.
Results Group 2 patients had significant higher systolic and diastolic blood pressure (DBP), log-transformed plasma aldosterone concentration, log-transformed aldosterone-to-renin ratio and lower serum potassium level than groups 1 and 3. In echocardiographic measurement, group 2 patients had higher LV mass index (LVMI) than groups 1 and 3. In multivariate analysis for factors affecting LVMI in PA patients, only serum potassium level (P = 0·001), use of spironolactone (P = 0·004) and DBP (P = 0·005) were independent factors. In the TDI study, both groups 2 and 3 had lower e′ and E/e′ values than group 1.
Conclusions Serum potassium level is significantly associated with LVMI in PA patients. Compared with essential hypertensive patients, PA patients had a greater impairment of cardiac diastolic function.