Europace Advance Access published online on November 14, 2007
Europace, doi:10.1093/europace/eum246
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Precordial low voltage in patients with ascites
Department of Cardiology, Kantonsspital Luzern, 6000 Luzern 16, Switzerland
Aims: Electrocardiographic (ECG) changes in patients with ascites are not well studied. The aim of this study was to evaluate ECG changes in patients with ascites.
Methods and results: Prospective analysis of patients with ascites who were referred for paracentesis. Three ECGs were recorded before paracentesis. ECG 1 was a standard 12-lead ECG. For ECG 2 the precordial leads were placed 1 intercostal space (ICS) and for ECG 3, 2 ICS cranially. The sums (
) of the QRS in ECG1 were compared with ECG 2 and 3. In six patients the same ECG protocol was performed after removal of ascites. Ten hospitalized patients without ascites served as controls. Twenty patients with ascites were analysed. Limbs leads low voltage was present in 11 patients and precordial low voltage in four patients. Cranial placement of the precordial electrodes increased
QRS in all patients with ascites. The most prominent voltage changes appeared in the leads V4–V6 (+62%). Paracentesis of ascites normalized precordial leads low-voltage, while limbs leads low voltage remained. Cranial placement of the precordial electrodes in patients without ascites decreases
V1–V6.
Conclusion: We describe a phenomenon of precordial voltage changes in patients with ascites, not reported in the literature yet. By placing the precordial electrodes 1 and 2 ICS cranially the voltage changes can be corrected and this should be done in all patients prior to further diagnostic workup. Removal of the ascites normalizes the precordial leads low voltage.
Key Words: Ascites, ECG, Precordial low voltage, Intercostal space
* Corresponding author. Tel: +41 412055106; fax: +41 412052234. E-mail address: paul.erne{at}ksl.ch
Manuscript submitted 1 August 2007. Accepted after revision 16 October 2007.