open access

Vol 67, No 4 (2009)
Other
Published online: 2009-04-21
Submitted: 2012-12-28
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Original article
The effects of left ventricular diastolic function on natriuretic peptide levels after cardioversion of atrial fibrillation

Dawid Bąkowski, Beata Wożakowska-Kapłon, Grzegorz Opolski
Kardiol Pol 2009;67(4):361-367.

open access

Vol 67, No 4 (2009)
Other
Published online: 2009-04-21
Submitted: 2012-12-28

Abstract


Background: Diastolic heart failure often coexists with atrial fibrillation (AF). Elevated plasma levels of natriuretic peptides are the left ventricular (LV) marker of diastolic dysfunction.
Aim: To evaluate the influence of sinus rhythm restoration on ANP and BNP levels in patients with normal and impaired LV diastolic function.
Methods: The study included 42 patients (19 men, 23 women), aged 58.6 &plusmn; 8.2 years with non-valvular persistent AF with preserved LV systolic function who were successfully converted to sinus rhythm by DC cardioversion (CV) and maintained sinus rhythm for at least 30 days. On day 30 following CV in patients with sinus rhythm, Doppler echocardiography was performed to assess LV diastolic function. ECG, echocardiography, ANP and BNP plasma level measurements were made at baseline 24 h before CV and 24 h as well as 30 days after CV. Results: The average ANP level in the whole study group during AF was 254.9 &plusmn; 79.9 pg/ml and the average BNP level was 113.6 &plusmn; 49.1 pg/ml. There was an evident decrease in ANP/BNP serum concentration in all the patients after successful DC cardioversion. Measured on the 30th day after CV, ANP and BNP levels were 153.2 &plusmn; 67.9 pg/ml and 61.9 &plusmn; 25.1 pg/ml respectively (p < 0.001). Thirty days after CV normal LV diastolic function was diagnosed in 15 patients and in 27 patients impaired diastolic function: 20 with impaired LV relaxation and 7 with impaired LV compliance. The extent of natriuretic peptides drop was dependent on the LV diastolic function, being more substantial in the subgroup with impaired LV diastolic function. In the subgroup with LV diastolic dysfunction the average ANP serum concentration measured 30 days after conversion was reduced by 111.2 &plusmn; 93.9 pg/ml (37%) (p < 0.001) and BNP level was reduced by 67.5 &plusmn; 36.0 pg/ml (46%) (p < 0.001). In patients with normal diastolic function sinus rhythm restoration significantly influenced ANP level, while having no relevant effect on BNP plasma concentration. The average ANP reduction in this subgroup was 64.4 &plusmn; 71.8 pg/ml (by 38%) and BNP reduction was 11.4 &plusmn; 16.7 pg/ml (by 23%) (NS).
Conclusions: The drop in ANP and BNP plasma concentrations after conversion to sinus rhythm in patients with AF depends on the LV diastolic function. Restoration of sinus rhythm is associated with improvement of the heart&#8217;s haemodynamics, especially in patients with impaired LV diastolic function, which may be inferred from the more pronounced decrease of BNP level after DC cardioversion in this subgroup, as compared to that with normal LV function.

Abstract


Background: Diastolic heart failure often coexists with atrial fibrillation (AF). Elevated plasma levels of natriuretic peptides are the left ventricular (LV) marker of diastolic dysfunction.
Aim: To evaluate the influence of sinus rhythm restoration on ANP and BNP levels in patients with normal and impaired LV diastolic function.
Methods: The study included 42 patients (19 men, 23 women), aged 58.6 &plusmn; 8.2 years with non-valvular persistent AF with preserved LV systolic function who were successfully converted to sinus rhythm by DC cardioversion (CV) and maintained sinus rhythm for at least 30 days. On day 30 following CV in patients with sinus rhythm, Doppler echocardiography was performed to assess LV diastolic function. ECG, echocardiography, ANP and BNP plasma level measurements were made at baseline 24 h before CV and 24 h as well as 30 days after CV. Results: The average ANP level in the whole study group during AF was 254.9 &plusmn; 79.9 pg/ml and the average BNP level was 113.6 &plusmn; 49.1 pg/ml. There was an evident decrease in ANP/BNP serum concentration in all the patients after successful DC cardioversion. Measured on the 30th day after CV, ANP and BNP levels were 153.2 &plusmn; 67.9 pg/ml and 61.9 &plusmn; 25.1 pg/ml respectively (p < 0.001). Thirty days after CV normal LV diastolic function was diagnosed in 15 patients and in 27 patients impaired diastolic function: 20 with impaired LV relaxation and 7 with impaired LV compliance. The extent of natriuretic peptides drop was dependent on the LV diastolic function, being more substantial in the subgroup with impaired LV diastolic function. In the subgroup with LV diastolic dysfunction the average ANP serum concentration measured 30 days after conversion was reduced by 111.2 &plusmn; 93.9 pg/ml (37%) (p < 0.001) and BNP level was reduced by 67.5 &plusmn; 36.0 pg/ml (46%) (p < 0.001). In patients with normal diastolic function sinus rhythm restoration significantly influenced ANP level, while having no relevant effect on BNP plasma concentration. The average ANP reduction in this subgroup was 64.4 &plusmn; 71.8 pg/ml (by 38%) and BNP reduction was 11.4 &plusmn; 16.7 pg/ml (by 23%) (NS).
Conclusions: The drop in ANP and BNP plasma concentrations after conversion to sinus rhythm in patients with AF depends on the LV diastolic function. Restoration of sinus rhythm is associated with improvement of the heart&#8217;s haemodynamics, especially in patients with impaired LV diastolic function, which may be inferred from the more pronounced decrease of BNP level after DC cardioversion in this subgroup, as compared to that with normal LV function.
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Keywords

natriuretic peptides; diastolic dysfunction; atrial fibrillation

About this article
Title

Original article
The effects of left ventricular diastolic function on natriuretic peptide levels after cardioversion of atrial fibrillation

Journal

Kardiologia Polska (Polish Heart Journal)

Issue

Vol 67, No 4 (2009)

Pages

361-367

Published online

2009-04-21

Bibliographic record

Kardiol Pol 2009;67(4):361-367.

Keywords

natriuretic peptides
diastolic dysfunction
atrial fibrillation

Authors

Dawid Bąkowski
Beata Wożakowska-Kapłon
Grzegorz Opolski

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