<abstract xmlns="http://www.w3.org/1999/xhtml">

<sec id="j_jvetres-2020-0047_s_005">
<h3>Introduction</h3>
<p>Atrial fibrillation may potentially contribute to oxidative stress to a greater extent than chronic heart failure. The aim of the study was to compare the serum total antioxidant capacity and enzymatic antioxidant defence of dogs with chronic heart failure and atrial fibrillation with those of subjects with chronic heart failure and sinus rhythm and healthy controls.</p>
</sec>
<sec id="j_jvetres-2020-0047_s_006">
<h3>Material and Methods</h3>
<p>A total of 33 dogs were divided into three groups: dogs with chronic heart failure and atrial fibrillation (CHF + AF; n = 12), chronic heart failure and sinus rhythm (CHF + SR; n = 9), and healthy controls (n = 12). Serum total antioxidant capacity (TAC), serum CuZn-superoxide dismutase (SOD) and catalase, and plasma glutathione peroxidase (GPx) activity were determined.</p>
</sec>
<sec id="j_jvetres-2020-0047_s_007">
<h3>Results</h3>
<p>SOD activity and serum TAC were significantly lower in the study groups than in control animals. Catalase activity was significantly higher and plasma GPx activity significantly lower in dogs with CHF + AF compared with the CHF + SR and control dogs.</p>
</sec>
<sec id="j_jvetres-2020-0047_s_008">
<h3>Conclusion</h3>
<p>The results suggest that chronic heart failure in dogs significantly impacts the serum TAC and the antioxidant enzymatic defence, while plasma GPx activity is markedly lower in dogs with chronic heart failure and atrial fibrillation. The role of that imbalance needs further investigation.</p>
</sec></abstract>

Introduction
Atrial fibrillation may potentially contribute to oxidative stress to a greater extent than chronic heart failure. The aim of the study was to compare the serum total antioxidant capacity and enzymatic antioxidant defence of dogs with chronic heart failure and atrial fibrillation with those of subjects with chronic heart failure and sinus rhythm and healthy controls.


Material and Methods
A total of 33 dogs were divided into three groups: dogs with chronic heart failure and atrial fibrillation (CHF + AF; n = 12), chronic heart failure and sinus rhythm (CHF + SR; n = 9), and healthy controls (n = 12). Serum total antioxidant capacity (TAC), serum CuZn-superoxide dismutase (SOD) and catalase, and plasma glutathione peroxidase (GPx) activity were determined.


Results
SOD activity and serum TAC were significantly lower in the study groups than in control animals. Catalase activity was significantly higher and plasma GPx activity significantly lower in dogs with CHF + AF compared with the CHF + SR and control dogs.


Conclusion
The results suggest that chronic heart failure in dogs significantly impacts the serum TAC and the antioxidant enzymatic defence, while plasma GPx activity is markedly lower in dogs with chronic heart failure and atrial fibrillation. The role of that imbalance needs further investigation.

Serum total antioxidant capacity and enzymatic defence of dogs with chronic heart failure and atrial fibrillation: a preliminary study

Journal of Veterinary Research

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Introduction
Atrial fibrillation may potentially contribute to oxidative stress to a greater extent than chronic heart failure. The aim of the study was to...

Variable	CHF + AF	CHF + SR	Control	P value
total number	12	9	12	-
age (yrs)	8.15 ± 3.58	10.84 ± 1.88^A	6.96 ± 2.83^B	P < 0.05
body weight (kg)	37.41 ± 20.51^B	16.3 ± 9.18^C	21.54 ± 9.61	P < 0.05
sex (male/female)	8/4	7/2	5/7	ns
LA/Ao	2.42 (1.68–3.92)^A	2.29 (2.01–3.29)^A	1.4 (0.97–1.48)^B,C	P < 0.0001
LVIDDN	2.2 (1.92–3.27)^A	2.2 (1.99–2.43)^A	1.52 (1.39–1.61)^B,C	P < 0.0001
HR	228.08 ± 34.34^A,B	142 ± 29.81^C	105.33 ± 13.68^C	P < 0.0001
NYHA class III	4/12	4/9	0/12
NYHA class IV	8/12	5/9	0/12
cardiac treatment	8/12	5/9	0/12
Drugs
ACE-I	6/12	5/9	0/12
spironolactone	6/12	5/9	0/12
digoxin	3/12	0/9	0/12
loop diuretics	8/12	5/9	0/12
β-blockers	3/12	0/9	0/12

Serum total antioxidant capacity and enzymatic defence of dogs with chronic heart failure and atrial fibrillation: a preliminary study

Publié en ligne: 28 juil. 2020

Pages: 439 - 444

Reçu: 07 nov. 2019

Accepté: 26 juin 2020

DOI: https://doi.org/10.2478/jvetres-2020-0047

Mots clés
dogs, cardiology, atrial fibrillation, chronic heart failure, oxidative stress

© 2020 M. Michałek et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Fig. 1

Fig. 2

Fig. 3

Demographic, echocardiographic, and treatment characteristics of the study groups. Statistical significance of the intergroup differences is shown in the superscript letters

Serum total antioxidant capacity and enzymatic defence of dogs with chronic heart failure and atrial fibrillation: a preliminary study

Publié en ligne: 28 juil. 2020

Pages: 439 - 444

Reçu: 07 nov. 2019

Accepté: 26 juin 2020

DOI: https://doi.org/10.2478/jvetres-2020-0047

Mots clésdogs, cardiology, atrial fibrillation, chronic heart failure, oxidative stress

© 2020 M. Michałek et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Fig. 1

Fig. 2

Fig. 3

Demographic, echocardiographic, and treatment characteristics of the study groups. Statistical significance of the intergroup differences is shown in the superscript letters

Mots clés
dogs, cardiology, atrial fibrillation, chronic heart failure, oxidative stress