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   Table of Contents      
CORRESPONDENCE
Year : 2015  |  Volume : 141  |  Issue : 3  |  Page : 359-360

Authors' response


1 Department of Internal Medicine, II Division of Cardiology Medical University of Vienna 1090 Viena, Austria
2 Department of Internal Medicine, II Division of Cardiology Medical University of Vienna 1090 Viena, Austria; Zena and Michael A. Wiener Cardiovascular Institute, New York, USA

Date of Web Publication7-May-2015

Correspondence Address:
G Goliasch
Department of Internal Medicine, II Division of Cardiology Medical University of Vienna 1090 Viena, Austria; Zena and Michael A. Wiener Cardiovascular Institute, New York, USA

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Source of Support: None, Conflict of Interest: None


DOI: 10.4103/0971-5916.156576

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How to cite this article:
Distelmaier K, Maurer G, Goliasch G. Authors' response. Indian J Med Res 2015;141:359-60

How to cite this URL:
Distelmaier K, Maurer G, Goliasch G. Authors' response. Indian J Med Res [serial online] 2015 [cited 2020 May 26];141:359-60. Available from: http://www.ijmr.org.in/text.asp?2015/141/3/359/156576

Sir,

We thank Kotani and colleagues for the appreciation of our work [1] . In view of the published data [2],[3],[4] , we agree that oxidative stress might be potentially involved in the pathogenesis of atrial fibrillation. Increased blood viscosity has been identified as a sensitive marker for underlying oxidative stress [5],[6] . i0 t is tempting to speculate that our findings might be regarded as surrogate parameter for oxidative stress, showing an association between haematocrit and the occurrence of atrial fibrillation after acute myocardial infarction. The fact that in our study the haematocrit level did not show a similar impact on the occurrence of atrial fibrillation in a manner proportional to the haemoglobin and red blood cell counts might be purely owed to the small sample size and the retrospective study design. The blood count levels in our predominantly male study population (61%) were more in the upper normal range (95% percentiles: haemoglobin 15.9 mg/dl, haematocrit 47.8 per cent, erythrocyte count 5.3 T/l). We agree with Kotani and colleagues that the measurement of oxidative stress and antioxidant capacity might reveal valuable additional information and should be addressed by further studies. We also agree that unification of the timing of blood sample collection and additional clinical variables (e.g. heart rate and blood pressure prior to onset of atrial fibrillation, fluid therapy, etc.) is of potential interest. However, due to the retrospective nature of our nested-case control study we were not able to provide this information and should, therefore, be evaluated by future prospective studies. The present study was not designed to reveal the underlying pathophysiological mechanisms of new onset of atrial fibrillation after acute myocardial infarction, but was purely conducted to identify novel predictors, that might be objective of further studies.

 
   References Top

1.
Distelmaier K, Maurer G, Goliasch G. Blood count in new onset atrial fibrillation after acute myocardial infarction - a hypothesis generating study. Indian j0 m0 ed r0 es 2014; 139 : 579-84.  Back to cited text no. 1
    
2.
Rodrigo R, Vinay J, Castillo R, Cereceda M, Asenjo R, Zamorano J, et al. Use of vitamins C and E as a prophylactic therapy to prevent postoperative atrial fibrillation. Int J Cardiol 2010; 138 : 221-8.  Back to cited text no. 2
    
3.
Schillinger KJ, Patel VV. Atrial fibrillation in the elderly: The potential contribution of reactive oxygen species. J g0 eriatr c0 ardiol 2012; 9 : 379-88.  Back to cited text no. 3
    
4.
Tousoulis D, Zisimos K, Antoniades C, Stefanadi E, Siasos G, Tsioufis C, et al. Oxidative stress and inflammatory process in patients with atrial fibrillation: The role of left atrium distension. Int J Cardiol 2009; 136 : 258-62.  Back to cited text no. 4
    
5.
Ajmani RS, Metter EJ, Jaykumar R, Ingram DK, Spangler EL, Abugo OO, et al. Hemodynamic changes during aging associated with cerebral blood flow and impaired cognitive function. Neurobiol Aging 2000; 21 : 257-69.  Back to cited text no. 5
    
6.
Richards RS, Nwose EU. Blood viscosity at different stages of diabetes pathogenesis. Br J Biomed Sci 2010; 67 : 67-70.  Back to cited text no. 6
    




 

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