Annals of Indian Academy of Neurology
LETTER TO THE EDITOR
Year
: 2014  |  Volume : 17  |  Issue : 2  |  Page : 243-

Brain natriuretic peptide among stroke patients


Ayhan Saritas1, Zeynep Cakir2,  
1 Department of Emergency Medicine, Duzce University School of Medicine, Duzce, Turkey
2 Department of Emergency Medicine, Ataturk University School of Medicine, Erzurum, Turkey

Correspondence Address:
Ayhan Saritas
Department of Emergency Medicine, Duzce University School of Medicine, 81620, Duzce
Turkey




How to cite this article:
Saritas A, Cakir Z. Brain natriuretic peptide among stroke patients.Ann Indian Acad Neurol 2014;17:243-243


How to cite this URL:
Saritas A, Cakir Z. Brain natriuretic peptide among stroke patients. Ann Indian Acad Neurol [serial online] 2014 [cited 2019 Nov 18 ];17:243-243
Available from: http://www.annalsofian.org/text.asp?2014/17/2/243/132667


Full Text

Sir,

We thank Dr. Wu et al.[1] for their interest in our article named "A prospective study of brain natriuretic peptide (BNP) levels in three subgroups: Stroke with hypertension, stroke without hypertension, and hypertension alone." [2] Early prediction of fatal outcome after stroke might improve decision-making processes. The role of BNP and N-terminal of the prohormone BNP (NT-proBNP) as independent predictors of all-cause mortality after stroke. [3] BNP has a significant association with mortality and functional outcome, in recent times studies. [4],[5]

Dr. Wu et al. have claimed that the including patients in Group I and II could not be representative of the classical stroke types. However, patients in Group I and II were typically classical stroke and they were scored according to the National Institutes of Health Stroke Scale (NIHSS). Furthermore, Dr. Wu et al. have claimed that serious bias in our study. These are very heavy and unfair allegations. We do not certainly agree to these allegations. There is no any bias in our study. Several cardiac abnormalities such as cardiac failure, myocardial necrosis, and arrhythmia can develop in acute stroke patients. These cardiac changes may cause increased BNP production by the heart. [6],[7],[8] Therefore, our study the relationship between BNP levels and acute ischemic stroke (AIS) correctly. It is better to exclude those stroke patients who also have cardiac pathologies. In our study, patients with congestive heart failure, chronic cor pulmonale, severe valvular heart disease, chronic renal failure, liver insufficiency, diabetes mellitus, and atrial fibrillation were excluded from the study, especially. Because these diseases can affect the plasma BNP levels. The mean BNP levels in our study subjects were affected only by hypertension and stroke.

Another criticism made by Dr. Wu et al. is that we did not classify the AIS patients into any subtypes. They are right about that. We only classified the stroke patients into two subtypes ischemic and hemorrhagic.

Garcνa-Berrocoso et al. [3] have reported that BNPs (both BNP and NT-proBNP) are associated with post stroke mortality independent of NIHSS score, age, and sex in their meta-analysis. [3] Furthermore, we agree with Dr. Wu et al. opinion about the value of the use of BNP in AIS patients.

References

1Wu Z, He M, Gao S, Yang L. Opinions about the use of brain natriuretic peptide among acute ischemic stroke patients. Ann Indian Acad Neurol 2013;16:726.
2Cakir Z, Saritas A, Emet M, Aslan S, Akoz A, Gundogdu F. A prospective study of brain natriuretic peptide levels in three subgroups: Stroke with hypertension, stroke without hypertension, and hypertension alone. Ann Indian Acad Neurol 2010;13:47-51.
3García-Berrocoso T, Giralt D, Bustamante A, Etgen T, Jensen JK, Sharma JC, et al. B-type natriuretic peptides and mortality after stroke: A systematic review and meta-analysis. Neurology 2013;81:1976-85.
4Whiteley W, Wardlaw J, Dennis M, Lowe G, Rumley A, Sattar N, et al. The use of blood biomarkers to predict poor outcome after acute transient ischemic attack or ischemic stroke. Stroke 2012;43:86-91.
5Montaner J, García-Berrocoso T, Mendioroz M, Palacios M, Perea-Gainza M, Delgado P, et al. Brain natriuretic peptide is associated with worsening and mortality in acute stroke patients but adds no prognostic value to clinical predictors of outcome. Cerebrovasc Dis 2012;34:240-5.
6Duygu H, Türk U, Zoghi M, Nalbantgil S. The importance of plasma B-type natriuretic peptide levels in cardiovascular diseases. Anadolu Kardiyol Derg 2005;5:305-11.
7Oppenheimer SM, Lima J. Neurology and the heart. J Neurol Neurosurg Psychiatry 1998;64:289-97.
8Myers MG, Norris JW, Hachinski VC, Weingert ME, Sole MJ. Cardiac sequelae of acute stroke. Stroke 1982;13:838-42.