scholarly journals Role of Xanthine Oxidoreductase in the Reversal of Diastolic Heart Failure by Candesartan in the Salt-Sensitive Hypertensive Rat

Hypertension ◽  
2007 ◽  
Vol 50 (4) ◽  
pp. 657-662 ◽  
Author(s):  
Eiichiro Yamamoto ◽  
Keiichiro Kataoka ◽  
Takuro Yamashita ◽  
Yoshiko Tokutomi ◽  
Yi-Fei Dong ◽  
...  
2007 ◽  
Vol 293 (4) ◽  
pp. H2409-H2417 ◽  
Author(s):  
Ye Chen-Izu ◽  
Christopher W. Ward ◽  
Wayne Stark ◽  
Tamas Banyasz ◽  
Marius P. Sumandea ◽  
...  

As a critical step toward understanding the role of abnormal intracellular Ca2+ release via the ryanodine receptor (RyR2) during the development of hypertension-induced cardiac hypertrophy and heart failure, this study examines two questions: 1) At what stage, if ever, in the development of hypertrophy and heart failure is RyR2 hyperphosphorylated at Ser2808? 2) Does the spatial distribution of RyR2 clusters change in failing hearts? Using a newly developed semiquantitative immunohistochemistry method and Western blotting, we measured phosphorylation of RyR2 at Ser2808 in the spontaneously hypertensive rat (SHR) at four distinct disease stages. A major finding is that hyperphosphorylation of RyR2 at Ser2808 occurred only at late-stage heart failure in SHR, but not in age-matched controls. Furthermore, the spacing between RyR2 clusters was shortened in failing hearts, as predicted by quantitative model simulation to increase spontaneous Ca2+ wave generation and arrhythmias.


2015 ◽  
Vol 36 (38) ◽  
pp. 2555-2564 ◽  
Author(s):  
Thomas Münzel ◽  
Tommaso Gori ◽  
John F. Keaney ◽  
Christoph Maack ◽  
Andreas Daiber

2009 ◽  
Vol 150 (45) ◽  
pp. 2060-2067 ◽  
Author(s):  
András Nagy ◽  
Zsuzsanna Cserép

Diabetes mellitus, a disease that has been reaching epidemic proportions, is an important risk factor to the development of cardiovascular complication. The left ventricular diastolic dysfunction represents the earliest pre-clinical manifestation of diabetic cardiomyopathy, preceding systolic dysfunction and being able to evolve to symptomatic heart failure. In early stages, these changes appear reversible with tight metabolic control, but as pathologic processes become organized, the changes are irreversible and contribute to an excess risk of heart failure among diabetic patients. Doppler echocardiography provides reliable data in the stages of diastolic function, as well as for systolic function. Combination of pulsed tissue Doppler study of mitral annulus with transmitral inflow may be clinically valuable for obtaining information about left ventricular filling pressure and unmasking Doppler inflow pseudonormal pattern, a hinge point for the progression toward advanced heart failure. Subsequently we give an overview about diabetes and its complications, their clinical relevance and the role of echocardiography in detection of diastolic heart failure in diabetes.


2007 ◽  
Vol 27 (12) ◽  
pp. 2569-2575 ◽  
Author(s):  
Eiichiro Yamamoto ◽  
Keiichiro Kataoka ◽  
Haruo Shintaku ◽  
Takuro Yamashita ◽  
Yoshiko Tokutomi ◽  
...  

2016 ◽  
Vol 34 ◽  
pp. e239
Author(s):  
S. Persampieri ◽  
G. Ferrante ◽  
L. Giugno ◽  
A. Carretta ◽  
B. Caimi ◽  
...  

2021 ◽  
Author(s):  
Naghmeh Ziaie ◽  
Khadijeh Ezoji ◽  
Seyedeh Golnaz Ziaei ◽  
Mohammad Chehrazi ◽  
Parviz Amri Maleh ◽  
...  

Abstract Background: Diastolic dysfunction has been reported in patients with COVID-19. Due to the role of N-terminal pro-brain natriuretic peptide (NT-proBNP) in the diagnosis of heart failure, this study investigated the relationship between serum NT-proBNP levels and diastolic heart failure in COVID-19 patients.Methods: This descriptive-analytical study was performed at Ayatollah Rouhani Hospital in Babol. Fifty-four patients with confirmed COVID-19 diagnosis who were admitted to the ICU were included in the study. The primary outcome was the relationship and predictive role of NT-proBNP and diastolic heart failure in patients with severe SARS-COV-2 infection. Patients with pro BNP >125 pg/mL underwent echocardiography and the relationship between echocardiographic indices and NT-proBNP was assessed as a secondary outcome.Results: Our study showed that plasma NT-proBNP levels in patients with increased diastolic dysfunction were associated with disease severity. It was also found that the cut-off point of NT-proBNP = 799 pg/mL could be a predictor of diastolic dysfunction grades two and three. In this study, patients with a serum NT-proBNP level equal or above 799 had 37 times higher chance of having diastolic dysfunction than those with a serum NT-proBNP level below 799. Patients with NT-proBNP above 556 had RV_EA> 2 in echocardiography, indicating increased right-sided filling pressures.Conclusion: Despite the confounding factors in the interpretation of the pro BNP level in COVID-19, its level can be used to estimate the presence of high-grade diastolic heart failure on the left and right sides of the heart and the presence of high filling pressures. Lower levels of NT-proBNP are associated with right-sided diastolic failure.


2017 ◽  
Vol 27 (4) ◽  
pp. 126 ◽  
Author(s):  
Federico Cacciapuoti ◽  
ValerioMassimo Magro ◽  
Michele Caturano ◽  
Diana Lama ◽  
Fulvio Cacciapuoti

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