Patients with diastolic heart failure (DHF)
Protein kinase A (PKA) application
Cardiomyocyte stiffness (F(passive) at the same sarcomere length)surrogate
Cardiomyocyte stiffness in diastolic heart failure is associated with reduced phosphorylation of sarcomeric proteins and can be corrected by PKA.
DHF patients had stiffer cardiomyocytes, as evident from a higher F(passive) at the same sarcomere length. Together with CVF, F(passive) determined in vivo diastolic LV dysfunction. Correction of this high F(passive) by PKA suggests that reduced phosphorylation of sarcomeric proteins is involved in DHF.
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Attila Borbély
Jolanda van der Velden
Zoltán Papp
Circulation
Vanderbilt University Medical Center
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Borbély et al. (Tue,) studied this question.
www.synapsesocial.com/papers/69d576d1c81cc4d948f4493c — DOI: https://doi.org/10.1161/01.cir.0000155257.33485.6d