Sildenafil preserves diastolic relaxation after reduction by L-NAME and increases phosphodiesterase-5 in the intercalated discs of cardiac myocytes and arterioles . Clinics [Internet]. 2011 Jan. 1 [cited 2024 May 2];66(7):1253-8. Available from: https://www.revistas.usp.br/clinics/article/view/19370