Influence of aging, tidal volume, and respiratory rate on doppler echocardiographic indices of diastolic function in normal male subjects: a quantitative evaluation - Romano, Minna Moreira Dias; Pazin-Filho, Antônio; Crescêncio, Júlio César; Schmidt, André; Almeida-Filho, Oswaldo César de; Gallo Júnior, Lourenço; Marin-Neto, José Antônio; Maciel, Benedito Carlos (Echocardiography, 2008)