> size="2" face="Verdana, Arial, Helvetica, sans-serif">The purpose of this study was to determine values as E and A waves velocities, E/A ratio, E wave deceleration time, and IVRT in healthy non-sedated cats, as well as correlate these indices to the heart rate. Forty healthy, adult cats housed in the cattery of the School of Veterinary Medicine of São Paulo University were studied. Mean, standard deviation, median, interquartilic interval and range were calculated. Doppler examination was performed with the cats restrained in left lateral recumbency. Good correlation between heart rate and E wave velocity, E/A ratio and IVRT was observed, whereas E wave deceleration time and A wave velocity were not affected by the heart rate. The estabilishment of these values will allow to define the pattern of the diastolic abnormality, usually related to cardiomyopathies in cats.
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