EN
The tests were performed on 21 healthy dogs of various breeds and sexes, with body weights from 3 to 70 kg, aged between 1 and 12 years, submitted to the ECG preventive examination. The ECG was performed in a standing position with BTL SD-8 electrocardiographic device and analysed once the recording was enlarged. P-wave duration was calculated in six ECG leads (I, II, III, aVR, aVL, aVF) from five cardiac cycles. The mean Pₘₐₓ value was determined at 55.8±11.3 ms, Pₘᵢₙ at 38.9±12.5 ms, and Pd at 16.9±9.4 ms. The proper Pd value was determined at up to 36 ms.