The aim of the study was to compare the electrocardiographic parameters of clinically healthy Holstein calves raised in the high altitude (3827 m) and at sea level (175 m). Parameters under evaluation were rate, rhythm, size and morphology of the waves, segments and intervals and cardiac axis. The tests were performed in an upright position at an amplitude of 1 mV/cm and speed of 25 mm/sec, using the bipolar (I, II, III) and unipolar (AVL, AVR, and aVF) leads. The results showed that heart rate was 87.33 ± 9.77 and 127.40 ± 7.52 at high altitude and at sea level respectively. The heart rate at both locations were considered as regular normal sinus rhythm. The cardiac axis at high altitude was -120.1 ± 7.30° and at sea level was 63.7 ± 3.02°. It is concluded that there were statistical differences (p<0.05) in heart rate, size and morphology of the waves, intervals, segments and c...

The aim of the study was to compare the electrocardiographic parameters of clinically healthy Holstein calves raised in the high altitude (3827 m) and at sea level (175 m). Parameters under evaluation were rate, rhythm, size and morphology of the waves, segments and intervals and cardiac axis. The tests were performed in an upright position at an amplitude of 1 mV/cm and speed of 25 mm/sec, using the bipolar (I, II, III) and unipolar (AVL, AVR, and aVF) leads. The results showed that heart rate was 87.33 ± 9.77 and 127.40 ± 7.52 at high altitude and at sea level respectively. The heart rate at both locations were considered as regular normal sinus rhythm. The cardiac axis at high altitude was -120.1 ± 7.30° and at sea level was 63.7 ± 3.02°. It is concluded that there were statistical differences (p<0.05) in heart rate, size and morphology of the waves, intervals, segments and c...

Pericardial effusion is described as an abnormal accumulation of fluid in the pericardial cavity, which can lead to a cardiac tamponade associated with neoplasms. It is described the clinical case of a Golden Retriever dog, 10 years old, taken to consultation due to anorexia, abdominal distension and depression. At clinical examination, faintly audible heart sounds, weak femoral pulse and tachypnea were detected. Laboratory tests showed anemia and kidney failure. The ultrasound determined hydropericardium and a tumor mass on the basis of the right heart. The radiological study showed increased heart silhouette. It was concluded that the injury was consistent with cardiac tamponade by pericardial effusion due to a cardiac mass.

Pericardial effusion is described as an abnormal accumulation of fluid in the pericardial cavity, which can lead to a cardiac tamponade associated with neoplasms. It is described the clinical case of a Golden Retriever dog, 10 years old, taken to consultation due to anorexia, abdominal distension and depression. At clinical examination, faintly audible heart sounds, weak femoral pulse and tachypnea were detected. Laboratory tests showed anemia and kidney failure. The ultrasound determined hydropericardium and a tumor mass on the basis of the right heart. The radiological study showed increased heart silhouette. It was concluded that the injury was consistent with cardiac tamponade by pericardial effusion due to a cardiac mass.