Standardization of some electrocardiographic parameters of captive leopard cats (Leopardus tigrinus).

Thirty-three captive leopard cats, Leopardus tigrinus, were anesthetized with xylazine (1-2 mg/kg) and ketamine (10 mg/kg), and electrocardiograph (ECG) tests were recorded in all leads with 1 cm = 1 mV sensibility and 25 mm/sec speed repeating DII lead at 50 mm/sec speed with the same sensibility. Results expressed by mean and standard deviation were: heart rate (HR) = 107 +/- 17 (bpm); P-wave = 0.048 +/- 0.072 (s) x 0.128 +/- 0.048 (mV); PR interval = 0.101 +/- 0.081 (s); QRS compound = 0.053 +/- 0.012 (s) x 1.446 +/- 0.602 (mV); QT interval = 0.231 +/- 0.028 (s); R-wave (CV6LL) = 1.574 +/- 0.527 (mV); R-wave (CV6LU) = 1.583 +/- 0.818 (mV); heart rhythm: normal sinus rhythm (15.2%), sinus rhythm with wandering pacemaker (WPM) (60.6%), sinus arrhythmia with WPM (24.2%); electric axis: between +30 degrees and +60 degrees (6.1%), +60 (6.1%), between +60 degrees and +90 degrees (57.6%), +90 degrees (9%), between +90 degrees and +120 degrees (21.2%); ST segment: normal (75.7%), elevation (18.2%), depression (6.1%); T-wave polarity (DII): positive (100%); T-wave (V10): absent (6.1%), negative (63.6%), positive (18.2%), and with interference (12.1%). Through ECG data comparison with other species, unique features of Leopardus tigrinus' (leopard cat) ECG parameters were detected. Some of the study animals presented with an R-wave amplitude that was indicative of left ventricle overload according to patterns for normal domestic cats (Felis cati). Echocardiographic exams revealed normal heart cavities' function and morphology. The aim of this study was to establish some electrocardiographic parameters of captive L. tigrinus.

Padronização de alguns parâmetros eletrocardiográficos de animais da espécie Herpailurus yagouaroundi, mantidos em cativeiro / Padronization of some electrocardiography parameters of captivity Herpailurus yagouaroundi

Vinte e um animais da espécie Herpailurus yagouaroundi, mantidos em cativeiro, foram sedados com uma associação dexilazina (1 a 2 mg/kg) e quetamina (10 mg/kg), pela via intramuscular. O traçado eletrocardiográfico foi registrado e padronizado,em todas as derivações, na sensibilidade 1 cm = 1 mV e na velocidade 25 mm/s, repetindo-se a derivação DII à velocidade de50 mm/s com mesma sensibilidade. Os resultados obtidos, expressos em média e desvio-padrão, foram FC: 90,952±17,293(bpm); onda P: 0,030±0,006 (s) X 0,100±0,027 (mV); intervalo PR: 0,089±0,014 (s); complexo QRS: 0,047±0,007 (s) X 1,076±0,451(mV); intervalo QT: 0,237±0,025 (s); onda R (CV6LL): 1,067±0,549 (mV); onda R (CV6LU): 0,836±0,682 (mV); RC: ritmo sinusalnormal (19%), ritmo sinusal com marcapasso migratório (4,7%), arritmia sinusal (33%), arritmia sinusal com marcapassomigratório (43%); eixo elétrico: +60° a +90° (48%), +90° (4,5%), +90° a +120° (43%), +120° (4,5%); segmento ST: sem desnível(90%), supradesnível (10%); polaridade da onda T (DII): positiva (95%), negativa (5%); onda T (V10): negativa (90%) e interferente(10%). Alguns animais da espécie estudada apresentaram valores de amplitude da onda R indicativos de sobrecarga deventrículo esquerdo, segundo os valores padronizados como normais para felinos domésticos. Exames ecocardiográfico eradiográfico dos mesmos animais demonstraram que o posicionamento cardíaco em relação à caixa torácica era responsávelpela variação de amplitude da onda R

Twenty one captivity H. yagoaroundi anesthetized with xilazyn (1 to 2 mg/kg) and ketamyn (10 mg/kg) were used in this study. TheECG tests were registered in all leads with 1cm = 1mV sensibility and 25mm/s speed, repeating the DII lead at the 50mm/sspeed with the same sensibility. The results, expressed by mean and standard deviation, were: heart rate = 90,952±17,293(bpm); P wave = 0,030±0,006 (s) X 0,100±0,027 (mV); PR interval = 0,089±0,014 (s); QRS complex = 0,047±0,007 (s) X1,076±0,451 (mV); QT interval = 0,237±0,025 (s); R wave (CV6LL) = 1,067±0,549 (mV); R wave (CV6LU) = 0,836±0,682 (mV);heart rhythm = normal sinus rhythm (19%), sinus rhythm with WPM (4,7%), sinus arrythmia (33%), sinus arrythmia with WPM(43%); electric axis = +60° a +90° (48%), +90° (4,5%), +90° a +120° (43%), +120° (4,5%); ST segment = no depression orelevation (90%), elevation (10%); T wave polarity (DII) = positive (95%), negative (5%); V10 (T wave) = negative (90%), andinterferent (10%). Some of the studied animals presented R wave amplitude that was indicative of left ventricle overload,according to the patterns for normal domestic cats. Echocardiographic and radiographic exams revealed different heart positionin the thorax, explaining the R wave amplitude variation