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Queensland News - Australian Veterinary Association

Queensland News - Australian Veterinary Association

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AVA <strong>Queensland</strong> <strong>News</strong> - August 2009Continued from pg. 17The height of each deflection is measured in millivolts (mV). The ECG machine will have a calibration switchthat will demonstrate the height of a 1mV deflection. This is usually set at 1 cm = 1 mV.6.3 Some examples of common arrhythmias:Figure 2: Supraventricular Premature Complexes (SVPCs). P denotes the premature complex. Each sinus complex isfollowed by a premature complex, in a bigeminal rhythm.Figure 3: Atrial FibrillationThis rhythm is present in a dog with dilated cardiomyopathy. The ventricular rate has been slowed to an average of 160bpm with digoxin.Figure 4: Ventricular Premature Complexes (VPCs)This ECG is from a dog with pancreatitis and associated myocarditis. The second complex is a VPC, the fifth complexis a fusion complex.Figure 5: Ventricular Tachycardia (VT)Multiform VT at 180 bpm from a dog with gastric dilation.Acknowledgements:Thanks to Dr Fiona Campbell, Anita Parkin VN, Michelle Kleinschmidt VN, Penny Murphy VN, Rebecca SmartVN for assistance with preparation of these notes. ECG Traces from Tilley: Essentials of Electrocardiographyof the Dog and Cat.18

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