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Periódicos Brasileiros em Medicina Veterinária e Zootecnia

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Twenty-four hour ambulatory electrocardiography (Holter monitoring) in normal unsedated cats

Lie Yamaki, FernandaCristina Soares, ElaineGonçalves Pereira, GuilhermeJun Yamato, RonaldoGallatti, LucianaSandoli de Brito, FabioLeomil Neto, MoacirHelena Matiko Akao Larsson, Maria

Background: Standard electrocardiogram (ECG) performed during a clinical examination has a limited ability to detect many arrhythmias. Holter or 24-h ambulatory electrocardiography (AECG) is the most sensitive non-invasive test for demonstrating transient arrhythmias, that allows continuous recording of cardiac electrical activity while the patient is engaged in normal daily activities. This study was undertaken to define 24-h AECG parameters, including variations in heart rate, and the types and incidence of arrhythmias in clinically normal adult cats to provide a baseline for comparison for cats suspected of having cardiac diseases.Materials, Methods & Results: Twenty clinically normal adult cats, with an equal number of males and females, weighting from 2.8 to 7.6 kg (mean 4.10 ± 1.22), were used. All animals had no historical or clinical evidence of systemic diseases, with unremarkable physical examination, and with no alterations on either thoracic radiography, electrocardiographic, and echocardiographic evaluations, as well as on clinical pathology or blood pressure measurement. Ambulatory electrocardiographic recording was performed for 24-h, with a 3-lead, modified bipolar, transthoracic system. The owner was requested to keep a diary to record the time of exercising, feeding, and other behaviours. The records were analysed using a microprocessor. In the current stu

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