Age-specific changes in electrocardiographic parameters in bipolar limb leads of conscious female native cats of Odisha.

Subhashree Sarangi,S Mohapatra,A K Kundu,A P K Mahapatra

doi:10.14202/vetworld.2016.147-150

Subhashree Sarangi, S Mohapatra + Show 2 more

Open Access

https://doi.org/10.14202/vetworld.2016.147-150

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Abstract

Aim:To study and compare the age-specific changes in electrocardiographic (ECG) parameters in bipolar limb leads of conscious female native cats of Odisha.Materials and Methods:20 healthy female native cats aged between 4 and 36 months of age were selected for the study. These queens were divided into two groups of 10 animals each. Group 1 constituted the queens aged 4-10 months (before puberty) with a mean weight of 2.28 kg (±0.4 standard error [SE]), and those aged 11-36 months (after puberty) with a mean weight of 3.72 kg (±0.6 SE) were in Group 2. The ECG was recorded with a 12-lead standard ECG recorder, Cardiart 108 T-MK VII-BPL (India) in the Leads I, II, and III.Results:The mean heart rates were 160.73 (±7.83) beats/min and 139.09 (±2.72) beats/min in the cats aged 4-10 months and 11-36 months, respectively. Significant differences existed among Q- and R-wave amplitudes and duration of QT-interval in Lead I. In Lead II, duration of QT and RR intervals, duration of ST-segment and amplitudes of P- and R-waves varied significantly. Significant differences were also observed in the P- and R-wave amplitudes in Lead III. The mean electrical axis was 63.11 (±1.98°) and 50.03 (±4.86°) in the cats aged 4-10 months and 11-36 months, respectively.Conclusion:Since the ECG studies on conscious cats are scanty, and the number of native cats being presented in veterinary hospitals and clinics has increased drastically, there is a need to establish the reference values for ECG parameters in conscious native cats so that the cardiovascular abnormalities can be predicted.

Highlights

The domestic cat has a long history as a research subject; stray cats were used as research subjects by Claude Bernard and others during the early years of experimental medicine, their small size and availability making them popular candidates for both medical and surgical explorations
Since the ECG studies on conscious cats are scanty, and the number of native cats being presented in veterinary hospitals and clinics has increased drastically, there is a need to establish the reference values for ECG parameters in conscious native cats so that the cardiovascular abnormalities can be predicted
The P-R interval, measured from the beginning of the P-wave to the beginning of the QRS complex, represents the time required for the Figure-1: Position while recording of the electrocardiogram in a conscious female native cat of Odisha

Summary

Introduction

The domestic cat has a long history as a research subject; stray cats were used as research subjects by Claude Bernard and others during the early years of experimental medicine, their small size and availability making them popular candidates for both medical and surgical explorations. These have been used extensively for neurological research, brain and vision studies as well as for toxicology and endocrinology experiments. Electrocardiogram (ECG) is the recording of the potentials generated by the electrical current due to the passage of cardiac impulses through the heart. The ECG studies on cats are scanty, and those made earlier

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