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Electrocardiographic changes in normal and abnormal canine pregnancy.
P G Blanco1, P R Batista, N E Re
1National University of La Plata, La Plata, Argentina. pgblanco@gmail.com
Reproduction in Domestic Animals = Zuchthygiene
|July 14, 2011
Summary
Canine pregnancy alters electrocardiographic parameters, with normal pregnancies showing changes from day 40. Abnormal canine pregnancies can be identified by day 30 using electrocardiography, aiding early detection of complications.
Area of Science:
- Veterinary Cardiology
- Reproductive Physiology in Canines
Background:
- Electrocardiography (ECG) is crucial for assessing cardiac function.
- Canine pregnancy involves physiological changes that may affect cardiovascular parameters.
- Distinguishing normal from abnormal pregnancy early is vital for timely intervention.
Purpose of the Study:
- To document electrocardiographic (ECG) changes during normal and abnormal canine pregnancy.
- To identify ECG patterns indicative of pathological gestation.
- To explore the utility of ECG in canine obstetrics.
Main Methods:
- Retrospective analysis of ECGs from 23 Brucellosis-negative pregnant bitches (12 normal, 11 abnormal) and 10 non-pregnant controls.
- ECG evaluations were performed every 10 days from day 0 to day 65.
- Parameters analyzed included heart rate, QRS complex amplitude and duration, and corrected QT interval.
Main Results:
- Normal pregnancies showed a 31.3% increase in heart rate between days 40-60, unlike abnormal pregnancies.
- Abnormal pregnancies exhibited a -34% change in QRS amplitude on day 60.
- Corrected QT interval increased in normal pregnancies from day 40 but remained unchanged in abnormal cases.
Conclusions:
- Normal canine pregnancy induces specific ECG changes starting around day 40.
- Abnormal canine gestations demonstrate distinct ECG alterations detectable from day 30.
- Electrocardiography shows potential for early identification of adverse pregnancy outcomes in dogs.
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