Differential study of electrocardiographic intervals in two neonatal crossbred swine

M. Dolores Rubio From the Department of Animal Biology, Section of Physiology, University of Córdoba, 14071 Cordoba, Spain.

Search for other papers by M. Dolores Rubio in
Current site
Google Scholar
PubMed
Close
 PhD
,
Pura Tovar From the Department of Animal Biology, Section of Physiology, University of Córdoba, 14071 Cordoba, Spain.

Search for other papers by Pura Tovar in
Current site
Google Scholar
PubMed
Close
 PhD
,
Rafael Santisteban From the Department of Animal Biology, Section of Physiology, University of Córdoba, 14071 Cordoba, Spain.

Search for other papers by Rafael Santisteban in
Current site
Google Scholar
PubMed
Close
 PhD
,
Manoel de Oliveira From the Department of Animal Biology, Section of Physiology, University of Córdoba, 14071 Cordoba, Spain.

Search for other papers by Manoel de Oliveira in
Current site
Google Scholar
PubMed
Close
 PhD
, and
Francisco Castejón From the Department of Animal Biology, Section of Physiology, University of Córdoba, 14071 Cordoba, Spain.

Search for other papers by Francisco Castejón in
Current site
Google Scholar
PubMed
Close
 PhD

Click on author name to view affiliation information

SUMMARY

The influence of the QT, TQ, and ST intervals, and heart score on both cardiac cycle duration (RR) and diastole/systole (D/S) quotient were analyzed during the neonatal (1 day and 5 days) pigs belonging to 2 crossbreeds of different rusticity, Landrace × Belgian White (LBW) and Landrace × Duroc Jersey (LDJ). Our findings indicate that the shortening of the RR interval in 5-day-old pigs of both crossbreeds was determined by different variables in each breed. In LDJ pigs, this shortening was only associated with a shortening of ventricular activation, and in each age group, the systole and the diastole contributed equally to the RR value. The D/S quotient did not differ significantly in 1-day-old vs 5-day-old pigs, and at both ages, the quotient was only determined by the TQ value. In LBW pigs, the RR, QT, TQ, and ST were shortened, but only the shortening of QT was significant as a result of an acceleration of the ventricular recuperation process. Moreover, differences were found between 1-day-old vs 5-day-old pigs with regard to the contribution of the different intervals to the RR duration. In 1-day-old pigs, the RR depended closely on the TQ, whereas in 5-day-old pigs, all intervals contributed significantly to its duration. The D/S quotient was not significantly different in 1-day-old vs 5-day-old pigs, but a different contribution of the variables studied was observed at the 2 ages selected. In 1-day-old pigs, D/S quotient depended on the diastole duration, whereas in 5-day-old pigs, the diastole and systole contributed to its variation.

SUMMARY

The influence of the QT, TQ, and ST intervals, and heart score on both cardiac cycle duration (RR) and diastole/systole (D/S) quotient were analyzed during the neonatal (1 day and 5 days) pigs belonging to 2 crossbreeds of different rusticity, Landrace × Belgian White (LBW) and Landrace × Duroc Jersey (LDJ). Our findings indicate that the shortening of the RR interval in 5-day-old pigs of both crossbreeds was determined by different variables in each breed. In LDJ pigs, this shortening was only associated with a shortening of ventricular activation, and in each age group, the systole and the diastole contributed equally to the RR value. The D/S quotient did not differ significantly in 1-day-old vs 5-day-old pigs, and at both ages, the quotient was only determined by the TQ value. In LBW pigs, the RR, QT, TQ, and ST were shortened, but only the shortening of QT was significant as a result of an acceleration of the ventricular recuperation process. Moreover, differences were found between 1-day-old vs 5-day-old pigs with regard to the contribution of the different intervals to the RR duration. In 1-day-old pigs, the RR depended closely on the TQ, whereas in 5-day-old pigs, all intervals contributed significantly to its duration. The D/S quotient was not significantly different in 1-day-old vs 5-day-old pigs, but a different contribution of the variables studied was observed at the 2 ages selected. In 1-day-old pigs, D/S quotient depended on the diastole duration, whereas in 5-day-old pigs, the diastole and systole contributed to its variation.

All Time Past Year Past 30 Days
Abstract Views 0 0 0
Full Text Views 24 24 5
PDF Downloads 4 4 1
Advertisement