Study on the perioperative changes of blood pressure, heart rateand heart rate variability in dogs

摘要

The average lifespan of pet animals has been extended due to continuous development in veterinary medicine and in the quality of emotional and physical care by pet owners in recent years. The major cause of pet mortality is tumors induced by aging. Infact, 45% of dogs older than10 yr old died of cancers. The highest morbidity rate in female dogs has been due to to mammary gland tumors (MGT), and the median age of disease induction registers 10-11 yr. Although the first choice of treatment for MGT is complete tumor resection, postoperative algesia/nociception-induced stress has been reported to increase sympathetic nervous activity to eventuate blood pressure (BP) and heart rate (HR) elevations.