title: Diurnal variations of blood pressure in cats.
abstract: Blood pressure (BP) was analyzed invasively using the telemetry system in unanesthetized, unrestrained healthy adult mongrel cats. After surgical implantation of a telemetry transmitter, BP was transiently elevated due to the invasive nature of the surgery, but it was gradually decreased. BP was largely stabilized seven to ten days postsurgery. Once BP was settled, systolic, diastolic and mean BPs(2) were obtained at 5-min intervals in individual cats. Hourly averages of these BP values revealed a diurnal variation with two peaks at 8:00 and 19:00. We also found that BP was significantly higher when cats were active compared to when they were sleeping or at rest (p<0.05). The average 24-hr BP in 20 healthy cats was 118.4+/-11.0 (systolic), 78.0+/-8.7 (diastolic) and 94.8+/-9.5 mmHg (mean) by the telemetry system.
authors.affiliation: Department of Nephrology and Urology, Veterinary Teaching Hospital, Azabu University, Kanagawa 229-8501, Japan.
authors.forename: Mika
authors.initials: M
authors.lastname: Mishina
authors.forename: Nobuyoshi
authors.initials: N
authors.lastname: Watanabe
authors.forename: Toshifumi
authors.initials: T
authors.lastname: Watanabe
mesh_terms: D000818:Animals; D001794:Blood Pressure / Q000502:physiology*; D001795:Blood Pressure Determination / Q000379:methods / Q000662:veterinary; D002415:Cats / Q000502:physiology*; D002940:Circadian Rhythm / Q000502:physiology*; D005260:Female; D008297:Male; D013686:Telemetry / Q000662:veterinary