[Respiration and blood circulation in the terminal stages of deep hypothermia].
In immersion hypothermia (9 degrees C) the brain temperature was 2 degrees higher on the average than in the heart area and 3-4 degrees C higher than rectal temperature in rats. At the brain temperature below 24-25 degrees C a strong dependence of the respiration rate on the body temperature occurs followed by the same dependence for the heart rate and arterial pressure. Arrest of the respiration occurs at the brain temperature 18 degrees C on the average, heart arrest occurs within 31 min on the average (at the heart temperature 11 degrees C). The main hypothermic pathogenetic factor is a direct effect of the cold on the brain and heart added by hypoxia due to weakening and arrest of respiration.
Aliukhin
Iu S
IuS
D000818:Animals; D001775:Blood Circulation / Q000502:physiology*; D001794:Blood Pressure / Q000502:physiology; D001831:Body Temperature / Q000502:physiology; D004195:Disease Models, Animal; D006339:Heart Rate / Q000502:physiology; D007035:Hypothermia / Q000503:physiopathology*; D007101:Immersion / Q000503:physiopathology; D051381:Rats; D012119:Respiration / Q000502:physiology*; D013696:Temperature; D013997:Time Factors