the second group of six rats , which were subjected to total body hypothermia developed arrhythmia ( from first degree atrioventricular block to complete heart block ) at a mean rectal temperature of 18 degrees c. , with prolongation of p , p-r , and qrs duration , as well as a marked separation of intercalated discs , articularly at the level of the fascia adherens .
C0003811
arrhythmia
C0085614
first