title: Respiratory rate as a determinant of optimal pacing rate.
abstract: Efforts have been made to utilize biologic parameters for determining optimal cardiac pacing rates. In this study of 67 patients, a significant relationship between heart rate and respiratory rate was observed during dynamic exercise. A system using a radiofrequency activator to modify pacing rate is described. Eleven patients have received VVI pacemakers with a similar implanted radio receiver coil. In two patients the fully automatic system has been successfully implanted. The experience with respiratory rate as a determinant of pacing rate is encouraging.
mesh_terms: D000368:Aged; D004553:Electric Conductivity; D005080:Exercise Test; D005260:Female; D006327:Heart Block / Q000150:complications / Q000503:physiopathology* / Q000628:therapy; D006339:Heart Rate; D006801:Humans; D008173:Lung Diseases, Obstructive / Q000150:complications / Q000175:diagnosis / Q000503:physiopathology*; D008297:Male; D008875:Middle Aged; D010101:Oxygen Consumption; D010138:Pacemaker, Artificial; D012119:Respiration