[Estimating sinus node function by measuring the effective refractory period of the sinus node].
D000818:Animals; D004285:Dogs; D004562:Electrocardiography; D004594:Electrophysiology; D005260:Female; D008297:Male; D009431:Neural Conduction; D012032:Refractory Period, Electrophysiological; D012804:Sick Sinus Syndrome / Q000503:physiopathology*; D012849:Sinoatrial Node / Q000503:physiopathology*