Correlation between cardiac rate and P axis in the normal electrocardiogram.
D000328:Adult; D001919:Bradycardia / Q000503:physiopathology; D004562:Electrocardiography; D006339:Heart Rate; D006801:Humans; D008875:Middle Aged; D012849:Sinoatrial Node / Q000502:physiology; D013610:Tachycardia / Q000503:physiopathology