Variations in cardiac excitability: evidence from P wave synchrony studies.
D006328:Cardiac Catheterization; D004558:Electric Stimulation; D004562:Electrocardiography; D006329:Heart Conduction System / Q000502:physiology*; D006801:Humans; D011656:Pulmonary Emphysema; D012214:Rheumatic Heart Disease; D014927:Wolff-Parkinson-White Syndrome / Q000209:etiology