VENTRICULAR ECTOPIC BEATS WITH  FIXED AND VARIABLE COUPLING. INCIDENCE, CLINICAL SIGNIFICANCE AND FACTORS INFLUENCING THE COUPLING INTERVAL.
D001145:Arrhythmias, Cardiac; D001161:Arteriosclerosis; D004562:Electrocardiography; D006333:Heart Failure; D006343:Heart Septal Defects; D006344:Heart Septal Defects, Atrial; D006801:Humans; D006973:Hypertension; D015994:Incidence; D012214:Rheumatic Heart Disease; D013575:Syncope; D018879:Ventricular Premature Complexes
ARRHYTHMIA; ARTERIOSCLEROSIS; ELECTROCARDIOGRAPHY; HEART FAILURE, CONGESTIVE; HEART SEPTAL DEFECTS, ATRIAL; HYPERTENSION; RHEUMATIC HEART DISEASE; SYNCOPE