title: New Cause of Presystolic Drag: Long PR Extrasystoles.
authors.affiliation: Servicio de Cardiología, Hospital General Universitario Santa Lucía, Cartagena, Murcia, Spain. Electronic address: jc_bonaque@hotmail.es.
authors.forename: Juan C
authors.initials: JC
authors.lastname: Bonaque
authors.affiliation: Servicio de Cardiología, Hospital General Universitario Santa Lucía, Cartagena, Murcia, Spain.
authors.forename: Ramón
authors.initials: R
authors.lastname: Rubio-Patón
authors.affiliation: Servicio de Cardiología, Hospital General Universitario Santa Lucía, Cartagena, Murcia, Spain.
authors.forename: Juan A
authors.initials: JA
authors.lastname: Castillo
mesh_terms: D000369:Aged, 80 and over; D001022:Aortic Valve Insufficiency / Q000175:diagnosis / Q000209:etiology*; D005117:Cardiac Complexes, Premature / Q000150:complications* / Q000175:diagnosis; D004452:Echocardiography; D004562:Electrocardiography; D006801:Humans; D008297:Male; D013599:Systole