title: ECG of the month. Weakness and near syncope in a 79-year-old woman. Sinus bradycardia and arrhythmia, high-grade second degree atrioventricular (AV) block.
authors.affiliation: Louisiana State University Health Sciences Center, New Orleans, USA.
authors.forename: Kian
authors.initials: K
authors.lastname: Ehsan
authors.forename: Glenn M
authors.initials: GM
authors.lastname: Johnson
authors.forename: D Luke
authors.initials: DL
authors.lastname: Glancy
mesh_terms: D000368:Aged; D054537:Atrioventricular Block / Q000139:chemically induced / Q000150:complications / Q000175:diagnosis* / Q000503:physiopathology; D001283:Atrioventricular Node / Q000187:drug effects; D001919:Bradycardia / Q000139:chemically induced / Q000150:complications / Q000175:diagnosis* / Q000503:physiopathology; D002317:Cardiovascular Agents / Q000008:administration & dosage / Q000009:adverse effects; D003000:Clonidine / Q000008:administration & dosage / Q000009:adverse effects*; D004077:Digoxin / Q000008:administration & dosage / Q000009:adverse effects*; D004110:Diltiazem / Q000008:administration & dosage / Q000009:adverse effects*; D004562:Electrocardiography / Q000379:methods*; D005221:Fatigue / Q000209:etiology / Q000503:physiopathology; D005260:Female; D006801:Humans; D013575:Syncope / Q000209:etiology / Q000503:physiopathology
chemical_list: D002317:Cardiovascular Agents; D004077:Digoxin; D004110:Diltiazem; D003000:Clonidine