title: ECG of the month. No crystal ball. Sinus rhythm; notched P waves.
authors: Dept of Medicine, Texas Tech Regional Academic Health Center, El Paso.
authors: J I
authors: JI
authors: Martinez-Lopez
mesh_terms: D000368:Aged; D006332:Cardiomegaly / Q000175:diagnosis*; D004562:Electrocardiography; D006325:Heart Atria; D006801:Humans; D008297:Male; D011237:Predictive Value of Tests; D012849:Sinoatrial Node / Q000503:physiopathology*