ECG of the month.
D000818:Animals; D004283:Dog Diseases / Q000503:physiopathology*; D004285:Dogs; D004562:Electrocardiography / Q000662:veterinary*; D005260:Female; D006338:Heart Neoplasms / Q000503:physiopathology / Q000662:veterinary*; D010236:Paraganglioma, Extra-Adrenal / Q000503:physiopathology / Q000662:veterinary*