Iowa State University Veterinarian Records, RS 22/6/0/9, University Archives, Special Collections Department, Iowa State University, http://www.add.lib.iastate.edu/spcl/arch/rgrp/22-6-0-9.html
A 9-month-old male German Shepherd dog was examined for decreased exercise tolerance, enlargement of the abdomen, and groaning when forced to move. The signs developed over a 3 week period. Ausculation of the thorax revealed muffled heart sounds. The EKG recordings had markedly decreased amplitude, with intermittent premature ventricular contractions.
Mitten, Russell and Novotny, Mark J.
"What's Your Radiographic Diagnosis?,"
Iowa State University Veterinarian: Vol. 41
, Article 11.
Available at: https://lib.dr.iastate.edu/iowastate_veterinarian/vol41/iss1/11