P Lord1, K Hansson, C Kvart, J Häggström. 1. Department of Clinical Sciences, Swedish University of Agricultural Sciences, Uppsala S750 07, Sweden.
Abstract
OBJECTIVES: The objective of the study was to examine the changes in vertebral heart scale, and left atrial and ventricular dimensions before and at onset of congestive heart failure in cavalier King Charles spaniels with mitral regurgitation. METHODS: Records and radiographs from 24 cavalier King Charles spaniels with mitral regurgitation were used. Vertebral heart scale (24 dogs), and left atrial dimension and left ventricular end diastolic and end systolic diameters (18 dogs) and their rate of increase were measured at intervals over years to the onset of congestive heart failure. They were plotted against time to onset of congestive heart failure. RESULTS: Dimensions and rates of change of all parameters were highest at onset of congestive heart failure, the difference between observed and chance outcome being highly significant using a two-tailed chi-square test (P<0.001). CLINICAL SIGNIFICANCE: The left heart chambers increase in size rapidly only in the last year before the onset of congestive heart failure. Increasing left ventricular end systolic dimension is suggestive of myocardial failure before the onset of congestive heart failure. Rate of increase of heart dimensions may be a useful indicator of impending congestive heart failure.
OBJECTIVES: The objective of the study was to examine the changes in vertebral heart scale, and left atrial and ventricular dimensions before and at onset of congestive heart failure in cavalier King Charles spaniels with mitral regurgitation. METHODS: Records and radiographs from 24 cavalier King Charles spaniels with mitral regurgitation were used. Vertebral heart scale (24 dogs), and left atrial dimension and left ventricular end diastolic and end systolic diameters (18 dogs) and their rate of increase were measured at intervals over years to the onset of congestive heart failure. They were plotted against time to onset of congestive heart failure. RESULTS: Dimensions and rates of change of all parameters were highest at onset of congestive heart failure, the difference between observed and chance outcome being highly significant using a two-tailed chi-square test (P<0.001). CLINICAL SIGNIFICANCE: The left heart chambers increase in size rapidly only in the last year before the onset of congestive heart failure. Increasing left ventricular end systolic dimension is suggestive of myocardial failure before the onset of congestive heart failure. Rate of increase of heart dimensions may be a useful indicator of impending congestive heart failure.
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Authors: Adrian Boswood; Sonya G Gordon; Jens Häggström; Martin Vanselow; Gerhard Wess; Rebecca L Stepien; Mark A Oyama; Bruce W Keene; John Bonagura; Kristin A MacDonald; Mark Patteson; Sarah Smith; Philip R Fox; Karen Sanderson; Richard Woolley; Viktor Szatmári; Pierre Menaut; Whitney M Church; M Lynne O'Sullivan; Jean-Philippe Jaudon; Jan-Gerd Kresken; John Rush; Kirstie A Barrett; Steven L Rosenthal; Ashley B Saunders; Ingrid Ljungvall; Michael Deinert; Eric Bomassi; Amara H Estrada; Maria J Fernandez Del Palacio; N Sydney Moise; Jonathan A Abbott; Yoko Fujii; Alan Spier; Michael W Luethy; Roberto A Santilli; Masami Uechi; Anna Tidholm; Christoph Schummer; Philip Watson Journal: J Vet Intern Med Date: 2020-03-22 Impact factor: 3.333