Table 2.
Demographic and arrhythmia frequency data in 131 Borzoi, separated by echocardiographic diagnosis.
| Echocardiographic diagnosis | Number of dogs (%) | Age (years) | Sex (M/F/U) | N (%) of dogs with ventricular arrhythmias | N (%) of dogs with supraventricular arrhythmias |
|---|---|---|---|---|---|
| Structurally normal | 85/131 (65%) | 4.2 (0.2–11.6) | 38/40/7 | 14/85 (16%) | 8/85 (9%) |
| DCM total | 13/131 (10%) | 5.7 (0.4–9.7) | 9/4/0 | 6/13 (46%) | 4/13 (31%) |
| DCM: equivocal | 4/131 (3%) | 3.4 (1–5.7) | 2/2/0 | 2/4 (50%) | 0/4 (0%) |
| DCM: occult | 7/131 (5%) | 7 (5–8) | 5/2/0 | 3/7 (43%) | 2/7 (29%) |
| DCM: overt | 2/131 (2%) | 5 (0.4–9.7) | 2/0/0 | 1/2 (50%) | 2/2 (100%) |
| MMVD total | 12/131 (9 %) | 8.2 (4–10.9) | 3/9/0 | 3/12 (25%) | 2/12 (17%) |
| MMVD: stage B1 | 11/131 (8%) | 8.2 (4–10.9) | 3/8/0 | 3/11 (27%) | 2/11 (18%) |
| MMVD: stage B2 | 0/131 (0%) | N/A | N/A | N/A | N/A |
| MMVD: stage C | 1/131 (1%) | 8 | 0/1/0 | 0/1 (0%) | 0/1 (0%) |
| Congenital disease total | 19/131 (15%) | 2 (0.2–6) | 8/10/1 | 2/19 (11%) | 0 (0%) |
| TVD | 4/131 (3%) | 2 (1–3) | 4/0/0 | 1/4 (25%) | 0/4 (0%) |
| Patent ductus arteriosus | 4/131 (3%) | 0.5 (0.2–2) | 1/3/0 | 0/4 (0%) | 0/4 (0%) |
| MVD | 3/131 (2%) | 1 (1–4.6) | 1/2/0 | 1/3 (33%) | 0/3 (0%) |
| TVD and MVD | 2/131 (2%) | 1 | 0/1/1 | 0/2 (0%) | 0/2 (0%) |
| Equivocal TVD | 5/131 (4%) | 4 (1.2–6) | 2/3/0 | 0/5 (0%) | 0/5 (0%) |
| Pulmonic stenosis | 1/131 (1%) | 6 | 0/1/0 | 0/1 (0%) | 0/1 0%) |
| Cardiac neoplasia | 3/131 (2%) | 8.8 (7–9.6) | 3/0/0 | 0/3 (0%) | 0/3 (0%) |
Age is presented as median (range). DCM, dilated cardiomyopathy; F, female; M, male; MMVD, myxomatous mitral valve disease; MVD, mitral valve dysplasia; N/A, not applicable; TVD, tricuspid valve dysplasia; U, unknown sex.