Table 1.

Clinical, echocardiographic, and radiographic data of all dogs (n = 63)

	Stage B1 (n = 15)	Stage B2 (n = 18)	Stage C (n = 20)
Male/Female	7/8	11/7	20/10
Age (years)	11.5 (6.0–15.0)	11 (6.0–16.0)	11 (5.0–18.0)
BW (kg)	12 (3.5–40.0)	10 (4.5–27.0)	9 (3.7–37.0)
LA/Ao	1.39 (1.00–1.50)	1.8 (1.60–2.80)a	2.3 (1.75–3.68)a , b
Emax (m/s)	0.89 (0.66–1.02)	0.98 (0.40–2.04)	1.51 (0.66–2.30)a , b
E/A ratio	1.33 (0.75–1.65)	1.10 (0.70–3.00)	2.04 (0.67–4.20)a , b
LVIDDn	1.48 (1.25–1.85)	1.87 (1.39–2.34)a	2.21 (1.63–2.86)a , b
PE (%)	0 (0%)	0 (0%)	20 (66.7%)a , b

BW, body weight; LA/Ao, left atrium to aortic root ratio; Emax, peak velocity of E wave of the transmitral flow; E/A, E wave to A wave ratio of the transmitral flow; LVIDDn, normalized left ventricular internal diameter in diastole; PE, pulmonary edema.

Data are expressed as the median (range) or number (percentage).

^a P < .05 as compared to stage B1.

^b P < .05 as compared to stage B2.