Table 1.

Baseline characteristics of 114 dogs affected with degenerative mitral valvular disease according to the modified New York Heart Association (NYHA) functional classification.

Characteristic	NYHA II (n = 38)	NYHA III (n = 46)	NYHA IV (n = 30)
Age, years	9.5 ± 3.5	11.6 ± 2.7†	12.3 ± 3.1†
Number of females/number of males	24/14	22/24	15/15
Body weight, kg	5.4 ± 2.4	5.8 ± 3.7	5.3 ± 2.7
Heart rate, beats per minute	114 ± 26	131 ± 26†	135 ± 27†‡
Blood pressure, mmHg	142 ± 23	136 ± 23	122 ± 19†
Vertebral heart scale	9.9 ± 0.9	10.9 ± 0.5†	12.5 ± 0.4†‡
LA/Ao	1.6 ± 0.3	1.9 ± 0.3†	2.5 ± 0.4†‡
Median survival (95% CI), months	42 (33.7–50.3)	26 (21.3–30.7)	7 (3.6–10.4)

Data are presented as mean ± SD or median (95% confidence interval [CI]).

LA/Ao, left atrium to aorta ratio.

^† p < 0.05 versus class II; ^‡ p < 0.05 versus class III.