TABLE 3.

Echocardiographic data at time of congestive heart failure diagnosis for 260 cats treated with pimobendan, comparing cats with vs without outflow tract obstruction and cats with primary HCM vs primary HOCM

	Nonobstructive vs obstructive			Primary HCM vs HOCM
Variable	No OTO	OTO	P value	HCM	HOCM	P value
N	203	57	…	120	51	…
IVSd (cm)	0.56 ± 0.13	0.66 ± 0.15	<.0001*	0.62 ± 0.12	0.67 ± 0.16	.08
LVIDd (cm)	1.58 (0.42)	1.45 (0.40)	.0024*	1.48 (0.40)	1.40 (0.40)	.32
LVPWd (cm)	0.59 (0.27)	0.71 (0.28)	<.0001*	0.70 ± 0.19	0.75 ± 0.17	.095
FS (%)	42.3 ± 15.4	48.2 ± 11.7	.0022*	48.0 ± 12.9	48.3 ± 11.8	.86
LA : Ao	2.10 (0.59)	2.17 (0.63)	.69	2.01 (0.57)	2.21 (0.69)	.09
Mitral regurgitation (n, %)	146 (71.9%)	48 (84.2%)	.08	73/102 (71.6%)	44/51 (86.3%)	.046*
Spontaneous echocontrast (n, %)	30 (14.9%)	11 (19.3%)	.42	17/102 (16.7%)	11/51 (21.6%)	.51
LA thrombus (n, %)	11 (5.5%)	2 (3.5%)	.74	6/102 (5.9%)	2/51 (3.9%)	.72

Note: Data are presented as mean ± SD for continuous normally distributed data, median (IQR) for continuous non‐normally distributed data, and number (percent) for categorical variables. The number of cats with data included is noted as denominator values for variables with incomplete data sets. Significant differences between groups (P < .05) are denoted in bold and with an asterisk (*).

Abbreviations: Ao, aorta; FS, fractional shortening; HCM, hypertrophic cardiomyopathy; HOCM, hypertrophic obstructive cardiomyopathy; IVSd, interventricular septal thickness in diastole; LA, left atrium; LVIDd, left ventricular internal diameter in diastole; LVPWd, left ventricular posterior wall thickness in diastole; OTO, outflow tract obstruction.