Table 3

Tricuspid annular motion assessed by M mode echocardiography

Position		Normal subjects				ARVC patients
Position		Total amplitude (mm)	Atrial amplitude (mm)			Total amplitude (mm)	Atrial amplitude (mm)
Lateral	25.9 (2.8)	7.5 (2.2)			22.1 (5.5)^3-160	8.0 (1.8)
(n)	(24)	(24)			(15)	(15)

Septal	15.9 (2.1)	4.4 (0.9)			13.6 (2.2)^3-150	4.8 (0.8)
(n)	(15)	(15)			(9)	(9)

Posterior	21.5 (2.7)	5.9 (1.5)			18.2 (5.5)^3-150	6.5 (1.7)
(n)	(21)	(21)			(14)	(13)

Anterior	22.0 (2.1)	7.0 (1.9)			21.3 (4.8)	8.3 (2.1)^3-150
(n)	(23)	(23)			(15)	(15)

Data are mean (SD).
↵3-150 p < 0.05;
↵3-160 p < 0.01 for comparisons between patients and normal subjects.
ARVC, arrhythmogenic right ventricular cardiomyopathy; n, number of measurements at different positions.