Table 3.

Reproducibility analyses for peak longitudinal strain rate¹

Table 3: Reproducibility analyses for peak longitudinal systolic and diastolic strain rate
	Frame rate/ Heart rate	Mean ± SD	Intra-observer analyses					Inter-observer analyses
	(frames/s/bpm)	(1/s)	Bland Altman		CV	Linear Correlation		Bland Altman		CV	Linear Correlation
RV Logitudinal Systolic Strain Rate			Bias (%)	LOA	(%)	r	p value	Bias (%)	LOA	(%)	r	p value
<90 frames/ sec	<0.5	−2.0 ± 0.4	16	−0.6 - 0.6	11	0.69	0.0005	20	−0.84 - 0.88	15	0.41	0.07
90-110 frames/ sec	0.5-0.7	−2.0 ± 0.3	6	−0.2 - 0.3	5	0.93	<0.0001	9	−0.39 - 0.43	7	0.83	0.0006
110-130 frames/sec	0.7-0.9	−2.1 ± 0.4	5	−0.3 - 0.3	5	0.93	<0.0001	9	−0.48 - 0.52	9	0.76	<0.0001
< 130 frames/sec	<0.9	−2.2 ± 0.4	4	−0.3 - 0.23	4	0.96	<0.0001	6	−0.40 - 0.44	8	0.99	<0.0001
LV Longitudinal Systolic Strain Rate
<90 frames/ sec	<0.5	−1.9 ± 0.4	13	−0.6 - 0.6	12	0.67	0.001	16	−0.61 - 0.65	13	0.63	0.003
90-110 frames/ sec	0.5-0.7	−1.8 ± 0.3	13	−0.6-0.6	12	0.39	0.09	17	−0.62 - 0.66	15	0.45	0.04
110-130 frames/sec	0.7-0.9	−1.8 ± 0.3	13	−0.6 - 0.62	12	0.43	0.05	15	−0.60 - 0.64	10	0.45	0.04
< 130 frames/sec	<0.9	−2.0 ± 0.3	8	−0.5 - 0.6	10	0.57	0.008	9	−0.45 - 0.49	10	0.71	0.0003
RV Logitudinal Early Diastolic Strain Rate			Bias (%)	LOA	(%)	r	p value	Bias(%)	LOA	(%)	r	p value
<90 frames/ sec	<0.5	3.0 ± 0.8	12	−0.8 - 0.8	9	0.88	0.0001	15	−8.8 - 7.5	18	0.66	0.005
90-110 frames/ sec	0.5 - 0.7	3.1 ± 1.1	13	−0.8 - 0.8	9	0.92	<0.0001	12	−7.6 - 5.2	18	0.78	0.0006
110-130 frames/sec	0.7 - 0.9	3.3 ± 1.0	5	−0.4 - 0.5	5	0.97	<0.0001	8	−6.3 - 4.7	9	0.79	<0.0001
> 130 frames/sec	<0.9	3.8 ± 1.1	3	−0.3 - 0.3	3	0.97	<0.0001	6	−4.2 - 3.3	8	0.91	<0.0001
LV Logitudinal Early Diastolic Strain Rate
<90 frames/ sec	<0.5	2.9 0.6	13	−0.8 - 0.9	11	0.72	0.0003	18	−1.2 - 1.2	17	0.48	0.02
90-110 frames/ sec	0.5-0.7	3.1 ± 0.7	16	−1.1 - 1.1	13	0.69	0.0007	17	−1.0 - 1.0	13	0.70	0.0006
110-130 frames/sec	0.7-0.9	3.4 ± 0.6	14	−1.0 - 1.1	12	0.81	<0.0001	13	−0.9 - 0.9	11	0.80	<0.0001
> 130 frames/sec	>0.9	3.6 ± 0.7	16	−1.2 - 1.1	14	0.84	<0.0001	22	−1.3 - 1.3	18	0.53	0.01
RV Logitudinal Late Diastolic Strain Rate			Bias (%)	LOA	(%)	r	p value	Bias (%)	LOA	(%)	r	p value
<90 frames/ sec	<0.5	2.5 ± 0.8	15	−5.7 - 5.1	9	0.84	0.0001	15	−0.75 - 0.79	12	0.92	<0.0001
90-110 frames/ sec	0.5-0.7	2.6 ± 1.0	8	−2.6 - 2.6	7	0.97	<0.0001	11	−0.65 - 0.69	9	0.90	<0.0001
110-130 frames/sec	0.7-0.9	2.5 ± 1.0	4	−0.3 - 0.3	14	0.99	<0.0001	10	−1.42 - 1.46	21	0.75	0.0001
> 130 frames/sec	>0.9	2.3 ± 1.0	7	−0.5 - 0.5	8	0.97	<0.0001	10	−0.99 - 1.0	16	0.99	<0.0001
LV Logitudinal Late Diastolic Strain Rate
<90 frames/ sec	<0.5	2.1 ± 0.4	20	−0.9 - 0.9	14	0.72	0.0002	44	−2.14 - 2.2	38	0.07	0.7
90-110 frames/ sec	0.5-0.7	2.0 ± 0.9	35	−1.2 - 1.3	25	0.72	0.0002	39	−2.15 - 2.19	37	0.23	0.32
110-130 frames/sec	0.7-0.9	1.9 ± 0.9	26	−1.5 - 1.5	28	0.61	0.003	33	−1.46 - 1.50	28	0.60	0.004
> 130 frames/sec	>0.9	2.1 ± 0.9	27	−1.0 - 0.9	18	0.86	<0.0001	27	−1.29 - 1.33	23	0.71	0.0003

¹The mean ± SD of strain rate measurements shown were obtained by a single observer (A.A.S). LOA: Limits of agreement. CV: Coefficient of variation. RV: Right ventricle. LV: Left ventricle.