Left ventricular strain during exercise stress: a CMR myocardial feature tracking study

Table 1 Left ventricular volumes, function and strain in comparison between rest and exercise with 50 and 100 W, respectively. Values are given as mean ± standard deviation

	Rest	50 W	100W	50 W vs rest	100 W vs rest	100W vs 50W
				p-values
HF [beats/min]	59.6 ± 12.4	93.8 ± 14.8	116.8 ± 12.3	<0.001	< 0.001	< 0.001
EDVI [ml/m ² ]	86.3 ± 12.2	90.7 ± 8.2	80.7 ± 13.0	0.177	0.201	0.004
ESVI [ml/m ² ]	29.1 ± 5.3	23.9 ± 6.0	21.7 ± 6.8	<0.001	<0.001	<0.07
SVI [ml/m ² ]	57.5 ± 10.7	66.8 ± 5.0	59.8 ± 13.1	0.01	0.568	0.07
EF [%]	66.4 ± 5.6	73.9 ± 4.6	72.9 ± 9.0	<0.001	0.025	0.501
Ecc [%]	-20.4 ± 2.7	-26.4 ± 2.8	-27.7 ± 2.7	<0.001	<0.001	0.146
Ell [%]	-18.9 ± 2.9	-26.5 ± 4.5	-27.9 ± 4.4	< 0.001	< 0.001	0.311
Err [%]	26.8 ± 4.9	30.3 ± 5.2	33.5 ± 9.4	0.031	0.034	0.12

EDVI, enddiastolic volume index; ESVI, endsystolic volume index; SVI, stroke volume index; EF, ejection fraction; HR, heart rate; Ecc, global circumferential strain; Err, global radial strain; Ell, global longitudinal strain. Bold p values indicate a significance level < 0.05 as determined by Students's paired t-test.

ISSN: 1532-429X