2629930 EECG exercise electrocardiography 9 2629939 EECG esophageal electrocardiography 3 2629937 EECG epicardial electrocardiogram 2 2629940 EECG epicardial electrogram 2 2629934 EECG exercise ECG 2 2629938 EECG ectal electrocardiogram 1 2629936 EECG ethanolic extract from Campomanesia guazumifolia 1 2629935 EECG ethanolic extract of Calotropis gigantea flowers 1 2629941 EECG Exhausting exercises control group 1