Table 3.

Longitudinal changes in myocardial work indices during breast RT

	Pre-RT (n = 19)	Post-RT (n = 19)	6-month F/U (n = 18)	P value*
Global work index, mm Hg%	1834 ± 238	1847 ± 238	1885 ± 271	.356
Global constructive work, mm Hg%	1992 ± 260	2026 ± 243	2073 ± 226	.093
Global wasted work, mm Hg%	76 ± 39	71 ± 50	71 ± 28	.287
Global work efficiency, %	96 ± 2	96 ± 2	96 ± 1	.280

Abbreviations: RT = radiation therapy.

^⁎Wilcoxon signed-rank test between pre-RT and 6-month F/U (N = 17).

Values are mean ± SD.