Table 3.

Comparison of key echocardiographic parameters between 15 Gy whole thorax irradiation [WTI, (Medhora et al. 2015)] and 13 Gy leg-out partial body irradiation (PBI). Data are expressed as mean ± standard deviation (SD).

Echocardiogram Parameters	15 Gy WTI (42 days) n=6, Mean ± SD	13 Gy PBI (50 days) n=12, Mean ± SD	Implication differences in the two models
RV width (cm)	0.44±0.06	0.25±0.06*	Higher PAH in 15 Gy
RV free wall (cm)	0.14±0.05	0.10±0.05
CO (ml/min)	54.7±30.8	116.9±78.2	Worse heart function in 15 Gy
PAT (ms)	13.0±2.14	18.8±6.16*	Higher PAH in 15 Gy
PAT/ET	0.19±0.04	0.28±0.10*	Higher PAH in 15 Gy
IVRT (ms)	39.6±7.65	19.6±7.75*	Worse heart function in 15 Gy
e′ (m/s)	0.03±0.01	0.05±0.02*	Higher PAH in 15 Gy

RV-right ventricular, CO-cardiac output, PAT-pulmonary acceleration time, PAT/ET-pulmonary acceleration time/ejection time, IVRT-isovolumic relaxation time, e′-early diastolic mitral annulus velocity, PAH-pulmonary artery hypertension.

^*p<0.05 versus 15 Gy WTI.