1. Patent ductus arteriosus ligation is associated with impaired left ventricular systolic performance in premature infants weighing less than 1000 g 
Patrick J. McNamara, MB Bch MRCPCH, Lilian Stewart, MD, Sandesh P. Shivananda, MD, Derek Stephens, MSc, Arvind Sehgal, MD 
The Journal of Thoracic and Cardiovascular Surgery 
Volume 140, Issue 1, Pages (July 2010)
DOI: /j.jtcvs
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2. Figure 1
Trends in mean velocity of circumferential fiber shortening (mVCFc) after patent ductus arteriosus ligation. #P < .05 versus baseline, analysis of variance.
The Journal of Thoracic and Cardiovascular Surgery  , DOI: ( /j.jtcvs )
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3. Figure 2
Trends in left ventricular (LV) exposed vascular resistance after patent ductus arteriosus ligation. #P < .05 versus baseline, analysis of variance.
The Journal of Thoracic and Cardiovascular Surgery  , DOI: ( /j.jtcvs )
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