Umbilical cord vitamin D, ionized calcium and myocardial oxygen demand

Reeves, Inez; Liang, Willie; Asadi, Mohammad Sadegh; Millis, Richard M.

doi:10.3109/14767058.2013.852173

Cited by 1 publication

(2 citation statements)

References 17 publications

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“…Our study could possibly suggest a "steal effect," showing significantly lower coronary flows adjusted for weight [10,12,19,20] in the LM coronary artery between the study and comparison groups. The increase in CO in infants with hsPDA did not reach significance, as reported by others [19,21].…”

Section: Discussionmentioning

confidence: 67%

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The effect of patent ductus arteriosus on coronary artery blood flow in premature infants: a prospective observational pilot study

et al. 2020

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Objective To compare coronary flows between premature infants with and without hemodynamically significant patent ductus arteriosus (hsPDA) and to determine if coronary flow is influenced by medical PDA treatment.Design Prospective, observational pilot study. Forty-three infants <32 weeks gestation underwent echocardiography when routinely indicated. Study group included infants with hsPDA requiring treatment. Comparison groups included infants with nonsignificant PDA and infants without PDA. Results The study group (n = 13), compared with the comparison groups with nonsignificant PDA (n = 12) and without PDA (n = 18) had higher troponin levels (p = 0.003 and 0.004, respectively). In infants with hsPDA compared with infants with no PDA there was a significant increase in myocardial oxygen demand and decrease in left main coronary artery flow, with nonsignificant increase in cardiac output. Conclusions Decrease in coronary artery flows and higher troponin values may suggest a "steal effect," not allowing to meet the elevated myocardial oxygen demand in infants with hsPDA.

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Section: Discussionmentioning

confidence: 67%

“…Cardiac output was calculated by multiplying the CO I by π × left ventricle outlet radius 2 . Myocardial oxygen demand was calculated as heart rate times the systolic blood pressure, and was also adjusted for weight [20]. Measurements of peak Vd and TVId were performed with the internal analysis package of the ultrasound unit.…”

Section: Measurementsmentioning

confidence: 99%