Elsevier

The Journal of Pediatrics

Volume 100, Issue 2, February 1982, Pages 297-299
The Journal of Pediatrics

Brief clinical and laboratory observation
Continuous wave Doppler ultrasonographic quantitation of patent ductus arteriosus flow*

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    The degree of ductal steal can be semiquantitatively assessed by planimetering reversed to forward flow (R/F) to assign a ratio. A strong linear correlation between the ratio of pulmonary to systemic blood flow (Qp/Qs) and R/F (assigned by Doppler) has been demonstrated (R2 = 0.82, P < 0.01).85 The ratio of the PI of the LPA to the PI of the DAo (Rp/Rs index) has been proposed as a semiquantitative, extracardiac index that measures the downstream blood velocity in the pulmonary artery and DAo just distal to the PDA.

  • Patent ductus arteriosus ligation in neonates: preoperative predictors of poor postoperative outcomes

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    A study by Algarsamy and colleagues [17] showed that clinical signs such as murmur, hyperdynamic chest, and presence of a dorsalis pedis pulse did not correlate with an echocardiographic diagnosis of PDA during the first few days of life, and therefore, echocardiogram was required for early diagnosis. Based on most reports, the most reliable echocardiographic indicators of a hemodynamically significant PDA are left atrial/aortic (LA/Ao) ratio more than 1.4 mm/kg [3,18-20] and observation of reverse aortic diastolic flow [3,21-23]. Other criteria include a pulsatile flow pattern [16], wide ductal color Doppler flow jet at the narrowest point [24,25], increased left ventricular diameter in diastole [26], and mean and end-diastolic flow volume of the left pulmonary artery [18].

  • Risk Factors for Persistent Ductus Arteriosus Patency during Indomethacin Treatment

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    The need for treatment was not dependent on the need for respiratory support or the degree of left-to-right shunt. The degree of left-to-right shunt was considered to be small or moderate on the basis of the absence or presence of holodiastolic retrograde flow in the descending aorta (at the level of the diaphragm).25 Even infants who required only nasal cannula oxygen received treatment when the ductus was patent on echo-Doppler ultrasound scanning examination.

  • Patent Ductus Arteriosus in the Premature Infant

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*

Supported in part by National Institutes of Health grants HL 11307, HL 00718, and HL 20677.

**

The recipient of RCDA 00500 from the NHLBI.

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