Brief clinical and laboratory observationContinuous wave Doppler ultrasonographic quantitation of patent ductus arteriosus flow*
References (6)
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Noninvasive detection of retrograde descending aortic flow in infants using continuous wave Doppler ultrasonography
J Pediatr
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Hemodynamic basis for clinical manifestations of patent ductus arteriosus
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Pulsatile aortopulmonary pressure-flow dynamics of patent ductus arteriosus in patients with various hemodynamic states
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Cited by (52)
Cerebral White Matter Injury: Pathogenesis
2018, Volpe's Neurology of the NewbornEncephalopathy of Prematurity
2018, Volpe's Neurology of the NewbornThe Ductus Arteriosus: A Refined Approach!
2012, Seminars in PerinatologyCitation Excerpt :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
2008, Journal of Pediatric SurgeryCitation Excerpt :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
2007, Journal of PediatricsCitation Excerpt :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
2005, Avery's Diseases of the Newborn
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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.