2006年10月24日 · The patent ductus arteriosus (PDA) is a vascular structure that connects the proximal descending aorta to the roof of the main pulmonary artery near the origin of the left branch pulmonary artery. This essential fetal structure normally closes spontaneously after birth. After the first few weeks of life, persistence of ductal patency is abnormal.

Proposed Classification of PDAs: PDA morphology of premature children that did not fit the Krichenko et al. classification were grouped as Type F. To the left of the descriptive text is a figure...

2025年3月9日 · Patent ductus arteriosus or arteriosum (PDA) is a congenital cardiac anomaly where there is persistent patency of the ductus arteriosus, a normal connection of the fetal circulation between the aorta and the pulmonary arterial system that develops from the 6 …

Patent ductus arteriosus is classified by the anatomical view of the duct by Krichenko criteria. Krichenko et al. first introduced a method for classifying PDA in 1989. [1] Type A: Conical duct with well defined aortic ampulla and narrowest portion near the pulmonary artery end.

The PDA connects the upper descending aorta to the bifurcation of the main pulmonary artery (pulmonary trunk) close to the origin of the left pulmonary artery. Ductal anatomy varies in terms of its size (length and diameter), its shape, and its topography in relation to adjacent structures.

2006年11月1日 · To characterize angiographic morphology and minimum internal transverse diameter of left-to-right shunting patent ductus arteriosus (PDA) in a large series of dogs. PDA is the most common congenital cardiac malformation in the dog. Transarterial ductal occlusion is increasingly performed to close this defect.

This diagram depicts the variations in PDA configuration based on the Krichenko angiographic classification: type A: conical ductus with prominent aortic ampulla and constriction near the pulmonary artery end; type B: window-like (wide and very short) ductus; type C: tubular ductus without constrictions; type D: complex ductus with multiple ...

2018年2月20日 · In this study, TEE‐3D provided unique information regarding overall shape and measurements (“A” and “B”) by displaying the pulmonary ostium of the PDA en face. We evaluated the shape of the ampulla and pulmonary ostium to demonstrate that there are a variety of shape combinations with the majority (71%) of dogs in this study ...

2012年2月13日 · In 1989 Krichenco et al. classified PDA according to its angiographic appearance into five types: type A “conical” ductus, with well-defined aortic ampulla and constriction near the pulmonary artery end. Type B, very large “window” ductus, with very short length. Type C, “tubular” ductus, which is without constrictions.

These included three simplified models (IIA, IIB, and wide ampulla (WA) taper), and a physiologically representative model of canine PDA. The dimensions and shapes of the simplified models are...