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.

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.

There are five types of patent ductus arteriosus determined by angiographic appearance (Krichenko classification): Type A (conical): prominent aortic ampulla with a constricted pulmonary end. Type B (window): large width with a very short length. Type C (tubular): long and without any evidence of constriction.

2023年8月8日 · The ductus arteriosus is a fetal vessel that allows the oxygenated blood from the placenta to bypass the fetal lungs in utero. At birth, a newborn inhales for the first time, and the lungs fill with air, causing pulmonary vascular resistance to drop and blood to flow from the right ventricle to the lungs, where it can undergo oxygenation.

2015年4月2日 · The morphological PDA classification was Type A in 66 (37.1%), Type C in 27 (15.3%), Type D in 17 (9.6%), and Type E in 67 (37.9%). The median minimum PDA diameter was 2.6 mm (1.2–7.7 mm). The implanted device sizes were: 4 mm in 17 patients (9.6%), 6 mm in 81 (45.8%), 8 mm in 56 (31.6%), 10 mm in 18 (10.2%), and 12 mm in 5 (2.8%).

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 …

2016年7月27日 · After birth, in the absence of severe cyanotic heart disease or persistently elevated pulmonary vascular resistance, a patent ductus arteriosus (PDA) may be pathologic, presenting a detrimental pressure load to the pulmonary circulation, a volume load to the left heart, or an increased risk of endocarditis over time.

2012年1月1日 · O dispositivo AVP II é uma alternativa segura e eficaz para o tratamento de PCA, principalmente naqueles que apresentam limitações ao fechamento convencional. Patent ductus arteriosus (PDA) is one of the most common congenital cardiac lesions and accounts for up to 7% of all congenital heart diseases. 1., 2.

2016年7月10日 · Type D or Complex: multiple constrictions. Type E or Elongated: long with remote constriction from the anterior edge of the trachea. Hypothesized to be partial replacement of the smooth muscle cells in the media of the ductus by collagen and elastic fibers [2].

2002年10月1日 · Background: Anatomic type and angiographic measurements of patent ductus arteriosus (PDA) are used to determine the suitability of transcatheter closure (TCC). The purpose of this study is to evaluate whether these PDA features can be obtained by 2-dimensional echocardiography (2DE).