A new method for relating regional intravascular resistance to pulmonary arterial, capillary, and venous pressure and volume was used to evaluate local differences of reactivity in the pulmonary blood vessels in the isolated lung lobe of the dog. Intravascular infusion of isoproterenol caused active dilatation of pulmonary arteries and veins. Capillary conductance (1/resistance) and volume incr...

Changes in the isometric tension of isolated strips of cutaneous, femoral, mesenteric, pulmonary, and muscle arteries and veins were recorded at 37°C in an organ bath. Acetylcholine (5 X 10~ and 10"' g/ml) caused relaxation of strips from the saphenous veins, the femoral veins, and all of the arteries after contraction by norepinephrine released from nerve terminals by electrical stimulation (2...

We present two cases of individual pulmonary vein atresia without vestige of an involved pulmonary vein. On CT, we noted the absence or interruption of normal pulmonary venous structures, and the presence of abnormal vascular structures that represented collaterals for the involved lung parenchyma. On angiography, the atretic pulmonary vein was found to drain into the other ipsilateral pulmonar...

Haemoptysis has a long list of causes, but pulmonary varices are amongst the rare causes. Pulmonary varices are rare abnormalities of pulmonary veins that may exist either as an isolated malformation or in association with pulmonary venous hypertension. This case report describes pulmonary varices as a cause of hemoptysis in an adolescent boy, which was diagnosed on multislice CT and confirmed ...

Radio-frequency catheter ablation (RFCA) of the distal pulmonary veins and posterior left atrium is increasingly being used to treat recurrent or refractory atrial fibrillation that resists pharmacologic therapy or cardioversion. Successful RFCA of atrial fibrillation requires resolution of abnormal rhythms while minimizing complications and can be achieved with precise, preprocedural, three-di...

Cardiac transplantation carries a known risk of atrial arrhythmias. We present an unusual case and discuss the mechanism of an atrial arrhythmia arising from a donor pulmonary vein in a lung transplant recipient. A 59-year-old white woman with type 2 diabetes mellitus, obstructive sleep apnea, and hypertension underwent bilateral lung transplantation in 2005 because of end stage cystic fibrosis...

In mitral atresia with a closed or narrowly patent foramen ovale, anomalous pulmonary venous connexions may occur that function as collateral pathways for the return of pulmonary venous blood to the heart. In 2 cases (Edwards and DuShane, 1950; Lucas et al., 1962), although all the pulmonary veins' connected normally, an anomalous channel-termed a levo-atriocardinal veinformed the collateral pa...