A case of idiopathic dilatation of the pulmonary artery with mild subvalvular pulmonary stenosis revealed by cardiovascular magnetic resonance

Tomiharu Niida; Takayuki Kitai; Kikuo Isoda; Takeshi Adachi; Fumitaka Ohsuzu

doi:10.1016/j.jccase.2010.09.001

A case of idiopathic dilatation of the pulmonary artery with mild subvalvular pulmonary stenosis revealed by cardiovascular magnetic resonance

J Cardiol Cases. 2010 Oct 8;3(1):e53-e56. doi: 10.1016/j.jccase.2010.09.001. eCollection 2011 Feb.

Authors

Tomiharu Niida¹, Takayuki Kitai², Kikuo Isoda¹, Takeshi Adachi¹, Fumitaka Ohsuzu¹

Affiliations

¹ Department of Internal Medicine 1, National Defense Medical College, 3-2 Namiki, Tokorozawa, Saitama 359-8513, Japan.
² Department of Internal Medicine, JSDF Sapporo Hospital, Sapporo, Hokkaido, Japan.

Abstract

We present herein a rare case of idiopathic pulmonary artery dilatation with mild subvalvular pulmonary stenosis. The chest radiograph showed the protrusion of the left second arch of the cardiac silhouette. Cardiovascular magnetic resonance revealed an aneurysmal pulmonary trunk (maximal diameter, 4.5 cm) and mild subvalvular pulmonary stenosis. The pressure gradient across the pulmonary valve was mild (peak-to-peak, 11 mmHg), and the right ventricular pressure was normal. We diagnosed this case with idiopathic dilatation of the pulmonary artery by excluding other causes of pulmonary arterial enlargement.

Keywords: Cardiovascular magnetic resonance; Idiopathic dilatation of the pulmonary artery; Pulmonary artery stenosis.