Unmasking an idiopathic reno-caval fistula: A rare etiology of right-sided high-output heart failure.

ABSTRACT: An aortocaval fistula is a rare vascular connection between the aorta and inferior vena cava, often caused by abdominal aortic aneurysm, trauma, or infection. It can result in high-output heart failure due to increased venous return and reduced systemic vascular resistance, typically presenting with right-sided symptoms. Renal arteriovenous and reno-caval fistulas are even rarer, with no prior reports of spontaneous idiopathic reno-caval fistulas. A 67-year-old man with hypertension and paroxysmal atrial fibrillation presented with 10 months of generalized edema and exertional dyspnea. He had no history of abdominal trauma or surgery. Examination revealed signs of congestive heart failure and a central abdominal bruit. Echocardiography showed chamber dilation and pulmonary hypertension. Co

SUBMITTER: Sakulpaptong W 

PROVIDER: S-EPMC12514494 | biostudies-literature | 2025 Dec

REPOSITORIES: biostudies-literature