National patterns in imaging utilization for diagnosis of cardiac amyloidosis: A focus on Tc99m-pyrophosphate scintigraphy.

Background: Tc99m-pyrophosphate (Tc99m-PYP) scintigraphy has emerged as a diagnostic modality for transthyretin (TTR) cardiac amyloidosis (CA). We sought to examine the variability in test utilization across multiple centers in the US.

Methods: An electronic, web-based survey addressing specifics on Tc-99m PYP imaging was emailed to ASNC members, totaling 2785 recipients.