{Reference Type}: Case Reports {Title}: Cardiac Amyloidosis: The Importance of Surveillance in a Patient With an Initial Negative Cardiac Biopsy. {Author}: Ananthakrishna R;Lloyd R;Kuss BJ;Selvanayagam JB; {Journal}: JACC Case Rep {Volume}: 2 {Issue}: 2 {Year}: Feb 2020 暂无{DOI}: 10.1016/j.jaccas.2019.11.041 {Abstract}: Cardiac amyloidosis is a progressive disorder and is sometimes difficult to diagnose even when suspected in the appropriate clinical setting. We present an interesting case of rapidly progressive light-chain cardiac amyloidosis and highlights the importance of close monitoring even when the initial biopsy and imaging findings are not pathognomonic for amyloidosis. (Level of Difficulty: Beginner.).