Because of the previously mentioned abnormalities, the lack of an anatomic diagnosis, and the suspicion that myocarditis might be present, an endomyocardial biopsy was performed. Pathologic examination of the right ventricular tissue revealed the typical amorphous material characteristic of amyloid (Fig 2). Investigation of a bone marrow biopsy showed no evidence of amyloid or myeloma, […]

Diagnosis Made by Endomyocardial Biopsy In patients with serious ventricular arrhythmias and no obvious heart disease, it has been shown that an endomyocardial biopsy may be helpful in identifying underlying cardiac pathologic abnormalities. It has also been well established that cardiac amyloidosis may be a cause of ventricular arrhythmias and sudden cardiac death; however, the […]