<prompt> Most common cause of death in primary amyloidosis isRespiratory failureRenal failureCardiac failureSepticemia  <response>: Primary amyloidosis: light chain amyloidosis or AL-amyloid diseasePrimarily a consequence of plasma cell disordersThe kidney is the most frequently involved organ80Hea is second most frequently involved40Cardiac failure is the most common cause of deathCardiac amyloidosis mostly manifests as restrictive cardiomyopathyref: Harrisons 18e p948 