Table 2.

Red flags that indicate cardiac amyloidosis [50]

Reduction in longitudinal strain with apical sparing (cherry on the top)

Discrepancy between left ventricular wall thickness and lack of left ventricular hypertrophy on electrocardiogram

Atrioventricular block with hypertrophic phenotype

Echocardiographic hypertrophic phenotype with associated infiltrative features, including increased thickness of atrioventricular valves, interatrial septum, and right ventricular free wall

Marked extracellular volume expansion and/or diffuse late gadolinium enhancement on cardiac magnetic resonance tomography

Symptoms of polyneuropathy and/or dysautonomia

History of unilateral or bilateral carpal tunnel syndrome

Mild increase in troponin levels on repeated occasions