Subtype‐Specific Interactions and Prognosis in Cardiac Amyloidosis

Autor: Brett W. Sperry, Michael N. Vranian, Rory Hachamovitch, Hariom Joshi, Asad Ikram, Dermot Phelan, Mazen Hanna
Jazyk: angličtina
Rok vydání: 2016
Předmět:
Zdroj: Journal of the American Heart Association: Cardiovascular and Cerebrovascular Disease, Vol 5, Iss 3 (2016)
Druh dokumentu: article
ISSN: 2047-9980
DOI: 10.1161/JAHA.115.002877
Popis: BackgroundLight chain (AL) and transthyretin (ATTR) amyloidosis have a similar effect on myocardial function but very different disease trajectories and survival. However, limited data are available evaluating subtype‐specific predictors of outcomes in a large contemporary cohort. Methods and ResultsWe retrospectively investigated 360 patients at the time of initial diagnosis of cardiac amyloidosis (191 AL and 169 ATTR) from 2002 to 2014. Clinical, laboratory, electrical, and morphologic covariates were evaluated based upon amyloid subtype. ATTR etiology was associated with older age, more chronic medical conditions, and the use of standard heart failure medical therapy. Left ventricular mass index and electrocardiographic voltage were higher in ATTR, while there was no difference in ejection fraction or markers of diastology between subtypes. A multivariable Cox model was generated using previously identified predictors of negative outcomes in cardiac amyloidosis and analyzed after stratification for subsequent amyloid‐specific treatment. An AL etiology was the most predictive variable (hazard ratio 3.143, P
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