Delayed Hyper-Enhancement Magnetic Resonance Imaging Provides Incremental Diagnostic and Prognostic Utility in Suspected Cardiac Amyloidosis

Bethany A. Austin, W. H Wilson Tang, E. Rene Rodriguez, Carmela Tan, Scott D. Flamm, David O. Taylor, Randall C. Starling, Milind Y. Desai

Research output: Contribution to journalArticlepeer-review

Abstract

Objectives: We sought to assess the diagnostic accuracy and incremental prognostic value of delayed hyper-enhancement cardiac magnetic resonance (DHE-CMR) compared with electrocardiographic and transthoracic echocardiographic (TTE) parameters in such patients. Background: Utility of DHE-CMR in the diagnosis of patients with suspected cardiac amyloidosis (CA) has recently been demonstrated, but its incremental prognostic utility is unclear. Methods: Forty-seven consecutive patients (mean age 63 years, 70% men, 55% New York Heart Association functional class >II) with suspected CA who underwent electrocardiography (ECG), TTE, DHE-CMR, and biopsy (38 endomyocardial, 9 extracardiac) were studied. Low voltage on ECG was defined as S-wave in lead V1 + R-wave in lead V5 or V6 15, and 47% had advanced (pseudonormal or restrictive) diastology. The diagnostic accuracy of DHE-CMR in patients undergoing endomyocardial biopsy was as follows: sensitivity 88%, specificity 90%, positive predictive value 88%, and negative predictive value 90%. On multivariable logistic regression testing of the diagnostic ability of various noninvasive imaging parameters, only DHE-CMR was significant (Wald chi-square statistic 9.6, p <0.01). At 1-year post-biopsy, there were 9 (19%) deaths. On Cox proportional hazards analysis, only positive DHE-CMR was a predictor of 1-year mortality (Wald chi-square statistic 4.91, p = 0.03). Conclusions: A characteristic DHE-CMR pattern is more accurate for diagnosis and is a stronger predictor of 1-year mortality in patients with suspected CA as compared with other noninvasive parameters.

Original languageEnglish (US)
Pages (from-to)1369-1377
Number of pages9
JournalJACC: Cardiovascular Imaging
Volume2
Issue number12
DOIs
StatePublished - Dec 2009
Externally publishedYes

Keywords

  • amyloidosis
  • biopsy
  • cardiac magnetic resonance
  • echocardiography
  • mortality

ASJC Scopus subject areas

  • Cardiology and Cardiovascular Medicine
  • Radiology Nuclear Medicine and imaging

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