Imperial College London

DrDeclanO'Regan

Faculty of MedicineInstitute of Clinical Sciences

Reader in Imaging Sciences
 
 
 
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Contact

 

+44 (0)20 3313 1510declan.oregan

 
 
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Location

 

Imaging Sciences DepartmentHammersmith HospitalHammersmith Campus

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Summary

 

Publications

Citation

BibTex format

@article{Orini:2019:10.1161/jaha.119.012097,
author = {Orini, M and Graham, AJ and MartinezNaharro, A and Andrews, CM and de, Marvao A and Statton, B and Cook, SA and O'Regan, DP and Hawkins, PN and Rudy, Y and Fontana, M and Lambiase, PD},
doi = {10.1161/jaha.119.012097},
journal = {Journal of the American Heart Association},
title = {Noninvasive mapping of the electrophysiological substrate in cardiac amyloidosis and its relationship to structural abnormalities},
url = {http://dx.doi.org/10.1161/jaha.119.012097},
volume = {8},
year = {2019}
}

RIS format (EndNote, RefMan)

TY  - JOUR
AB - BackgroundThe relationship between structural pathology and electrophysiological substrate in cardiac amyloidosis is unclear. Differences between lightchain (AL) and transthyretin (ATTR) cardiac amyloidosis may have prognostic implications.Methods and ResultsECG imaging and cardiac magnetic resonance studies were conducted in 21 cardiac amyloidosis patients (11 AL and 10 ATTR). Healthy volunteers were included as controls. With respect to ATTR, AL patients had lower amyloid volume (51.0/37.7 versus 73.7/16.4 mL, P=0.04), lower myocardial cell volume (42.6/19.1 versus 58.5/17.2 mL, P=0.021), and higher T1 (1172/64 versus 1109/80 ms, P=0.022) and T2 (53.4/2.9 versus 50.0/3.1 ms, P=0.003). ECG imaging revealed differences between cardiac amyloidosis and control patients in virtually all conductionrepolarization parameters. With respect to ATTR, AL patients had lower epicardial signal amplitude (1.07/0.46 versus 1.83/1.26 mV, P=0.026), greater epicardial signal fractionation (P=0.019), and slightly higher dispersion of repolarization (187.6/65 versus 158.3/40 ms, P=0.062). No significant difference between AL and ATTR patients was found using the standard 12lead ECG. T1 correlated with epicardial signal amplitude (cc=−0.78), and extracellular volume with epicardial signal fractionation (cc=0.48) and repolarization time (cc=0.43). Univariate models based on single features from both cardiac magnetic resonance and ECG imaging classified AL and ATTR patients with an accuracy of 70% to 80%.ConclusionsIn this exploratory study cardiac amyloidosis was associated with ventricular conduction and repolarization abnormalities, which were more pronounced in AL than in ATTR. Combined ECG imaging–cardiac magnetic resonance analysis supports the hypothesis that additional mechanisms beyond infiltration may contribute to myocardial damage in AL amyloidosis. Further studies are needed to assess the clinical impact of this approach.
AU - Orini,M
AU - Graham,AJ
AU - MartinezNaharro,A
AU - Andrews,CM
AU - de,Marvao A
AU - Statton,B
AU - Cook,SA
AU - O'Regan,DP
AU - Hawkins,PN
AU - Rudy,Y
AU - Fontana,M
AU - Lambiase,PD
DO - 10.1161/jaha.119.012097
PY - 2019///
SN - 2047-9980
TI - Noninvasive mapping of the electrophysiological substrate in cardiac amyloidosis and its relationship to structural abnormalities
T2 - Journal of the American Heart Association
UR - http://dx.doi.org/10.1161/jaha.119.012097
UR - http://hdl.handle.net/10044/1/73472
VL - 8
ER -