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A. Example of a patient without left ventricle (LV) dyssynchrony on gated myocardial perfusion single-photon emission computed tomography (SPECT).
Synchronous contraction pattern is reflected by homogeneous phase angle distribution of polar map (left) and narrow highly peaked histogram (right). At
the 6-month follow-up, no improvement in New York Heart Association (NYHA) functional class was observed, and LV ejection fraction remained
unchanged (32% at baseline vs 33% at 6-month follow-up). B. Example of a patient with extensive LV dyssynchrony on gated myocardial perfusion
SPECT. LV dyssynchrony is indicated by heterogeneous phase-angle distribution of polar map (left) and wide histogram (right). At the 6-month follow-up,
NYHA functional class improved from 3 to 2, with increase in LV ejection fraction from 21% to 33%. CRT, cardiac resynchronization therapy. Reproduced
Source: NUCLEAR CARDIOLOGY, Hurst's The Heart, 14e
with permission from Boogers MM, Van Kriekinge SD, Henneman MM, et al: Quantitative gated SPECT-derived phase analysis on gated myocardial
Citation:
Fuster
V,ventricular
Harrington dyssynchrony
RA, Narula J, Eapen
ZJ. Hurst's
The Heart,
14e; 2017
Available at: http://mhmedical.com/
May 07,
perfusion SPECT
detects
left
and predicts
response
to cardiac
resynchronization
therapy, J Nucl Med. Accessed:
2009 May;50(5):7182017
353
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