Abstract
Background
SPECT myocardial perfusion imaging (MPI) provides an assessment of LV mechanical dyssynchrony (LVMD) which correlates with CVD outcomes in diverse populations including those awaiting renal transplant (RT). The current study examines the association of LVMD on pre-transplant MPI with long-term CVD mortality post RT.
Methods
We identified consecutive patients who underwent RT at the University of Alabama at Birmingham between 2008 and 2012 from our prospectively collected database. 675 patients in the database underwent MPI and had images amenable for phase analysis. A blinded investigator retrieved the studies and derived LVMD indices including histogram bandwidth (BW), standard deviation (SD), phase peak, phase skewness, and phase kurtosis. The primary outcome was CVD death after RT.
Results
The study cohort had a median age of 54 years, 56% were men, 43% had diabetes, and 7% had prior myocardial infarction. Patients were on dialysis for a median of 3.4 years prior to RT and 34% received living donor transplants. During a median follow-up time after RT of 4.7 years (IQR 3.5 to 6.3 years) 59 patients (9%) succumbed to CVD death. Patients with wider BW, wider SD, lower skewness, and lower kurtosis had an increased risk of CVD death. On multivariate adjustment, BW and skewness remained as independent predictors of CVD deaths.
Conclusions
LVMD by phase analysis of gated SPECT MPI is associated with increased risk of CVD death after RT. This association is independent of demographics, comorbidities, and traditional findings on MPI and added incremental prognostic information. Assessment of LVMD should be considered for risk stratification in these patients.
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Abbreviations
- BW:
-
Histogram bandwidth
- CVD:
-
Cardiovascular disease
- ESRD:
-
End-stage renal disease
- LVEF:
-
Left ventricular ejection fraction
- LVMD:
-
Left ventricular mechanical dyssynchrony
- MPI:
-
Myocardial perfusion imaging
- RT:
-
Renal transplant
- SD:
-
Standard deviation
- SPECT:
-
Single-photon emission computed tomography
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Morgan, W.S., Ives, C.W., Farag, A.A. et al. Effect of left ventricular mechanical dyssynchrony assessed pre-renal transplantation on cardiovascular death post transplantation. J. Nucl. Cardiol. 29, 2896–2905 (2022). https://doi.org/10.1007/s12350-021-02818-0
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DOI: https://doi.org/10.1007/s12350-021-02818-0