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Adenosine stress myocardial perfusion imaging in octogenarians: Safety, tolerability, and long-term prognostic implications of hemodynamic response and SPECT-related variables

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Journal of Nuclear Cardiology Aims and scope

Abstract

Background

Evaluation of tolerability, safety, and prognostic implications of adenosine stress myocardial perfusion imaging (MPI) in octogenarians.

Methods

370 octogenarians (49% known coronary artery disease) were studied. Hemodynamic response, MPI-related data, and rest-left ventricular ejection fraction (LVEF) based on echocardiography were registered per patient, and prospective follow-up was performed to document all-cause death (ACD), cardiac death (CD), myocardial infarction (MI), and late revascularization.

Results

No deaths or MIs were observed during adenosine infusion or the short-term post-infusion period. 86% of patients were able to tolerate a 6-minute infusion. All side effects terminated spontaneously after infusion cessation, except for one case of pulmonary oedema. After 9.3 years, there were 124 ACDs, 62 CDs, 16 MIs, and 35 revascularizations. Differences between survival curves of summed stress score (SSS)-based risk groups were significant for all end points (P < .001). SSS and LVEF were independent predictors of all end points (P ≤ .01) and lung uptake of cardiac end points. ΔHR <10 bpm (OR = 1.78, P = .004) and inability to increase HR by >10 bpm and decrease systolic blood pressure by >10 mmHg (OR = 2, P = .02) during adenosine infusion were independent predictors of ACD and CD, respectively. Hemodynamic response variables, SSS, and lung uptake provided incremental prognostic value over pre-test data for ACD and CD.

Conclusions

In octogenarians, adenosine stress MPI is well tolerated and provides effective long-term risk stratification.

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Abbreviations

MPI:

Myocardial perfusion imaging

SBP:

Systolic blood pressure

HR:

Heart rate

SSS:

Summed stress score

SRS:

Summed rest score

SDS:

Summed difference score

TID:

Transient ischemic left ventricular dilation

LHR:

Lung to heart ratio

ACD:

All-cause death

CD:

Cardiac death

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Correspondence to Athanasios Katsikis MD, PhD.

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Katsikis, A., Theodorakos, A., Papaioannou, S. et al. Adenosine stress myocardial perfusion imaging in octogenarians: Safety, tolerability, and long-term prognostic implications of hemodynamic response and SPECT-related variables. J. Nucl. Cardiol. 26, 250–262 (2019). https://doi.org/10.1007/s12350-017-0893-0

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  • DOI: https://doi.org/10.1007/s12350-017-0893-0

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