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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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