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Tottleben J, Torres A, Doukky R. Impact of change of ischemic burden on the outcomes of ESRD patients awaiting kidney transplantation. J Nucl Cardiol 2023; 30:1897-1903. [PMID: 37170063 DOI: 10.1007/s12350-023-03287-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2022] [Accepted: 04/07/2023] [Indexed: 05/13/2023]
Abstract
BACKGROUND In asymptomatic patients with end-stage renal disease (ESRD) wait-listed for kidney transplantation (KT), it is unclear whether a change in ischemic burden on serial surveillance SPECT myocardial perfusion imaging (MPI) impacts outcome. METHODS AND RESULTS In a retrospective cohort of 700 asymptomatic KT candidates with ≥ 2 sequential SPECT-MPI studies, we defined a significant change in ischemic burden between MPIs as ΔSDS of ≥ 2 points. Patients were followed for mean 19 ± 12 months after MPI2 for cardiac death or myocardial infarction. Between MPIs, 29 (4%) subjects received coronary revascularization which was associated with a greater incidence of reduction in ischemic burden on MPI2 (31% vs. 17%, P = 0.049). Among 514 patients with no ischemia on MPI1 (SDS ≤ 1), 15% had new ischemia on MPI2 which was associated with increased MACE (adjusted HR 1.75; CI 1.02-3.01; P = 0.041). Among 186 patients with ischemia on MPI1 (SDS ≥ 2), 66% had improvement of ischemic burden on MPI2 which was associated with significantly lower MACE (adjusted HR 0.46; CI 0.25-0.82; P = 0.009). There was no significant interaction between coronary revascularization and improvement in ischemic burden impacting outcome (interaction P = 0.845). CONCLUSION Among KT candidates who underwent serial MPI for CAD surveillance, new ischemia was associated with increased MACE risk. Improvement in ischemic burden was associated with lower MACE risk irrespective of coronary revascularization status.
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Affiliation(s)
- Jonathan Tottleben
- Division of Cardiology, Cook County Health, 1901 W. Harrison Street, Chicago, IL, 60612, USA
| | - Andrea Torres
- Division of Cardiology, Cook County Health, 1901 W. Harrison Street, Chicago, IL, 60612, USA
| | - Rami Doukky
- Division of Cardiology, Cook County Health, 1901 W. Harrison Street, Chicago, IL, 60612, USA.
- Division of Cardiology, Rush University Medical Center, Chicago, IL, USA.
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Myocardial ischemia in patients with large prior infarction: Clinical decision making and review of literature. Radiol Case Rep 2023; 18:538-544. [DOI: 10.1016/j.radcr.2022.11.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2022] [Revised: 10/30/2022] [Accepted: 11/01/2022] [Indexed: 11/27/2022] Open
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Smith P, Farag A, Bhambhvani P, Iskandrian A, Hage FG. Prognostic value of absent left ventricular ejection fraction reserve with regadenoson SPECT MPI. J Nucl Cardiol 2022; 29:978-986. [PMID: 33089878 DOI: 10.1007/s12350-020-02390-z] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2020] [Accepted: 09/07/2020] [Indexed: 01/18/2023]
Abstract
BACKGROUND An absent left ventricular ejection fraction (LVEF) reserve with vasodilator stress with PET cardiac imaging has been shown to provide significant independent and incremental value to the perfusion images for prediction of future cardiovascular adverse events. However, the prognostic value of LVEF reserve has not been well characterized with SPECT myocardial perfusion imaging (MPI). METHODS We studied 858 consecutive patients with normal and abnormal perfusion pattern with regadenoson SPECT MPI. Change in LVEF was calculated as post-stress LVEF-rest LVEF. Absent LVEF reserve was defined as a drop in LVEF by 5% or more on the post-stress images. The primary outcome was a composite of cardiac death, non-fatal myocardial infarction and late coronary revascularization. RESULTS An absent LVEF reserve was more common in patients with abnormal vs normal MPI (31% vs 19%, P = .001). During a median follow-up of 32 months, the primary outcome was experienced by 31% of the study population. An absent LVEF reserve was not associated with an increased risk of the primary outcome in patients with normal (hazard ratio 1.1, 95% CI .4-2.7, P = .8) or abnormal (.75, .56-1.00, P = .05) MPI. There was no significant correlation between extent of ischemia and post-stress change in LVEF (Pearson r = - .072, P = .07). CONCLUSIONS In patients undergoing regadenoson SPECT MPI, absent LVEF reserve is not associated with worse cardiac outcomes. Thus, routine reporting of both post-stress and rest LVEF measurements in this setting may not be necessary.
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Affiliation(s)
- Phillip Smith
- Division of Cardiovascular Disease, Dept. of Medicine, University of Alabama in Birmingham, Birmingham, United States
| | - Ayman Farag
- Division of Cardiovascular Disease, Dept. of Medicine, University of Alabama in Birmingham, Birmingham, United States
| | - Pradeep Bhambhvani
- Dept. of Radiology, University of Alabama in Birmingham, Birmingham, United States
| | - Ami Iskandrian
- Division of Cardiovascular Disease, Dept. of Medicine, University of Alabama in Birmingham, Birmingham, United States
| | - Fadi G Hage
- Division of Cardiovascular Disease, Dept. of Medicine, University of Alabama in Birmingham, Birmingham, United States.
- Division of Cardiovascular disease, Birmingham VA Medical Center, Birmingham, United States.
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Khan MS, Arif AW, Doukky R. The prognostic implications of ST-segment and T-wave abnormalities in patients undergoing regadenoson stress SPECT myocardial perfusion imaging. J Nucl Cardiol 2022; 29:810-821. [PMID: 33034037 DOI: 10.1007/s12350-020-02382-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2020] [Accepted: 09/11/2020] [Indexed: 01/15/2023]
Abstract
BACKGROUND The prognostic implications of ST-segment and T-wave (ST/T) abnormalities in patients undergoing stress SPECT-myocardial perfusion imaging (MPI) are not well defined. METHODS AND RESULTS This was a single-center, retrospective cohort study of consecutive patients who underwent regadenoson stress SPECT-MPI. Patients with baseline electrocardiogram (ECG) abnormalities that impede ST/T analysis or those with known coronary artery disease were excluded. Patients were categorized as having primary ST abnormalities, secondary ST/T abnormalities due to ventricular hypertrophy or right bundle branch block, T-wave abnormalities, or normal ECG. The primary outcome was major adverse cardiovascular events (MACE) defined as the composite of cardiac death or myocardial infarction. Among 6,059 subjects, 1912 (32%) had baseline ST/T abnormalities. During a mean follow-up of 2.3 ± 1.9 years, the incidence of MACE was significantly higher among patients with secondary ST/T abnormalities compared to those with normal ECG (HR 2.05; 95% confidence interval [CI], 1.04-4.05; P = 0.039). No significant difference in MACE was observed among patients with primary ST abnormalities (HR 1.64; CI 0.87-3.06; P = 0.124) or T-wave abnormalities (HR 1.15; CI 0.62-2.16; P = 0.658) compared with patients who had normal ECG. Among patients with secondary ST/T changes, abnormal MPI was not associated with a significant increase in MACE rates compared to normal MPI (HR 1.18; CI 0.31-4.58; P = 0.808). However, abnormal MPI was associated with higher MACE rates among patients with primary ST abnormalities (HR 4.50; CI 1.44-14.10; P = 0.005) and T-wave abnormalities (HR 3.74; CI 1.20-11.68; P = 0.015). Similarly, myocardial ischemia on regadenoson stress SPECT-MPI was not associated with a significant increase in MACE rates in patients with secondary ST/T abnormalities (HR 1.45; CI 0.38-5.61; P = 0.588), while it was associated with a higher incidence of MACE in patients with primary ST abnormalities (HR 3.012; CI 0.95-9.53; P = 0.049) and T-wave abnormalities (HR 5.06; CI 1.60-15.96; P = 0.002). CONCLUSION While patients with secondary ST/T abnormalities had significantly higher MACE risk, abnormal MPI or presence of myocardial ischemia on regadenoson SPECT-MPI in this group does not add prognostic information. Patients with primary ST abnormalities and T-wave abnormalities do not seem to have a significantly higher MACE risk compared to those with normal ECG; however, abnormal MPI or presence of myocardial ischemia, in these groups, correlates with higher MACE rates.
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Affiliation(s)
| | | | - Rami Doukky
- Department of Medicine, Cook County Health, Chicago, IL, USA.
- Division of Cardiology, Cook County Health, 1901 W. Harrison St., Chicago, IL, 60612, USA.
- Division of Cardiology, Rush University Medical Center, Chicago, IL, USA.
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Kassab K, Hussain K, Torres A, Iskander F, Iskander M, Khan R, Doukky R. The diagnostic and prognostic value of near-normal perfusion or borderline ischemia on stress myocardial perfusion imaging. J Nucl Cardiol 2022; 29:826-835. [PMID: 33034835 DOI: 10.1007/s12350-020-02375-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2020] [Accepted: 08/31/2020] [Indexed: 10/23/2022]
Abstract
BACKGROUND Data on the diagnostic and prognostic value of subtle abnormalities on myocardial perfusion imaging (MPI) are limited. METHODS AND RESULTS In a retrospective single-center cohort of patients who underwent regadenoson SPECT-MPI, near-normal MPI was defined as normal left ventricular ejection fraction (LVEF ≥ 50%) and a summed stress score (SSS) of 1-3 vs SSS = 0 in normal MPI. Borderline ischemia was defined as normal LVEF, SSS = 1-3, and a summed difference score (SDS) of 1 vs SDS = 0 in the absence of ischemia. Coronary angiography data within 6 months from MPI were tabulated. Patients were followed for cardiac death (CD), myocardial infarction (MI), coronary revascularization (CR), and Late CR (LCR) [> 90 days post MPI]. Among 6,802 patients (mean age, 62 ± 13 years; 42% men), followed for a mean of 2.5 ± 2.1 years, 4,398 had normal MPI, 2,404 had near-normal MPI, and 972 had borderline ischemia. Among patients who underwent angiography within 6 months, obstructive (≥ 70% or left main ≥ 50%) CAD was observed at higher rates among subjects with near-normal MPI (33.5% vs 25.5%; P = .049) and those with borderline ischemia (40.5% vs 25.8%; P = .004). During follow-up, 158 (2.3%) CD/MI, 246 (3.6%) CR, and 150 (2.2%) LCR were observed. Near-normal MPI (SSS = 1-3), compared to normal MPI (SSS = 0), was not associated with a significant difference in the risk of the composite endpoint of CD/MI (Hazard ratio [HR], 1.21; 95% confidence interval [CI], .88-1.66; P = .243) or LCR (HR 1.28; CI .93-1.78; P = .130), but was associated with a significant increase in the risk of CR (HR 1.91; CI 1.49-2.46; P < .001). Borderline ischemia (SDS = 1), compared to no ischemia (SDS = 0), was not associated with a significant difference in the risk of CD/MI [HR 1.09; CI .70-1.69; P = .693], but was associated with a significant increase in the risk of CR (HR 5.62; CI 3.08-10.25; P < .001) and LCR (HR 2.98; CI 1.36-6.53; P = .006). CONCLUSION Near-normal MPI and borderline ischemia on SPECT-MPI provide no significant prognostic information in predicting hard cardiac events but are associated with higher rates of obstructive angiographic CAD and coronary revascularizations.
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Affiliation(s)
- Kameel Kassab
- Division of Cardiology, Cook County Health, 1901 W. Harrison St., Chicago, IL, 60612, USA
| | - Kifah Hussain
- Division of Cardiology, Cook County Health, 1901 W. Harrison St., Chicago, IL, 60612, USA
| | - Andrea Torres
- Division of Cardiology, Cook County Health, 1901 W. Harrison St., Chicago, IL, 60612, USA
| | - Fady Iskander
- Division of Cardiology, Cook County Health, 1901 W. Harrison St., Chicago, IL, 60612, USA
| | - Mina Iskander
- Division of Cardiology, Cook County Health, 1901 W. Harrison St., Chicago, IL, 60612, USA
| | - Rozi Khan
- Division of Cardiology, Rush University Medical Center, Chicago, IL, USA
- Department of Medicine, Medstar Union Memorial Hospital, Baltimore, MD, USA
| | - Rami Doukky
- Division of Cardiology, Cook County Health, 1901 W. Harrison St., Chicago, IL, 60612, USA.
- Division of Cardiology, Rush University Medical Center, Chicago, IL, USA.
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Bullock-Palmer RP, Peix A, Aggarwal NR. Nuclear Cardiology in Women and Underrepresented Minority Populations. Curr Cardiol Rep 2022; 24:553-566. [PMID: 35262873 DOI: 10.1007/s11886-022-01673-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 01/12/2022] [Indexed: 11/24/2022]
Abstract
PURPOSE OF REVIEW To outline sex-specific features of coronary artery disease (CAD) that should be considered in the assessment of women, including those from ethnic minority populations with suspected stable ischemic heart disease (IHD). Second, to determine the latest nuclear imaging tools available to assess microvascular CAD. RECENT FINDINGS Latest studies indicate that women are more likely to have ischemia with no obstructive coronary arteries (INOCA) and paradoxically have worse outcomes. Therefore, the evaluation of women with suspected IHD should include assessing microvascular and epicardial coronary circulation. The prevalence of CAD is increasing in younger women due to the increased cardiovascular disease (CVD) risk burden. CAD is often underrecognized in these patients. There is increasing recognition that INOCA is not benign and should be accurately diagnosed and managed. Nuclear imaging assesses the full spectrum of CAD from microvascular CAD to multivessel obstructive epicardial CAD. Further research on myocardial blood flow (MBF) assessment with PET MPI is needed.
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Affiliation(s)
- Renee P Bullock-Palmer
- Department of Cardiology, Deborah Heart and Lung Center, Trenton Road, Browns Mills, NJ, 08015, USA.
| | - Amalia Peix
- Institute of Cardiology and Cardiovascular Surgery, La Habana, Havana, Cuba
| | - Niti R Aggarwal
- Department of Cardiovascular Disease, Mayo Clinic, Rochester, MN, 55902, USA
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Kolkailah AA, Iskander M, Iskander F, Patel PP, Khan R, Doukky R. The prognostic utility of regadenoson SPECT myocardial perfusion imaging in patients with end-stage renal disease: The largest cohort to date. J Nucl Cardiol 2022; 29:101-110. [PMID: 32632913 DOI: 10.1007/s12350-020-02259-1] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2020] [Accepted: 06/22/2020] [Indexed: 01/19/2023]
Abstract
BACKGROUND There are limited data on the prognostic utility of regadenoson SPECT myocardial perfusion imaging (MPI) in patients with end-stage renal disease (ESRD). METHODS AND RESULTS In a single-center, retrospective study, we analyzed consecutive ESRD patients who underwent regadenoson SPECT-MPI. The severity of MPI abnormalities and ischemic burden were determined quantitatively. The primary endpoint was major adverse cardiac events (MACE), defined as the composite of cardiac death or myocardial infarction. Among 1,227 subjects (mean age 54 ± 13 years, 47% men), 60 (5%) MACE were observed during a mean follow-up of 2.5 ± 1.8 years. The presence and severity of MPI abnormalities and ischemic burden were associated with a stepwise increase in MACE risk. Abnormal MPI (SSS ≥ 4) was associated with increased MACE risk, independent and incremental to relevant clinical covariates; adjusted hazard ratio, 1.95; 95% confidence interval, 1.15-3.32; Δχ2 = 5.97; P = .013. Myocardial ischemia (SDS ≥ 2) was associated with a trend towards increased MACE risk; adjusted hazard ratio, 1.63; 95% confidence interval, 0.96-2.77; Δχ2 = 3.12; P = .072. CONCLUSION In the largest cohort to date, we demonstrated the incremental prognostic value of abnormal MPI in predicting MACE risk in ESRD patients. Given its size, our study provides improved risk estimates in this population compared to previous reports.
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Affiliation(s)
| | - Mina Iskander
- Division of Cardiology, Cook County Health, 1901 W. Harrison St, Chicago, IL, 60612, USA
| | - Fady Iskander
- Division of Cardiology, Cook County Health, 1901 W. Harrison St, Chicago, IL, 60612, USA
| | - Priya P Patel
- Department of Medicine, Rush University Medical Center, Chicago, IL, USA
| | - Rozi Khan
- Division of Cardiology, Rush University Medical Center, Chicago, IL, USA
- Department of Medicine, Medstar Union Memorial Hospital, Baltimore, MD, USA
| | - Rami Doukky
- Department of Medicine, Cook County Health, Chicago, IL, USA.
- Division of Cardiology, Cook County Health, 1901 W. Harrison St, Chicago, IL, 60612, USA.
- Department of Medicine, Rush University Medical Center, Chicago, IL, USA.
- Division of Cardiology, Rush University Medical Center, Chicago, IL, USA.
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Kattoor AJ, Kolkailah AA, Iskander F, Iskander M, Diep L, Khan R, Doukky R. The prognostic value of regadenoson SPECT myocardial perfusion imaging: The largest cohort to date. J Nucl Cardiol 2021; 28:2799-2807. [PMID: 32383079 DOI: 10.1007/s12350-020-02135-y] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2019] [Accepted: 04/06/2020] [Indexed: 01/30/2023]
Abstract
BACKGROUND Data on the prognostic value of regadenoson SPECT myocardial perfusion imaging (MPI) is limited and based on small cohorts. METHODS AND RESULTS We conducted a single-center, retrospective cohort study of 10,275 consecutive patients who underwent regadenoson SPECT-MPI. Among the study subjects, 28.7% had abnormal MPI and 25.5% had myocardial ischemia. Patients were followed for a mean of 2.4 ± 2.2 years for major adverse cardiac events (MACE), defined as cardiac death or myocardial infarction. There was a significant stepwise increase in MACE with an increasing burden of perfusion abnormality (P < .001) and myocardial ischemia (P < .001). Abnormal MPI (adjusted HR 1.52; 95% CI 1.21 to 1.91) and myocardial ischemia (adjusted HR 1.53; 95% CI 1.25 to 1.89) were associated with MACE, independent of and incremental to clinical covariates and left ventricular ejection fraction (LVEF). Moreover, post-stress LVEF, LVEF reserve, and left ventricular end-diastolic volume added significant prognostic information. Transient ischemic dilation ≥ 1.31 did not provide incremental prognostic value (adjusted HR 1.02; P = .906). CONCLUSION In the largest cohort to date, we demonstrated that the presence and severity of perfusion abnormality and myocardial ischemia on regadenoson stress SPECT-MPI are associated with an independent increase in MACE.
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Affiliation(s)
- Ajoe John Kattoor
- Division of Cardiology, Cook County Health, 1901 W. Harrison St., Chicago, IL, 60612, USA
| | | | - Fady Iskander
- Division of Cardiology, Cook County Health, 1901 W. Harrison St., Chicago, IL, 60612, USA
| | - Mina Iskander
- Division of Cardiology, Cook County Health, 1901 W. Harrison St., Chicago, IL, 60612, USA
| | - Lisa Diep
- Health Research and Solutions Unit, Cook County Health, Chicago, IL, USA
| | - Rozi Khan
- Division of Cardiology, Rush University Medical Center, Chicago, IL, USA
- Department of Medicine, Medstar Union Memorial Hospital, Baltimore, MD, USA
| | - Rami Doukky
- Division of Cardiology, Cook County Health, 1901 W. Harrison St., Chicago, IL, 60612, USA.
- Department of Medicine, Cook County Health, Chicago, IL, USA.
- Division of Cardiology, Rush University Medical Center, Chicago, IL, USA.
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Iskander F, Iskander M, Gomez J, Doukky R. Prognostic value of regadenoson stress myocardial perfusion imaging in patients with left bundle branch block or ventricular paced rhythm. J Nucl Cardiol 2021; 28:967-977. [PMID: 31144225 DOI: 10.1007/s12350-019-01762-4] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2019] [Accepted: 05/14/2019] [Indexed: 11/28/2022]
Abstract
BACKGROUND Vasodilator stress myocardial perfusion imaging (MPI) is the provocative test of choice in patients with left bundle branch block (LBBB) or ventricular paced (V-paced) rhythm. The prognostic value of regadenoson SPECT myocardial perfusion imaging (MPI) in these patients has not been studied. METHODS AND RESULTS We conducted a retrospective cohort study of 562 patients [mean age, 69 ± 11 years; men, 53.3%] with LBBB (50.7%) or V-paced rhythm (49.3%) who underwent regadenoson stress SPECT-MPI. There were 321 (57.1%) subjects with abnormal MPI and 192 (34.2%) with myocardial ischemia. During a mean follow-up of 2.5 ± 1.9 years, 39 (6.9%) patients had a major adverse cardiac event (MACE), defined as cardiac death or myocardial infarction. The annualized MACE rate in patients with normal MPI was 0.9% (LBBB, 0.8%; V-paced, 1.0%). There was a significant stepwise increase in MACE rates with increasing burdens of perfusion abnormality (P < 0.001) and myocardial ischemia (P = 0.001). Increased risk with abnormal MPI [adjusted hazard ratio, 4.26; P = 0.001] and myocardial ischemia [adjusted hazard ratio, 2.70; P = 0.003] was independent of and incremental to important clinical covariates. Abnormal MPI and myocardial ischemia predicted MACE similarly in both LBBB and V-paced subgroups (interaction P values > 0.05). CONCLUSION In patients with LBBB and V-paced rhythm, regadenoson stress SPECT-MPI provides independent and incremental prognostic value in predicting adverse cardiac events.
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Affiliation(s)
- Fady Iskander
- Division of Cardiology, Cook County Health, 1901 W. Harrison St, Chicago, IL, 60612, USA
| | - Mina Iskander
- Division of Cardiology, Cook County Health, 1901 W. Harrison St, Chicago, IL, 60612, USA
| | - Javier Gomez
- Division of Cardiology, Cook County Health, 1901 W. Harrison St, Chicago, IL, 60612, USA
| | - Rami Doukky
- Division of Cardiology, Cook County Health, 1901 W. Harrison St, Chicago, IL, 60612, USA.
- Division of Cardiology, Rush University Medical Center, Chicago, IL, USA.
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Juweid ME, Alhouri A, Baniissa B, Rimawi D, A-Risheq ZF, Rabadi N, Safi M, Akkawi M, Ismael AB, Alhanafi A, Alkhaldi S, Obeidat OS. Transient ischemic dilatation with adenosine 99mTc-sestamibi stress: prognostic significance in patients with normal myocardial perfusion. Ann Nucl Med 2021; 35:569-579. [PMID: 33689137 DOI: 10.1007/s12149-021-01599-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2020] [Accepted: 02/14/2021] [Indexed: 11/24/2022]
Abstract
OBJECTIVE To determine the significance of transient ischemic dilatation (TID) in patients with normal perfusion on adenosine stress/rest. METHODS We analyzed 430 consecutive patients with normal perfusion on 2-day adenosine stress/rest 99mTc-sestamibi. A group of 70 patients with Framingham 10-year coronary heart disease risk < 10% was used to derive abnormal TID thresholds (derivation group). The significance of TID at these thresholds was validated in the remaining 360 patients (validation group) followed for cardiac events for 31.2 ± 9.7 (mean ± SD) months. RESULTS Transient ischemic dilatation in the derivation group was 1.05 ± 0.13. Three definitions of an abnormal TID were used: > mean + 2SD (TID ≥ 1.32), > mean + 1SD (TID ≥ 1.19) and a TID in the group's highest quartile (TID ≥ 1.15). Of the 360 validation group patients, 12 (3.3%), 48 (13.3%) and 70 (19.4%) had TID ≥ 1.32, 1.19 and 1.15, respectively. Age, gender, family history of coronary artery disease (CAD), known CAD, smoking, hypertension, diabetes, dyslipidemia, rest LVEF, post-stress LVEF, ΔLVEF, ≥ 5% or 10% decrease in LVEF did not predict TID ≥ 1.32. However, TID ≥ 1.19 was predicted by rest LVEF and ≥ 5% decrease in LVEF (P = 0.04 and 0.02, respectively) and TID ≥ 1.15 was predicted by ≥ 5% decrease in LVEF (P = 0.02). Cardiac event-free survivals were similar in patients with a TID ≥ and < 1.32 (P = 0.68), ≥ and < 1.19 (P = 0.40) and ≥ and < 1.15 (P = 0.79). CONCLUSIONS Transient ischemic dilatation does not confer adverse prognosis in patients with normal perfusion on adenosine stress/rest 99mTc-sestamibi irrespective of the threshold used for its definition.
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Affiliation(s)
- Malik E Juweid
- Division of Nuclear Medicine, Department of Radiology and Nuclear Medicine, University of Jordan Hospital, University of Jordan, Queen Rania Street, Al Jubeiha, Amman, 11942, Jordan.
| | - Abdullah Alhouri
- Division of Cardiology, Department of Medicine, University of Jordan, Amman, Jordan
| | - Bayan Baniissa
- Division of Cardiology, Department of Medicine, University of Jordan, Amman, Jordan
| | | | - Ziad F A-Risheq
- Division of Nuclear Medicine, Department of Radiology and Nuclear Medicine, University of Jordan Hospital, University of Jordan, Queen Rania Street, Al Jubeiha, Amman, 11942, Jordan
| | - Nidal Rabadi
- Division of Nuclear Medicine, Department of Radiology and Nuclear Medicine, University of Jordan Hospital, University of Jordan, Queen Rania Street, Al Jubeiha, Amman, 11942, Jordan
| | - Mohannad Safi
- Division of Cardiology, Department of Medicine, University of Jordan, Amman, Jordan
| | - Mohammad Akkawi
- Division of Cardiology, Department of Medicine, University of Jordan, Amman, Jordan
| | - Anas Bany Ismael
- Division of Cardiology, Department of Medicine, University of Jordan, Amman, Jordan
| | - Aiman Alhanafi
- Division of Cardiology, Department of Medicine, University of Jordan, Amman, Jordan
| | - Saif Alkhaldi
- Division of Cardiology, Department of Medicine, University of Jordan, Amman, Jordan
| | - Omar S Obeidat
- Division of Cardiology, Department of Medicine, University of Jordan, Amman, Jordan
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Doukky R, Nigatu A, Khan R, Anokwute C, Fughhi I, Ayoub A, Iskander F, Iskander M, Kola S, Sahyouni M, Karavolos K, Hota BN, Gomez J. Prognostic significance of ischemic electrocardiographic changes with regadenoson stress myocardial perfusion imaging. J Nucl Cardiol 2020; 27:1521-1532. [PMID: 30132187 DOI: 10.1007/s12350-018-1415-4] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2018] [Accepted: 08/10/2018] [Indexed: 12/21/2022]
Abstract
BACKGROUND In patients undergoing regadenoson SPECT myocardial perfusion imaging (MPI), the prognostic value of ischemic ST-segment depression (ST↓) and the optimal ST↓ threshold have not been studied. METHODS A retrospective cohort study of consecutive patients referred for regadenoson stress MPI was conducted. Patients with uninterpretable ECG were excluded. Two diagnostic thresholds of horizontal or downsloping ST↓ were studied, ≥ 0.5 mm and ≥ 1.0 mm. The primary endpoint was the composite major adverse cardiac events (MACE) of cardiac death, myocardial infarction, or coronary revascularization. RESULTS Among 8615 subjects (mean age 62 ± 13 years; 55% women), 89 (1.0%) had ST↓ ≥ 1.0 mm and 133 (1.5%) had ST↓ ≥ 0.5 mm. Regadenoson-induced ST↓ was more common in women (P < .001). Mean follow-up was 2.5 ± 2.2 years. After multivariate adjustment, ST↓ ≥ 1.0 mm was associated with a non-significant increase in MACE risk (P = .069), irrespective to whether MPI was abnormal (P = .162) or normal (P = .214). Ischemic ST↓ ≥ 0.5 mm was independently associated with MACE in the entire cohort (HR 2.14; CI 1.38-3.32; P = .001), whether MPI is normal (HR 2.07; CI 1.07-4.04; P = .032) or abnormal (HR 2.24; CI 1.23-4.00; P = .007), after adjusting for clinical and imaging covariates. An ST↓ threshold of ≥ 0.5 mm provided greater incremental prognostic value beyond clinical and imaging parameters (Δχ2 = 12.78; P < .001) than ≥ 1.0 mm threshold (Δχ2 = 3.72; P = .093). CONCLUSION Regadenoson-induced ischemic ST↓ is more common in women and it provides a modest independent prognostic value beyond MPI and clinical parameters. ST↓ ≥ 0.5 mm is a better threshold than ≥ 1.0 mm to define ECG evidence for regadenoson-induced myocardial ischemia.
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Affiliation(s)
- Rami Doukky
- Division of Cardiology, Cook County Health and Hospitals System, 1901 W. Harrison St., Chicago, IL, 60612, USA.
- Division of Cardiology, Rush University Medical Center, Chicago, IL, USA.
- Department of Preventive Medicine, Rush University Medical Center, Chicago, IL, USA.
- Department of Medicine, Rush University Medical Center, Chicago, IL, USA.
| | - Abiy Nigatu
- Division of Cardiology, Cook County Health and Hospitals System, 1901 W. Harrison St., Chicago, IL, 60612, USA
| | - Rozi Khan
- Division of Cardiology, Rush University Medical Center, Chicago, IL, USA
| | - Chiedozie Anokwute
- Division of Cardiology, Rush University Medical Center, Chicago, IL, USA
| | - Ibtihaj Fughhi
- Division of Cardiology, Rush University Medical Center, Chicago, IL, USA
| | - Ali Ayoub
- Division of Cardiology, Cook County Health and Hospitals System, 1901 W. Harrison St., Chicago, IL, 60612, USA
| | - Fady Iskander
- Division of Cardiology, Cook County Health and Hospitals System, 1901 W. Harrison St., Chicago, IL, 60612, USA
| | - Mina Iskander
- Division of Cardiology, Cook County Health and Hospitals System, 1901 W. Harrison St., Chicago, IL, 60612, USA
| | - Snigdha Kola
- Division of Cardiology, Rush University Medical Center, Chicago, IL, USA
| | - Mark Sahyouni
- Division of Cardiology, Rush University Medical Center, Chicago, IL, USA
| | - Kelly Karavolos
- Department of Preventive Medicine, Rush University Medical Center, Chicago, IL, USA
| | - Bala N Hota
- Department of Medicine, Rush University Medical Center, Chicago, IL, USA
| | - Javier Gomez
- Division of Cardiology, Cook County Health and Hospitals System, 1901 W. Harrison St., Chicago, IL, 60612, USA
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Hu LH, Sharir T, Miller RJH, Einstein AJ, Fish MB, Ruddy TD, Dorbala S, Di Carli M, Kaufmann PA, Sinusas AJ, Miller EJ, Bateman TM, Betancur J, Germano G, Liang JX, Commandeur F, Azadani PN, Gransar H, Otaki Y, Tamarappoo BK, Dey D, Berman DS, Slomka PJ. Upper reference limits of transient ischemic dilation ratio for different protocols on new-generation cadmium zinc telluride cameras: A report from REFINE SPECT registry. J Nucl Cardiol 2020; 27:1180-1189. [PMID: 31087268 PMCID: PMC6851400 DOI: 10.1007/s12350-019-01730-y] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2018] [Accepted: 04/03/2019] [Indexed: 11/29/2022]
Abstract
BACKGROUND Upper reference limits for transient ischemic dilation (TID) have not been rigorously established for cadmium-zinc-telluride (CZT) camera systems. We aimed to derive TID limits for common myocardial perfusion imaging protocols utilizing a large, multicenter registry (REFINE SPECT). METHODS One thousand six hundred and seventy-two patients with low likelihood of coronary artery disease with normal perfusion findings were identified. Images were processed with Quantitative Perfusion SPECT software (Cedars-Sinai Medical Center, Los Angeles, CA). Non-attenuation-corrected, camera-, radiotracer-, and stress protocol-specific TID limits in supine position were derived from 97.5th percentile and mean + 2 standard deviations (SD). Reference limits were compared for different solid-state cameras (D-SPECT vs. Discovery), radiotracers (technetium-99m-sestamibi vs. tetrofosmin), different types of stress (exercise vs. four different vasodilator-based protocols), and different vasodilator-based protocols. RESULTS TID measurements did not follow Gaussian distribution in six out of eight subgroups. TID limits ranged from 1.18 to 1.52 (97.5th percentile) and 1.18 to 1.39 (mean + 2SD). No difference was noted between D-SPECT and Discovery cameras (P = 0.71) while differences between exercise and vasodilator-based protocols (adenosine, regadenoson, or regadenoson-walk) were noted (all P < 0.05). CONCLUSIONS We used a multicenter registry to establish camera-, radiotracer-, and protocol-specific upper reference limits of TID for supine position on CZT camera systems. Reference limits did not differ between D-SPECT and Discovery camera.
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Affiliation(s)
- Lien-Hsin Hu
- Department of Imaging (Division of Nuclear Medicine), Medicine, and Biomedical Sciences, Cedars-Sinai Medical Center, 8700 Beverly Boulevard, Ste. A047N, Los Angeles, CA, 90048, USA
- Department of Nuclear Medicine, Taipei Veterans General Hospital, Taipei, Taiwan
| | - Tali Sharir
- Department of Nuclear Cardiology, Assuta Medical Center, Tel Aviv, Israel
- Ben Gurion University of the Negev, Beer Sheba, Israel
| | - Robert J H Miller
- Department of Imaging (Division of Nuclear Medicine), Medicine, and Biomedical Sciences, Cedars-Sinai Medical Center, 8700 Beverly Boulevard, Ste. A047N, Los Angeles, CA, 90048, USA
| | - Andrew J Einstein
- Division of Cardiology, Department of Medicine, and Department of Radiology, Columbia University Irving Medical Center and New York-Presbyterian Hospital, New York, NY, USA
| | - Mathews B Fish
- Oregon Heart and Vascular Institute, Sacred Heart Medical Center, Springfield, OR, USA
| | - Terrence D Ruddy
- Division of Cardiology, University of Ottawa Heart Institute, Ottawa, ON, Canada
| | - Sharmila Dorbala
- Division of Nuclear Medicine and Molecular Imaging, Department of Radiology, Brigham and Women's Hospital, Boston, MA, USA
| | - Marcelo Di Carli
- Division of Nuclear Medicine and Molecular Imaging, Department of Radiology, Brigham and Women's Hospital, Boston, MA, USA
| | - Philipp A Kaufmann
- Department of Nuclear Medicine, Cardiac Imaging, University Hospital Zurich, Zurich, Switzerland
| | - Albert J Sinusas
- Section of Cardiovascular Medicine, Department of Internal Medicine, Yale University School of Medicine, New Haven, CT, USA
| | - Edward J Miller
- Section of Cardiovascular Medicine, Department of Internal Medicine, Yale University School of Medicine, New Haven, CT, USA
| | | | - Julian Betancur
- Department of Imaging (Division of Nuclear Medicine), Medicine, and Biomedical Sciences, Cedars-Sinai Medical Center, 8700 Beverly Boulevard, Ste. A047N, Los Angeles, CA, 90048, USA
| | - Guido Germano
- Department of Imaging (Division of Nuclear Medicine), Medicine, and Biomedical Sciences, Cedars-Sinai Medical Center, 8700 Beverly Boulevard, Ste. A047N, Los Angeles, CA, 90048, USA
| | - Joanna X Liang
- Department of Imaging (Division of Nuclear Medicine), Medicine, and Biomedical Sciences, Cedars-Sinai Medical Center, 8700 Beverly Boulevard, Ste. A047N, Los Angeles, CA, 90048, USA
| | - Frederic Commandeur
- Department of Imaging (Division of Nuclear Medicine), Medicine, and Biomedical Sciences, Cedars-Sinai Medical Center, 8700 Beverly Boulevard, Ste. A047N, Los Angeles, CA, 90048, USA
| | - Peyman N Azadani
- Department of Imaging (Division of Nuclear Medicine), Medicine, and Biomedical Sciences, Cedars-Sinai Medical Center, 8700 Beverly Boulevard, Ste. A047N, Los Angeles, CA, 90048, USA
| | - Heidi Gransar
- Department of Imaging (Division of Nuclear Medicine), Medicine, and Biomedical Sciences, Cedars-Sinai Medical Center, 8700 Beverly Boulevard, Ste. A047N, Los Angeles, CA, 90048, USA
| | - Yuka Otaki
- Department of Imaging (Division of Nuclear Medicine), Medicine, and Biomedical Sciences, Cedars-Sinai Medical Center, 8700 Beverly Boulevard, Ste. A047N, Los Angeles, CA, 90048, USA
| | - Balaji K Tamarappoo
- Department of Imaging (Division of Nuclear Medicine), Medicine, and Biomedical Sciences, Cedars-Sinai Medical Center, 8700 Beverly Boulevard, Ste. A047N, Los Angeles, CA, 90048, USA
| | - Damini Dey
- Department of Imaging (Division of Nuclear Medicine), Medicine, and Biomedical Sciences, Cedars-Sinai Medical Center, 8700 Beverly Boulevard, Ste. A047N, Los Angeles, CA, 90048, USA
| | - Daniel S Berman
- Department of Imaging (Division of Nuclear Medicine), Medicine, and Biomedical Sciences, Cedars-Sinai Medical Center, 8700 Beverly Boulevard, Ste. A047N, Los Angeles, CA, 90048, USA
| | - Piotr J Slomka
- Department of Imaging (Division of Nuclear Medicine), Medicine, and Biomedical Sciences, Cedars-Sinai Medical Center, 8700 Beverly Boulevard, Ste. A047N, Los Angeles, CA, 90048, USA.
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14
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Miller RJH, Hu LH, Gransar H, Betancur J, Eisenberg E, Otaki Y, Sharir T, Fish MB, Ruddy TD, Dorbala S, Carli MD, Einstein AJ, Kaufmann PA, Sinusas AJ, Miller EJ, Bateman T, Germano G, Tamarappoo BK, Dey D, Berman DS, Slomka PJ. Transient ischaemic dilation and post-stress wall motion abnormality increase risk in patients with less than moderate ischaemia: analysis of the REFINE SPECT registry. Eur Heart J Cardiovasc Imaging 2020; 21:567-575. [PMID: 31302679 PMCID: PMC7167750 DOI: 10.1093/ehjci/jez172] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/07/2019] [Revised: 04/03/2019] [Accepted: 06/25/2019] [Indexed: 11/13/2022] Open
Abstract
AIMS Ischaemia on single-photon emission computed tomography (SPECT) myocardial perfusion imaging (MPI) is strongly associated with cardiovascular risk. Transient ischaemic dilation (TID) and post-stress wall motion abnormalities (WMA) are non-perfusion markers of ischaemia with incremental prognostic utility. Using a large, multicentre SPECT MPI registry, we assessed the degree to which these features increased the risk of major adverse cardiovascular events (MACE) in patients with less than moderate ischaemia. METHODS AND RESULTS Ischaemia was quantified with total perfusion deficit using semiautomated software and classified as: none (<1%), minimal (1 to <5%), mild (5 to <10%), moderate (10 to <15%), and severe (≥15%). Univariable and multivariable Cox proportional hazard analyses were used to assess associations between high-risk imaging features and MACE. We included 16 578 patients, mean age 64.2 and median follow-up 4.7 years. During follow-up, 1842 patients experienced at least one event. Patients with mild ischaemia and TID were more likely to experience MACE compared with patients without TID [adjusted hazard ratio (HR) 1.42, P = 0.023], with outcomes not significantly different from patients with moderate ischaemia without other high-risk features (unadjusted HR 1.15, P = 0.556). There were similar findings in patients with post-stress WMA. However, in multivariable analysis of patients with mild ischaemia, TID (adjusted HR 1.50, P = 0.037), but not WMA, was independently associated with increased MACE. CONCLUSION In patients with mild ischaemia, TID or post-stress WMA identify groups of patients with outcomes similar to patients with moderate ischaemia. Whether these combinations identify patients who may derive benefit from revascularization deserves further investigation.
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Affiliation(s)
- Robert J H Miller
- Department of Imaging, Medicine, and Biomedical Sciences, Cedars-Sinai Medical Center, 8700 Beverly Blvd, Los Angeles, CA 90048, USA
| | - Lien-Hsin Hu
- Department of Imaging, Medicine, and Biomedical Sciences, Cedars-Sinai Medical Center, 8700 Beverly Blvd, Los Angeles, CA 90048, USA
- Department of Nuclear Medicine, Taipei Veterans General Hospital, No. 201, Section 2, Shipai Road, Taipei, Taiwan
| | - Heidi Gransar
- Department of Imaging, Medicine, and Biomedical Sciences, Cedars-Sinai Medical Center, 8700 Beverly Blvd, Los Angeles, CA 90048, USA
| | - Julian Betancur
- Department of Imaging, Medicine, and Biomedical Sciences, Cedars-Sinai Medical Center, 8700 Beverly Blvd, Los Angeles, CA 90048, USA
| | - Evann Eisenberg
- Department of Imaging, Medicine, and Biomedical Sciences, Cedars-Sinai Medical Center, 8700 Beverly Blvd, Los Angeles, CA 90048, USA
| | - Yuka Otaki
- Department of Imaging, Medicine, and Biomedical Sciences, Cedars-Sinai Medical Center, 8700 Beverly Blvd, Los Angeles, CA 90048, USA
| | - Tali Sharir
- Department of Nuclear Cardiology, Assuta Medical Center, HaBarzel St 20, Tel Aviv, Israel
| | - Mathews B Fish
- Department of Nuclear Medicine, Oregon Heart and Vascular Institute, Sacred Heart Medical Center, 3333 Riverbend Dr, Springfield, OR 97477, USA
| | - Terrence D Ruddy
- Division of Cardiology, University of Ottawa Heart Institute, 40 Ruskin St, Ottawa, ON K1Y 4W7, Canada
| | - Sharmila Dorbala
- Division of Nuclear Medicine and Molecular Imaging, Department of Radiology, Brigham and Women’s Hospital, 75 Francis St, Boston, MA 02115, USA
| | - Marcelo Di Carli
- Division of Nuclear Medicine and Molecular Imaging, Department of Radiology, Brigham and Women’s Hospital, 75 Francis St, Boston, MA 02115, USA
| | - Andrew J Einstein
- Division of Cardiology, Department of Medicine, Columbia University Irving Medical Center, 622 W 168th St, New York, NY 10032, USA
- Department of Radiology and Herbert Irving Comprehensive Cancer Center, Columbia University Irving Medical Center, 622 W 168th St, New York, NY 10032, USA
| | - Philipp A Kaufmann
- Department of Nuclear Medicine, Cardiac Imaging, University Hospital Zurich, Rämistrasse 100, 8091 Zurich, Switzerland
| | - Albert J Sinusas
- Department of Internal Medicine, Section of Cardiovascular Medicine, Yale University, 333 Cedar St, New Haven, CT 06510, USA
| | - Edward J Miller
- Department of Internal Medicine, Section of Cardiovascular Medicine, Yale University, 333 Cedar St, New Haven, CT 06510, USA
| | - Timothy Bateman
- Cardiovascular Imaging Technologies LLC, 4320 Wornall Rd, Kansas City, MO 64111, USA
| | - Guido Germano
- Department of Imaging, Medicine, and Biomedical Sciences, Cedars-Sinai Medical Center, 8700 Beverly Blvd, Los Angeles, CA 90048, USA
| | - Balaji K Tamarappoo
- Department of Imaging, Medicine, and Biomedical Sciences, Cedars-Sinai Medical Center, 8700 Beverly Blvd, Los Angeles, CA 90048, USA
| | - Damini Dey
- Department of Imaging, Medicine, and Biomedical Sciences, Cedars-Sinai Medical Center, 8700 Beverly Blvd, Los Angeles, CA 90048, USA
| | - Daniel S Berman
- Department of Imaging, Medicine, and Biomedical Sciences, Cedars-Sinai Medical Center, 8700 Beverly Blvd, Los Angeles, CA 90048, USA
| | - Piotr J Slomka
- Department of Imaging, Medicine, and Biomedical Sciences, Cedars-Sinai Medical Center, 8700 Beverly Blvd, Los Angeles, CA 90048, USA
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Romero-Farina G, Candell-Riera J, Aguadé-Bruix S, García Dorado D. A novel clinical risk prediction model for myocardial infarction, coronary revascularization, and cardiac death according to clinical, exercise, and gated SPECT variables (VH-RS). Eur Heart J Cardiovasc Imaging 2020; 21:210-221. [PMID: 31049558 DOI: 10.1093/ehjci/jez078] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/29/2018] [Accepted: 04/02/2019] [Indexed: 01/11/2023] Open
Abstract
AIMS To create a risk score for cardiac events (CE) according to clinical, exercise, and gated SPECT variables. METHODS AND RESULTS We analysed 5707 consecutive patients; 3181 patients (age 64.2 ± 11 years, male 59.6%) with suspected coronary artery disease (CAD) [without previous myocardial infarction (MI) or coronary revascularization (CR)] and 2526 patients (age 63.3 ± 11 years, male 81.7%) with established CAD (with previous MI or CR). To create the Vall d'Hebron Risk Score (VH-RS), first we analyse the predictors of CE (non-fatal MI, CR, and/or cardiac death), then the probability of CE for every patient according to the predictive variables. According to risk we stratified patients into four risk levels: very low risk (VLR), low risk (LR), moderate risk (MR), and high risk (HRi) using Multiple Cox Regression analysis models. Finally, we validate the VH-RS in another prospective cohort of 734 patients. In patients with suspected CAD; age (P < 0.001); gender (P = 0.001); hyperlipidaemia (P < 0.001); nitrates (P = 0.04); ejection fraction (EF) (P = 0.001); summed stress score (P < 0.001); METs (P < 0.001); exercise angina (P = 0.006); and mm of ST segment depression (P = 0.004) were the independent predictors of CE (C-statistic: 0.8; P < 0.001). In patients with established CAD, EF (P < 0.001); summed difference score (P = 0.001); age (P < 0.001); smoker (P = 0.002); nitrates (P = 0.003); exercise angina (P = 0.001); METs (P < 0.001); and mm of ST segment depression (P = 0.011) were the independent predictors of CE (C-statistic: 0.7; P < 0.001). The risk score obtained from these variables allows the stratification of patients into four risk levels: VLR, LR, MR, and HRi. CONCLUSIONS The cardiac risk stratification by mean of clinical, exercise, and gated SPECT variables is an objective aid to assessing an individual's cardiac risk.
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Affiliation(s)
- Guillermo Romero-Farina
- Cardiology Department, Hospital Universitari Vall d'Hebron, Institut de Recerca (VHIR), Universitat Autònoma de Barcelona, Paseo Vall d'Hebron 119-129, Barcelona 08035, Spain.,Department of Nuclear Medicine, Hospital Universitari Vall d'Hebron, Institut de Recerca (VHIR), Universitat Autònoma de Barcelona, Paseo Vall d'Hebron 119-129, Barcelona 08035, Spain
| | - Jaume Candell-Riera
- Cardiology Department, Hospital Universitari Vall d'Hebron, Institut de Recerca (VHIR), Universitat Autònoma de Barcelona, Paseo Vall d'Hebron 119-129, Barcelona 08035, Spain
| | - Santiago Aguadé-Bruix
- Department of Nuclear Medicine, Hospital Universitari Vall d'Hebron, Institut de Recerca (VHIR), Universitat Autònoma de Barcelona, Paseo Vall d'Hebron 119-129, Barcelona 08035, Spain
| | - David García Dorado
- Cardiology Department, Hospital Universitari Vall d'Hebron, Institut de Recerca (VHIR), Universitat Autònoma de Barcelona, Paseo Vall d'Hebron 119-129, Barcelona 08035, Spain
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Tomas V, Nestor V. Is left ventricular systolic index the new kid in the block? J Nucl Cardiol 2019; 26:1157-1160. [PMID: 29359270 PMCID: PMC6054899 DOI: 10.1007/s12350-017-1170-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2017] [Accepted: 11/30/2017] [Indexed: 11/29/2022]
Affiliation(s)
- Vita Tomas
- Cardiovascular Imaging Program, Departments of Medicine (Cardiovascular Division) and Radiology, Brigham and Women's Hospital, Boston, USA
| | - Vita Nestor
- Cardiovascular Division, Italian Hospital of Rosario, Rosario, Argentina.
- Cardiovascular Instituto of Rosario "Dr. González Sabathie", Rosario, Argentina.
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17
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Hasbek Z, Ertürk SA, Çakmakçılar A, Gül İ, Yılmaz A. Evaluation of Myocardial Perfusion Imaging SPECT Parameters and Pharmacologic Stress Test with Adenosine Versus Coronary Angiography Findings: Are They Diagnostically Concordant? Mol Imaging Radionucl Ther 2019; 28:53-61. [PMID: 31237135 PMCID: PMC6592312 DOI: 10.4274/mirt.galenos.2019.47450] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022] Open
Abstract
Objectives: In this study our first aim was to evaluate the diagnostic concordance of myocardial perfusion scintigraphy (MPS) by pharmacological stress test with adenosine (APST) with coronary angiography (CAG). The secondary aim of this study was to evaluate the correlation between CAG findings and automated analysis parameters such as left ventricular ejection fraction, summed stress score (SSS), summed rest score, summed difference score (SDS), stress MPS defect percentage ratio (extent) and transient ischemic dilation (TID) obtained by myocardial perfusion imaging single-photon emission computed tomography (SPECT). Methods: A total of 129 patients (62 male, 67 female, median age: 60.02) undergoing MPS due to suspicion of coronary ischemia who also underwent subsequent CAG in the last year were included in this study, their MPS data and CAG results were compared. Results: There was no statistically significant diagnostic concordance when visual evaluation of MPS, quantitative MPS parameters and exercise treadmill test (ETT) electrocardiography results were used alone. In fact, diagnostic concordance was higher when automated analysis parameters like TID, SSS and extent values were added to MPS SPECT visual analyses. There was diagnostic concordance in 57.9% of APST patients and 41.7% of ETT patients. There was diagnostic concordance in 75.8% of APST patients and 52.6% of ETT patients who were older than 65 years of age. Conclusion: In our study, we found that the use of APST during MPS increases diagnostic concordance with CAG. Therefore, we think that it would be appropriate to use APST in women and elderly patients with limited exercise habits. The CAG diagnostic mismatch is far above what it should be when MPS reporting is only done with visual data, and it is not supported by quantitative data such as TID, SSS, SDS and extent.
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Affiliation(s)
- Zekiye Hasbek
- Cumhuriyet University Faculty of Medicine, Department of Nuclear Medicine, Sivas, Turkey
| | - Seyit Ahmet Ertürk
- Cumhuriyet University Faculty of Medicine, Department of Nuclear Medicine, Sivas, Turkey
| | - Ali Çakmakçılar
- Cumhuriyet University Faculty of Medicine, Department of Nuclear Medicine, Sivas, Turkey
| | - İbrahim Gül
- Cumhuriyet University Faculty of Medicine, Department of Cardiology, Sivas, Turkey
| | - Ahmet Yılmaz
- Cumhuriyet University Faculty of Medicine, Department of Cardiology, Sivas, Turkey
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18
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Gomez J, Doukky R. Artificial Intelligence in Nuclear Cardiology. J Nucl Med 2019; 60:1042-1043. [DOI: 10.2967/jnumed.118.222356] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2019] [Accepted: 03/18/2019] [Indexed: 02/02/2023] Open
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Gomez J, Golzar Y, Fughhi I, Olusanya A, Doukky R. The significance of post-stress decrease in left ventricular ejection fraction in patients undergoing regadenoson stress gated SPECT myocardial perfusion imaging. J Nucl Cardiol 2018; 25:1313-1323. [PMID: 28181156 DOI: 10.1007/s12350-017-0802-6] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2016] [Accepted: 01/20/2017] [Indexed: 10/20/2022]
Abstract
BACKGROUND The significance of post-stress decrease in left ventricular ejection fraction (LVEF) with regadenoson stress gated SPECT (GSPECT) myocardial perfusion imaging (MPI) has not been studied. METHODS AND RESULTS Consecutive patients who underwent rest/regadenoson stress GSPECT-MPI followed by coronary angiography within 6 months were analyzed. Change in LVEF by GSPECT-MPI was calculated as stress LVEF minus rest LVEF; a significant decrease was tested at 5% and 10% thresholds. In a diagnostic cohort of 793 subjects, LVEF change was not predictive of severe/extensive coronary artery disease (area under the curve, 0.50; 95% confidence interval, 0.44-0.57; P = 0.946). There was no significant difference in the rates of severe/extensive coronary artery disease in patients with or without a decrease in LVEF, irrespective of MPI findings. In an outcome cohort of the 929 subjects followed for 30 ± 16 months, post-regadenoson stress decrease in LVEF was not associated with increased risk of the composite endpoint of cardiac death or myocardial infarction or in the risk of coronary revascularization. CONCLUSIONS In patients selected to undergo coronary angiography following regadenoson stress GSPECT-MPI, a decrease in LVEF after regadenoson stress is not predictive of severe/extensive CAD or adverse clinical outcomes, irrespective of MPI findings.
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Affiliation(s)
- Javier Gomez
- Division of Cardiology, John H. Stroger, Jr. Hospital of Cook County, 1901 W. Harrison St., Suite # 3620, Chicago, IL, 60612, USA
| | - Yasmeen Golzar
- Division of Cardiology, John H. Stroger, Jr. Hospital of Cook County, 1901 W. Harrison St., Suite # 3620, Chicago, IL, 60612, USA
| | - Ibtihaj Fughhi
- Division of Cardiology, Rush University Medical Center, Chicago, IL, USA
| | - Adebayo Olusanya
- Division of Cardiology, John H. Stroger, Jr. Hospital of Cook County, 1901 W. Harrison St., Suite # 3620, Chicago, IL, 60612, USA
- Division of Cardiology, Rutgers, New Jersey Medical School, Newark, NJ, USA
| | - Rami Doukky
- Division of Cardiology, John H. Stroger, Jr. Hospital of Cook County, 1901 W. Harrison St., Suite # 3620, Chicago, IL, 60612, USA.
- Division of Cardiology, Rush University Medical Center, Chicago, IL, USA.
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20
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Alama M, Labos C, Emery H, Iwanochko RM, Freeman M, Husain M, Lee DS. Diagnostic and prognostic significance of transient ischemic dilation (TID) in myocardial perfusion imaging: A systematic review and meta-analysis. J Nucl Cardiol 2018; 25:724-737. [PMID: 28948540 PMCID: PMC5966496 DOI: 10.1007/s12350-017-1040-7] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2016] [Accepted: 06/06/2017] [Indexed: 11/24/2022]
Abstract
BACKGROUND Transient ischemic dilatation (TID) of the left ventricle is a potential marker of high risk obstructive coronary artery disease on stress myocardial perfusion imaging (MPI). There is, however, interstudy variation in the diagnostic performance of TID for identification of severe and extensive coronary disease anatomy, and varied prognostic implications in the published literature. METHODS We searched MEDLINE, EMBASE, and COCHRANE databases for studies where TID was compared with invasive or CT coronary angiography for evaluation of coronary artery stenosis. Two reviewers independently evaluated and abstracted data from each study. A bivariate random effects model was used to derive pooled sensitivities and specificities, in order to account for correlation between TID in MPI and anatomic disease severity. RESULTS A total of 525 articles were reviewed, of which 51 met inclusion criteria. Thirty-one studies contributed to the analysis, representing a total of 2037 patients in the diagnostic meta-analysis and 9003 patients in the review of prognosis. The ratio above which TID was deemed present ranged from 1.13 to 1.38. Pooled sensitivity was 44% (95% CI 30%-60%) and specificity was 88% (95% CI 83%-92%) for the detection of extensive or severe anatomic coronary artery disease. Analysis of outcome data demonstrated increased cardiac event rates in patients with TID and an abnormal MPI. In otherwise normal perfusion, TID is an indicator of poor prognosis in patients with diabetes and/or a history of coronary disease. CONCLUSIONS Among patients undergoing MPI, the presence of TID is specific for the detection of extensive or severe coronary artery disease.
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Affiliation(s)
- Mohamed Alama
- Division of Cardiology, Peter Munk Cardiac Center and the Joint Department of Medical Imaging, Toronto, Canada
- Department of Medicine, University of Toronto, Toronto, Canada
| | | | - Handel Emery
- University of the West Indies, Kingston, Jamaica
| | - Robert M Iwanochko
- Division of Cardiology, Peter Munk Cardiac Center and the Joint Department of Medical Imaging, Toronto, Canada
- Department of Medicine, University of Toronto, Toronto, Canada
| | - Michael Freeman
- St. Michael's Hospital, Toronto, Canada
- Department of Medicine, University of Toronto, Toronto, Canada
| | - Mansoor Husain
- Division of Cardiology, Peter Munk Cardiac Center and the Joint Department of Medical Imaging, Toronto, Canada
- Department of Medicine, University of Toronto, Toronto, Canada
- Ted Rogers Centre for Heart Research, Toronto, Canada
| | - Douglas S Lee
- Division of Cardiology, Peter Munk Cardiac Center and the Joint Department of Medical Imaging, Toronto, Canada.
- Institute for Clinical Evaluative Sciences, Toronto, Canada.
- Department of Medicine, University of Toronto, Toronto, Canada.
- Ted Rogers Centre for Heart Research, Toronto, Canada.
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Sharir T. Transient ischemic dilation: An old but not obsolete marker of extensive coronary artery disease. J Nucl Cardiol 2018; 25:738-741. [PMID: 28975548 DOI: 10.1007/s12350-017-1082-x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2017] [Accepted: 09/05/2017] [Indexed: 10/18/2022]
Affiliation(s)
- Tali Sharir
- Department of Nuclear Cardiology, Assuta Medical Center, 96 Igal Alon, C Building, 67891, Tel Aviv, Israel.
- Faculty of Health Sciences, Ben Gurion University of the Negev, Beer Sheba, Israel.
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Doukky R. Deciding wisely: A case for an effective use of myocardial perfusion imaging. J Nucl Cardiol 2018; 25:53-61. [PMID: 29188433 DOI: 10.1007/s12350-017-1136-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2017] [Accepted: 11/17/2017] [Indexed: 10/18/2022]
Abstract
There is a vast body of literature supporting the use of stress myocardial perfusion imaging (MPI) in patients with known or suspected coronary artery disease. When applied in the appropriate clinical setting, MPI can aid, not only in diagnosis and risk stratification, but also in decision-making. In a case of a 58-year-old man with suspected coronary artery disease, we highlight how the appropriate use of stress MPI can leverage the diagnostic and prognostic utility of MPI in an effective, evidence-based decision-making aimed to achieve the best patient outcome.
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Affiliation(s)
- Rami Doukky
- Division of Cardiology, Cook County Health and Hospitals System, 1901 W. Harrison St, Chicago, IL, 60612, USA.
- Division of Cardiology, Rush University Medical Center, Chicago, IL, USA.
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Massardo T, Alarcón L, Spuler J. Estratificación de riesgo de enfermedad coronaria con métodos isotópicos. Estado actual de la práctica clínica. Rev Esp Med Nucl Imagen Mol 2017; 36:377-387. [DOI: 10.1016/j.remn.2017.06.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2017] [Revised: 06/07/2017] [Accepted: 06/14/2017] [Indexed: 11/28/2022]
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Massardo T, Alarcón L, Spuler J. Risk stratification of coronary artery disease using radionuclides. Current status of clinical practice. Rev Esp Med Nucl Imagen Mol 2017. [DOI: 10.1016/j.remnie.2017.09.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Jameria ZA, Abdallah M, Dwivedi A, Washburn E, Khan N, Khaleghi M, Kalakota N, Gerson MC. Computer derived transient ischemic dilation ratio for identifying extensive coronary artery disease using a CZT camera and imaging in the upright position. J Nucl Cardiol 2017; 24:1702-1708. [PMID: 27311453 DOI: 10.1007/s12350-016-0515-2] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2016] [Revised: 04/11/2016] [Indexed: 12/20/2022]
Abstract
BACKGROUND Transient ischemic dilation (TID) of the left ventricle (LV) has not been validated as a marker of extensive coronary artery disease (CAD) for studies using a cadmium-zinc-telluride (CZT) camera with upright imaging. METHODS TID ratios were obtained from upright stress and rest images on a CZT camera. Separate cut-off values were determined for exercise and for regadenoson stress. The cutoffs were then applied to 28 patients with extensive CAD and 101 patients without extensive CAD. RESULTS With treadmill exercise, an upright TID ratio ≥1.16 provided a positive predictive value of 50% and a negative predictive value of 85.4% for the identification of extensive CAD. In the regadenoson group, an upright TID ratio of 1.29 provided a positive predictive value of 20% and a negative predictive value of 75.9%. Although not an independent predictor of extensive CAD in all subjects, in subjects with a normal upright LVEF, it provided a predictive value by receiver operating characteristics comparable to the SSS. CONCLUSIONS Increased upright TID measurements on a CZT camera are associated with extensive CAD. The upright TID measurements can serve in an adjunctive role to SSS, and may be most effective in patients with a normal upright exercise LVEF.
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Affiliation(s)
- Zenith A Jameria
- Division of Cardiology, Department of Internal Medicine, University of Illinois at Chicago, Chicago, IL, USA
| | - Mouhamad Abdallah
- Division of Cardiology, Department of Internal Medicine, University of Cincinnati Medical Center, 231 Albert Sabin Way, Cincinnati, OH, 45267-0542, USA
| | - Alok Dwivedi
- Division of Biostatistics and Epidemiology, Department of Biomedical Sciences, Texas Tech University Health Science Center, El Paso, TX, USA
| | - Erica Washburn
- Division of Nuclear Medicine, Department of Radiology, University of Cincinnati Medical Center, Cincinnati, OH, USA
| | - Naseer Khan
- Division of Cardiology, Department of Internal Medicine, University of Cincinnati Medical Center, 231 Albert Sabin Way, Cincinnati, OH, 45267-0542, USA
| | - Mahyar Khaleghi
- Division of Cardiology, Department of Internal Medicine, University of Cincinnati Medical Center, 231 Albert Sabin Way, Cincinnati, OH, 45267-0542, USA
| | - Nischelle Kalakota
- University of Cincinnati College of Medicine, University of Cincinnati, Cincinnati, OH, USA
| | - Myron C Gerson
- Division of Cardiology, Department of Internal Medicine, University of Cincinnati Medical Center, 231 Albert Sabin Way, Cincinnati, OH, 45267-0542, USA.
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Slomka PJ, Berman DS, Germano G. Normal limits for transient ischemic dilation with 99mTc myocardial perfusion SPECT protocols. J Nucl Cardiol 2017; 24:1709-1711. [PMID: 27351437 DOI: 10.1007/s12350-016-0582-4] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2016] [Accepted: 06/11/2016] [Indexed: 11/25/2022]
Affiliation(s)
- Piotr J Slomka
- Department of Medicine, Cedars-Sinai Medical Center, Los Angeles, CA, USA.
- David Geffen School of Medicine, UCLA, Los Angeles, CA, USA.
| | - Daniel S Berman
- Departments of Imaging and Medicine, Cedars-Sinai Medical Center, Los Angeles, CA, USA
| | - Guido Germano
- Department of Medicine, Cedars-Sinai Medical Center, Los Angeles, CA, USA
- David Geffen School of Medicine, UCLA, Los Angeles, CA, USA
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Abstract
PURPOSE OF REVIEW Patients with end-stage renal disease (ESRD) have an increased risk of cardiovascular morbidity and mortality. Cardiac risk assessment, though challenging, is critical in these high-risk patients, particularly in the pre-transplant population. In this review, we discuss the burden of coronary artery disease in the ESRD population and review the literature on the diagnostic and prognostic performance, clinical value, and future directions of single-photon emission computed tomography (SPECT) myocardial perfusion imaging (MPI) in ESRD patients. RECENT FINDINGS Stress myocardial perfusion imaging provides incremental prognostic value to clinical data. The AHA/ACCF consensus statement on the cardiac assessment of kidney transplant candidates provides some guidance on the selection of asymptomatic patients for further non-invasive risk stratification. Additionally, the novel selective A2A receptor agonist vasodilator stress agent, regadenoson, is safe and effective in ESRD and has recently been approved by the Food and Drug Administration for use in this population. Ancillary stress MPI findings, namely heart rate response to vasodilator stress, can provide incremental risk stratification. SUMMARY While myocardial perfusion imaging is widely used as a risk assessment tool, its utilization and clinical implications in the ESRD population are controversial. Though stress SPECT-MPI has imperfect diagnostic accuracy in this specific patient population, it is still a valuable non-invasive modality in cardiovascular risk assessment.
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Doukky R, Fughhi I, Campagnoli T, Wassouf M, Ali A. The prognostic value of regadenoson SPECT myocardial perfusion imaging in patients with end-stage renal disease. J Nucl Cardiol 2017; 24:112-118. [PMID: 26582040 DOI: 10.1007/s12350-015-0303-4] [Citation(s) in RCA: 42] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2015] [Revised: 10/01/2015] [Indexed: 02/07/2023]
Abstract
BACKGROUND The prognostic value of regadenoson SPECT myocardial perfusion imaging (MPI) has not been specifically studied in patients with end-stage renal disease (ESRD). METHODS AND RESULTS We prospectively followed ESRD patients enrolled in the ASSUAGE and ASSUAGE-CKD trials in which they received regadenoson-stress 99mTc-tetrofosmin SPECT-MPI. Images were semiquantitatively analyzed by an investigator blinded to clinical and outcome data. Patients were followed for cardiac death, myocardial infarction (MI), and coronary revascularization (CR). Revascularizations occurring >90 days post-MPI were considered "late" events. Survival analysis was performed using Cox regression models, adjusting for age, gender, diabetes, dyslipidemia, smoking, and known coronary artery disease. We analyzed 303 patients (mean age 54 years; 64% men), who were followed for 35 ± 10 months. Adjusting for clinical covariates, abnormal regadenoson-stress MPI (SSS ≥ 4) was associated with increased risk of the composite of cardiac death or MI (23.9% vs 14.4%; HR 1.88; CI 1.04-3.41; P = .037) and the composite of cardiac death, MI, or late CR (27.3% vs 16.7%; HR 1.80; CI 1.03-3.14; P = .039). Adjusting for clinical covariates, regadenoson-induced myocardial ischemia (SDS ≥ 2) was associated with increased rate of the composite endpoint of cardiac death, MI, or CR (33.3% vs 16.9%; HR 1.97; CI 1.19-3.27; P = .008). CONCLUSION Regadenoson-stress SPECT-MPI provides a significant prognostic value in patients with ESRD. ESRD patients with normal SPECT-MPI have relatively high adverse event rates.
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Affiliation(s)
- Rami Doukky
- Division of Cardiology, John H. Stroger, Jr. Hospital of Cook County, 1901 W. Harrison St., Suite # 3620, Chicago, IL, 60612, USA.
- Division of Cardiology, Rush University Medical Center, Chicago, IL, USA.
| | - Ibtihaj Fughhi
- Division of Cardiology, Rush University Medical Center, Chicago, IL, USA
| | - Tania Campagnoli
- Division of Cardiology, Rush University Medical Center, Chicago, IL, USA
| | - Marwan Wassouf
- Division of Cardiology, Rush University Medical Center, Chicago, IL, USA
| | - Amjad Ali
- Department of Radiology and Nuclear Medicine, Rush University Medical Center, Chicago, IL, USA
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Lester D, El-Hajj S, Farag AA, Bhambhvani P, Tauxe L, Heo J, Iskandrian AE, Hage FG. Prognostic value of transient ischemic dilation with regadenoson myocardial perfusion imaging. J Nucl Cardiol 2016; 23:1147-1155. [PMID: 26490267 DOI: 10.1007/s12350-015-0272-7] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2015] [Accepted: 08/08/2015] [Indexed: 11/28/2022]
Abstract
BACKGROUND Transient ischemic dilation (TID) of the left ventricle seen on myocardial perfusion imaging (MPI) is sometimes used as a marker of severe coronary artery disease. The prognostic value of TID obtained using regadenoson, a selective adenosine A2A receptor agonist, as a stress agent for MPI has not been studied. METHODS TID ratio was measured using an automated software program on consecutive patients with normal and abnormal perfusion pattern on regadenoson MPI at a single institution. An abnormal TID was defined as greater than 1.33. The primary outcome was a composite of cardiac death, non-fatal myocardial infarction (MI), and late coronary revascularization (CR, >90 days after MPI). RESULTS The study population consisted of 887 patients (62 ± 12 years, 66% male, 48% diabetes, 46% prior CR, 75% with abnormal perfusion pattern, left ventricular ejection fraction-LVEF 55 ± 6%). An abnormal TID was present in 51 (6%) patients. Baseline characteristics were not different based on the presence or absence of TID. Early CR (≤90 days) was performed in 11 (22%) patients with vs 92 (11%) patients without TID (P = .04). During a mean follow-up of 29 ± 19 months, the primary outcome occurred in 271 (31%) patients (22% cardiac death, 6% MI, 9% late CR). TID was associated with increased risk of the primary outcome (log-rank P = .017), an association largely driven by late CR. In a Cox proportional model adjusted for multiple variables including perfusion defect size (PDS) and LVEF, the hazard ratio for TID was 1.92 (95% CI 1.20-3.08, P = .007). In the subset of patients with normal perfusion pattern, there was no association between TID and outcomes. CONCLUSIONS TID on regadenoson MPI carries important prognostic information that is independent from PDS and LVEF, but this association is restricted to patients with abnormal perfusion on imaging.
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Affiliation(s)
- Davis Lester
- University of Alabama at Birmingham School of Medicine, Birmingham, AL, USA
| | - Stephanie El-Hajj
- Division of Cardiovascular Disease, University of Alabama at Birmingham, Lyons Harrison Research Building 306, 1720 2nd AVE S, Birmingham, AL, 35294-0007, USA
| | - Ayman A Farag
- Division of Cardiovascular Disease, University of Alabama at Birmingham, Lyons Harrison Research Building 306, 1720 2nd AVE S, Birmingham, AL, 35294-0007, USA
| | - Pradeep Bhambhvani
- Division of Molecular Imaging and Therapeutics, University of Alabama at Birmingham, Birmingham, AL, USA
| | - Lindsey Tauxe
- Division of Cardiovascular Disease, University of Alabama at Birmingham, Lyons Harrison Research Building 306, 1720 2nd AVE S, Birmingham, AL, 35294-0007, USA
| | - Jaekyeong Heo
- Division of Cardiovascular Disease, University of Alabama at Birmingham, Lyons Harrison Research Building 306, 1720 2nd AVE S, Birmingham, AL, 35294-0007, USA
| | - Ami E Iskandrian
- Division of Cardiovascular Disease, University of Alabama at Birmingham, Lyons Harrison Research Building 306, 1720 2nd AVE S, Birmingham, AL, 35294-0007, USA
| | - Fadi G Hage
- Division of Cardiovascular Disease, University of Alabama at Birmingham, Lyons Harrison Research Building 306, 1720 2nd AVE S, Birmingham, AL, 35294-0007, USA.
- Section of Cardiology, Birmingham Veterans Affairs Medical Center, Birmingham, AL, USA.
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Löffler AI, Bourque JM. Prognostic impact of TID in regadenoson MPI: Some patients and certain events. J Nucl Cardiol 2016; 23:1156-1159. [PMID: 26490266 PMCID: PMC5485414 DOI: 10.1007/s12350-015-0299-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2015] [Accepted: 09/23/2015] [Indexed: 10/22/2022]
Affiliation(s)
- Adrián I Löffler
- Cardiovascular Division and the Cardiac Imaging Center, Department of Medicine, University of Virginia Health System, Box 800158, 1215 Lee Street, Charlottesville, VA, 22908, USA.
| | - Jamieson M Bourque
- Cardiovascular Division and the Cardiac Imaging Center, Department of Medicine, University of Virginia Health System, Box 800158, 1215 Lee Street, Charlottesville, VA, 22908, USA
- Department of Radiology, University of Virginia Health System, Charlottesville, VA, USA
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Doukky R, Hayes K, Frogge N. Appropriate use criteria for SPECT myocardial perfusion imaging: Are they appropriate for women? J Nucl Cardiol 2016; 23:695-705. [PMID: 26304956 DOI: 10.1007/s12350-015-0233-1] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2015] [Accepted: 06/26/2015] [Indexed: 01/30/2023]
Abstract
BACKGROUND Several studies have reported that women are more likely to receive inappropriate SPECT myocardial perfusion imaging (MPI), suggesting gender disparity in AUC determination. We investigated the impact of gender on the diagnostic and prognostic utility of AUC. METHODS AND RESULTS We analyzed a multi-site prospective cohort of 1511 consecutive patients (43.5% women) who underwent outpatient, community-based SPECT-MPI. Subjects were stratified into gender groups and appropriateness subgroups, and followed for 27 ± 10 months for cardiac death, myocardial infarction, and coronary revascularization. Women were more likely to receive inappropriate MPI (60.7% vs 33.8%, P < .001). Irrespective of appropriateness, women were less likely to have an abnormal MPI (6.1% vs 14.9%, P < .001), even after adjusting for clinical covariates [odds ratio = 0.40 (95% confidence interval = 0.26-0.60), P < .001]. Irrespective of appropriateness, women were at lower risk for MACE (composite of cardiac death, myocardial infarction, or coronary revascularization) after adjusting for clinical and imaging covariates [hazard ratio = 0.49 (95% confidence interval = 0.28-0.86), P = .01]. There was no interaction between gender and appropriateness group as a determinant of abnormal MPI or MACE (interaction P values ≥ .26), indicating that female gender was associated with similar relative risk of an abnormal MPI and MACE irrespective of appropriateness group. Abnormal MPI was similarly predictive of increased hazard of MACE in both genders, regardless of appropriateness (interaction P values ≥ .46). CONCLUSION In this multi-site cohort, there was no demonstrable gender-based differential impact of AUC on the diagnostic or prognostic utility of SPECT-MPI. The study validates the methods used in determining risk in the AUC algorithm and endorses the widespread application of AUC in men and women.
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Affiliation(s)
- Rami Doukky
- Division of Cardiology, John H. Stroger, Jr. Hospital of Cook County, 1901 W. Harrison St, Suite 3620, Chicago, 60612, IL, USA.
- Division of Cardiology, Rush University Medical Center, Chicago, IL, USA.
| | - Kathleen Hayes
- Division of Cardiology, Rush University Medical Center, Chicago, IL, USA
| | - Nathan Frogge
- Division of Cardiology, Rush University Medical Center, Chicago, IL, USA
- Department of Medicine, University of Chicago Medical Center, Chicago, IL, USA
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Hämäläinen H, Hedman M, Laitinen T, Hedman A, Kivelä A, Laitinen T. Reference values for left ventricular systolic synchrony according to phase analysis of ECG-gated myocardial perfusion SPECT. Clin Physiol Funct Imaging 2016; 38:38-45. [PMID: 27453042 DOI: 10.1111/cpf.12379] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2015] [Accepted: 05/13/2016] [Indexed: 11/27/2022]
Abstract
BACKGROUND The aim of this study was to define reference values for left ventricular systolic synchrony and for the volume parameters of the left ventricle using myocardial perfusion SPECT-derived phase analysis method. METHODS We evaluated data of 433 patients who underwent myocardial perfusion SPECT/CT during January 2012-February 2013 in Kuopio University Hospital. The final study population consisted of 52 patients (aged 42-84 years) who met the criteria: (1) no previously diagnosed cardiac disease, (2) normal ECG at rest, (3) no advanced coronary artery disease in CT and 4) normal myocardial perfusion in stress/rest myocardial perfusion SPECT/CT. The severity of mechanical dyssynchrony was assessed by phase analysis of gated myocardial SPECT at stress stage after pharmacological exercise and at rest using Quantitative Gated SPECT (QGS) software. Volume parameters of the left ventricle were also assessed. RESULTS The phase histogram bandwidth at rest was 28.0 [63.7] degrees (median [95th percentile]). The standard deviation of phase histogram at rest was 7.8 [26.5] degrees. Entropy at the rest study was 54.0 [63.7] %. All left ventricular dyssynchrony parameters were statistically significantly higher at stress compared to rest. There were no statistically significant differences in dyssynchrony values between men and women. In volume parameters, reference values in male were expectedly higher than in female. Cardiac output did not differ significantly between genders. CONCLUSION In subjects without signs of cardiac diseases, the left ventricular systolic function is well synchronized. Phase analysis measurement does not depend on gender, age, BMI or blood pressure, but the values of dyssynchrony parameters increase during pharmacological stress.
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Affiliation(s)
- Hanna Hämäläinen
- Department of Clinical Physiology and Nuclear Medicine, Kuopio University Hospital and University of Eastern Finland, Kuopio, Finland
| | - Marja Hedman
- Department of Clinical Physiology and Nuclear Medicine, Kuopio University Hospital and University of Eastern Finland, Kuopio, Finland
| | - Tiina Laitinen
- Department of Clinical Physiology and Nuclear Medicine, Kuopio University Hospital and University of Eastern Finland, Kuopio, Finland
| | - Antti Hedman
- Heart Center, Kuopio University Hospital, Kuopio, Finland
| | - Antti Kivelä
- Heart Center, Kuopio University Hospital, Kuopio, Finland
| | - Tomi Laitinen
- Department of Clinical Physiology and Nuclear Medicine, Kuopio University Hospital and University of Eastern Finland, Kuopio, Finland
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AlJaroudi W, Campagnoli T, Fughhi I, Wassouf M, Ali A, Doukky R. Prognostic value of heart rate response during regadenoson stress myocardial perfusion imaging in patients with end stage renal disease. J Nucl Cardiol 2016; 23:560-9. [PMID: 26293358 DOI: 10.1007/s12350-015-0234-0] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2015] [Revised: 06/29/2015] [Indexed: 11/24/2022]
Abstract
BACKGROUND Blunted heart rate response (HRR) to vasodilator stress agents is associated with worse outcomes. There are limited data assessing the effect of impaired HRR to regadenoson among patients with end-stage renal disease (ESRD) undergoing stress myocardial perfusion imaging (MPI). METHODS We prospectively followed patients with ESRD enrolled in the ASSUAGE and ASSUAGE-CKD trials. HRR was defined as 100*(peak stress heart rate-resting heart rate)/resting heart rate. Study cohort was dichotomized to blunted and normal HRR groups according to an established median HRR value <28% or ≥28%, which were propensity-score matched based on 22 clinical and imaging covariates. The Primary endpoint was all-cause death. The secondary cardiac-specific endpoints included: (1) the composite endpoint of cardiac death or myocardial infarction; (2) the composite endpoint of cardiac death, myocardial infarction, or late (>90 days) coronary revascularization. RESULTS There were 303 patients followed for 35 ± 10 months. In the entire cohort, there was a stepwise increase in the rates of death and all secondary endpoints with worsening HRR (P values ≤.001). Blunted HRR (<28%) was associated with increased risk of death (unadjusted hazard ratio 4.10 [1.98-8.46], P < .001) and all secondary endpoints (P ≤ .001). After multivariate adjustment, HRR remained an independent predictor of mortality and secondary endpoints whether used as continuous or dichotomous variable, and added incremental prognostic value for all-cause death (P = .046). Blunted HRR was associated with increased event rate among patients with normal myocardial perfusion (P = .001) and abnormal perfusion (P = .053). In the propensity-matched cohort of 132 patients (66 in each group), blunted HRR was associated with significant increase in all-cause death (21% vs. 5%, HR 5.09 [1.46-17.7], P=.011), and similarly for the secondary endpoints. CONCLUSION Blunted HRR (<28%) to regadenoson is a strong and independent predictor of death and cardiovascular events in patients with ESRD and adds incremental prognostic value.
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Affiliation(s)
- Wael AlJaroudi
- Division of Cardiovascular Medicine, Clemenceau Medical Center, Beirut, Lebanon
| | - Tania Campagnoli
- Division of Cardiology, Rush University Medical Center, Chicago, IL, USA
| | - Ibtihaj Fughhi
- Division of Cardiology, Rush University Medical Center, Chicago, IL, USA
| | - Marwan Wassouf
- Division of Cardiology, Rush University Medical Center, Chicago, IL, USA
| | - Amjad Ali
- Department of Radiology and Nuclear Medicine, Rush University Medical Center, Chicago, IL, USA
| | - Rami Doukky
- Division of Cardiology, Rush University Medical Center, Chicago, IL, USA.
- Division of Cardiology, John H. Stroger Jr. Hospital of Cook County, 1901 W. Harrison St., Suite # 3620, 60612, Chicago, IL, USA.
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Doukky R, Frogge N, Appis A, Hayes K, Khoudary G, Fogg L, Williams KA. Impact of Appropriate Use on the Estimated Radiation Risk to Men and Women Undergoing Radionuclide Myocardial Perfusion Imaging. J Nucl Med 2016; 57:1251-7. [PMID: 27103019 DOI: 10.2967/jnumed.115.167205] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2015] [Accepted: 03/14/2016] [Indexed: 11/16/2022] Open
Abstract
UNLABELLED The impact of appropriate use criteria (AUC) for myocardial perfusion imaging (MPI) with SPECT on the estimated lifetime attributable risk (LAR) of cancer is unknown. METHODS A cohort of 1,511 consecutive patients who underwent clinically indicated (99m)Tc-setamibi MPI were categorized into appropriate/uncertain (n = 823) versus inappropriate (n = 688) use groups according to the 2009 AUC and were prospectively followed for 27 ± 10 mo. Logistic regression models were used to determine the annualized probability of major adverse cardiac events (MACE) of cardiac death or myocardial infarction and the probability of revascularization within 6 mo of MPI, accounting for relevant covariates. We determined LAR for each subject on the basis of accepted risk estimates. We calculated MPI's benefit-to-risk ratios, defined by the annualized predicted MACE-to-LAR ratio and the predicted 6-mo-revascularization-to-LAR ratio. RESULTS During follow-up, there were 22 MACE and 29 6-mo revascularizations. The administered radioactivity and effective radiation doses absorbed were similar between the study groups. Patients with inappropriate MPI had significantly higher LAR (median, 0.08% vs. 0.06%, P < 0.001), lower predicted MACE-to-LAR ratio (median, 1.5 vs. 4.3, P < 0.001), and lower predicted 6-mo-revascularization-to-LAR ratio (median, 5.4 vs. 15.5, P < 0.001). Women had higher LAR (median, 0.08% vs. 0.07%, P < 0.001) and lower predicted MACE-to-LAR ratio (median, 1.9 vs. 3.3, P < 0.001) and 6-mo-revascularization-to-LAR ratio (median, 4.4 vs. 17.5, P < 0.001). However, appropriate/uncertain use negated the difference between men and women in LAR (P = 0.94) and the predicted MACE-to-LAR ratio (P = 0.97). CONCLUSION Inappropriate MPI use is associated with excess cancer risk and lower MPI's benefit-to-risk ratio. Appropriate/uncertain use neutralizes the sex gap in LAR with MPI.
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Affiliation(s)
- Rami Doukky
- Division of Cardiology, John H. Stroger, Jr. Hospital of Cook County, Chicago, Illinois Division of Cardiology, Rush University Medical Center, Chicago, Illinois
| | - Nathan Frogge
- Division of Cardiology, Rush University Medical Center, Chicago, Illinois Department of Internal Medicine, University of Chicago Medicine, Chicago, Illinois; and
| | - Andrew Appis
- Division of Cardiology, Rush University Medical Center, Chicago, Illinois
| | - Kathleen Hayes
- Division of Cardiology, Rush University Medical Center, Chicago, Illinois
| | - George Khoudary
- Division of Cardiology, Rush University Medical Center, Chicago, Illinois
| | - Louis Fogg
- College of Nursing, Rush University, Chicago, Illinois
| | - Kim A Williams
- Division of Cardiology, Rush University Medical Center, Chicago, Illinois
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Chiuzan C, West EA, Duong J, Cheung KYK, Einstein AJ. Sample size considerations for clinical research studies in nuclear cardiology. J Nucl Cardiol 2015; 22:1300-13. [PMID: 26403142 DOI: 10.1007/s12350-015-0256-7] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2015] [Revised: 07/24/2015] [Indexed: 11/27/2022]
Abstract
Sample size calculation is an important element of research design that investigators need to consider in the planning stage of the study. Funding agencies and research review panels request a power analysis, for example, to determine the minimum number of subjects needed for an experiment to be informative. Calculating the right sample size is crucial to gaining accurate information and ensures that research resources are used efficiently and ethically. The simple question "How many subjects do I need?" does not always have a simple answer. Before calculating the sample size requirements, a researcher must address several aspects, such as purpose of the research (descriptive or comparative), type of samples (one or more groups), and data being collected (continuous or categorical). In this article, we describe some of the most frequent methods for calculating the sample size with examples from nuclear cardiology research, including for t tests, analysis of variance (ANOVA), non-parametric tests, correlation, Chi-squared tests, and survival analysis. For the ease of implementation, several examples are also illustrated via user-friendly free statistical software.
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Affiliation(s)
- Cody Chiuzan
- Department of Biostatistics, Mailman School of Public Health, Columbia University, New York, NY, USA.
| | - Erin A West
- Department of Biostatistics, Mailman School of Public Health, Columbia University, New York, NY, USA
| | - Jimmy Duong
- Department of Biostatistics, Mailman School of Public Health, Columbia University, New York, NY, USA
| | - Ken Y K Cheung
- Department of Biostatistics, Mailman School of Public Health, Columbia University, New York, NY, USA
| | - Andrew J Einstein
- Division of Cardiology, Departments of Medicine and Radiology, Columbia University Medical Center and New York-Presbyterian Hospital, New York, 10032, USA
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Effective risk stratification of patients on the basis of myocardial perfusion SPECT is dependent on appropriate patient selection. Curr Cardiol Rep 2015; 17:549. [PMID: 25418932 DOI: 10.1007/s11886-014-0549-5] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Abstract
Myocardial perfusion imaging (MPI) with single-photon emission computed tomography (SPECT) is commonly used in risk assessment, as an abnormal scan predicts a multifold increase in cardiac risk. Recent studies have showed that application of the appropriate use criteria (AUC) sharpens the prognostic value of SPECT-MPI, while inappropriate use is clinically ineffective and may lead to unnecessary downstream invasive testing and revascularization procedures. In this review, we will discuss recent literature examining the impact of appropriate use on the prognostic value of SPECT-MPI and downstream decision-making. We will also discuss the implications of appropriate use on cost-effectiveness of MPI.
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Doukky R, Olusanya A, Vashistha R, Saini A, Fughhi I, Mansour K, Nigatu A, Confer K, Sims SA. Diagnostic and prognostic significance of ischemic electrocardiographic changes with regadenoson-stress myocardial perfusion imaging. J Nucl Cardiol 2015; 22:700-13. [PMID: 25907352 DOI: 10.1007/s12350-014-0047-6] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2014] [Accepted: 12/04/2014] [Indexed: 11/29/2022]
Abstract
BACKGROUND The diagnostic and prognostic value of regadenoson-induced ST-segment depression (ST↓) is not defined. Due to the low incidence of ST↓ ≥1.0 mm with vasodilator stress, a lower threshold to define ischemic ECG response may provide improved clinical utility. METHODS We conducted a retrospective cohort study of patients who underwent regadenoson-stress SPECT myocardial perfusion imaging (MPI) followed by coronary angiography within 6 months. Ischemic ST↓ was defined as ≥0.5 mm. The prevalence of angiographically severe coronary artery disease (CAD) and the rates of major adverse cardiac events (MACE) including cardiac death, myocardial infarction, and coronary revascularization were determined. RESULTS In a diagnostic cohort of 629 subjects, 117 (18.6%) had ST↓ ≥0.5 mm. Severe CAD was more prevalent in the ST↓ ≥0.5 vs ST <0.5 group (13.7% vs 5.3%, P = .001). Among patients with normal MPI (n = 229), the prevalence of severe CAD was higher in the ST↓ ≥0.5 group (8.2% vs 2.2%, P = .04). Adjusting for clinical and imaging covariates, ST↓ ≥0.5 mm was independently predictive of severe CAD [odds ratio = 3.37, 95% confidence interval (CI) = 1.67-6.83, P = .001], and provided incremental diagnostic value (Chi square increment = 10.3, P = .001). In an outcome cohort of 748 subjects, after adjusting for clinical and imaging covariates, ST↓ ≥0.5 mm was associated with increased MACE rate in the entire cohort [hazard ratio = 1.41, CI 1.01-1.96, P = .04] and in the subgroup of patients with normal MPI [hazard ratio = 2.2, CI 1.11-4.39, P = .02], and provided incremental prognostic value (Chi square increment = 3.9, P = .049). A diagnostic ST↓ threshold of 0.5 mm provided greater discriminatory capacity than a 1.0 mm cutoff (P = .03). CONCLUSIONS Among patients selected to undergo coronary angiography, regadenoson-induced ST↓ ≥0.5 mm was associated with higher rates of severe CAD and MACE, irrespective of MPI finding.
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Affiliation(s)
- Rami Doukky
- Division of Cardiology, John H. Stroger, Jr. Hospital of Cook County, 1901 W. Harrison St. Suite 3620, Chicago, IL, 60612, USA,
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Golzar Y, Olusanya A, Pe N, Dua SG, Golzar J, Gidea C, Doukky R. The significance of automatically measured transient ischemic dilation in identifying severe and extensive coronary artery disease in regadenoson, single-isotope technetium-99m myocardial perfusion SPECT. J Nucl Cardiol 2015; 22:526-34. [PMID: 25824022 DOI: 10.1007/s12350-015-0087-6] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2014] [Accepted: 02/02/2015] [Indexed: 10/23/2022]
Abstract
BACKGROUND The critical threshold and clinical significance of transient ischemic dilation (TID) for regadenoson, single-isotope (99m)Tc SPECT myocardial perfusion imaging (MPI) are not defined. METHODS From 100 patients with low likelihood of CAD, we derived the abnormal TID threshold (mean + 2 SD). We validated the threshold in a cohort of 547 patients who received one-day, rest/regadenoson-stress, (99m)Tc-tetrofosmin SPECT-MPI followed by coronary angiography within 6 months. Patients were classified into three CAD severity strata: no significant CAD, mild to moderate CAD, and severe and extensive CAD. RESULTS The abnormal TID threshold was determined to be 1.31. Though mean TID ratios were different between the three CAD severity groups and the derivation cohort (P < .001), there was no difference in the mean TID ratios between the categories of CAD severity or in the prevalence of severe CAD between TID+ and TID- groups (P = .74). By ROC analysis, TID had a poor discriminatory capacity in identifying severe and extensive CAD [AUC of 0.55 (95% CI 0.47-0.62, P = .25)]. Stepwise multivariate logistic analysis demonstrated that adding TID to clinical and perfusion data did not provide incremental diagnostic value (P = .87). CONCLUSIONS The clinical utility of TID with regadenoson-stress MPI in this era of declining CAD burden is questionable.
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Affiliation(s)
- Yasmeen Golzar
- Division of Cardiology, John H. Stroger, Jr. Hospital of Cook County, Chicago, IL, USA
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Bourque JM. Contemporary relevance of TID: Based on the company it keeps. J Nucl Cardiol 2015; 22:535-8. [PMID: 25832984 PMCID: PMC5485415 DOI: 10.1007/s12350-015-0122-7] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2015] [Accepted: 03/11/2015] [Indexed: 11/29/2022]
Affiliation(s)
- Jamieson M Bourque
- Cardiovascular Division and the Cardiovascular Imaging Center, Department of Medicine, University of Virginia Health System, Box 800158, 1215 Lee Street, Charlottesville, VA, 22908, USA,
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Prognostic and Diagnostic Implications of Nonperfusion Data on SPECT Myocardial Perfusion Imaging. CURRENT CARDIOVASCULAR IMAGING REPORTS 2015. [DOI: 10.1007/s12410-014-9307-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Gowd BMP, Heller GV, Parker MW. Stress-only SPECT myocardial perfusion imaging: a review. J Nucl Cardiol 2014; 21:1200-12. [PMID: 25005348 DOI: 10.1007/s12350-014-9944-y] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2014] [Accepted: 06/10/2014] [Indexed: 11/26/2022]
Abstract
Myocardial perfusion imaging (MPI) has enjoyed considerable success for decades due to its diagnostic accuracy and wealth of prognostic data. Despite this success several limitations such as lengthy protocols and radiation exposure remain. Advancements to address these shortcomings include abbreviated stress-only MPI (SO MPI) protocols, PET and both hardware and software methods to reduce radiation exposure and time. SO MPI has advantages in protocol time and radiation reduction with a wealth of supporting data in terms of diagnostic validity and prognostic value. Newer technologies such as attenuation correction, and advanced camera technologies have enabled SO MPI to be more efficient in reducing the time of acquisition and radiation dose and improving accuracy. This review examines the literature available, regarding accuracy, patient outcomes, implementation strategies, and newer developments associated with SO MPI.
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Affiliation(s)
- B M Pampana Gowd
- Henry Low Heart Center, Hartford Hospital, 80 Seymour Street, Hartford, CT, 06102, USA,
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