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  • 1
    In: European Heart Journal, Oxford University Press (OUP), Vol. 43, No. Supplement_2 ( 2022-10-03)
    Abstract: Transthyretin (ATTR) cardiac amyloidosis (CA) is an underdiagnosed form of restrictive cardiomyopathy leading to a rapid progression into heart failure. 99mTc-labeled radiotracer cardiac scintigraphy is crucial for the evaluation of CA. Semiquantitative (Perugini visual grade) and quantitative (heart-to-contralateral lung ratio, H/CL) parameters are used to assessing CA via cardiac scintigraphy. Purpose We aimed to assess the comparative prognostic utility of the Perugini visual grade and heart to contralateral lung ratio. Methods The study population was identified based on an institutional registry of consecutive patients undergoing 99mTc-PYP radiotracer cardiac scintigraphy for suspected CA between January 2020-October 2021. The H/CL is calculated by the fraction of heart region of interest (ROI) mean uptake counts to the contralateral chest ROI. The visual scoring system compares uptake between bone (rib) and heart where 0 = absent cardiac uptake, 1 = uptake less than bone, 2 = uptake equal to bone, and 3 = is uptake greater than bone. Ejection fraction (EF) was obtained from echocardiographic studies done around the time of cardiac scintigraphy. MACE was defined as a composite of inclusive of all-cause death, myocardial infarction, admission for heart failure and late revascularization – percutaneous coronary intervention (PCI) or coronary artery bypass graft (CABG) & gt;90 days after imaging. Results A total of 330 patients (mean age 70.9±12.2 years, 62.2% male) were included in the analysis. Risk factors were prevalent (59.7% hypertension, Heart Failure 68.3%, 26.5% dyslipidemia, 26.2% diabetes) (Table 1). In total, 32.6% of the cohort had studies suggestive of ATTR CA. Median time between echocardiography and cardiac scintigraphy was 7 days (IQR 5–42 days). A higher frequency of MACE was reported in patients with a 2+ visual grade (30% vs 42%, p=0.03). A H/CL & gt;1.5 was associated with borderline significance (43% vs 35% p=0.07). Conclusion Our analysis showed that the Perugini visual grading of transthyretin cardiac amyloidosis conferred the best prognostic utility contrary to heart to contralateral lung ratio in 99mTc-PYP radiotracer cardiac scintigraphy. Funding Acknowledgement Type of funding sources: None.
    Type of Medium: Online Resource
    ISSN: 0195-668X , 1522-9645
    Language: English
    Publisher: Oxford University Press (OUP)
    Publication Date: 2022
    detail.hit.zdb_id: 2001908-7
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  • 2
    In: European Heart Journal, Oxford University Press (OUP), Vol. 41, No. Supplement_2 ( 2020-11-01)
    Abstract: There is scarcity of studies from the Middle East had address the use of guideline-recommended secondary cardiovascular prevention medications among individuals who survived at least one decade after coronary revascularization (CR) by percutaneous coronary intervention (PCI) or coronary bypass graft surgery (CABG). Purpose An objective of the DECADE-PLUS study was to evaluate the use of antiplatelet agents (APA), statins, beta blockers (BB) and renin-angiotensin system inhibitors (RASI) in such patients. Methods We enrolled consecutive patients seen at ambulatory or in-patient settings with the following inclusion criteria: patient had PCI or CABG & gt;10 years ago, age & gt;18 years at the time of the index CR, and availability of data of currently used medications. Results Of 892 patients enrolled, 600 (67.3%) had PCI and 292 (32.7%) had CABG. Patients had CR & gt;20 years ago (100; 11.2%), 11–19 years ago (536; 60.1%) or 10 years ago (256; 28.7%). Women comprised 13.8% of the whole cohort, and mean age at index CR was 53.4+9.4 years. Hypertension, diabetes mellitus, and dyslipidemia were present in 398 (44.6%), 351 (39.3%) and 290 (32.5%), respectively at the time of CR. Overall, aspirin was used in 745 (83.5%), and a second APA in 329 (36.9%). Statins, BB and RASI were used in 83.7%, 71.7% and 54.3%, respectively. Univariate analysis of predictors of lower rates of use of these medications showed that survival time (10 years vs. & gt;20 years), and revascularization type (PCI vs. CABG) had no impact on use of these medications. However, nondiabetics were less often prescribed second APA (odds ratio (OR) 0.78, p=0.005) and RASI (OR 0.85, p=0.007) compared with diabetics. Furthermore, compared with men, women were less often prescribed aspirin (OR 0.66, p & lt;0.0001), statin (OR 0.67, p & lt;0.0001), BB (OR 0.71, p=0.005), and RASI (OR 0.79, p=0.005). Conclusion Middle East patients surviving at least one decade after coronary revascularization have a high rate of utilization of secondary cardiovascular medications compared with western data. However, women and non-diabetic individuals have lower rate of use of these medications compared with diabetics and men, respectively. Larger studies are warranted to explore the reasons behind these discrepancies and thus represent potential targets for positive intervention. Funding Acknowledgement Type of funding source: None
    Type of Medium: Online Resource
    ISSN: 0195-668X , 1522-9645
    Language: English
    Publisher: Oxford University Press (OUP)
    Publication Date: 2020
    detail.hit.zdb_id: 2001908-7
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  • 3
    Online Resource
    Online Resource
    Oxford University Press (OUP) ; 2022
    In:  European Heart Journal Vol. 43, No. Supplement_2 ( 2022-10-03)
    In: European Heart Journal, Oxford University Press (OUP), Vol. 43, No. Supplement_2 ( 2022-10-03)
    Abstract: Positron emission tomography (PET) myocardial perfusion imaging (MPI) is an established test in the diagnosis and prognosis of patients with cardiac diseases. Silicon photomultiplier (SiPM) digital PET is the latest advancement in this technology with improved detector sensitivity, coincidence time resolution, and spatial resolution, allowing for Sub-milliSievert cardiac PET MPI. Purpose We aimed to assess the independent and incremental prognostic value of SiPM digital PET derived coronary flow reserve (CFR) to clinical and nuclear variables. Methods Consecutive patients who had clinically indicated digital Rubidium PET MPI were included. Rubidium dose was 10–20 mCi according to patient's weight. Patients were followed from the date of imaging to incident major adverse cardiovascular event (MACE: inclusive of all-cause death, myocardial infarction, admission for heart failure and late revascularization – percutaneous coronary intervention (PCI) or coronary artery bypass graft (CABG) & gt;90 days after imaging). Results The study population consisted of 2,893 patients with clinically indicated PET MPI (mean age 67 (±12), 53% male, 41% Caucasian). Cardiovascular risk factors were prevalent (88% hypertensive, 80% dyslipidemic, 47% diabetics, 18% ever smoking). After a mean follow-up of 8±7 months, 250 patients (8.6%, 10.7 per 1000 person-year) experienced MACE (90 D / 38 MI / 51 PCI / 11 CABG / 113 HF). In nested multivariable cox models, CFR was independently associated with incident MACE (HR 0.38, 95% CI 0.29–0.51, p & lt;0.001) and incrementally improved risk prediction (Harrell's C=0.77, p=0.002). Conclusion Our findings showed that a Sub-milliSievert SiPM digital PET-derived CFR provided incremental value in risk-stratifying patients and identifying those at increased risk of incident outcomes. Funding Acknowledgement Type of funding sources: None.
    Type of Medium: Online Resource
    ISSN: 0195-668X , 1522-9645
    Language: English
    Publisher: Oxford University Press (OUP)
    Publication Date: 2022
    detail.hit.zdb_id: 2001908-7
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  • 4
    Online Resource
    Online Resource
    Oxford University Press (OUP) ; 2022
    In:  European Heart Journal Vol. 43, No. Supplement_2 ( 2022-10-03)
    In: European Heart Journal, Oxford University Press (OUP), Vol. 43, No. Supplement_2 ( 2022-10-03)
    Abstract: Current cardiac PET and computed tomography imaging allows the simultaneous acquisition of anatomic and physiological data for patients suspected of CAD. Purpose We aimed to evaluate the incremental prognostic value of coronary artery calcium (CAC) score and coronary flow reserve (CFR) in patients with suspected coronary artery disease (CAD) undergoing positron emission tomography (PET) myocardial perfusion imaging (MPI). Methods We included consecutive patients who underwent PET MPI and CAC score calculation at Houston Methodist Hospital between August 2019 and January 2022. MPI and CAC scores were obtained in the same setting. The primary endpoint of the study was MACE. Cox proportional hazard regression was used to assess the incremental prognostic value of CAC and CFR by sequentially adding the variables to a model that included clinical and PET variables. Results A total of 2,072 patients (mean age 65.7±11.6 years, 54.7% women) were included in the analysis. Risk factors were prevalent (86.1% hypertension, 75.2% dyslipidemia, 45.5% diabetes). In total, 25.3% of the cohort had a CAC score of 0, 38.1% had CAC ≥400, and 39.9% had CFR & lt;2. Over a median follow up of 6.26 (IQR 1.7–12.4) months, 66 (3.2%) patients had cardiac death/nonfatal myocardial infarction. CFR score added incremental prognostic value over clinical and perfusion variables alone (base model: c-index 0.75; Akaike information criterion [AIC]: 1,860.6; p & lt;0.001; CFR model: c-index 0.78; AIC: 1,842.4; p=0.041). However, CAC score did not show an increased prognostic utility (CAC model: c-index 0.76; AIC: 1,854.8; p=0.087 vs. base model), and neither did the combined model of CAC and CFR scores (c-index 0.79; AIC: 1,839.4; p=0.366 vs. CFR model). Conclusions Among patients referred for PET MPI, CFR score added an increased prognostic value over clinical and MPI variables. However, when evaluating the prognostic utility of CAC alone, or of CAC and CFR combined, the multivariable model did not show any increased prognostic potential. Funding Acknowledgement Type of funding sources: None.
    Type of Medium: Online Resource
    ISSN: 0195-668X , 1522-9645
    Language: English
    Publisher: Oxford University Press (OUP)
    Publication Date: 2022
    detail.hit.zdb_id: 2001908-7
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  • 5
    Online Resource
    Online Resource
    Oxford University Press (OUP) ; 2022
    In:  European Heart Journal Vol. 43, No. Supplement_2 ( 2022-10-03)
    In: European Heart Journal, Oxford University Press (OUP), Vol. 43, No. Supplement_2 ( 2022-10-03)
    Abstract: Exercise capacity (EC) is an important prognostic test in patients with coronary artery disease (CAD). Positron-emission tomography (PET) is an important risk-stratifying tool to tailor management of patients with coronary artery disease. Purpose We aimed to assess EC in predicting positron emission tomography (PET) myocardial perfusion imaging (MPI) derived coronary flow reserve (CFR). Methods Consecutive patients who had clinically indicated PET MPI and EC were included. EC was defined based on peak metabolic equivalents (METS) achieved during exercise stress test. Myocardial blood flow (MBF) in ml/gm/min was obtained from dynamic PET MPI images at rest and peak hyperemia. The coronary flow reserve (CFR) was calculated as the ratio of stress to rest MBF of the left ventricle. Results The study population consisted of 511 patients who underwent PET MPI and EC testing (mean age 56 (±11), 71% male). Cardiovascular risk factors were prevalent (75% hypertensive, 82% dyslipidemic, 43% diabetics, 27% known CAD). Peak METS & gt;6 was achieved in 81% of patients, and the CFR & lt;2 was present in 27%. In multivariable logistic regression models adjusted for age, sex, cardiovascular risk factors (hypertension, diabetes, dyslipidemia) and medication use (angiotensin converting enzyme inhibitor/angiotensin receptor blocker, statins, beta-blockers), patients with peak METS & gt;6 had a statistically significant lower odds of microvascular dysfunction (CFR & lt;2: OR 0.43, 95% CI 0.26–0.71, p=0.001). Assessment of discrimination showed the model with CFR & lt;2 had an incremental improvement of Harrell's C statistic over clinical variables (0.65 vs 0.69, p=0.02). Conclusion Our findings showed exercise capacity was a good predictor of CFR and microvascular coronary health over and above clinical variables. Further studies are needed to assess the prognostic interplay between EC and CFR. Funding Acknowledgement Type of funding sources: None.
    Type of Medium: Online Resource
    ISSN: 0195-668X , 1522-9645
    Language: English
    Publisher: Oxford University Press (OUP)
    Publication Date: 2022
    detail.hit.zdb_id: 2001908-7
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  • 6
    Online Resource
    Online Resource
    Oxford University Press (OUP) ; 2022
    In:  European Heart Journal Vol. 43, No. Supplement_2 ( 2022-10-03)
    In: European Heart Journal, Oxford University Press (OUP), Vol. 43, No. Supplement_2 ( 2022-10-03)
    Abstract: Coronary artery calcium score (CACS) and exercise capacity (EC) are both independent prognostic tests in coronary artery disease (CAD). Purpose We aimed to assess the incremental prognostic role of EC to CACS, particularly in those with absent or low coronary calcification. Methods The cohort consisted of patients who had clinically indicated exercise stress testing and CACS assessment with a median of 27 days of each other. EC was defined based on peak metabolic equivalents (METS) achieved during exercise stress test. CACS was determined using the Agatston method. Patients were followed from the latest test date to incident MACE (inclusive of all-cause death, non-fatal myocardial infarction, late revascularization and admission for heart failure). Results There were a total of 1932 patients in the study population (mean age 56±12, 42% female, 48% hypertension, 21% diabetes, 48% dyslipidemia). Peak METS & lt;6 was achieved in 8% of patients, and the median (IQR) CACS was 9 (0–203). Patients with EC & lt;6 METS had doubling of their event rate across strata of CACS, even amongst patients with absent or low coronary calcifications (CACS 0: 4.6 vs 10.9; CACS 1–99: 10.4 vs 20.4; MACE per 1000 person year in patients with peak METS ≥ vs & lt;6 respectively) (Figure 1). Conclusion Our findings showed that poor exercise capacity was associated with higher risk even in patients with absent or low coronary calcification. Funding Acknowledgement Type of funding sources: None.
    Type of Medium: Online Resource
    ISSN: 0195-668X , 1522-9645
    Language: English
    Publisher: Oxford University Press (OUP)
    Publication Date: 2022
    detail.hit.zdb_id: 2001908-7
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  • 7
    Online Resource
    Online Resource
    Oxford University Press (OUP) ; 2022
    In:  European Heart Journal Vol. 43, No. Supplement_2 ( 2022-10-03)
    In: European Heart Journal, Oxford University Press (OUP), Vol. 43, No. Supplement_2 ( 2022-10-03)
    Abstract: Positron emission tomography (PET) myocardial perfusion imaging (MPI) derived coronary flow reserve (CFR) is an important risk-stratifying tool to tailor management of patients with coronary artery disease. Resting myocardial blood flow (MBF) is positively correlated to the product of resting heart rate and systolic blood product (resting pressure product – RPP), and can in turn lead to lower CFR in the setting of normal stress MBF. Purpose We aimed to assess the comparative incremental prognostic value of uncorrected to RPP-corrected CFR in predicting incident events. Methods Consecutive patients who had clinically indicated PET MPI were included. Patients were followed from the date of imaging to incident major adverse cardiovascular event (MACE: inclusive of all-cause death, myocardial infarction, admission for heart failure and late revascularization – percutaneous coronary intervention (PCI) or coronary artery bypass graft (CABG) & gt;90 days after imaging). Results The study population consisted of 2,893 patients with clinically indicated PET MPI (mean age 67 (±12), 53% male, 41% Caucasian). Cardiovascular risk factors were prevalent (88% hypertensive, 80% dyslipidemic, 47% diabetics, 18% ever smoking). After a mean follow-up of 8±7 months, 250 patients (8.6%, 10.7 per 1000 person-year) experienced MACE (90 D/38 MI/51 PCI/11 CABG/113 HF). Both uncorrected and corrected CFR were independently associated with incident MACE (HR 0.38, 95% CI 0.29–0.51, p & lt;0.001 and 0.61, 95% CI 0.50–0.76, p & lt;0.001 respectively). A comparison of model incremental prognostic value showed the model with uncorrected CFR had a statistically higher Harrell's C (0.76 vs 0.77, p=0.23). Conclusion Our findings showed that the prognostic value of CFR was preserved even in the setting of high resting blood pressure or heart rate. This suggests that correction for RPP should be selective. Funding Acknowledgement Type of funding sources: None.
    Type of Medium: Online Resource
    ISSN: 0195-668X , 1522-9645
    Language: English
    Publisher: Oxford University Press (OUP)
    Publication Date: 2022
    detail.hit.zdb_id: 2001908-7
    Library Location Call Number Volume/Issue/Year Availability
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