Faculty Bibliography

BACKGROUND:To date, there are no real-world studies comparing cangrelor to glycoprotein IIb/IIIa inhibitors (GPI) during percutaneous coronary intervention (PCI). Thus, we performed this study to evaluate the safety and effectiveness of cangrelor compared to GPI during PCI. METHODS:We identified patients who underwent PCI at our institution who received either cangrelor or GPI during PCI. Patients already on GPI or cangrelor prior to PCI or who received both cangrelor and GPI were excluded. Baseline demographics and clinical outcomes were extracted. Major bleeding is defined as a composite of major hematoma >4 cm, hematocrit drop >15, and gastrointestinal bleeding. RESULTS:A total of 2072 patients received adjunctive antiplatelet therapy during PCI (cangrelor [n=478]; GPI [n=1594]). Patients' mean age was 61±12 years. Most (66%) presented with acute coronary syndrome. Patients who received cangrelor were older and had a higher percentage of acute coronary syndrome and lower baseline hematocrit in comparison with patients who received GPI. Procedural success was achieved in 94% of patients, with no difference between groups. Major bleeding events (1.7% vs. 5.1%, P=.001), any vascular complication rates, and hospital length of stay were significantly lower in the cangrelor group. In-hospital ischemic events did not differ between groups. On regression analysis, patients on cangrelor were noted to have significantly lower major bleeding events (OR 0.23; 95% CI, 0.09-0.59). CONCLUSIONS:Balancing ischemic and bleeding risks with adjunctive antiplatelet drugs is of prime importance during PCI. Our real-world analysis shows that cangrelor is safe and effective when compared to GPI during PCI.

Background: Following a period of stability, the coronavirus disease 2019 (COVID-19) pandemic appears to be re-intensifying globally. As the pandemic continues to evolve, so does our understanding of its implications on ST-segment elevation myocardial infarction (STEMI). We sought to describe a single center STEMI experience at one of the epicenters of the COVID-19 pandemic.
Method(s): This was a retrospective observational study which included consecutive suspected STEMI patients from March 1 through August 31, 2019, (Cohort 1) compared to the same time period in 2020 (Cohort 2), at a tertiary referral center in Nassau County, New York.
Result(s): Cohort 2 (n=93) saw a similar number of acute myocardial infarction (AMI) team activations compared to cohort 1 (n=90) (Figure 1). Infection control measures and additional investigation were required to clarify the diagnosis in cohort 2, resulting in longer door-to-balloon times (95.9 minutes vs. 74.4 minutes, p=0.0587). We observed similar inpatient length of stay (LOS) (3.6 days vs. 5.0 days, p=0.0901) and mortality (13.2% vs. 9.2%, p=0.5876).
Conclusion(s): Our single-center study, located at one of the epicenters of the pandemic, demonstrated a similar number of AMI team activations, mimicking the seasonal variability seen in 2019, but with longer door-to-balloon times. Despite this, inpatient LOS and mortality remained unchanged. [Formula presented]
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Background: The advent of transcatheter aortic valve replacement (TAVR) has ignited the search for a mitral equivalent. Ongoing trials will attempt to design a safe and effective transcatheter mitral valve replacement (TMVR) device. In the interim, the US Food and Drug Administration has approved the balloon-expandable transcatheter heart valve system for the treatment of degenerated mitral bioprostheses. The purpose of this study was to detail the short- and long-term outcomes of high-risk patients undergoing TMVR at our institution.
Method(s): In this retrospective observational study, we reviewed data on the first 26 patients with previous surgical mitral valve replacement (MVR, 76.9%) or repair with ring (23.1%) who underwent TMVR using the third-generation transcatheter balloon-expandable valve at NYU Langone Hospital - Long Island from 2015 through 2019. We reviewed pre-/post-TMVR echocardiographic data, inpatient, 30-day, and 1-year data. Statistical analysis was performed using Student's t-test and Wilcoxon signed rank test.
Result(s): Of the 26 patients, the primary indication for TMVR was bioprosthetic valve regurgitation in 9 patients, bioprosthetic transvalvular stenosis in 9 patients, and mixed mitral disease in 8 patients. The average Society of Thoracic Surgeons score for MVR was 13.0%. Of the 26 TMVRs, 19 were transseptal and 7 were transapical. There was a 100% device implantation success rate and a 96.2% inpatient survival rate. At 30 days, there was a 96% survival rate. Mitral valve mean gradient (13.3 mmHg to 6.8 mmHg, p < 0.0001) and mitral regurgitation (3+ to 1+, p < 0.0001) showed significant improvement after TMVR. There were significant 30-day and 1-year improvements in patients' Kansas City Cardiomyopathy Questionnaire score following TMVR (47.8 to 75.7 to 84.0, p <0.0001).
Conclusion(s): We found that treatment of degenerated mitral bioprostheses using TMVR with the third-generation balloon-expandable transcatheter heart valve in high-risk patients resulted in significant improvements in short-term and long-term heart failure symptoms, which translated to robust short- and long-term survival.
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BACKGROUND:Previous studies from the Low Risk TAVR (LRT) trial demonstrated that transcatheter aortic valve replacement (TAVR) is safe and feasible in low-risk patients, with excellent 30-day and 1-year outcomes. The objective of this study was to report clinical outcomes and the impact of 30-day hypoattenuated leaflet thickening (HALT) on structural valve deterioration (SVD) 2 years after TAVR. METHODS:The LRT trial was the first Food and Drug Administration-approved Investigational Device Exemption trial in the United States to evaluate the safety and feasibility of TAVR in low-risk patients with symptomatic severe tricuspid aortic stenosis (AS). Valve hemodynamics and SVD by echo were recorded 30 days, 1 year, and 2 years post-TAVR. RESULTS:The LRT trial enrolled 200 low-risk patients to receive TAVR. Their mean age was 73.6 years and 61.5% were men. At 2-year follow-up, the mortality rate was 4.2%; the cardiovascular death rate was 1.6%. The disabling stroke rate was 1.1%, permanent pacemaker implantation rate was 8.6%, and 4 patients (2.2%) presented with endocarditis (2 between years 1 and 2). Of the 14% of TAVR subjects who had evidence of HALT at 30 days, there was no impact on valve hemodynamics, endocarditis or stroke at 2 years. CONCLUSIONS:TAVR for low-risk patients with symptomatic severe tricuspid AS is safe at 2 years. The presence of HALT at 30 days did not impact the early hemodynamic improvements nor the durability of the valve structure.

Background: B-type natriuretic peptide (BNP) has been established as a predictor of outcomes in patients who undergo surgical aortic valve replacement (SAVR). Studies on the prognostic value of BNP in high-risk patients undergoing transcatheter aortic valve replacement (TAVR) have yielded conflicting results. Additionally, BNP has not been well-studied in low- and intermediate-risk patients undergoing TAVR. The purpose of this study was to clarify the prognostic utility of baseline BNP in low-, intermediate-, and high-risk patients with severe aortic stenosis (AS) undergoing TAVR.
Method(s): This was a retrospective observational study of 1544 low-, intermediate-, and high-risk patients who underwent TAVR at our institution from 2012-2019. Included were patients who had a BNP <7 days prior to TAVR. Patients were then trichotomized into those with a pre-TAVR BNP <250 pg/mL (cohort 1), between 250-500 pg/mL (cohort 2), and >500 pg/mL (cohort 3). Outcomes of interest were inpatient and 30-day mortality. Statistical analyses of outcomes were performed using multivariate binary logistic regression.
Result(s): Of the 1544 patients screened, 1487 patients had a BNP level <7 days prior to TAVR and thus were included in the study. Patients in cohort 3 with a baseline BNP >500 pg/mL were 3.31 times more likely to have inpatient death (CI 0.142, 0.643; P=0.0019), 2.70 times more likely to have death within 30 days (CI 0.192, 0.711; P=0.0029) and 1.81 times more likely to have death within 1 year (CI 0.348, 0.880, p=0.0152).
Conclusion(s): Our study of 1487 low-, intermediate-, and high-risk patients demonstrates a baseline BNP greater than 500 pg/mL is an independent predictor of inpatient, 30-day and 1-year mortality. BNP has prognostic implications in TAVR patients across all risk groups and can help identify the subset of patients who may warrant closer follow up following TAVR.
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