Faculty Bibliography

Background Patients with chronic kidney disease (CKD) have poor short-term outcomes after transcatheter aortic valve replacement (TAVR). Methods Retrospective review identified 575 consecutive patients not on hemodialysis (HD) who underwent TAVR at a single center between September 2014 and January 2017. Patients were stratified by pre-procedural glomerular filtration rate (GFR) [>60 (n=297), 30-60 (n=242), and <30 (n=36)]. Outcomes were defined by VARC-2 criteria. Median follow-up was 811 days. Results Transfemoral artery access (TFA), used in 98.8%, and VARC-2 defined procedural success, achieved in 81.4%, did not differ between groups. However, rates of peri-procedural stroke (0.7%, 2.1%, 11.1%; p<0.001) and acute kidney injury (0%, 1.7%, 8.3%; p<0.001) were higher with lower GFR. When compared to GFR >60, risk of all-cause mortality was higher with GFR 30-60 (Hazard ratio (HR) 1.61 [1.00-2.59]) and GFR <30 (HR 2.41 [1.06-5.49]). After adjustment for differences in baseline and procedural characteristics, all-cause mortality remained higher with GFR <60 (adjusted HR 1.67 [1.03-2.70]) compared with GFR >60. Rate of long-term all-cause mortality was higher with lower GFR (10.1%, 16.5%, 19.4%). Kaplan-Meier mortality estimates are shown. Conclusion Few patients with a pre-procedural GFR <30 but not HD undergo TAVR. Despite high use of TFA and no difference in procedural success rate, long-term all-cause mortality after TAVR is higher in patients with pre-procedural CKD. [Figure presented]
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OBJECTIVE:This study evaluated whether the pulmonary artery pulsatility index (PAPi) collected before and after cardiopulmonary bypass (CPB) is predictive and diagnostic of new onset right ventricular (RV) failure in the elective cardiac surgical population. DESIGN/METHODS:This was a prospective observational study of patients who underwent cardiac surgery between 2017 and 2019. SETTING/METHODS:Weill Cornell Medicine, a single large academic medical center. PARTICIPANTS/METHODS:The study comprised 19 patients undergoing elective cardiac surgery. INTERVENTIONS/METHODS:Cardiopulmonary bypass, transesophageal echocardiography, pulmonary artery catheter, and elective cardiac surgery. MEASUREMENTS AND MAIN RESULTS/RESULTS:Echocardiographic and hemodynamic data were collected at 2 time points: pre-CPB and post-chest closure/post-CPB. Patients with and without post-CPB RV dysfunction fractional area of change (<35%) were compared, and receiver operating characteristic curves were constructed. One hundred and nineteen patients undergoing elective surgery-coronary artery bypass grafting (23%), aortic valve replacement (21%), aortic surgery (19%), and combined surgery (37%)-were evaluated. Post-CPB RV dysfunction was associated with lower pre-CPB PAPi values (2.0 ± 1.0 v 2.5 ± 1.2; p = 0.001 and p = 0.03) and higher pre-CPB central venous pressure (8.3 ± 3.6 and 6.9 ± 2.7; p = 0.003 and p = 0.02, respectively). Pre-CPB PAPi (0.98 [95% confidence interval {CI} 0.96-0.99]), end systolic area (0.99 [95% CI 0.98-0.99]), and end diastolic area (1.01 [95% CI 1.001-1.02]) were independently associated with RV dysfunction in multivariable modeling, with a lower PAPi and end systolic area and higher end diastolic area demonstrating a greater risk of RV dysfunction post-CPB (post-CPB area under the curve for PAPi 0.80 [95% CI 0.71-0.88; sensitivity = 0.68, specificity = 0.93, optimal cutoff = 1.9]). CONCLUSIONS:PAPi measured pre-CPB is a potential predictor and marker of post-CPB RV dysfunction and may have diagnostic utility in cardiac surgery. Additional, large-scale studies are needed to confirm this finding.

OBJECTIVES/OBJECTIVE:This study sought to minimize the risk of permanent pacemaker implantation (PPMI) with contemporary repositionable self-expanding transcatheter aortic valve replacement (TAVR). BACKGROUND:Self-expanding TAVR traditionally carries a high risk of PPMI. Limited data exist on the use of the repositionable devices to minimize this risk. METHODS:At NYU Langone Health, 248 consecutive patients with severe aortic stenosis underwent TAVR under conscious sedation with repositionable self-expanding TAVR with a standard approach to device implantation. A detailed analysis of multiple factors contributing to PPMI was performed; this was used to generate an anatomically guided MInimizing Depth According to the membranous Septum (MIDAS) approach to device implantation, aiming for pre-release depth in relation to the noncoronary cusp of less than the length of the membranous septum (MS). RESULTS:Right bundle branch block, MS length, largest device size (Evolut 34 XL; Medtronic, Minneapolis, Minnesota), and implant depth > MS length predicted PPMI. On multivariate analysis, only implant depth > MS length (odds ratio: 8.04 [95% confidence interval: 2.58 to 25.04]; p < 0.001) and Evolut 34 XL (odds ratio: 4.96 [95% confidence interval: 1.68 to 14.63]; p = 0.004) were independent predictors of PPMI. The MIDAS approach was applied prospectively to a consecutive series of 100 patients, with operators aiming to position the device at a depth of < MS length whenever possible; this reduced the new PPMI rate from 9.7% (24 of 248) in the standard cohort to 3.0% (p = 0.035), and the rate of new left bundle branch block from 25.8% to 9% (p < 0.001). CONCLUSIONS:Using a patient-specific MIDAS approach to device implantation, repositionable self-expanding TAVR achieved very low and predictable rates of PPMI which are significantly lower than previously reported with self-expanding TAVR.

BACKGROUND:inhibition prevents postprocedural thrombocytopenia is uncertain. METHODS: platelets/μL; n = 14), or without baseline platelet count (n = 4) were excluded. The primary outcome was proportion of patients who developed >20% decrease in platelet count from baseline to day 1 post-TAVR. RESULTS:inhibition developed thrombocytopenia on day 1 post-TAVR (25.5% vs. 36.4%, p = .1). CONCLUSION/CONCLUSIONS:inhibition prior to TAVR were less likely to demonstrate a decrease in platelet count after TAVR. Prospective studies to further understand the clinical implication of these findings are warranted.