Citations

AbstractBackgroundChange in left atrial pressure (LAP) has been shown to be associated with symptom improvement post‐MitraClip; however, the association between acute procedural changes in transmitral diastolic mean gradient (MG) compared to LAP and symptom improvement is not well established.Methods164 consecutive patients undergoing MitraClip at Mayo Clinic between June 2014 and May 2018 were included. Preclip and postclip MG and LAP were recorded. Baseline demographics, clinical, and echocardiographic outcomes, including 30‐day New York Heart Association (NYHA) functional status were obtained from patient charts.ResultsMedian age was 81.5 years (IQR: 76.3, 87), 34% were female and 94.5% had NYHA class III and IV functional status at baseline. At baseline, median MG was 4 mmHg (IQR: 3, 5) and LAP was 19 mmHg (IQR: 16, 23.5). Following MitraClip deployment, the median MG was 4 mmHg (IQR: 3, 6) and the median LAP was 17 mmHg (IQR: 14, 21), 69.5% of patients had less than moderate MR. There was no statistically significant association between change in MG and NYHA functional class at 30 days (OR = 0.95, 95% CI: 0.76–1.20). However, a reduction in LAP following MitraClip deployment was significantly associated with improvement in NYHA functional status at 30 days following adjustments for age and sex (aOR 3.36, 95% CI: 1.34–8.65). There was no significant correlation between change in mean LAP and change in MG (p = .98).ConclusionUnlike change in left atrial pressure, change in MG post‐MitraClip was not associated with patient reported outcomes at 30 days and did not correlate with change in left atrial pressure. Long‐term follow up is needed to evaluate the impact of LA pressure on symptoms.

Background Whether the poor outcomes of isolated tricuspid valve surgery are related to the operation itself or to certain patient characteristics including late referral is unknown. Methods and Results Adult patients who underwent isolated tricuspid valve surgery were identified in the Nationwide Readmissions Database (2016–2017). Patients who had redo tricuspid valve surgery, endocarditis, or congenital heart disease were excluded. Multivariable logistic regression was performed to identify contributors to postoperative mortality. A total of 1513 patients were included (mean age 55.7±16.6 years, 49.6% women). Surrogates of late referral were frequent: 41% of patients were admitted with decompensated heart failure, 44.3% had a nonelective surgery status, 16.8% had advanced liver disease, and 31% had an unplanned hospitalization in the prior 90 days. The operation was performed on day 0 to 1 of the hospitalization in only 50% of patients, and beyond day 10 in 22% of patients. In‐hospital mortality occurred in 8.7% of patients. Median length of stay was 14 days (7–35 days), and median cost was $87 223 ($43 122–$200 872). In multivariable logistic regression analysis, surrogates for late referrals (acute heart failure decompensation, nonelective surgery status, or advanced liver disease) were the strongest predictors of in‐hospital mortality (odds ratio [OR], 4.75; 95% CI, 2.74–8.25 [ P <0.001]). This was also consistent in a second model incorporating unplanned hospitalizations in the 90 days before surgery as a surrogate for late referral (OR, 5.50; 95% CI, 2.28–10.71 [ P <0.001]). Conclusions The poor outcomes of isolated tricuspid valve surgery may be largely explained by the late referral for intervention. Studies are needed to determine the role of early intervention for severe isolated tricuspid regurgitation.

Abstract Background Transcatheter aortic valve replacement (TAVR) was initially approved as an alternative to surgery for patients at high surgical risk. However, it is now being considered for patients with intermediate and low surgical risk. This will result in the expansion of patient pool for TAVR; hence it is of interest to ascertain risk of blood stream infection (BSI) and infective endocarditis (IE) following TAVR. We aim to study the incidence, epidemiology and risk factors associated with IE in patients who underwent TAVR and subsequently developed a BSI. Methods A population-based study was conducted in 7 counties in southeastern Minnesota using the expanded Rochester Epidemiology Project (E-REP) for all adult (≥18 years) patients who underwent TAVR from January 1st, 2010 to December 31st, 2018. Transcatheter procedures that included replacement of either the aortic or mitral valve were included. Medical records were screened for development of BSI from time of TAVR until May 15th, 2020. Patients were classified as having BSI only, BSI with IE at outset, or BSI with subsequent development of new IE. ‘Early’ IE was defined as that occurring &lt; 12 months following TAVR, with subsequent cases defined as ‘late’ IE. Results A total of 247 patients underwent TAVR during the study period. There were 24 patients with of BSI and 10 (42%) developed IE with an annual incidence of 5 per 1000 persons-years. Median age for patients who developed IE was 85.4 years. Male gender was affected predominantly (70%). Six developed IE at outset of BSI, while four developed IE subsequent to IE. The median time to development of IE was 791 days following TAVR. There was an equal number of early and late IE cases (n=5). The most common pathogen causing IE was viridians group streptococci (n=4) followed by enterococci and coagulase-negative staphylococci with 2 patients each. Mean Charlson comorbidity index was 6.6. Two patients with IE died before resolution of infection (20%). Conclusion The incidence of BSI and subsequent IE in patients with TAVR was low in our population. Due to the small number of BSI and IE cases, statistical analysis was not feasible. An analysis of all cases seen at Mayo Clinic is planned since the number of cases would be much higher to investigate potential risk factors associated with BSI and IE. Disclosures Larry M. Baddour, MD, Boston Scientific (Consultant) M. Rizwan Sohail, MD, Aziyo Biologics (Consultant)Medtronic Inc (Consultant, Research Grant or Support)

Abstract Background There is a paucity of data about the prevalence and natural history of mitral annular calcification (MAC). Purposes In a large cohort of patients undergoing clinically-indicated echocardiography, we aimed to evaluate the prevalence and the natural history of MAC, and the frequency of associated mitral valve dysfunction (MVD). Methods Retrospective review of all patients who underwent echocardiographic evaluation at our institution between January 1st and December 31st 2015. The patients were stratified into 3 groups: MAC with MVD, MAC without MVD, no MAC. MVD was defined as moderate or greater mitral regurgitation (MR) or stenosis (MS). The 3 groups were compared for baseline clinical and echocardiographic characteristics and all-cause mortality during follow-up. Results Of 24,415 evaluated patients, 5478 (22%) had MAC. Patients with MAC were older (75±10 vs. 60±16 years, p&lt;0.01) and more often female (46% vs. 43%, p&lt;0.01). MVD was more frequently observed in patients with MAC (16% vs. 7%, p&lt;0.01); moderate or greater MR was found in 10% of patients with MAC vs. 6% without MAC (p&lt;0.01) and MS in 7% vs. 0.5% (p&lt;0.01). In patients with MAC, those with MVD were more often female and more frequently had creatinine ≥2mg/dl and moderate or greater aortic stenosis (AS) than those without MVD (Fig. A). Kaplan-Meier survivals at 1 year were 75% in patients with MAC and MVD, 87% in those with MAC without MVD, and 92% in those without MAC (Fig B). Adjusted for age, sex, diabetes, creatinine ≥2 mg/dl, coronary artery disease, left ventricular ejection fraction &lt;50%, and AS, MAC was associated with higher all-cause mortality (adjusted hazard ratio1.4, 95% confidence interval: 1.3–1.5, p&lt;0.01); combined MAC and MVD was associated with the highest mortality during follow-up of 2.5±1.8 years. Conclusion In a large cohort of patients undergoing echocardiographic evaluation, the prevalence of MAC was 22%. MV dysfunction was more than twice as prevalent in patients with MAC as without. Patients with MAC had higher all-cause mortality than patients without MAC. Among patients with MAC and mitral valvular dysfunction, adjusted mortality was two-fold higher compared to those without MAC. Funding Acknowledgement Type of funding source: None

Objective To comprehensively explore contemporary differences between bicuspid aortic valve (BAV) and tricuspid aortic valve (TAV) patients with chronic haemodynamically significant aortic regurgitation (AR). Methods Consecutive patients with chronic ≥moderate-severe AR from a tertiary referral centre (2006–2017) were included. All-cause mortality, surgical indications and aortic valve surgery (AVS) were analysed. Results Of 798 patients (296 BAV-AR, age 46±14 years; 502 TAV-AR, age 67±14 years, p<0.0001) followed for 5.5 (IQR: 2.9–9.2) years, 403 underwent AVS (repair in 96) and 154 died during follow-up. The 8-year AVS incidence was 60%±3% versus 53%±3% for BAV-AR and TAV-AR, respectively (p=0.014). The unadjusted (real-life) 8-year total survival was 93%±7% versus 71%±2% for BAV-AR and TAV-AR, respectively (p<0.0001), and became statistically insignificant after sole adjustment for age (p=0.14). The within-group relative risk of death in BAV-AR patients demonstrated a large age-dependent increase (two fold at 50–55 years, up to 10-fold at 70 years). The presence of baseline symptoms was significantly associated with death for both BAV-AR (p=0.039) and TAV-AR (p<0.0001), but the strength of the association decreased with age adjustment for BAV-AR (age-adjusted HR 2.43 (0.92–6.39), p=0.07) and not for TAV-AR (age-adjusted HR, 2.3 (1.6–3.3), p<0.0001). As compared with general population, TAV-AR exhibited baseline excess risk which further increased at left ventricular ejection fraction (LVEF) <60% and left ventricular end-systolic dimension index (LVESDi) >20 mm/m2; similar thresholds were observed for BAV-AR patients. Conclusion BAV-AR patients were two decades younger than TAV-AR and underwent AVS more frequently, resulting in a considerable real-life survival advantage for BAV-AR that was determined primarily by age and not valve anatomy. Pragmatically, regardless of valve anatomy, patients with haemodynamically significant AR and age >50–55 years require a low-threshold for surgical referral to prevent symptom development where LVEF <60% and LVESDi >20 mm/m2 seem appropriate referral thresholds.

AbstractObjectivesThe aim of this study was to assess the 30 day incidence of paravalvular leak (PVL) and need for aortic valve reintervention of a fourth generation balloon expandable transcatheter valve with enhanced skirt (4G‐BEV) (SAPIEN 3 Ultra) compared with a third generation balloon expandable transcatheter valve (3G‐BEV) (SAPIEN 3).BackgroundThe incidence of PVL has steadily declined with iterative improvements in transcatheter aortic valve replacement (TAVR) technology and implantation strategies.MethodsPatients who underwent TAVR at Mayo Clinic from 7/2018 to 7/2019 were included in a prospective institutional registry. 4G‐BEV has been utilized since 2/2019, and, after this date, 3G‐BEV and 4G‐BEV were simultaneously used. 4G‐BEV had three sizes (20, 23, and 26 mm) while 3G‐BEV included four sizes (20, 23, 26, and 29 mm). Both cohorts were evaluated at 30 days post‐TAVR with a transthoracic echocardiogram to assess for PVL.ResultsA total of 260 consecutive patients were included. Of these, 101 patients received a 4G‐BEV and 159 patients received a 3G‐BEV. There were more females (p = .0005) and a lower aortic valve calcium score (p = .02) in the 4G‐BEV cohort at baseline. Age, STS risk score, NYHA Class, and aortic valve mean gradient did not differ between groups. 4G‐BEV was associated with a lower incidence of mild PVL (10.8 vs. 36.5%; p < .0001) and moderate PVL (0 vs. 5.8%) compared to the 3G‐BEV at 30 days. There was no association between PVL and valve size in either cohort.ConclusionsUtilization of 4G‐BEV is associated with reduced PVL at 30 days post‐TAVR compared with 3G‐BEV.

AbstractObjectivesWe aimed to investigate the invasive hemodynamic changes with transcatheter mitral valve replacement (TMVR) in patients with severe mitral stenosis due to severe mitral annular calcification.BackgroundThe hemodynamic response to TMVR in patients with mitral stenosis related to degenerative mitral annular calcification has not been fully elucidated.MethodsWe conducted retrospective review of patients who underwent successful transseptal TMVR with balloon‐expandable valves for symptomatic severe mitral stenosis due to mitral annular calcification at our institution between January 2014 and February 2020. Invasive hemodynamic measurements were obtained both before valve implantation (predeployment) and after (postdeployment).ResultsEighteen patients (age 72 ± 10 years, 44% female) were included for the analysis. There was a significant reduction in mean left atrial pressure (23.7 ± 5.6 mmHg versus 20.6 ± 4.8 mmHg; p = .01), left atrial v‐wave (mean 39.3 ± 10.2 mmHg versus 32.9 ± 9.9 mmHg; p = .01), and an increase in systemic mean blood pressure (72.6 mmHg ±11.2 versus 79.5 ± 9.9 mmHg; p = .02) postdeployment compared to predeployment. Patients who had symptom improvement at 30‐day follow‐up tended to have greater reduction in mean left atrial pressure (4.4 ± 4.4 mmHg versus 0.5 ± 5.2 mmHg; p = .16) and v‐wave (8.6 ± 9.0 mmHg versus 0.7 ± 8.4 mmHg; p = .10) compared to those who did not experience improvement of symptoms.ConclusionsTransseptal TMVR for severe mitral stenosis due to mitral annular calcification is associated with reductions in mean left atrial pressure and left atrial v‐wave, and an increase in systemic arterial pressure.

Background: Mitral valve-in-valve (ViV) and valve-in-ring (ViR) are alternatives to surgical reoperation in patients with recurrent mitral valve failure after previous surgical valve repair or replacement. Our aim was to perform a large-scale analysis examining midterm outcomes after mitral ViV and ViR. Methods: Patients undergoing mitral ViV and ViR were enrolled in the Valve-in-Valve International Data Registry. Cases were performed between March 2006 and March 2020. Clinical endpoints are reported according to the Mitral Valve Academic Research Consortium (MVARC) definitions. Significant residual mitral stenosis (MS) was defined as mean gradient ≥10 mm Hg and significant residual mitral regurgitation (MR) as ≥ moderate. Results: A total of 1079 patients (857 ViV, 222 ViR; mean age 73.5±12.5 years; 40.8% male) from 90 centers were included. Median STS-PROM score 8.6%; median clinical follow-up 492 days (interquartile range, 76–996); median echocardiographic follow-up for patients that survived 1 year was 772.5 days (interquartile range, 510–1211.75). Four-year Kaplan-Meier survival rate was 62.5% in ViV versus 49.5% for ViR ( P <0.001). Mean gradient across the mitral valve postprocedure was 5.7±2.8 mm Hg (≥5 mm Hg; 61.4% of patients). Significant residual MS occurred in 8.2% of the ViV and 12.0% of the ViR patients ( P =0.09). Significant residual MR was more common in ViR patients (16.6% versus 3.1%; P <0.001) and was associated with lower survival at 4 years (35.1% versus 61.6%; P =0.02). The rates of Mitral Valve Academic Research Consortium–defined device success were low for both procedures (39.4% total; 32.0% ViR versus 41.3% ViV; P =0.01), mostly related to having postprocedural mean gradient ≥5 mm Hg. Correlates for residual MS were smaller true internal diameter, younger age, and larger body mass index. The only correlate for residual MR was ViR. Significant residual MS (subhazard ratio, 4.67; 95% CI, 1.74–12.56; P =0.002) and significant residual MR (subhazard ratio, 7.88; 95% CI, 2.88–21.53; P <0.001) were both independently associated with repeat mitral valve replacement. Conclusions: Significant residual MS and/or MR were not infrequent after mitral ViV and ViR procedures and were both associated with a need for repeat valve replacement. Strategies to improve postprocedural hemodynamics in mitral ViV and ViR should be further explored.