Intraprocedural direct left atrial and wedge pressure correlation during transcatheter mitral valve repair: Results from a single center registry.

OBJECTIVES: This study investigates the correlation of occlusive wedge pressure (WP) with direct left atrial (LA) pressure in patients with severe mitral regurgitation (MR) undergoing transcatheter mitral valve repair (TMVr) with MitraClip. BACKGROUND: There is interest in acquiring objective hemodynamic parameters for intraprocedural guidance in patients undergoing MitraClip. METHODS: The study included 94 patients with severe MR at prohibitive surgical risk who underwent MitraClip at the University of California Davis Medical Center between 2014 and 2016. RESULTS: An average of 1.8 ± 0.7 clips were used to achieve MR grade of 2+ or less in 99% of patients. Correlation analysis of all (n = 236) pre-clip, inter-clip, and final-clip WP and LA pressures yielded a Pearson's R (r) of 0.85 and 0.79 for mean WP vs mean LA and WP V vs LA V, respectively. Median LA V to mean LA ratio (LAV:mLA) was 1.75 (IQR 1.5-1.9). 79% (n = 74) of patients had LAV:mLA ratio ≥ 1.5 with associated WP V vs LA V correlation (r) of 0.83. In patients with LAV:mLA ratio < 1.5, the correlation (r) was 0.69. Baseline characteristics were not significantly different between patients with LAV:mLA ratio ≥ 1.5 and patients with LAV:mLA ratio < 1.5. Post-procedure, median LA V: mean LA ratio decreased from 1.75 to 1.4, P = 0.0001. CONCLUSIONS: Correlation between WP and direct LA pressure in patients with severe MR undergoing Mitraclip is modest. Caution is advised when using WP to approximate LA pressure intraprocedurally, especially in patients with baseline low LAV:mLA ratios.

Outcomes of primary percutaneous coronary intervention in acute myocardial infarction due to unprotected left main thrombosis: The Asia-Pacific Left Main ST-Elevation Registry (ASTER).

INTRODUCTION: Prior studies of ULM STEMI have been confined to small cohorts. Recent registry data with larger patient cohorts have shown contrasting results. We aim to study the outcomes of patients with unprotected left main (ULM) ST-elevation myocardial infarction (STEMI) who underwent primary percutaneous coronary intervention (PCI). METHODS: The Asia-pacific left main ST-Elevation Registry (ASTER) is a multicenter retrospective registry involving 4 sites in Singapore, South Korea, and the United States. The registry included patients presenting with STEMI due to an ULM coronary artery culprit lesion who underwent emergency PCI. The primary outcome was in-hospital mortality. Secondary outcomes included major adverse cardiovascular events. RESULTS: A total of 67 patients (mean age 64.2 ± 12.8 years, 53 [79.1%] males) were included. The distal left main bifurcation was most commonly involved (85%, n = 57). Fifty one (76%) patients had TIMI 3 flow post-PCI. The in-hospital mortality rate was 47.8% (n = 32); 61% (n = 41) had cardiac failure, 4% (n = 3) had emergency coronary artery bypass grafting, 1% (n = 1) had a re-infarction, 3% (n = 2) had stroke and 55% (n = 37) had malignant ventricular arrhythmias. On multivariate analysis, predictors of in-hospital mortality included older age (odds ratio (OR) 1.085 (95% confidence interval (CI) 1.002-1.175), P = 0.044), diabetes mellitus (OR 10.882 (95%CI 11.074-110.287), P = 0.043) and absence of post-PCI TIMI 3 flow (OR 71.429 (95%CI 2.985-1000), P = 0.008). CONCLUSIONS: STEMI from culprit unprotected left main coronary artery stenosis is associated with significant mortality and morbidity. Emergency PCI provides an important treatment option in this high-risk group, but in-hospital mortality remains high.

Accuracy and procedural characteristics of standard needle compared with radiofrequency needle transseptal puncture for structural heart interventions.

OBJECTIVES: Our objectives were to assess for differences between standard and radiofrequency (RF) needle in procedural times, success, and spatial accuracy. BACKGROUND: Targeted transseptal (TS) puncture is essential for structural heart interventions. Spatial accuracy of standard versus RF needle has not been reported. METHODS: Consecutive patients undergoing structural heart interventions requiring TS puncture were studied retrospectively. A standard needle was alternated with a RF needle. Procedural success and times were recorded. Measurements based on intraprocedural transesophageal echocardiograms of the intended versus final TS crossing site were obtained. Pre-puncture and maximal tenting of the septum were also recorded. RESULTS: Twenty-five patients underwent standard needle and 27 RF TS access. All RF needle attempts to cross were successful without an assistance wire. Three standard needle patients required assisted crossing. After failed TS access, two patients had successful RF TS access. TS procedural times significantly favored the RF needle for time from septum to puncture (P = 0.02). Both standard and RF access yielded accurate crossing with no significant differences between the intended and actual crossing site. Maximal tenting was significantly less with the RF needle (P = 0.004). There were no major complications. CONCLUSIONS: In the hands of an experienced operator, there were no major clinically significant differences between the standard and RF needle approaches. However, procedural unassisted crossing success was higher with the RF needle approach as compared to standard needle. Procedural times and degree of septum tenting favored the RF over standard needle. Accuracy was similar with both approaches. RF was a successful strategy when standard needle failed. There were no major complications with either TS puncture strategy. © 2016 Wiley Periodicals, Inc.

Long-term outcomes of angiographically confirmed coronary stent thrombosis: results from a multicentre California registry.

AIMS: Limited data exist on long-term outcomes of patients with stent thrombosis (ST). Our aim was to describe the long-term outcomes after angiographically confirmed ST. METHODS AND RESULTS: In this multicentre registry, consecutive cases of definite ST were identified between 2005 and 2013. Clinical and procedural characteristics, in-hospital outcomes and long-term survival up to five years were compared between those with and those without adverse cardiovascular and cerebrovascular events (MACCE), defined as all-cause mortality, myocardial infarction and stroke. Two hundred and twenty-one patients with 239 stent thrombosis events were identified. Patients who developed MACCE were older, less likely to be men, and less likely to have hypertension. Angiographic characteristics were similar. Patients who had a MACCE event showed a trend towards a lower likelihood of procedural success (86% vs. 91%, p=0.05). MACCE rates were 22% at one year and 41% at five years. All-cause mortality was 13% at one year and 24% at five years. On multivariable analysis, age, diabetes mellitus, active smoking and ST at a bifurcation were independently associated with the occurrence of MACCE up to five years. CONCLUSIONS: Age, active smoking, diabetes mellitus and bifurcation disease are independently associated with long-term MACCE over a five-year follow-up period.

Angiographic characteristics of definite stent thrombosis: role of thrombus grade, collaterals, epicardial coronary flow, and myocardial perfusion.

OBJECTIVES: To characterize the prevalence of thrombus burden, collateral vessels to the infarct-related artery, epicardial coronary artery flow, and myocardial perfusion in patients with angiographically confirmed definite stent thrombosis (ST), and to define their relationship with associated treatments and outcomes. BACKGROUND: Angiographic characteristics of ST are not well defined. METHODS: All cases of angiographically determined ST at five academic hospitals from 2005 to 2012 were reviewed. Demographic, procedural, and angiographic characteristics were recorded. In-hospital and 1-year follow-up data were obtained. RESULTS: Among 205 cases of angiographic definite ST (60 ± 8 years; 87% male), the majority presented with late/very late ST (69%) and STEMI (66%). High-risk angiographic findings at presentation included thrombus grade 4-5 (87%), absence of collateral vessels (76%), and reduced initial TIMI 3 flow (90%). Final TIMI 3 flow was achieved in 90% of patients and was associated with greater use of aspiration thrombectomy (60% vs. 25%; P = 0.003), glycoprotein IIb/IIIa inhibitors (80% vs. 30%, P < 0.001), and repeat stenting (67% vs. 10%, P < 0.001). A final myocardial perfusion grade of 2-3 was achieved in 79% of patients and was associated with greater use of aspiration thrombectomy (61% vs. 36%, P = 0.003). After multivariable logistic regression, aspiration thrombectomy (AOR 2.6, 95% CI 1.3-5.2) and implantation of a new stent (AOR 2.1, 95% CI 1.1-4.3) were associated with optimal combined epicardial flow and myocardial perfusion. At 1-year follow-up, significantly lower risk of repeat ST (HR 0.1; 95% CI 0.1,0.2; P < 0.001) among patients with initial TIMI 3 flow at index ST was observed. CONCLUSIONS: The majority of ST patients present with late/very late ST with high thrombus burden and STEMI. Presence of collateral vessels and low thrombus burden is cardioprotective, while reduced initial TIMI flow is associated with larger infarct size and recurrent ST. Aspiration thrombectomy and repeat stenting are associated with improved epicardial coronary artery flow and myocardial perfusion among patients treated for ST. © 2014 Wiley Periodicals, Inc.

Predictors and outcomes of recurrent stent thrombosis: results from a multicenter registry.

OBJECTIVES: The aim of this study was to determine the incidence, predictors, and outcomes of recurrent stent thrombosis (rST). BACKGROUND: Patients who had an initial stent thrombosis (ST) develop may be at high risk of rST. METHODS: We analyzed a multicenter California registry of angiographic definite ST at 5 academic hospitals from 2005 to 2013. A detailed review of the angiogram and procedure was performed of patients with and without rST. RESULTS: Among 221 patients with a median follow-up of 3.3 years, definite or probable rST developed in 29, including 19 with angiographic definite rST. The cumulative hazard ratio (HR) of definite or probable rST was 16% at 1 year and 24% at 5 years, whereas the cumulative HR of angiographic definite rST was 11% at 1 year and 20% at 5 years. Despite similar angiographic results, patients who had rST develop had significantly greater peak creatine kinase at the time of initial ST (mean, 2,655 mg/dl vs. 1,654 mg/dl; p = 0.05) than those without rST. The 3-year rate of major adverse cardiovascular events was 50% for patients with rST compared with 22% for patients with a single ST (p = 0.01). After multivariable adjustment, independent predictors of definite/probable rST were age (HR: 1.4; 95 confidence interval [CI]: 1.1 to 1.8 per 10 years), bifurcation ST (HR: 4.4; 95% CI: 1.8 to 10.9), and proximal vessel diameter (HR: 1.8; 95% CI: 1.1 to 3.2 per millimeter). CONCLUSIONS: rST represents an important cause of long-term morbidity and mortality after an initial ST. Bifurcation ST and a larger proximal reference vessel diameter are independently associated with an increased risk of rST.

Right- and left-sided heart catheterization as a quality marker for catheterization laboratories (from the national Veterans Affairs clinical assessment reporting and tracking program).

The rate of concurrent right-heart catheterization (RHC) in patients undergoing left-heart catheterization (LHC) for coronary artery disease (CAD) indications or bilateral heart catheterization (BHC) is recommended as a measure of hospital quality, with higher rates suggesting over utilization. Our aim was to describe the prevalence of BHC and abnormal RHC findings in patients undergoing BHC with a primary indication for LHC. A retrospective analysis was performed for patients undergoing cardiac catheterization for CAD indications using the Department of Veterans Affairs Clinical Assessment Reporting and Tracking Program. Patients undergoing catheterization from October 2007 to September 2011 in 76 Veterans Affairs hospitals were included. Among 95,656 patients undergoing catheterization for CAD, 6,611 (6.9%) underwent BHC and 88,929 (93.0%) LHC. Among the patients undergoing BHC, 61.3% had at least 1 of the following abnormal RHC values: mean pulmonary artery (PA) pressure >25 mm Hg, pulmonary capillary wedge pressure (PCWP) >15 mm Hg, or pulmonary vascular resistance (PVR) >3 Woods units. A total of 37.5% of patients had mean PA pressures of 26 to 40 mm Hg and 11.1% had mean PA pressures >40 mm Hg. A total of 34.4% of patients had mean PCWP of 16 to 25 mm Hg and 13.6% had mean PAWP >25 mm Hg. A total of 16.5% of patients had PVR between 3 and 6 WU and 2.9% had PVR >6 WU. A total of 4.3% of patients met formal criteria for pulmonary arterial hypertension (defined as the combination of PA mean >25 mm Hg, PCWP ≤15 mm Hg, and PVR >3). In conclusion, these findings suggest that most BHC were performed for appropriate clinical reasons. Future studies should further explore BHC rate as an effective quality indicator.

Procedural success and long-term outcomes of aspiration thrombectomy for the treatment of stent thrombosis.

BACKGROUND: Stent thrombosis (ST) is associated with a significant burden of coronary thrombus and potential microvascular obstruction. Aspiration thrombectomy may decrease the extent of microvascular obstruction in patients with acute myocardial infarction but its role in the treatment of ST is uncertain. The present study sought to evaluate the association between aspiration thrombectomy, procedural success and long-term outcomes among patients presenting with ST. METHODS: In a multicenter cohort of patients with definite ST, procedural success, long-term mortality, and major adverse cardiovascular events (death, stroke, re-infarction, revascularization) were ascertained. Propensity weighting was used to determine the association between aspiration thrombectomy and long-term outcomes. RESULTS: A total of 205 patients with ST were identified. Among these, 115 (56%) patients underwent adjunctive aspiration thrombectomy during percutaneous coronary intervention. Patients undergoing aspiration thrombectomy were more likely to present with ST-elevation myocardial infarction (75% vs. 52%, P < 0.003) and require hemodynamic support (19% vs. 10%, P = 0.07). Aspiration thrombectomy was associated with improved procedural outcomes including postprocedural TIMI 3 flow, resulting in higher angiographic and procedural success (each 96% vs. 83%, P < 0.001). Despite improved angiographic outcomes, the use of aspiration thrombectomy was not associated with a difference in long-term mortality (adjusted HR 0.99, 95% CI 0.44-2.24) or major adverse cardiovascular events (adjusted HR 1.06, 95% CI 0.45-2.48). CONCLUSIONS: Aspiration thrombectomy is associated with improved coronary flow and procedural success but is not associated with improved long-term outcomes among patients undergoing percutaneous intervention for definite ST. CLINICAL TRIAL REGISTRATION: NCT00931502 (http://www.clinicaltrials.gov/ct2/show/NCT00931502)

Transradial and transfemoral coronary angiography and interventions: 1-year outcomes after initiating the transradial approach in a cardiology training program.

BACKGROUND: Limited data are available regarding the safety and feasibility of initiating transradial (TR) diagnostic coronary angiography (CA) and percutaneous coronary intervention (PCI) in cardiology fellowship programs. METHODS: From July 2010 to June 2011, University of California, Davis Medical Center, adopted the TR approach with supervised cardiology fellows as the primary operators. Procedural variables and clinical outcomes of TR and transfemoral (TF) procedures were compared. To minimize confounding variables, ST-elevation myocardial infarction, bypass graft interventions, chronic total occlusions, and procedures with concomitant right heart catheterizations were excluded. To reflect the learning curve of the TR approach, this experience was assessed in 2 sequential 6-month periods. RESULTS: A total of 402 diagnostic CAs and 255 PCIs were included. Transradial access was used in 141 (35%) of the CAs and in 72 (28%) of PCIs. Within the TR-CA and TF-CA (n = 261) groups, there was no difference between fluoroscopy (10.4 ± 6.0 vs 11.0 ± 8.9, P = .63) or procedure (31.8 ± 11.5 vs 33.2 ± 13.8, P = .55) time throughout the academic year with a significant trend toward lower contrast use (128 ± 52 vs 110 vs 50, P = .04) by the second half. In addition, during the second half of the academic year, the TR-CA showed significantly higher fluoroscopy (11.0 ± 8.9 vs 6.7 ± 6.8, P = .001) and procedure (33.2 ± 13.8 vs 27.2 ± 11.6, P = .0015) times when compared with TF-CA. Transfemoral PCI (n = 183) and TR-PCI showed no significant difference between all fluoroscopy and procedure time and contrast use when comparing the 2 halves of the academic year. When comparing TF with TR within each academic half year, there was no difference within the PCI group. Vascular complications were less with the TR approach. Overall procedural success rates were high, and there were low rates of crossover and periprocedural complications in both the TR and the TF groups. CONCLUSION: A TR approach is safe for CA and PCI when performed by supervised operators in training. Although the learning curve for trainees appears slower for TR-CA compared with TF-CA, cardiology fellowship training programs should be encouraged to adopt TR procedures as part of their curriculum.

Comparison of procedural success and long-term outcomes of stent thrombosis in coronary bypass grafts versus native coronary arteries.

Percutaneous coronary intervention within bypass grafts accounts for a significant percentage of total interventions. Bypass graft interventions are associated with an increased risk for stent thrombosis (ST), a condition that leads to significant morbidity and mortality. Despite this, the procedural characteristics and long-term outcomes of patients with bypass-graft ST have not been reported. The aim of the present study was to evaluate the procedural success and long-term outcomes of patients presenting with ST of coronary bypass grafts. Clinical and procedural characteristics of 205 ST cases at 5 academic hospitals were reviewed. Long-term mortality and major adverse cardiovascular events (stroke, reinfarction, and revascularization) were ascertained through review of medical records and the Social Security Death Index. Kaplan-Meier analysis was used to determine the association between ST in a bypass graft and long-term outcomes. Thirteen patients (6%) in the cohort presented with ST of a coronary bypass graft. Patients with bypass-graft ST had less severe presentations with a lower proportion of ST-segment elevation myocardial infarction (23% vs 69%, p <0.001). Despite this, ST of a bypass graft was associated with a trend toward reduced postprocedural Thrombolysis In Myocardial Infarction (TIMI) flow grade (p = 0.09), leading to lower angiographic (58% vs 92%, p <0.001) and procedural (62% vs 92%, p <0.001) success. After multivariate adjustment, bypass-graft ST was associated with increased long-term mortality (hazard ratio 3.3, 95% confidence interval 1.0 to 10.7) and major adverse cardiovascular events (hazard ratio 2.7, 95% confidence interval 1.1 to 6.9). In conclusion, ST in coronary bypass grafts is associated with reduced angiographic and procedural success as well as increased long-term major adverse cardiovascular events compared to ST in native coronary vessels.

Angiographically confirmed stent thrombosis in contemporary practice: insights from intravascular ultrasound.

OBJECTIVE: We hypothesized that patients presenting with stent thrombosis (ST) have a high prevalence of stent underexpansion and malapposition when assessed by intravascular ultrasound (IVUS). BACKGROUND: IVUS can provide mechanistic insight into mechanical factors, including stent underexpansion, malapposition, and fracture that may predispose to ST. METHODS: All consecutive cases of angiographically confirmed ST from a multicenter registry (from 2005 to 2010) were reviewed. All IVUS images were reviewed off-line for the presence of stent underexpansion, malapposition, and fracture. Kaplan-Meier analysis was used to determine whether use of IVUS at the time of ST was associated with long-term mortality and major adverse cardiovascular events. RESULTS: IVUS was performed in 32 of 173 subjects with ST (18%). Stent underexpansion was present in 82% of cases and in all cases of early ST, with a mean stent expansion of 0.7 ± 0.23 by MUSIC criteria. Stent malapposition was most frequently observed in very late ST (40%). In-hospital mortality was similar between subjects who had IVUS performed at the time of ST when compared with the non-IVUS group (3.2% vs. 4.3%, P = 0.8). Subjects who had IVUS performed at the time of ST had lower rates of mortality (HR 0.4, 95% CI 0.1-1.6, P =0.2) and major adverse cardiovascular events (HR 0.5, 95% CI 0.2-1.4, P =0.2) at follow-up, but these values were not statistically significant. CONCLUSIONS: There is a high prevalence of stent underexpansion in early ST, while the prevalence of malapposition is higher in very late ST. Use of IVUS during treatment for ST may identify mechanisms underlying the development of ST.

Direct Flow Medical valve.

AIMS: To study the feasibility and safety of the non-metallic, repositionable and retrievable percutaneous Direct Flow Medical (DFM) aortic valve. METHODS AND RESULTS: The first-generation (22 Fr) DFM valve has been evaluated in a prospective non-randomised trial in 31 high-risk patients with severe symptomatic aortic stenosis. The procedural success rate was 71%, 30-day mortality 12.9%. Survival at three years was 60% and all patients had none/trace aortic regurgitation at three years. Based on the initial experience, an 18 Fr device has been developed with several important revisions to improve the efficacy and safety of the procedure. Currently, it is being evaluated in a multicentre non-randomised trial which will include 100 patients. The primary endpoint is freedom from all-cause mortality at 30 days. CONCLUSIONS: The 22 Fr DFM valve has been successfully assessed in a first-in-man feasibility and safety trial. Up to three-year follow-up sustained clinical benefit and haemodynamic performance was demonstrated with no or trace aortic regurgitation in all patients. The 18 Fr DFM valve is under investigation in an on-going trial.

Prevalence and echocardiographic features of iatrogenic atrial septal defect after catheter-based mitral valve repair with the MitraClip system.

OBJECTIVES: Review the prevalence, echocardiographic features and potential predictors of iatrogenic ASD (iASD) created with the MitraClip guiding catheter. BACKGROUND: Catheter-based repair of mitral regurgitation (MR) with the MitraClip device (Abbott Vascular, Menlo Park, CA), is performed through a 22-French transseptal guiding catheter. The echocardiographic prevalence of iASDs after the MitraClip procedure has not been reported. METHODS: Thirty subjects undergoing MitraClip repair during the roll-in phase of the EVEREST II randomized trial who had baseline, 30 day, 6 and 12 month transthoracic echocardiograms (TTEs) available for review were included. Patients who underwent surgery for MR within the first 12 months were excluded. Residual iASD size, right ventricular (RV) size, left atrial (LA) volume, and tricuspid/MR grade were quantified. RESULTS: iASDs were found at 12 months in 8 patients (27%) with a mean diameter of 6.6 ± 3.1 mm. Subjects with iASD at 12 months had more residual MR, increased TR and a trend toward larger LA volumes than non-iASD patients. 83% of non-ASD patients were free from MR > 2+ at 12 mos. vs. 38% of those with iASD (p=0.016). There were no other significant associations between clinical and echocardiographic variables and the persistence of iASD. CONCLUSIONS: After MitraClip repair, persistent iASDs occur at a rate comparable to reports after other transseptal interventional procedures and do not appear hemodynamically significant. Patients with persistent iASDs had less MR reduction at 12-months and a trend toward larger LA volumes, suggesting that increased LA pressure may be a mechanism for persistent iASD.

Angiographic stent thrombosis at coronary bifurcations: short- and long-term prognosis.

OBJECTIVES: This study sought to describe the presentation, management, and outcomes of patients presenting with angiographic definite stent thrombosis (ST) at coronary bifurcations. BACKGROUND: The development of drug-eluting stents has made it increasingly feasible to treat bifurcation lesions percutaneously. However, ST at coronary bifurcations may be associated with greater mortality than ST elsewhere. METHODS: We analyzed a multicenter California registry comprising all cases of angiographic definite ST at 5 academic hospitals from 2005 to 2010. Stenting was defined as occurring at a bifurcation if the main vessel stent crossed a side branch ≥2.0 mm in diameter (provisional single-stent approach), or if there was a prior 2-stent bifurcation approach. RESULTS: Among 173 cases of angiographic definite ST, we identified 20 cases of ST at coronary bifurcations. Nine of 20 bifurcation ST (45%) occurred with a stent present in both the parent and branch vessel. Eight cases had thrombus present in both the parent and side branch vessels. In-hospital mortality was much higher for subjects with bifurcation ST than ST at a nonbifurcation site (20% vs. 2%, p < 0.0001). During a median follow-up of 2.3 years, ST at a coronary bifurcation was associated with increased long-term mortality (hazard ratio [HR]: 3.3, 95% confidence interval [CI]: 1.4 to 7.7, p = 0.007) and a significantly higher risk for major adverse cardiovascular events (HR: 2.2, 95% CI: 1.04 to 4.8, p = 0.04) relative to ST at a nonbifurcation site. CONCLUSIONS: ST at coronary bifurcations is associated with a higher in-hospital and long-term mortality than ST at nonbifurcation lesions. (Stent Thrombus in Acute Coronary Syndromes; NCT00931502).

Contemporary clinical characteristics, treatment, and outcomes of angiographically confirmed coronary stent thrombosis: results from a multicenter California registry.

OBJECTIVES: To describe the contemporary treatment and outcomes for patients with angiographically confirmed (definite) stent thrombosis (ST). BACKGROUND: Limited data are available on contemporary treatment patterns and outcomes of patients with ST in the United States. METHODS: In this multicenter California registry, consecutive cases of definite ST over 5 years were identified. Clinical characteristics, in-hospital outcomes, and long-term survival are reported. RESULTS: One hundred and sixty five consecutive episodes of ST were identified in 153 patients from January 2005 to February 2010. The distribution of acute (≤24 hr), subacute (24 hr to 30 days), late (30 days to 1 year), and very late (≥1 year) ST was 3.9%, 21.8%, 17.6%, and 50.3%, respectively. Only 41.2% of patients were on dual antiplatelet therapy at the time of presentation, while 22.4% of patients were on none. Of the 61.4% of patients treated with restenting, 71.1% of them received a drug-eluting stent. Procedural success was 88.1%, and in-hospital death, stroke, and CABG occurred in 5.5%, 0.6%, and 6.1% of subjects, respectively. All-cause mortality at 1 year was 14.3%. Although female gender, diabetes mellitus (DM), bifurcation disease, ejection fraction <40%, and cardiogenic shock at the time of presentation were associated with an increased risk of in-hospital mortality, only DM (P = 0.047) and bifurcation disease (P = 0.027) remained independent predictors of in-hospital death. CONCLUSION: In-hospital mortality from definite ST is lower than previously reported, but long-term mortality remains high. DM and bifurcation disease, but not type of percutaneous therapy, are independently associated with in-hospital mortality.

Midterm stability and hemodynamic performance of a transfemorally implantable nonmetallic, retrievable, and repositionable aortic valve in patients with severe aortic stenosis. Up to 2-year follow-up of the direct-flow medical valve: a pilot study.

BACKGROUND: Misplacement during percutaneous aortic valve implantation can be associated with severe complications. The direct flow medical (DFM) valve is repositionable and retrievable; however, the nonmetallic inflatable and conformable design of the valve results in less radial force, which may have an impact on stability and valve function over time. We, therefore, analyzed the midterm stability of the position, shape, and hemodynamic performance of the DFM percutaneous aortic valve. METHODS AND RESULTS: Sixteen symptomatic high-risk for surgery patients with aortic stenosis and a logistic EuroSCORE >20 underwent implantation and were the subject of this analysis. Clinical, echocardiographic, and dual-source multislice computed tomography data were obtained during 2-year follow-up. The 1- and 2-year survival rates were 81% and 69%, respectively. The dual-source multislice computed tomography follow-up indicated no changes in position, diameter, and orifice area of the DFM valve over time. Echocardiography revealed a significant decrease of the mean gradient from baseline (50.1±11.3 mm Hg) to 30 days (19.6±5.7 mm Hg, P<0.001), which remained stable over 2 years. The aortic valve area increased from 0.57±0.15 cm(2) at baseline to 1.47±0.35 cm(2) at 30 days (P<0.001) and did not significantly change during 2-year follow-up. Of the patients, 73% had no aortic regurgitation (AR) and 27% had minimal AR. CONCLUSIONS: In this preliminary series, the 2-year follow-up data of patients, in whom the nonmetallic, repositionable, and retrievable DFM valve was successfully implanted, show stability of the position, shape, and hemodynamic performance, with no AR in most patients.