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1.
Comput Biol Med ; 172: 108191, 2024 Apr.
Article En | MEDLINE | ID: mdl-38457932

Bicuspid aortic valve (BAV), the most common congenital heart disease, is prone to develop significant valvular dysfunction and aortic wall abnormalities such as ascending aortic aneurysm. Growing evidence has suggested that abnormal BAV hemodynamics could contribute to disease progression. In order to investigate BAV hemodynamics, we performed 3D patient-specific fluid-structure interaction (FSI) simulations with fully coupled blood flow dynamics and valve motion throughout the cardiac cycle. Results showed that the hemodynamics during systole can be characterized by a systolic jet and two counter-rotating recirculation vortices. At peak systole, the jet was usually eccentric, with asymmetric recirculation vortices and helical flow motion in the ascending aorta. The flow structure at peak systole was quantified using the vorticity, flow rate reversal ratio and local normalized helicity (LNH) at four locations from the aortic root to the ascending aorta. The systolic jet was evaluated with the peak velocity, normalized flow displacement, and jet angle. It was found that peak velocity and normalized flow displacement (rather than jet angle) gave a strong correlation with the vorticity and LNH in the ascending aorta, which suggests that these two metrics could be used for clinical noninvasive evaluation of abnormal blood flow patterns in BAV patients.


Bicuspid Aortic Valve Disease , Heart Valve Diseases , Humans , Aortic Valve/abnormalities , Heart Valve Diseases/diagnostic imaging , Aorta , Hemodynamics/physiology
2.
J Cardiol Cases ; 29(2): 78-81, 2024 Feb.
Article En | MEDLINE | ID: mdl-38362582

A 66-year-old female was diagnosed with combined post- and pre-capillary pulmonary hypertension due to heart failure with reduced ejection fraction (47 %) and functional mitral regurgitation [mean pulmonary arterial wedge pressure: 27 mmHg; pulmonary arterial pressure: 91/30 (56) mmHg; pulmonary vascular resistance: 12.9 Wood units; and cardiac index: 1.77 L/min/m2]. Following treatment with vericiguat (a novel oral soluble guanylate cyclase stimulator), hemodynamics improved [mean pulmonary arterial wedge pressure: 27 mmHg; pulmonary arterial pressure: 54/26 (35) mmHg; pulmonary vascular resistance: 2.2 Wood units; and cardiac index: 2.80 L/min/m2]. Therefore, transcatheter edge-to-edge repair for functional mitral regurgitation was performed. One month later, further improvement in hemodynamics was confirmed. Learning objective: Vericiguat (a novel oral soluble guanylate cyclase stimulator) and transcatheter edge-to-edge mitral valve repair may improve combined post- and pre-capillary pulmonary hypertension due to low ejection fraction of the left ventricle and functional mitral regurgitation.

3.
JACC Asia ; 3(6): 925-934, 2023 Dec.
Article En | MEDLINE | ID: mdl-38155789

Background: There are limited data on the impact of intracardiac echocardiography (ICE)-guided transcatheter aortic valve replacement (TAVR) on the new permanent pacemaker implantation (PPMI) rate. Objectives: This study investigated the feasibility and outcome of transjugular ICE (TJ-ICE) -guided TAVR, by visualizing the relationship between the membranous septum (MS) and the transcatheter aortic valve (TAV). Methods: Among patients with severe aortic stenosis who underwent TAVR between February 2017 and June 2020, this study enrolled a total of 163 patients with TJ-ICE-guided TAVR. MS length was measured by ICE. The primary endpoint of this study was the incidence of new PPMI at 30 days. Results: The mean age of the patients in this study was 84.9 ± 4.6 years, and 71.2% of the patients were female. Device success was 96.3% with TJ-ICE guidance. A TJ-ICE-related complication occurred in 1 case (0.6%). The median length of the MS was 5.8 mm (IQR: 5.0-6.9 mm). Excellent intraobserver (intraclass correlation coefficient [ICC]: 0.94; 95% CI:0.79-0.98; P < 0.001) and interobserver (ICC: 0.93; 95% CI: -0.05 to 0.98; P < 0.001) agreements were shown. The new PPMI rate was 6.7% at 30 days without a significant difference between balloon-expandable valves and self-expandable valves (3.4% vs 8.7%; P = 0.226). Patients with a TAV implantation depth less than MS length had a significantly lower incidence of new PPMI compared with patients with a TAV implantation depth greater than MS length (2.1% vs 13.4%; P = 0.005), regardless of baseline right bundle branch block presence (6.7% vs 66.7%; P = 0.004) or absence (1.2% vs 8.2%; P = 0.041). Conclusions: TJ-ICE-guided TAVR demonstrated remarkable feasibility and safety. The TJ-ICE-guided final TAV position had a significant impact on the new PPMI rate. (Tokai Valve Registry; UMIN000036671).

4.
Am J Cardiol ; 209: 1-7, 2023 12 15.
Article En | MEDLINE | ID: mdl-37839463

The indications or timing of aortic valve replacement for symptomatic aortic stenosis (AS) are based on a patient's life expectancy and symptoms. However, clinical decision-making may be difficult because symptoms are subjective and cannot be quantitatively assessed and confirmed. This study aimed to evaluate the association between heart failure (HF)-related symptoms and cardiac hemodynamic left ventricular deformations in patients with severe AS using transthoracic echocardiographic assessments of left ventricular global longitudinal strain (LV-GLS). The medical records of patients hospitalized for AS between February 2017 and September 2019 were retrospectively screened. Independent cardiologists analyzed the transthoracic echocardiographic images of a digital echocardiography database. The cohort comprised 177 hospitalized patients with severe AS and no history of HF. The subgroup with HF-related symptoms included 87 patients, whereas that without HF-related symptoms included 90 patients. In 145 patients without atrial fibrillation, the left atrial volume index (LAVI) and LV-GLS were significantly associated with HF-related symptoms (odds ratio 1.033, 95% confidence interval 1.008 to 1.059, p = 0.011 and odds ratio 1.224, 95% confidence interval 1.118 to 1.340, p <0.0001, respectively). Moreover, the combination of brain natriuretic peptide level, LAVI, and LV-GLS showed better diagnostic accuracy than the combination of brain natriuretic peptide level and LAVI (p = 0.005). However, there were no such tendencies in 32 patients with atrial fibrillation. The HF-related symptoms in patients with severe AS were strongly linked to LV-GLS. LV-GLS showed incremental value for confirming HF-related symptoms.


Aortic Valve Stenosis , Atrial Fibrillation , Heart Failure , Ventricular Dysfunction, Left , Humans , Ventricular Function, Left , Retrospective Studies , Risk Factors , Atrial Fibrillation/complications , Global Longitudinal Strain , Natriuretic Peptide, Brain , Heart Failure/complications , Aortic Valve Stenosis/complications , Aortic Valve Stenosis/diagnosis , Aortic Valve Stenosis/surgery , Stroke Volume
5.
Echocardiography ; 40(11): 1187-1195, 2023 11.
Article En | MEDLINE | ID: mdl-37715609

INTRODUCTION: This study aimed to investigate the mechanisms and clinical implications of mitral regurgitation (MR) in patients with severe aortic stenosis (AS) who received transcatheter aortic valve replacement (TAVR). METHODS: We conducted retrospective echocardiographic analyses at baseline and 6 months after TAVR in 140 patients with symptomatic AS (85 ± 5 years) who underwent TAVR. We defined significant MR as ≥ moderate based on evaluation of transthoracic echocardiography (TTE). RESULTS: There were 48 patients (34%) with preexisting MR at the baseline. Among measured TTE parameters, end-systolic wall stress (ESWS), mitral annulus area, and mitral valve thickening index were independent factors associated with preexisting MR (odds ratio [OR]: 1.013, 95% confidence interval [CI]: 1.005-1.021; OR: 1.740, 95% CI: 1.314-2.376; OR: 2.306, 95% CI: 1.426-3.848; respectively). Six months after TAVR, there were 34 patients with post-existing MR, A history of atrial fibrillation and ESWS after TAVR were independent factors (OR: 3.013, 95% CI: 1.208-7.556; OR: 1.013, 95% CI: 1.000-1.023; respectively). The Kaplan-Meier plot indicated that preexisting MR was a risk factor for heart failure-related events within 1 year of discharge after TAVR (p = .012). CONCLUSIONS: In patients who underwent TAVR for severe AS, preexisting MR was associated with having a thickened mitral valve and large mitral annulus size induced by high ESWS. These patients may have worse prognosis after TAVR and should be closely monitored in the long term.


Aortic Valve Stenosis , Mitral Valve Insufficiency , Transcatheter Aortic Valve Replacement , Humans , Mitral Valve Insufficiency/complications , Mitral Valve Insufficiency/diagnostic imaging , Aortic Valve/diagnostic imaging , Aortic Valve/surgery , Retrospective Studies , Aortic Valve Stenosis/complications , Aortic Valve Stenosis/surgery , Treatment Outcome , Severity of Illness Index
6.
JACC Cardiovasc Interv ; 16(4): 415-425, 2023 02 27.
Article En | MEDLINE | ID: mdl-36858660

BACKGROUND: Transcatheter aortic valve replacement (TAVR)-related coronary artery obstruction prediction remains unsatisfactory despite high mortality and novel preventive therapies. OBJECTIVES: This study sought to develop a predictive model for TAVR-related coronary obstruction in native aortic stenosis. METHODS: Preprocedure computed tomography and fluoroscopy images of patients in whom TAVR caused coronary artery obstruction were collected. Central laboratories made measurements, which were compared with unobstructed patients from a single-center database. A multivariate model was developed and validated against a 1:1 propensity-matched subselection of the unobstructed cohort. RESULTS: Sixty patients with angiographically confirmed coronary obstruction and 1,381 without obstruction were included. In-hospital death was higher in the obstruction cohort (26.7% vs 0.7%; P < 0.001). Annular area and perimeter, coronary height, sinus width, and sinotubular junction height and width were all significantly smaller in the obstructed cohort. Obstruction was most common on the left side (78.3%) and at the level of the coronary artery ostium (92.1%). Coronary artery height and sinus width, but not annulus area, were significant risk factors for obstruction by logistic regression but performed poorly in predicting obstruction. The new multivariate model (coronary obstruction IF cusp height > coronary height, AND virtual valve-to-coronary distance ≤4 mm OR culprit leaflet calcium volume >600 mm3) performed well, with an area under the curve of 0.93 (sensitivity = 0.93, specificity = 0.84) for the left coronary artery and 0.94 (sensitivity = 0.92, specificity = 0.96) for the right. CONCLUSIONS: A novel computed tomography-based multivariate prediction model that can be implemented routinely in real-world practice predicted coronary artery obstruction from TAVR in native aortic stenosis.


Aortic Valve Stenosis , Coronary Occlusion , Transcatheter Aortic Valve Replacement , Humans , Hospital Mortality , Treatment Outcome , Heart
7.
Intern Med ; 62(17): 2457-2463, 2023 Sep 01.
Article En | MEDLINE | ID: mdl-36725049

Objective This study retrospectively compared the outcomes of emergently admitted patients with aortic stenosis (AS) with or without urgent transcatheter aortic valve replacement (TAVR). Methods Patients hospitalized between February 2015 and December 2019 for symptomatic AS were retrospectively analyzed by comparing the received conservative management [continued medical therapy with or without elective surgical transcatheter replacement (SAVR) or TAVR scheduled after the index hospitalization] and urgent TAVR (TAVR during the index hospitalization). Results The cohort comprised 114 patients with symptomatic AS who required emergency admission. Urgent TAVR was performed for 37 patients, while conservative management was provided for 77 patients, including 1 who received urgent SAVR. Urgent TAVR was more likely to be performed in patients with a history of hospitalization for heart failure, high New York Heart Association class scores, a lower clinical frailty scale at admission, and a high aortic valve peak velocity (p=0.01, p<0.001, p<0.01 and p=0.02, respectively). Kaplan-Meier analyses with log-rank test revealed favorable outcomes of urgent TAVR in all-cause mortality and cardiovascular events within 60 days of admission (p<0.01, p<0.01, respectively). Conclusion Urgent TAVR had better short-term outcomes in patients with symptomatic AS who required emergency hospital admission than conservative management. When considering urgent TAVR, patients with typical heart failure symptoms due to AS with a history of heart failure hospitalization and relatively little frailty can be selected.


Aortic Valve Stenosis , Frailty , Heart Failure , Heart Valve Prosthesis Implantation , Transcatheter Aortic Valve Replacement , Humans , Transcatheter Aortic Valve Replacement/methods , Retrospective Studies , Frailty/surgery , Treatment Outcome , Risk Factors , Aortic Valve/surgery , Aortic Valve Stenosis/complications , Aortic Valve Stenosis/surgery , Hospitalization , Heart Failure/surgery , Hospitals , Heart Valve Prosthesis Implantation/methods
9.
Cardiovasc Revasc Med ; 53S: S176-S179, 2023 08.
Article En | MEDLINE | ID: mdl-35879191

A cardiogenic shock patient with a history of a surgical mitral valve replacement presented to the hospital with critical mitral stenosis with thickening of prosthetic valve leaflets and thrombus in left atrial appendage. We considered TMVR inside of the degenerated bioprosthetic valve. However, there were two concerns during TMVR based on multimodality imaging assessment: 1) LVOT obstruction due to the surgical bioprosthetic leaflet, 2) stroke due to left atrial appendage thrombus. We performed TMVR with LAMPOON (laceration of the anterior leaflet of the surgical valve to prevent left ventricular outflow tract obstruction) for the bioprosthesis using cerebral protection. While the LAMPOON procedure has developed to prevent LVOT obstruction by the native anterior mitral leaflet during transcatheter mitral valve-in-ring or valve-in-mitral annular calcification, this is the first case that illustrates its use for mitral valve-in-valve replacement.


Bioprosthesis , Heart Valve Prosthesis Implantation , Heart Valve Prosthesis , Thrombosis , Ventricular Outflow Obstruction , Humans , Heart Valve Prosthesis Implantation/adverse effects , Heart Valve Prosthesis Implantation/methods , Risk Factors , Cardiac Catheterization/adverse effects , Cardiac Catheterization/methods , Treatment Outcome
10.
J Am Coll Cardiol ; 80(17): 1601-1613, 2022 10 25.
Article En | MEDLINE | ID: mdl-36265955

BACKGROUND: There are limited data on the prognostic impact of periprocedural pulmonary hypertension (PH) after transcatheter aortic valve replacement (TAVR). OBJECTIVES: The aim of this study was to investigate the prognostic impact of normalized, new-onset, and residual PH after TAVR. METHODS: The OCEAN-TAVI (Optimized Transcatheter Valvular Intervention-Transcatheter Aortic Valve Implantation) registry is an ongoing, multicenter Japanese registry that includes 2,588 patients who underwent TAVR. Patients were classified into 4 groups according to periprocedural systolic pulmonary artery pressure by echocardiography: no PH before and after TAVR (no PH), PH before but not after TAVR (normalized PH), PH after but not before TAVR (new-onset PH), and PH before and after TAVR (residual PH). A systolic pulmonary artery pressure cutoff of >36 mm Hg was applied for PH. The primary endpoint was all-cause mortality at 2 years. Logistic regression analysis was used to identify clinical predictors of residual and new-onset PH. RESULTS: In total, 1,872 patients were divided into 4 groups: 1,027 (54.9%) in the no PH group, 257 (13.7%) in the normalized PH group, 280 (15.0%) in the new-onset PH group, and 308 (16.5%) in the residual PH group. There was a significant difference in all-cause mortality among the 4 groups at 2 years (11.0%, 12.8%, 18.6%, and 24.7%, respectively; P < 0.01). Among 565 patients who had preprocedural PH, 257 (45.5%) experienced normalization of PH, with mortality comparable with that in the no PH group. In multivariable logistic regression analysis, predictors of residual PH after TAVR were atrial fibrillation and baseline tricuspid regurgitation moderate or greater, whereas prosthesis-patient mismatch was a predictor of new-onset PH. CONCLUSIONS: Risk stratification on the basis of post-TAVR PH status can identify patients at increased mortality after TAVR. Prosthesis-patient mismatch was identified as a novel predictor of new-onset PH. (Optimized Transcatheter Valvular Intervention-Transcatheter Aortic Valve Implantation [OCEAN-TAVI]; UMIN000020423).


Aortic Valve Stenosis , Hypertension, Pulmonary , Transcatheter Aortic Valve Replacement , Humans , Transcatheter Aortic Valve Replacement/adverse effects , Echocardiography/adverse effects , Registries , Treatment Outcome , Aortic Valve/surgery , Risk Factors , Severity of Illness Index
11.
J Thorac Cardiovasc Surg ; 164(3): e105-e117, 2022 09.
Article En | MEDLINE | ID: mdl-33342573

OBJECTIVE: With the recent expanded indication for transcatheter aortic valve replacement to low-risk surgical patients, thrombus formation in the neosinus is of particular interest due to concerns of reduced leaflet motion and long-term transcatheter heart valve durability. Although flow stasis likely plays a role, a direct connection between neosinus flow stasis and thrombus severity is yet to be established. METHODS: Patients (n = 23) were selected to minimize potential confounding factors related to thrombus formation. Patient-specific 3-dimensional reconstructed in vitro models were created to replicate in vivo anatomy and valve deployment using the patient-specific cardiac output and idealized coronary flows. Dye was injected into each neosinus to quantify washout time as a measure of flow stasis. RESULTS: Flow stasis (washout time) showed a significant, positive correlation with thrombus volume in the neosinus (rho = 0.621, P < .0001). Neither thrombus volume nor washout time was significantly different in the left, right, and noncoronary neosinuses (P ≥ .54). CONCLUSIONS: This is the first patient-specific study correlating flow stasis with thrombus volume in the neosinus post-transcatheter aortic valve replacement across multiple valve types and sizes. Neosinus-specific factors create hemodynamic and thrombotic variability within individual patients. Measurement of neosinus flow stasis may guide strategies to improve outcomes in transcatheter aortic valve replacement.


Aortic Diseases , Aortic Valve Stenosis , Heart Valve Prosthesis , Thrombosis , Transcatheter Aortic Valve Replacement , Aortic Diseases/surgery , Aortic Valve/diagnostic imaging , Aortic Valve/surgery , Aortic Valve Stenosis/diagnostic imaging , Aortic Valve Stenosis/etiology , Aortic Valve Stenosis/surgery , Hemodynamics , Humans , Thrombosis/diagnostic imaging , Thrombosis/etiology , Thrombosis/surgery , Transcatheter Aortic Valve Replacement/adverse effects , Transcatheter Aortic Valve Replacement/methods
12.
Circ Cardiovasc Interv ; 14(11): e011028, 2021 11.
Article En | MEDLINE | ID: mdl-34674556

BACKGROUND: Bioprosthetic or native aortic scallop intentional laceration to prevent iatrogenic coronary artery obstruction (BASILICA) and laceration of the anterior mitral leaflet to prevent outflow obstruction (LAMPOON) reduce the risk of coronary and left ventricular outflow obstruction obstruction during transcatheter aortic valve replacement and transcatheter mitral valve replacement. Despite successful laceration, BASILICA or LAMPOON may fail to prevent obstruction caused by inadequate leaflet splay in patients having challenging anatomy such as very small valve-to-coronary distance, diffusely calcified, rigid leaflets, or undergoing transcatheter aortic valve replacement inside existing transcatheter aortic valve replacement. We describe a novel technique of balloon-augmented (BA) leaflet laceration to enhance leaflet splay. METHODS: We measured the incremental leaflet splay from BA-BASILICA in vitro. From November 2019 to March 2021, 16 patients underwent BA-BASILICA and 4 BA-LAMPOON at 3 centers. RESULTS: BA-BASILICA increased benchtop leaflet tip splay 17%, maximum splay angle 30%, and splay area 23%, resulting in a more rounded apex and larger effective area. Sixteen patients at risk for inadequate BASILICA leaflet splay, including 4 transcatheter aortic valve replacement inside existing transcatheter aortic valve replacement, underwent BA-BASILICA. All had successful leaflet laceration. One had coronary obstruction requiring immediate orthotopic stenting. Two underwent elective orthotopic coronary stenting through the transcatheter valve cells for leaflet prolapse without coronary ischemia. There were no deaths during the procedure or at 30 days. Four patients at risk for inadequate anterior mitral leaflet splay underwent BA-LAMPOON. All had successful target leaflet laceration without left ventricular outflow obstruction obstruction or procedural death. One died within 30 days. CONCLUSIONS: BA leaflet laceration enhances leaflet splay in vitro and may allow transcatheter aortic valve replacement and transcatheter mitral valve replacement in patients otherwise ineligible for traditional BASILICA or LAMPOON due to challenging anatomy. Graphic Abstract: A graphic abstract is available for this article.


Heart Valve Prosthesis Implantation , Heart Valve Prosthesis , Lacerations , Pectinidae , Transcatheter Aortic Valve Replacement , Animals , Coronary Vessels/diagnostic imaging , Coronary Vessels/surgery , Heart Valve Prosthesis Implantation/adverse effects , Humans , Iatrogenic Disease/prevention & control , Lacerations/etiology , Lacerations/prevention & control , Mitral Valve/diagnostic imaging , Mitral Valve/surgery , Transcatheter Aortic Valve Replacement/adverse effects , Treatment Outcome
13.
JACC Cardiovasc Interv ; 14(20): 2195-2214, 2021 10 25.
Article En | MEDLINE | ID: mdl-34674861

The SAPIEN 3 is the only transcatheter heart valve commercially available for compassionate transcatheter mitral valve replacement in patients with previous mitral surgical rings and mitral annular calcification (valve in ring [VIR] and valve in mitral annular calcification [VIM]). Reported outcomes have been inconsistent or poor. The review provides an overview of the authors' approach to achieve largely consistent results despite the intrinsic limitations of SAPIEN 3 VIM and VIR. The approach includes bedside modifications of the valve implant, the delivery system, and of the cardiac substrate itself. Until purpose-built devices are readily available, VIR and VIM procedures will require aggressive multidisciplinary cooperation, meticulous planning and execution, and postprocedure management by experienced, high-volume operators.


Heart Valve Prosthesis Implantation , Heart Valve Prosthesis , Cardiac Catheterization/adverse effects , Heart Valve Prosthesis Implantation/adverse effects , Humans , Mitral Valve/diagnostic imaging , Mitral Valve/surgery , Treatment Outcome
15.
ESC Heart Fail ; 8(3): 2349-2353, 2021 06.
Article En | MEDLINE | ID: mdl-33787080

AIMS: Outflow graft obstruction is a poorly described complication following left ventricular assist device (LVAD) surgery. We sought to define the incidence of LVAD outflow graft obstruction and assess clinical outcomes with a percutaneous treatment strategy. METHODS AND RESULTS: From January 2012 to October 2020, 322 patients with LVAD were managed at our institution. Patients with LVAD outflow graft obstruction were identified by cardiac computed tomography with angiography and invasive haemodynamic assessment and were subsequently treated with percutaneous intervention. Poisson regression was used to analyse time-dependent differences in the incidence of LVAD outflow graft obstruction. Kaplan-Meier analysis was used to estimate survival. Twenty patients (6.2%) developed haemodynamically significant LVAD outflow graft obstruction at a rate of 0.03 events per patient-year. Outflow graft obstruction presented a median of 33 (26-49) months after surgery. Patients presented with low estimated LVAD pump flow (95%), heart failure (90%), or both (85%), and 59% developed cardiogenic shock prior to intervention. The most common aetiology identified by cardiac computed tomography with angiography was external compression of the outflow graft (78%). On presentation, the median peak gradient in the outflow graft was 78 (64-100) mmHg. Outflow graft stenting was 100% successful with no in-hospital mortality, and it reduced the peak outflow graft gradient to 10 (2-17) mmHg (P < 0.001). Outflow graft stenting was durable with two patients (10%) requiring a repeat procedure over a median follow-up of 13 (7-20) months and did not impact survival. CONCLUSIONS: Left ventricular assist device outflow graft obstruction is a relatively common and underappreciated cause of recurrent heart failure and LVAD dysfunction. Outflow graft stenting can be achieved with low morbidity and provides a long-term solution to this complication.


Heart Failure , Heart-Assist Devices , Heart-Assist Devices/adverse effects , Hospital Mortality , Humans , Retrospective Studies , Shock, Cardiogenic/epidemiology , Shock, Cardiogenic/etiology
16.
JACC Cardiovasc Interv ; 14(5): 541-550, 2021 03 08.
Article En | MEDLINE | ID: mdl-33663781

OBJECTIVES: The purpose of this study was to evaluate tip-to-base intentional laceration of the anterior mitral leaflet to prevent left ventricular outflow tract obstruction (LAMPOON) in patients undergoing transcatheter mitral valve replacement (TMVR) in annuloplasty rings or surgical mitral valves. BACKGROUND: LAMPOON is an effective adjunct to TMVR that prevents left ventricular outflow tract obstruction (LVOTO). Laceration is typically performed from the base to the tip of the anterior mitral leaflet. A modified laceration technique from leaflet tip to base may be effective in patients with a prosthesis that protects the aortomitral curtain. METHODS: This is a multicenter, 21-patient, consecutive retrospective observational cohort. Patients underwent tip-to-base LAMPOON to prevent LVOTO and leaflet overhang, or therapeutically to lacerate a long anterior mitral leaflet risking or causing LVOTO. Outcomes were compared with findings from patients in the LAMPOON investigational device exemption trial with a prior mitral annuloplasty. RESULTS: Twenty-one patients with a annuloplasty or valve prosthesis-protected mitral annulus underwent tip-to-base LAMPOON (19 preventive, 2 rescue). Leaflet laceration was successful in all and successfully prevented or treated LVOTO in all patients. No patients had significant LVOTO upon discharge. There were 2 cases of unintentional aortic valve injury (1 patient underwent emergency transcatheter aortic valve replacement and 1 patient underwent urgent surgical aortic valve replacement). In both cases, the patients had a supra-annular ring annuloplasty, and the retrograde aortic guiding catheter failed to insulate the guidewire lacerating surface from the aortic root. All patients survived to 30 days. Compared with classic retrograde LAMPOON, there was a trend toward shorter procedure time. CONCLUSIONS: Tip-to-base laceration is a simple, effective, and safe LAMPOON variant applicable to patients with an appropriately positioned mitral annular ring or bioprosthetic valve. Operators should take care to insulate the lacerating surface from adjacent structures.


Heart Valve Prosthesis Implantation , Heart Valve Prosthesis , Mitral Valve Insufficiency , Ventricular Outflow Obstruction , Cardiac Catheterization/adverse effects , Heart Valve Prosthesis Implantation/adverse effects , Humans , Mitral Valve/diagnostic imaging , Mitral Valve/surgery , Mitral Valve Insufficiency/diagnostic imaging , Mitral Valve Insufficiency/surgery , Retrospective Studies , Treatment Outcome
17.
Ann Cardiothorac Surg ; 10(1): 172-179, 2021 Jan.
Article En | MEDLINE | ID: mdl-33575191

Transcatheter mitral valve replacement (TMVR) is a therapeutic option for patients with severe mitral disease who are deemed inoperable due to their overall surgical risk. The close relationships between the left ventricular outflow tract (LVOT) and the anterior mitral valve leaflet can lead to LVOT obstruction, a common complication with high mortality. Predicting and preventing LVOT obstruction is therefore essential, prior to TMVR. Laceration of the Anterior Mitral leaflet to Prevent Outflow ObtructioN (LAMPOON) is a transcatheter electrosurgical technique to split the anterior mitral valve leaflet immediately prior to TMVR. The technique has been studied in a prospective clinical trial and has evolved with many iterations for specific anatomies. In this review, we discuss the different LAMPOON techniques to prevent and treat LVOT obstruction.

18.
Heart Rhythm O2 ; 2(6Part A): 607-613, 2021 Dec.
Article En | MEDLINE | ID: mdl-34988505

BACKGROUND: Conduction disturbances leading to permanent pacemaker implantation (PPI) rarely occur late after transcatheter aortic valve replacement (TAVR). The clinical features of this phenomenon and its association with periprocedural conduction disturbances remain uncertain. OBJECTIVES: We aimed to determine the incidence and characteristics of late-onset atrioventricular block (AVB) after TAVR. METHODS: This single-center study included 246 patients undergoing TAVR. Late-onset AVB was defined as AVB ≥1 month after the TAVR. RESULTS: Periprocedural AVB (periAVB) occurred in 43 patients (17%). Patients with periAVB had a higher rate of right bundle branch block (47% vs 7%, P < .0001). Of the 43 patients with periAVB, 15 underwent PPI (35%) at a median duration of 6 days, whereas 1 of the remaining 203 patients without periAVB underwent PPI within 1 month (0.5%). During a median follow-up duration of 365 days, late-onset AVB occurred in 10 of 230 patients without PPI within 1 month (4%) at a median duration of 76 days. All 10 patients presented transient periprocedural atrioventricular conduction disturbances, including 8 patients with periAVB (80%), all of whom recovered within 1 month, and 9 patients underwent self-expanding valve implantation (90%). The mortality rate in patients with PPI within 1 month was higher than in those without, although the difference was not statistically significant (hazard ratio 2.68, 95% confidence interval 0.97-9.05, log-rank P = .09). CONCLUSION: Late-onset AVB occurred in a minority of patients undergoing TAVR. Greater vigilance is warranted, particularly in patients with transient conduction disturbances during the periprocedural period following self-expanding valve implantation.

19.
Catheter Cardiovasc Interv ; 97(3): 529-539, 2021 02 15.
Article En | MEDLINE | ID: mdl-32845036

BACKGROUND: There is a paucity of data regarding the optimum timing of PCI in relation to TAVR. OBJECTIVE: We compared the major adverse cardiovascular and cerebrovascular events (MACCE) rates among patients who underwent percutaneous coronary intervention (PCI) before transcatheter aortic valve replacement (TAVR) with those who received PCI with/after TAVR. METHODS: In this multicenter study, we pooled all consecutive patients who underwent TAVR at three high volume centers. RESULTS: Among 3,982 patients who underwent TAVR, 327 (8%) patients underwent PCI within 1 year before TAVR, 38 (1%) had PCI the same day as TAVR and 15 (0.5%) had PCI within 2 months after TAVR. Overall, among patients who received both PCI and TAVR (n = 380), history of previous CABG (HR:0.501; p = .001), higher BMI at TAVR (HR:0.970; p = .038), and statin therapy after TAVR (HR:0.660, p = .037) were independently associated with lower MACCE while warfarin therapy after TAVR was associated with a higher risk of MACCE (HR:1.779, p = .017). Patients who received PCI within 1 year before TAVR had similar baseline demographics, STS scores, clinical risk factors when compared to patients receiving PCI with/after TAVR. Both groups were similar in PCI (Syntax Score, ACC/AHA lesion class) and TAVR (valve types, access) related variables. There were no significant differences in terms of MACCE (log rank p = .550), all-cause mortality (log rank p = .433), strokes (log rank p = .153), and repeat PCI (log rank p = .054) in patients who underwent PCI with/after TAVR when compared to patients who received PCI before TAVR. CONCLUSION: Among patients who underwent both PCI and TAVR, history of CABG, higher BMI, and statin therapy had lower, while those discharged on warfarin, had higher adverse event rates. Adverse events rates were similar regardless of timing of PCI.


Aortic Valve Stenosis , Coronary Artery Disease , Percutaneous Coronary Intervention , Transcatheter Aortic Valve Replacement , Aortic Valve Stenosis/diagnostic imaging , Aortic Valve Stenosis/surgery , Coronary Artery Disease/surgery , Coronary Artery Disease/therapy , Humans , Percutaneous Coronary Intervention/adverse effects , Registries , Risk Factors , Transcatheter Aortic Valve Replacement/adverse effects , Treatment Outcome
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