Guidance for performance, utilization, and education of cardiac and lung point-of-care ultrasonography from the Japanese Society of Echocardiography.

In recent years, bedside ultrasound examinations have been used in many clinical departments and are called point-of-care ultrasound (POCUS). Regarding POCUS in the cardiac field, a protocol called focus (focused) cardiac ultrasound (FoCUS) has been developed in Europe and the United States, is being used clinically, and an educational syllabus has been created. According to them, FoCUS is defined as a point-of-care cardiac ultrasound examination using standardized limited sections and protocols. FoCUS is primarily intended to be performed by non-cardiologists, and in order to avoid making mistakes in judgment, it is important to be familiar with its limitations and it is necessary to understand pathological conditions that can only be diagnosed using conventional comprehensive echocardiography. The Japanese Society of Echocardiography has edited this clinical guideline because we believe that FoCUS should be used effectively and appropriately in Japan, and that appropriate education is essential to popularize FoCUS in Japan. Furthermore, lung POCUS has recently come into clinical use. Lung POCUS is useful for the diagnosis and follow-up of heart failure when used in conjunction with FoCUS, and is especially useful in primary care where chest X-rays are not available. The working group that created this manual agreed that it is desirable to educate patients about lung POCUS in conjunction with FoCUS, so we decided to include the basic techniques of lung POCUS and how to use them in this manuscript.

Reduced variability of visual left ventricular ejection fraction assessment with reference images: The Japanese Association of Young Echocardiography Fellows multicenter study.

BACKGROUND: Visual estimation of left ventricular ejection fraction (LVEF) is widely applied to confirm quantitative EF. However, visual assessment is subjective, and variability may be influenced by observer experience. We hypothesized that a learning session might reduce the misclassification rate. METHODS: Protocol 1: Visual LVEFs for 30 cases were measured by 79 readers from 13 cardiovascular tertiary care centers. Readers were divided into 3 groups by their experience: limited (1-5 years, n=28), intermediate (6-11 years, n=26), and highly experienced (12-years, n=25). Protocol 2: All readers were randomized to assess the effect of a learning session with reference images only or feedback plus reference images. After the session, 20 new cases were shown to all readers following the same methodology. To assess the concordance and accuracy pre- and post-intervention, each visual LVEF measurement was compared to overall average values as a reference. RESULTS: Experience affected the concordance in visual EF values among the readers. Groups with intermediate and high experience showed significantly better mean difference (MD), standard deviation (SD), and coefficient of variation (CV) than those with limited experience at baseline. The learning session with reference image reduced the MD, SD, and CV in readers with limited experience. The learning session with reference images plus feedback also reduced proportional bias. Importantly, the misclassification rate for mid-range EF cases was reduced regardless of experience. CONCLUSION: This large multicenter study suggested that a simple learning session with reference images can successfully reduce the misclassification rate for LVEF assessment.

Association of postprocedural aortic regurgitation with mitral regurgitation worsened after transcatheter aortic valve replacement.

BACKGROUND: There is a paucity of investigation which demonstrates a predictor of mitral regurgitation (MR) worsened after aortic valve replacement (TAVR). AIM: The aim of this study was to identify the predictor of worsened MR after transcatheter TAVR. METHODS: We retrospectively studied a total of 209 patients with mild or less MR at baseline who underwent TAVR for the treatment of severe aortic stenosis with the balloon-expandable device. We found the presence of MR worsened after TAVR in 6% (12 patients) of all patients. Moderate or more postprocedural aortic regurgitation (AR) (odds ratio, 8.104; 95% confidence interval, 1.78-36.87; P = .007) was identified as a predictor of MR worsening after TAVR. In-hospital outcomes indicated that patients within whom MR worsened suffered congestive heart failure more than those with unchanged or improved MR after TAVR (P < .05). CONCLUSION: Significant postprocedural AR was associated with MR worsened from mild or less to moderate or more after TAVR. Worsened MR might affect in-hospital congestive heart failure.

Different indicators for postprocedural mitral stenosis caused by single- or multiple-clip implantation after percutaneous mitral valve repair.

BACKGROUND: Postprocedural mitral stenosis (MS) is a main limitation for MitraClip™ (Abbot Vascular, Inc., Santa Clara, CA, USA) procedure. The purpose of this study was to detect the preprocedural predictors of high transmitral pressure gradient (TMPG) after MitraClip™ implantation, which indicated postprocedural mitral stenosis (MS). METHODS: We studied 79 patients who were implanted with MitraClip™ in our institute. Before the procedure, mitral valve orifice area (MVOA), and anterior-posterior (AP) and medial-lateral (ML) mitral annular diameters were measured at diastole using three-dimensional (3D) transesophageal echocardiography (TEE) data set. After the procedure, the mean TMPG was assessed using continuous-wave (CW) Doppler by periprocedural TEE. RESULTS: Preprocedural MVOA, and AP and ML diameter of left ventricular (LV) inflow orifices were larger in patients with mean TMPG ≤4mmHg than in patients with TMPG >4mmHg after 1-and 2-clip implantation. The large MVOA and ML diameter of LV inflow orifice strongly correlated with the low TMPG after 1- and 2-clip implantation. As a result of the receiver operating characteristic curve analysis, the preprocedural MVOA predicted the low postprocedural TMPG more accurately than the ML diameter of LV inflow orifice after 1-clip implantation either in the degenerative or functional mitral regurgitation (MR) patients. After 2-clip implantation, however, the preprocedural ML diameter of LV inflow orifice predicted it more accurately than the MVOA in the degenerative and functional MR patients. CONCLUSIONS: 3D TEE derived MVOA predicts the postprocedural MS after 1-clip implantation, however, preprocedural ML diameter of LV inflow orifice is more useful to predict after 2-clip implantation.

Vena contracta analysis by color Doppler three-dimensional transesophageal echocardiography shows geometrical differences between prolapse and pseudoprolapse in eccentric mitral regurgitation.

AIMS: Evaluation of eccentric mitral regurgitation (MR) remains extremely difficult and the role played by its etiology, functional or degenerative, is not well understood. This study aimed to demonstrate the value of three-dimensional transesophageal echocardiography (3DTEE) in the evaluation of eccentric MR identifying geometric differences in the vena contracta area between functional and degenerative etiologies. METHODS AND RESULTS: We studied 61 patients with eccentric MR (30 functional and 31 degenerative). Regurgitant orifice area was determined by the two-dimensional proximal isovelocity surface area (2DPISA) and the 3DTEE methods. The ratio between maximum and minimum lengths of the vena contracta was calculated in each patient. Effective regurgitant orifice area by the 2DPISA method was smaller than that estimated by 3DTEE (0.56±0.21 vs 0.72±0.25 cm2 ). A better correlation between both methods was seen in degenerative mitral regurgitation (DMR; r=.83), with a mean underestimation of 8.2% by the 2DPISA method. A much worse correlation was found in functional mitral regurgitation (FMR; r=.39), where a mean underestimation by the 2DPISA method of 29.1% was observed. There was a more elongated and curved vena contracta in FMR compared to that in DMR (length ratio: 3.4±1.0 vs 2.2±0.7, P<.0001). CONCLUSION: Three-dimensional transesophageal echocardiography identifies a more elongated regurgitant orifice in eccentric FMR compared to that in eccentric DMR. This difference may explain the greater underestimation of effective regurgitant orifice area by the 2DPISA method in FMR. High-quality 3DTEE analysis of vena contracta area would be a highly recommended alternative.

Usefulness of 3D echocardiographic parameters of tricuspid valve morphology to predict residual tricuspid regurgitation after tricuspid annuloplasty.

AIMS: Tricuspid valve (TV) annuloplasty is an effective treatment for tricuspid regurgitation (TR). However, the impact of TV morphology on outcome of TV annuloplasty remains unknown. We sought to investigate the relationship between preoperative TV morphology and residual TR after annuloplasty. METHODS AND RESULTS: Two-dimensional transthoracic and three-dimensional (3D) transesophageal echocardiography were performed in 97 patients with functional TR before and after surgery. 3D quantitative assessment including annular dimension, tenting height and volume, and lengths and tethering angles of the 3 leaflets was performed. The TV morphological score was derived from the preoperative 3D echocardiography to score a leaflet mobility, leaflet thickening, subvalvular thickening, and calcification. TR severity was determined by the averaged vena contracta measured from the apical and parasternal inflow views. Multivariable analysis revealed that a shorter total leaflet length (P = 0.007), larger tenting volume (P < 0.001), and higher TV morphological score (P < 0.001) were independently associated with residual TR. A TV-Echo score was determined as a sum of points based on receiver operator characteristics analysis: total leaflet length >61.0 mm, 61.0 to 53.5 mm, and <53.5 mm; tenting volume <2.3 mL, 2.3 to 3.5 mL, and >3.5 mL; and TV morphological score <7, 7 to 18, and >18; each variable was associated with 0 and 1 point and 2 points, respectively. The TV-Echo score ≥2 was associated with significant residual TR with a sensitivity of 85.7% and a specificity of 71.0%. CONCLUSION: In addition to tethering and short length of the leaflets, TV morphological abnormality predicted residual TR after TV annuloplasty.

Evaluation of vegetation size and its relationship with septic pulmonary embolism in tricuspid valve infective endocarditis: A real time 3DTEE study.

BACKGROUND: Tricuspid valve infective endocarditis (TVIE) causes septic pulmonary embolism (PE). However, the impact of vegetation size on PE is not fully elucidated. METHODS: In 26 consecutive patients with definite TVIE according to Duke criteria, we tested clinical, microbiological, and echocardiographic data including real time three-dimensional transesophageal echocardiography (3DTEE) as potential predictors of PE. 3DTEE measurement of maximum length of vegetation (MLV) was obtained with Advanced QLAB Quantification Software by cropping the 3D volume with the appropriate 2D plane to obtain the largest value. The standard two-dimensional transesophageal echocardiography (2DTEE) images were also evaluated to determine the MLV. RESULTS: Pulmonary embolism occurred after TVIE diagnosis with 3DTEE assessment and initiation of antibiotic therapy in 12 patients (46.2%). The 3DTEE MLV was larger than the 2DTEE value with a mean difference of 3.6 mm (95% CI, 2.5-4.6 mm). The best cutoff value for prediction of PE was MLV ≥16.4 mm with 3DTEE and MLV ≥9.5 mm with 2DTEE. The positive predictive value increased from 76.9% to 90% when 3DTEE was used. The accuracy of classification of patients with PE increased from 80.6% to 84.9% with 3DTEE. On multivariate analysis, 3DTEE MLV ≥16.4 mm (odds ratio 20.5; 95% confidence interval 1.31-322; P=.031) was independently associated with the occurrence of PE after adjustment for age, sex, complex vegetation, and the number of vegetation-attached leaflets. CONCLUSIONS: In TVIE, vegetation length is a strong predictor of the occurrence of PE. In combination with 2DTEE, 3DTEE may identify high-risk patients who will need a more aggressive therapeutic strategy.

Impact of Mitral Annular Displacement on Left Ventricular Diastolic Function Improvement After Transcatheter Aortic Valve Implantation.

BACKGROUND: The clinical significance of left ventricular (LV) diastolic function (DF) improvement after transcatheter aortic valve implantation (TAVI) is not fully elucidated. We sought to investigate the long-term clinical and hemodynamic effects of post-TAVI DF improvement and to identify its determinants.Methods and Results:Clinical and serial echocardiographic data before and after TAVI were retrospectively reviewed together with measurement of mitral annular displacement (MAD) representing longitudinal myocardial function in 98 patients with severe aortic stenosis and ejection fraction >55%. DF grade was determined as 0-III according to the current guideline. Patients with ≥1-grade improvement in DF at 1 year (n=59, 60%) showed a better recovery of New York Heart Association functional class, plasma B-type natriuretic peptide level, stroke volume index, and averaged e', and a greater decrease in systolic pulmonary artery pressure than those without DF improvement (all P<0.05). Coronary artery disease (odds ratio (OR), 0.30; 95% confidence interval (CI), 0.11-0.84; P=0.022) and averaged MAD (per 2.5 mm increase; OR, 4.11; 95% CI, 2.18-7.72; P<0.001) were predictors of post-TAVI DF improvement. An averaged MAD cutoff value of 10.7 mm discriminated cases of improvement with a sensitivity of 88% and specificity of 64%. CONCLUSIONS: Post-TAVI DF improvement may be associated with preserved LV longitudinal function and when present may be accompanied by more favorable clinical and hemodynamic changes.

Functional Tricuspid Regurgitation Caused by Chronic Atrial Fibrillation: A Real-Time 3-Dimensional Transesophageal Echocardiography Study.

BACKGROUND: Functional tricuspid regurgitation (TR) with a structurally normal tricuspid valve (TV) may occur secondary to chronic atrial fibrillation (AF). However, the clinical and echocardiographic differences according to functional TR subtypes are unclear. Therefore, characterization of functional TR because of chronic AF (AF-TR) remains undetermined. METHODS AND RESULTS: To investigate the prevalence of AF-TR, 437 patients with moderate to severe TR underwent 3-dimensional (3D) transesophageal echocardiography. TR severity was determined by the averaged vena contracta width on apical and parasternal inflow views. The prevalence of AF-TR was 9.2%, whereas that of functional TR because of left-sided heart disease was 45.3%. Clinical features of AF-TR included advanced age, female sex, greater right atrial than left atrial enlargement and lower systolic pulmonary artery pressure compared with left-sided heart disease-TR with sinus rhythm (all P<0.05). In 3D TV assessment, patients with AF-TR had a larger TV annular area with weaker annular contraction (both P<0.001) but a smaller tethering angle (P<0.001) despite a similar leaflet coaptation status compared with patients with left-sided heart disease-TR with sinus rhythm. On multivariable analysis, only the TV annular area in midsystole (coefficient, 0.059; 95% confidence interval, 0.041-0.078 per 100 mm2; P<0.001) was associated with TR severity in AF-TR. The annular area was more closely correlated with the right atrial volume than right ventricular end-systolic volume in AF-TR (P<0.001). CONCLUSIONS: AF-TR is not rare and is associated with advanced age and right atrial enlargement. TV deformations and their association with right heart remodeling differ between AF-TR and left-sided heart disease-TR. Our results suggest that in patients with TR secondary to AF, TV annuloplasty should be effective because this entity has annular dilatation without leaflet deformation.

Geometric changes in ventriculoaortic complex after transcatheter aortic valve replacement and its association with post-procedural prosthesis-patient mismatch: an intraprocedural 3D-TEE study.

AIMS: Prosthesis-patient mismatch (PPM) after transcatheter aortic valve replacement (TAVR) leads to increased mortality. However, its peri-procedural determinants remain unknown. We investigated geometric changes in aortic annulus (AoA) and left ventricular outflow tract (LVOT) during TAVR by three-dimensional transoesophageal echocardiography (3D-TEE) and its association with post-procedural PPM. METHODS AND RESULTS: A total of 131 patients with severe aortic stenosis underwent intraprocedural 3D-TEE during balloon-expandable TAVR. The severity of PPM was graded using the indexed effective orifice area calculated by Doppler echocardiography at discharge, with moderate defined as ≥0.65 and ≤0.85 cm2/m2 and severe defined as <0.65 cm2/m2. 3D planimetered AoA area decreased after TAVR (P< 0.001), whereas the LVOT increased (P= 0.004). The eccentricity of both AoA and LVOT decreased after TAVR (both, P< 0.001). At discharge, the incidence of overall and severe PPM was 44 and 12%, respectively. Patients with PPM had a larger body surface area, smaller aortic valve area, and less frequent balloon dilation (all P< 0.05). Patients with PPM had a lower post-TAVR AoA area/pre-TAVR AoA area (91 ± 8 vs. 95 ± 7%, P= 0.001) than those without PPM. The post-TAVR AoA area/pre-TAVR AoA area was independently associated with overall PPM (odds ratio, 1.80; 95% CI, 1.06-3.05; P= 0.031) and severe PPM (odds ratio, 2.50; 95% CI, 1.05-5.36; P= 0.04). Additionally, a cut-off value of this ratio >86.3% had a sensitivity of 84% and a specificity of 44% for the prevention of severe PPM. CONCLUSION: 3D-TEE can evaluate geometric changes in AoA and LVOT during balloon-expandable TAVR and predicts post-procedural PPM.

Outcome of paravalvular leak repair after transcatheter aortic valve replacement with a balloon-expandable prosthesis.

BACKGROUND: Significant paravalvular leak (PVL) occurs in up to 13% of patients after transcatheter aortic valve replacement (TAVR) with a balloon-expandable bioprosthesis. Transcatheter PVL repair has emerged as a less invasive alternative for this problem. OBJECTIVES: The aim of this study was to evaluate the safety, feasibility, and clinical outcomes of transcatheter PVL repair after TAVR with balloon-expandable valve. METHODS: We retrospectively identified 15 patients who underwent 16 PVL repair procedures after the TAVR at our center. Procedural characteristics, results, and clinical outcomes were analyzed. The association of PVL repairs with subsequent hospitalizations and mortality was assessed and compared to 57 patients who did not undergo repair for at least moderate PVL after TAVR. RESULTS: The PVL repair was successful in 13 (87%) patients, without significant procedure or device related complications. In patients with successful PVL repair, there was an improvement in symptom status, subsequent hospitalizations, and B-type natriuretic peptide levels. There was 1 (out of 13, 8%) death in the group of patients who successfully underwent PVL repair whereas 24 (out of 57, 42%) patients died during follow up in the group that did not undergo repair of their PVL. Similarly, there was significant reduction in the subsequent heart failure related hospitalization after the PVL repair, compared with the patients who did not undergo PVL repair (P = 0.03). CONCLUSION: Transcatheter repair of PVL after TAVR can be safely and effectively accomplished in carefully selected patients, and may lead to reduction in hospitalizations, improvement in symptoms, and long-term survival. © 2016 Wiley Periodicals, Inc.

Distant Position of Chordae from Coaptation Causes Mitral Regurgitation in Patients with Atrial Fibrillation.

BACKGROUND: The study aim was to investigate the mechanism of mitral regurgitation (MR) in lone atrial fibrillation (AF) patients using three-dimensional (3D) transesophageal echocardiography (TEE). METHODS: A retrospective analysis was conducted of 64 patients with AF and a normal left ventricle, and without prolapse of the mitral valve. Among these patients, significant MR was not identified in 33 cases (AF+MR- group) but was present in 31 cases (AF+MR+ group). The distance from the coaptation to the bending point of the anterior mitral leaflet (AML), where the chorda was attached, was termed the 'bending length'. The ratio of the bending length to the distance from coaptation to anterior mitral annulus was termed the 'bending ratio' (= bending length/coaptation-annulus length). The mitral annular area (MAA) fractional change was defined as follows: (MAA at late systole - MAA at early systole)/MAA at late systole × 100%). Other parameters relating to mitral valve morphology obtained using 3D TEE were measured with commercial software (QLAB, Phillips). RESULTS: The coaptation length (CL) was smaller in the AF+MR+ group than in the AF+MR- group (p<0.001), and correlated significantly with the anteriorposterior diameter of the mitral annulus (R = 0.286, p = -0.022), MAA at mid-systole (R = -0.269, p = 0.032), MAA fractional change (R = 0.434, p <0.001), and the bending ratio (R = -0.603, p <0.001). With a multivariable analysis, the correlating factors of significant MR in lone AF patients were a decrease in MAA fractional change (p = 0.022) and an increase of the bending ratio (p = 0.009). CONCLUSIONS: Small MAA fractional changes and the distant position of the chordae tendineae on the AML from the coaptation correlated with significant MR in AF patients with normal left ventricular systolic function.

3D Assessment of Features Associated With Transvalvular Aortic Regurgitation After TAVR: A Real-Time 3D TEE Study.

OBJECTIVES: This study of 3-dimensional (3D) transesophageal echocardiography (TEE) aimed to demonstrate features associated with transvalvular aortic regurgitation (AR) after transcatheter aortic valve replacement (TAVR) and to confirm the fact that a gap between the native aortic annulus and prosthesis is associated with paravalvular AR. BACKGROUND: The mechanism of AR after TAVR, particularly that of transvalvular AR, has not been evaluated adequately. METHODS: All patients with severe aortic stenosis who underwent TAVR with the Sapien device (Edwards Lifesciences, Irvine, California) had 3D TEE of the pre-procedural native aortic annulus and the post-procedural prosthetic valve. RESULTS: In the 201 patients studied, the total AR was mild in 67 patients (33%), moderate in 21 patients (10%), and severe in no patients. There were 20 patients with transvalvular AR and 82 patients with paravalvular AR. Fourteen patients had both transvalvular and paravalvular AR. Patients with transvalvular AR had larger prosthetic expansion (p <0.05), a more elliptical prosthetic shape at the prosthetic commissure level (p <0.01) and more anti-anatomical position (p <0.001), which was defined as malposition of the prosthetic commissures in relation to the native commissures, than the patients without transvalvular AR. Age (odds ratio [OR]: 1.05; 95% confidence interval [CI]: 1.01 to 1.09; p < 0.05) and effective area oversizing (OR: 0.97; 95% CI: 0.93 to 0.99, p <0.05) were associated with mild or greater paravalvular AR. CONCLUSIONS: 3D TEE successfully demonstrated the features associated with transvalvular AR, such as large prosthetic expansion, elliptical prosthetic shape, and anti-anatomical position of prosthesis. Additionally, effective area oversizing was associated with paravalvular AR.

Assessment of Post-Procedural Aortic Regurgitation After TAVR: An Intraprocedural TEE Study.

OBJECTIVES: The purpose of this study was to determine which echocardiographic parameters, including holodiastolic flow reversal (HDFR) in the descending aorta, were useful for grading of post-procedural aortic regurgitation (PAR) after transcatheter aortic valve replacement (TAVR) using intraprocedural transesophageal echocardiography. BACKGROUND: Reliable assessment of PAR in a catheterization laboratory is essential for an optimal outcome after TAVR; however, such an assessment has not been determined. METHODS: Three hundred eighty patients who underwent TAVR with the Edwards (Irvine, California) balloon-expandable transcatheter heart valve were retrospectively assessed by intraprocedural transesophageal echocardiography. PAR was evaluated by 2-dimensional color Doppler and pulse-wave Doppler in the descending aorta. Using 2-dimensional color Doppler, we measured the cross-sectional area of the vena contracta, the circumferential extent at the aortic annular plane, the longitudinal jet length, and the jet extent (with a mosaic pattern in the left ventricular outflow tract) compared with the location of the tip of the anterior mitral leaflet (AML). Grading of PAR was determined using the following vena contracta cutoffs: mild ≤9 mm(2); moderate 10 to 29 mm(2); and severe ≥30 mm(2). Significant PAR was defined as at least moderate grade. RESULTS: All patients with consistent HDFR had significant PAR. By multivariable analysis, consistent HDFR and the jet extent beyond the tip of AML were independent predictors of significant PAR. Consistent HDFR and jet extent beyond the tip of AML predicted significant PAR with specificities of 100% and 97%, respectively. In contrast, patients with both negative HDFR and a jet extent of less than halfway to the tip of AML had no significant PAR, with 97% specificity. CONCLUSIONS: The presence of consistent HDFR and jet extent beyond the tip of AML are indicative of significant PAR after TAVR.

Significant Reduction in Mitral Regurgitation Volume Is the Main Contributor for Increase in Systolic Forward Flow in Patients with Functional Mitral Regurgitation after Transcatheter Aortic Valve Replacement: Hemodynamic Analysis Using Echocardiography.

BACKGROUND: Reduction in mitral regurgitation (MR) after transcatheter aortic valve replacement (TAVR) has previously been reported. However, the hemodynamic effects of TAVR in patients with MR have not been previously evaluated. METHODS: We analyzed 571 patients who underwent TAVR from December 2010 to December 2013. We studied 20 patients with moderate or severe preprocedural functional mitral regurgitation (FMR) who also had a follow-up transthoracic echocardiography (TTE) examination between 90 and 360 days (median 213 days) after TAVR (Significant FMR Group). We also studied age- and gender-matched 20 patients with mild or lesser MR (Nonsignificant MR Group). Left ventricular functional measurements were assessed using echocardiography before and after TAVR. Left ventricular outflow tract stroke volume measurements using pulsed-wave Doppler (SVLVOT ) were calculated as a representative of systolic forward flow, and stroke volume by the Simpson's method (SVSimpson ) was calculated as a parameter of degree of LV contraction. RESULTS: MR grade improved in 22 of 40 patients after TAVR. In both groups, BNP level decreased, left ventricular ejection fraction increased, and SVLVOT increased after TAVR. SVSimpson increased in the Nonsignificant MR Group and remained unchanged in the Significant FMR Group. Vena contracta width of MR (MRVC) decreased in the Significant FMR Group. Using multivariable analysis in the Significant FMR Group, the increase in SVLVOT significantly correlated with the decrease in MRVC (P < 0.05). CONCLUSIONS: SVLVOT increased significantly after TAVR in patients with FMR. In these patients, increase in SVLVOT after TAVR was associated with decrease in severity of MR.

Impact of device landing zone calcification on paravalvular regurgitation after transcatheter aortic valve replacement: a real-time three-dimensional transesophageal echocardiographic study.

BACKGROUND: Determinants of paravalvular regurgitation after transcatheter aortic valve replacement (TAVR) remain unclear. The purpose of this study was to investigate the impact of aortic valve calcification (AVC) on paravalvular regurgitation after TAVR using real-time three-dimensional transesophageal echocardiography. METHODS: A total of 227 patients with severe aortic stenosis who underwent TAVR using the Edwards SAPIEN or SAPIEN XT valve were retrospectively analyzed. Severity of AVC was assessed on a visual scale ranging from 0 to 3 at the aortic annulus, the leaflets near the nadir, and the commissure. The shape of calcification was assessed by measuring the radial and circumferential lengths of annular calcification and by focusing on the calcification protruding into the left ventricular outflow tract from the annular level. Severity of paravalvular regurgitation was determined by the sum of the cross-sectional area of the vena contracta from two-dimensional or three-dimensional color Doppler transesophageal echocardiographic data. Significant paravalvular regurgitation was defined as at least a moderate grade. RESULTS: After excluding 25 patients with inadequate image quality of three-dimensional and color Doppler data for analysis, AVC could be evaluated in 202 patients. Significant paravalvular regurgitation was occurred in 37 patients (18%). The sum of the AVC scale at the annulus was significantly correlated with the grade of paravalvular regurgitation, while those at the leaflets near the nadir and the commissure were not. As assessed by receiver operating characteristic curve analysis, the radial and circumferential length of the annular calcification had good discriminatory ability for significant paravalvular regurgitation, with areas under the curve of 0.91 and 0.81, respectively. On multivariate analysis, annular calcification with radial length ≥ 3.0 mm, circumferential length ≥ 8.0 mm, and calcification protruding into the left ventricular outflow tract were independently associated with significant paravalvular regurgitation. CONCLUSIONS: Assessment of AVC by real-time three-dimensional transesophageal echocardiography is feasible and has good discriminatory value for paravalvular regurgitation in patients who undergo TAVR. Significant paravalvular regurgitation after TAVR is associated with the location and size of calcification at the aortic annulus and left ventricular outflow tract, not with its severity.

Device landing zone calcification predicts significant paravalvular regurgitation after transcatheter aortic valve replacement: a real time three-dimensional transesophageal echocardiography study.

Paravalvular regurgitation (PVR) after transcatheter aortic valve replacement (TAVR) is one of the major complications with negative clinical prognosis. Therefore, its prediction is important for further improvement of the outcome. We present a case with TAVR, in which we successfully evaluated aortic valve calcification protruding inward and into the left ventricular outflow tract by real time three-dimensional transesophageal echocardiography, and predicted significant PVR after the procedure. In conclusion, device landing zone calcification protruding inward is a key for the prediction of significant PVR after TAVR.

A revised methodology for aortic-valvar complex calcium quantification for transcatheter aortic valve implantation.

AIMS: We sought to optimize a method for quantification of the calcium in the aortic-valvar complex for the prediction of significant paravalvular leak (PVL) after transcatheter aortic valve implantation (TAVI). METHODS AND RESULTS: All patients had severe symptomatic aortic stenosis and were treated with balloon-expandable TAVI (Sapien/Sapien-XT, Edwards Lifesciences LLC, Irvine, CA, USA). In order to correct for precise annular sizing, only patients with available contrast computed tomography (CT) data for measurements were included (n = 198). Paravalvular leak was quantified using peri-procedural transoesophageal echocardiography by Valve Academic Research Consortium-2 (VARC-2) criteria (grade ≥ moderate was considered significant). A detailed region-of-interest methodology separated quantification of calcium in each of the aortic leaflets to that in the left ventricular outflow tract (LVOT) and was used to predict PVL in receiver operator characteristic curve analyses. For non-contrast scans, the greatest discriminatory value for PVL was seen at the 450 Hounsfield Unit (HU) threshold for detection (volume ≥626 mm(3)), whereas for contrast scans it was at 850 HU (≥235 mm(3)). Left ventricular outflow tract calcium predicted PVL but only as a binary variable with no incremental value of quantification. In a multivariable binary logistic regression model, annulus area ≥ prosthesis area (OR 3.5, 95% CI 1.5-8.2, P = 0.005), contrast leaflet calcium volume (850-HU threshold) ≥235 mm(3) (OR 2.8, 95% CI 1.2-6.7, P = 0.023), and presence of LVOT calcium (OR 2.8, 95% CI 1.2-7.0, P = 0.022) were independent predictors for PVL ≥ moderate. CONCLUSION: Both leaflet and LVOT calcium are significant predictors of PVL and exert an important synergistic influence on this complication, even in appropriately sized valves. With careful attention to thresholds for detection, clinically relevant leaflet calcium volumes can be identified with either non-contrast or contrast CT scans.

Comparison of aortic root geometry with bicuspid versus tricuspid aortic valve: real-time three-dimensional transesophageal echocardiographic study.

BACKGROUND: An understanding of aortic root anatomy in bicuspid aortic valve (BAV) has not been well established. The aims of this three-dimensional transesophageal echocardiographic study were (1) to examine whether aortic root geometry differs between BAV and tricuspid aortic valve (TAV) and (2) to analyze the dynamic motion of the aortic annulus throughout cardiac cycle. METHODS: A total of 66 patients with BAV (38 with severe aortic stenosis [AS]) and 66 age-, gender-, and body surface area-matched patients with TAV (36 with severe AS) who underwent three-dimensional transesophageal echocardiography were retrospectively enrolled. The dynamic motion of the aortic annulus was also analyzed in 40 selected patients (10 with BAV with severe AS, 10 with BAV without AS, 10 with TAV with severe AS, and 10 with TAV without AS). RESULTS: The area of the aortic root in patients with BAV was larger than in those with TAV (aortic annulus, P < .001; sinus of Valsalva, P < .05; sinotubular junction, P < .01). There was a significant difference in circularity (4π × area/[perimeter](2)) of the sinus of Valsalva between patients with BAV and those with TAV (P < .001), although there were no differences in the shapes of the aortic annulus and the sinotubular junction between the two groups. In both patients with BAV and those with TAV, the aortic annulus in mid-systole was largest and most circular in cardiac cycle; on the other hand, in end-diastole, the aortic annulus was smallest and most elliptical (P < .001). CONCLUSIONS: Three-dimensional transesophageal echocardiography successfully demonstrated significant differences in the size of the aortic root and the shape of the sinus of Valsalva between patients with BAV and those with TAV.