Mitral Stenosis Patients Research Articles

Prognostic value of right ventricular-pulmonary arterial coupling indices in patients with moderate to severe mitral stenosis

Abstract Background Right ventricular-pulmonary arterial (RV-PA) coupling represents the relationship of RV contractility and RV afterload. The ability of RV to adapt to changes in RV afterload (i.e. increased pulmonary arterial (PA) loading) has prognostic implications in various cardiovascular diseases such as heart failure and pulmonary arterial hypertension. RV-PA uncoupling occurs when RV contractility cannot match RV afterload, resulting in right heart dysfunction. However, RV-PA coupling has not been investigated in mitral stenosis patients. Purpose To evaluate the prognostic significance of various non-invasive RV-PA coupling parameters (TAPSE/PASP and RVFWLS/PASP) in patients with moderate to severe mitral stenosis. Methods This was a single-center retrospective study of 237 patients with moderate or severe mitral stenosis enrolled between January 2010 to December 2022. Baseline clinical and echocardiographic parameters were collected. RV free wall longitudinal strain (RVFWLS) was subsequently analyzed using TOMTEC software. Echocardiography-derived RV-PA coupling parameters were collected, including TAPSE/PASP and RVFWLS/PASP. The primary endpoint was a composite outcome of all-cause mortality, heart failure hospitalization and valve intervention (percutaneous transvenous mitral commissurotomy and surgical intervention). RV parameters were analyzed separately to avoid collinearity. Results A total of 237 patients were included in the study. The patients had a mean age was 66.56 ± 13.61 years-old and were predominantly female (67.9%). The median follow-up duration was 4.54 years (IQR 1.44 – 6.44). Mean left ventricular ejection fraction (LVEF) was 56.86 ± 10.51%, mean TAPSE 18.29 ± 5.36 mm and mean RVFWLS was -23.60 ± 7.96 %. In separate multivariable Cox regression models after adjustment for age , sex and mitral stenosis severity, TAPSE/PASP ratio < 0.36mm/mmHg (HR 2.025 , 95% CI 1.395-2.939, p < 0.001 ) and RVFWLS/PASP ratio ≥ - 0.5%/mm Hg (HR 2.031 95% CI 1.404 – 2.938 , p< 0.001) remained independently associated with mortality , heart failure hospitalization and valve intervention. Conclusion TAPSE/PASP and RVFWLS/PASP were independently associated with all-cause mortality, heart failure hospitalization and valve intervention in patients with moderate to severe mitral stenosis.

Prognostic value of left atrial strain in patients with moderate to severe mitral stenosis

Abstract Background Mitral stenosis causes an inflow restriction during diastole and is characterized by an increase in left atrial (LA) pressure with reduced cardiac output. Pressure overload of the LA can lead to atrial fibrosis and remodeling, resulting in a loss of LA reservoir and compliance capacity that can lead to backward load on the pulmonary circulation. To date, there are limited studies evaluating the impact of LA strain on prognosis of mitral stenosis patients. Purpose The aim of this study was to assess the prognostic value of LA strain in patients with moderate to severe mitral stenosis using two-dimensional (2D) strain imaging. Methods This was a single-center retrospective study, 237 patients with moderate or severe mitral stenosis were enrolled from January 2010 to December 2022. Baseline clinical and echocardiographic parameters were collected, LA strain measurements with reference time point at end diastole for reservoir strain (LASr), conduit strain (LAScd) and contraction strain (LASct) were analyzed using TOMTEC software. The endpoint was a composite outcome of all-cause mortality, heart failure hospitalization and valve intervention (percutaneous transvenous mitral commissurotomy and surgical intervention). All the LA parameters were analyzed separately to avoid collinearity. Results A total of 237 patients were included in the study. The patients had a mean age was 66.56 ± 13.61 years-old and were predominantly female (67.9%) with median follow up duration is 4.54 years (IQR 1.44 – 6.44). Mean left ventricular ejection fraction (LVEF) was 56.86 ± 10.51%, mean left atrium volume index (LAVI) was 73.94 ± 55.46 ml/m2, mean for LASr, LAScd and LASct were 11.81 ± 8.89%, -6.19 ± 4.50%, and -5.58 ± 6.05% respectively. LASr with a cut-off < 15.8% was independently associated with the composite outcome of all-cause mortality, heart failure hospitalization and valve intervention on multivariable Cox regression analysis (HR 2.51, 95% CI 1.54 - 4.10, p < 0.001). LAScd, LASct and LA volume index did not demonstrate any significant association with the endpoint. Conclusion LASr was independently associated with all-cause mortality, heart failure hospitalization and valve intervention in patients with moderate to severe mitral stenosis.

Evaluation of right ventricular mechanics using exercise echocardiography in asymptomatic patients with severe mitral stenosis.

We aimed to evaluate the effect of exercise echocardiography (EE) on Right ventricular (RV) deformation parameters in asymptomatic patients with severe rheumatic mitral stenosis (MS) (mitral valve area ≤ 1.5 cm2, stage C) and to determine the relation between symptoms and severity of MS. 38 rheumatic MS patients in stage C underwent EE. 20 Patients were defined; as an exercise intolerance group who couldn't reach a maximum heart rate according to their age during exercise due to developing dyspnea The remaining 18 patients who reached a maximum heart rate without dyspnea were defined; as an exercise tolerance group. RV echocardiographic parameters at baseline and peak exercise were compared between the groups. While RV global strain (RV GLS) (21.02 ± 3.33 vs. 21.92 ± 3.03) and RV free wall longitudinal strain (RV FWLS) (23.41 ± 5.66 vs. 25.08 ± 5.00) at baseline were similar in both groups (P = 0.390 P = 0.343), RV GLS (23.38 ± 4.30 vs. 26.05 ± 3.24) and RV FWLS (24.24 ± 5.78 vs. 28.05 ± 4.62) at peak exercise were reduced in exercise intolerance group (P = 0.040 P = 0.033). The best correlations were found between exercise capacity and RV FWLS at baseline and peak exercise in all MS patients (respectively; r = 0.627 P < 0.001; r = 0.697 P < 0.001). RV mechanics has approved the reliability of EE in patients with asymptomatic patients with severe MS. During exercise RV contractile reserve could diminish in MS patients with stage C who develop dyspnea. Moreover, since our study has a close relationship between exercise capacity and RV mechanics, using RV mechanics during exercise echocardiography may be useful for risk stratification in MS patients with severe MS.

Clinical characteristics of patients with moderate or severe valvular heart disease

Objective: To describe the characteristics, etiology and patterns of outpatients and inpatients patients with moderate or severe valvular heart disease (VHD). Methods: This is a cross-sectional study. Outpatients and inpatients with moderate or severe VHD who underwent transthoracic echocardiography for first examination from 1st January 2001 to 1st January 2020 in Southwest Hospital, Army Medical University were enrolled. Data were collected from medical records and big data platform of Southwest Hospital. Characteristics of age and gender, etiology and types of VHD were descriptively analysed. Results: A total of 68 354 patients with moderate or severe VHD were enrolled. The age was 63 (50, 72) years. And 35 706 (52.24%) patients were female. (1) Age characteristics: There was similar age trend between male and female patients with moderate or severe VHD. The number of patients increased firstly and then decreased and reached its peak in the age group of 65-69 years old. The peak age of mitral stenosis patients was 45-49 years, which was earlier than that of whole patients with moderate or severe VHD. The median age of patients with bicuspid aortic valve was 42 years. (2) Gender characteristics: The proportion of tricuspid regurgitation, pulmonary regurgitation, mitral regurgitation, mitral stenosis and valve surgery in female patients with moderate or severe VHD were higher than those in male patients. The proportion of aortic regurgitation, aortic stenosis and bicuspid aortic valve in male patients with moderate or severe VHD were significantly higher than those in female patients (all P<0.05). (3) Etiology: The proportion of rheumatic VHD was 13.07% (8 934/68 354), which was higher than that of degenerative VHD (0.67% (458/68 354)). (4) Types of VHD: Tricuspid regurgitation made contribution to the largest proportion with 60.72% (41 503/68 354), followed by mitral regurgitation, aortic regurgitation, mitral stenosis, pulmonary regurgitation and aortic stenosis. Conclusions: There are certain regional characteristics in the prevalence of moderate or severe VHD in southwest China, suggesting different attention should be paid on the whole process of refined management of moderate or severe VHD.

Influence of Right Atrial Pressure on the Prognosis of Patients with Rheumatic Mitral Stenosis Undergoing Percutaneous Mitral Balloon Valvuloplasty.

Pulmonary hypertension (PH) often complicates mitral stenosis (MS). The prognostic impact of pulmonary vascular resistance (PVR) in MS patients remains unclear. Previous study has demonstrated the prognostic impact of right atrial pressure (RAP) in patients with primary PH. We aim to determine the prognostic impact of PVR and RAP in patients with rheumatic MS undergoing percutaneous mitral balloon valvuloplasty (PMBV). A total of 58 patients with symptomatic severe rheumatic MS who underwent PMBV between 2016 and 2020 were included. Patients were divided into two groups: PVR ≤ 2WU (N = 26) and PVR > 2WU (N = 32). The composite endpoint included death, reintervention or persistent NYHA functional class III-IV during follow-up. The median age was 50 (42-60) years, with 82.8% being female. Median pulmonary artery systolic pressure (PASP) was 42 (35-50.5) mmHg. Patients with PVR ≤ 2WU had lower PASP on both echocardiogram and catheterization. The PMBV success rate was 75.9%. Multivariate analysis, adjusted for PVR, showed RAP as the only independent predictor of the composite endpoint (HR:1.507, 95% CI:1.015-2.237, p = 0.042). The optimal RAP cutoff was 9.5 mmHg (HR:3.481, 95% CI:1.041-11.641; p = 0.043). RAP was an independent predictor of adverse outcomes in patients with rheumatic MS undergoing PMBV, while PVR did not show prognostic significance. These findings suggest that the prognostic value of PVR may be lower than expected.

Left atrial strain by cardiac MRI feature tracking in mitral stenosis before and after balloon valvuloplasty.

The aim was to investigate LA strain by feature tracking cardiac MRI in mitral stenosis (MS) patients before and after percutaneous balloon mitral valvuloplasty (PBMV). Patients underwent cardiac MRI before and after successful PBMV (n = 18). Mitral valve area, transmitral velocity and gradients, LA volumes and ejection fraction (LAEF) were measured. LA strain feature tracking analysis was used to calculate LA reservoir, conduit, and booster strain. LA strain, LA volumes, LAEF and mitral valve severity indices were compared before and after PBMV. Correlations between LA strain and other cardiac MRI parameters were assessed. After PBMV, mitral valve area increased from 1.18 ± 0.25 cm2 to 2.26 ± 0.27 cm2, p < 0.001. Transmitral peak velocity decreased from 1.7 ± 0.37m/s to 1.3 ± 0.27m/s, p < 0.001. Transmitral peak gradient decreased from 12.4 ± 4.8 mmHg to 6.8 ± 2.9 mmHg, p < 0.001, and mean gradient decreased from 6.9 ± 3.8 mmHg to 2.9 ± 1.4 mmHg, p < 0.001. Maximal LA volume decreased from 73.1 ± 14.2 ml/m2 to 62.7 ± 16.3 ml/m2, p = 0.018; corrected p value = 0.054. LAEF increased from 36.3 ± 8.7% to 44.4 ± 9.5%, p = 0.010. Reservoir strain increased from 11.7 ± 3.1% to 14.9 ± 3.6% after PBMV, p = 0.009, and conduit strain from 3.8 ± 2% to 6 ± 2.3%, p = 0.005. Booster strain insignificantly increased after PBMV. Cardiac MRI feature tracking provides information on the 3 LA functional phases. Significant improvement was observed in reservoir and conduit functions after successful PBMV.

Predictors and clinical outcomes of true mitral stenosis in patients undergoing transcatheter aortic valve implantation.

Predictors of true degenerative mitral stenosis (MS) in patients with aortic stenosis who underwent transcatheter aortic valve implantation (TAVI) remain unknown. This study aimed to investigate the predictors and prognostic value of true degenerative MS in this population. We retrospectively reviewed the records of 760 consecutive patients who underwent TAVI. The mitral valve area (MVA) was assessed using transthoracic echocardiography, and mitral valve calcification was assessed using multi-detector computed tomography. MS was defined as an MVA of ≤2.0 cm², and true MS was defined as moderate or severe MS following TAVI. In our TAVI cohort, we identified 72 (9.5%) patients with degenerative MS. Among these, true MS was observed in 38 (52.7%) patients. Echocardiographic data showed that the true MS group had a significantly lower MVA and higher trans-mitral gradient. The severity of mitral annular calcification was not significantly different between the two groups; however, the true MS group had significantly more posterior mitral leaflet and anterior mitral leaflet (AML) calcification. Multivariable logistic regression analysis showed that AML calcification was the independent predictor of true MS [adjusted odds ratio, 9.23; 95% confidence interval (CI) 2.84-29.9]. True MS was independently associated with poor prognosis (adjusted hazard ratio, 2.76; 95% CI 1.09-6.98). Approximately half of the patients with concomitant degenerative MS who underwent TAVI had true MS, which was associated with a poor prognosis. Computed tomographic analysis of AML calcification was useful for predicting true MS.

The effects of mitral stenosis on right ventricular mechanics assessed by three-dimensional echocardiography

Mitral stenosis (MS) is a complex valvular pathology with significant clinical burden even today. Its effect on the right heart is often overlooked, despite it playing a considerable part in the symptomatic status. We enrolled 39 mitral valve stenosis patients and 39 age- and gender-matched healthy controls. They underwent conventional, speckle-tracking and 3D echocardiographic examinations. The 3D data was analyzed using the ReVISION software to calculate RV functional parameters. In the MS group, 3D RV ejection fraction (EF) (49 ± 7% vs. 61 ± 4%; p < 0.001), global circumferential (GCS) (− 21.08 ± 5.64% vs. − 25.07 ± 4.72%; p = 0.001) and longitudinal strain (GLS) (− 16.60% ± 4.07% vs. − 23.32 ± 2.82%; p < 0.001) were reduced. When comparing RV contraction patterns between controls, MS patients in sinus rhythm and those with atrial fibrillation, radial (REF) (32.06 ± 5.33% vs. 23.62 ± 7.95% vs. 20.89 ± 6.92%; p < 0.001) and longitudinal ejection fraction (LEF) (24.85 ± 4.06%; 17.82 ± 6.16% vs. 15.91 ± 4.09%; p < 0.001) were decreased in both MS groups compared to controls; however, they were comparable between the two MS subgroups. Anteroposterior ejection fraction (AEF) (29.16 ± 4.60% vs. 30.87 ± 7.71% vs. 21.48 ± 6.15%; p < 0.001) showed no difference between controls and MS patients in sinus rhythm, while it was lower in the MS group with atrial fibrillation. Therefore, utilizing 3D echocardiography, we found distinct morphological and functional alterations of the RV in MS patients.

Controlled mitral valvuloplasty using steerable catheter- waist- formed balloon system: A clinical case series.

As the general population ages, the incidence of degenerative mitral stenosis (MS) among patients has increased. Percutaneous mitral valvuloplasty (PMV) has emerged as a well-established option for mitral rheumatic stenosis with specific characteristics. However, a blank therapeutic space must be filled with the treatment options for degenerative or rheumatic mitral stenosis in patients with many comorbidities and contraindication for valvuloplasty. We here present a comprehensive overview of the current possibilities, despite their scarce success. That is the reason why we propose a case series to facilitate a better understanding of our innovative technique in this challenging clinical context.

Mitral regurgitation carries greater prognostic significance than mitral stenosis in patients undergoing transcatheter aortic valve replacement.

This study assessed the outcomes of concomitant mitral valve disease and severe aortic stenosis in patients undergoing transcatheter aortic valve replacement (TAVR). Echocardiographic data of 813 patients with severe aortic stenosis undergoing transfemoral TAVR were collected, and clinical outcomes were analyzed for individuals with mitral stenosis and mitral regurgitation. The final cohort includes 788 patients with severe calcific aortic stenosis. Among single parameters of mitral stenosis, a smaller baseline mitral valve area (MVA) by the continuity equation and higher postprocedural mean mitral gradients (MMG) were associated with an increased risk of death at 1 year (P-values 0.02 and <0.01, respectively), but no correlation with outcomes was demonstrated after multivariate adjustment for major prognosticators. Mitral stenosis (based on MVA + MMG) was not associated with complications or mortality. Mitral regurgitation was present in 94.6% of the population at baseline and regressed by at least one grade post-TAVR in 28% of the patients. The improvement in mitral regurgitation was associated with a greater prosthetic effective orifice area (P-value 0.03). Significant (at least moderate) residual mitral regurgitation was correlated with short-term complications and shown to be an independent predictor of 1-year mortality (P-value 0.02, odds ratio (OR) 5.37, confidence interval 1.34-21.5). Mitral regurgitation has a greater impact on TAVR patients than mitral stenosis as assessed by functional methods.

Impact of Strict and Lenient Heart Rate Control on Six-Minute Walk Test and Quality of Life in Atrial Fibrillation Patients with Rheumatic Mitral Stenosis: A Preliminary Study

Background: Recent studies showed no outcome difference between strict and lenient rate control in the general Atrial Fibrillation (AF) population. However, for AF and Rheumatic Mitral Stenosis (RMS) patients, evidences were lacking. Objective: To assess the impact of strict and lenient heart rate control on the Six-Minute Walk Test (SMWT) and Health Related Quality of Life (HRQoL) in patients with AF and RMS. Material and Methods: A prospective multicenter trial across tertiary hospitals in East Java assessed strict and lenient heart rate control's impact on the SMWT and HRQoL in AF and RMS patients. Sixty-one participants were randomized into strict and lenient groups over six months from March to August 2023. Medications were adjusted to achieve target heart rates, and HRQoL was assessed using SF-36 and SMWT at baseline and three months post-target heart rate attainment. Result: In our study, 29 patients were under strict heart rate control, and 32 were under lenient control. We found a decrease in HRQoL across all subscales, with significant differences observed in general health perception and physical function among those under strict control (p=0.002 and 0.03, respectively). However, no significant disparity was found in the SMWT distance difference between lenient and strict groups (p=0.529), nor in METs (p=0.326). Conclusion: In the study, lenient heart rate control demonstrates significant effects on the general health perception and physical function subscales compared to strict heart rate control. Keyword: Strict and lenient heart rate, HRQoL, Six-Minute Walk Test, Atrial Fibrillation, Rheumatic Mitral Stenosis.

Relationship between New York functional class and duke activity status index with the severity of mitral valve stenosis and echocardiographic parameters: is left atrial strain a better predictor?

Purpose This study aimed to investigate the relationship between symptoms of patients with severe mitral stenosis (MS), evaluated by the New York Heart Association (NYHA) functional class and Duke Activity Status Index (DASI) score, and echocardiographic parameters. We evaluated patients with severe rheumatic MS diagnosed as mitral valve area (MVA) less than 1.5 cm2. All patients underwent transthoracic echocardiography and the left atrium (LA) reservoir auto-strain (LASr) analysis. In addition, DASI and NYHA scores were determined to evaluate the functional capacity and symptoms of MS patients. We evaluated 60 patients with MS with a mean age of 50.13 ± 10.28 and a median DASI score of 26.95 (26.38). There were 6 (10%) and 28 (46.7%) patients with NYHA class I and II, and 25 (40.0%) and 2 (3.3%) patients with NYHA class III and IV, respectively. NYHA class was positively correlated with LA area (LAA, r = 0.638), LA volume (LAV, r = 0.652), LAV index (LAVI, r = 0.62), E (r = 0.45), A (r = 0.25), and pulmonary artery pressure (PAP, r = 0.34), while negatively correlated with LASr (r=-0.73) and MVA (r=-0.417). Furthermore, the DASI score was positively associated with LASr (r = 0.81) and MVA (r = 0.52) while negatively correlated with LAA (r=-0.62), LAV (r=-0.65), LAVI (r=-0.56), E (r=-0.46), A (r=-0.3), and PAP (r= -0.32). Our findings indicate that LAA, LAV, LAVI, E, A, PAP, MVA, and LASr are associated with NYHA and DASI scores in MS patients. Additionally, the LASr had the strongest correlation between all measured parameters in severe MS patients.

Left Ventricle Myocardial Work Correlated with Functional Capacity in Severe Rheumatic Mitral Stenosis with Preserved Left Ventricular Ejection Fraction.

Functional capacity is reduced in mitral stenosis (MS) patients. Previous studies showed a correlation between left atrial strain and functional capacity in this population. However, currently, no left ventricle (LV) echocardiographic parameters were associated with functional capacity in patients with MS. Noninvasive LV pressure-strain loop analysis is a new echocardiographic method for evaluating LV function, integrating longitudinal strain from speckle-tracking analysis and noninvasively measured blood pressure to estimate myocardial work (MW) that overcomes the preload-dependent characteristics conventional parameters by integrating afterload. This study aimed to evaluate the association between MW and functional capacity measured using exercise tests in patients with severe MS and preserved LV ejection fraction (LVEF). Adult patients with symptomatic severe rheumatic MS (mitral valve area <1.5 cm2), and preserved LVEF (>50%) and sinus rhythm who underwent echocardiography and exercise stress test in our hospital from 2019 to 2021 were included. Exclusion criteria were suboptimal image quality for myocardial deformation analysis, significant mitral regurgitation or aortic valve lesions, coronary artery disease, intracardiac shunt, and atrial fibrillation. Standard echocardiographic parameters were measured, and all MW parameters were included. Exercise treadmill testing was performed using the modified Bruce protocol. A total of 33 individuals with isolated severe rheumatic MS in sinus rhythm (age 39.8 ± 9.8 years) were included in the study. Patients with severe isolated MS showed significantly impaired LV-global longitudinal strain values compared to normal reference values. Furthermore, patients with severe MS showed significantly lower values of global work index, global constructive work, and efficiency compared to normal values and higher wasted work. Global work efficiency was significantly correlated to the duration of exercise (P = 0.025, Pearson's r = 0.389). In stable patients with isolated severe mitral stenosis, MW efficiency significantly correlated with functional capacity measured objectively through exercise testing.

20-year follow-up of rheumatic mitral stenosis patients after percutaneous mitral commissurotomy: invasive transmitral gradient differential as a predictor of events.

Percutaneous mitral valve commissurotomy (PMC) is a viable alternative to mitral valve (MV) surgery in the treatment of patients with rheumatic mitral stenosis (RMS). In this single-center retrospective study of consecutive patients with RMS submitted to PMC from 1991 to 2008, we analyzed clinical, echocardiographic, and hemodynamic data and events during follow-up (FUP) until December 2021. Major adverse cardiovascular events (MACE) were a combined endpoint of all-cause death, cardiovascular hospitalization, and MV re-intervention. A total of 124 patients were enrolled: 108 (87.1%) were female, with a mean age at PMC of 46 [standard deviation (SD) 11] years. PMC was successful in 91.1%, with a mean reduction in invasive transmitral pressure gradient (TMPG) of 8 (SD 7) mmHg at PMC time. During the mean FUP of 20 (SD 6) years, 51 (41.1%) patients had MV re-intervention (86.3% surgery and 13.7% redo-PMC), 37 (29.8%) were hospitalized, and 30 (24.2%) died. Approximately 75% of patients remained MACE-free after 10 years, and this percentage decreased to around 40% after 20 years; at this time mark, about 8 in 10 patients were alive. A reduction of <5 mmHg in TMPG at PMC time was associated with a 2.7-fold greater rate of MACE compared to a reduction of ≥5 mmHg, independent of MV regurgitation after PMC and moderate disease of other valves (adjusted hazard ratio 2,7; 95% confidence interval 1.395-5.298, p=0.003). In this cohort with favorable long-term results after PMC, a reduction of <5 mmHg in TMPG at PMC time was associated with MACE during FUP. More studies are needed to validate this independent predictor.

Assessment of Left Ventricular Deformation in Rheumatic Mitral Stenosis Patients (Speckle Tracking Study)

Assessment of Left Ventricular Deformation in Rheumatic Mitral Stenosis Patients (Speckle Tracking Study)

Systolic Pulmonary Artery Pressure Thresholds Predictive of Dyspnea on Stress Doppler Echocardiography in Mitral Stenosis.

On Stress Doppler Echocardiography (SDE) in mitral stenosis, the systolic pulmonary artery pressure (SPAP) threshold at peak exercise recommended by the guidelines as an indication for percutaneous mitral commissurotomy (PMC) used to be 60 mmHg. However, because of the paucity of studies, that threshold has been controversial. The Europeans stopped using the value in 2007, followed by the Americans in 2014. Determine SPAP thresholds on SDE at peak exercise and post-exercise predictive of dyspnea as an indication for PMC in mitral stenosis. Three hundred mitral stenosis patients with a mitral valve area (MVA) ≤ 2 cm2 and NYHA I-II-III were included. A treadmill stress test (Bruce protocol) was used in all cases to distinguish dyspneic patients (n = 182) from non dyspneic patients (n = 118). SDE was performed on a stress echocardiography bed, starting at 30 W and increasing by 30 W every 3 min. At peak exercise, the best SPAP threshold obtained was 75 mmHg: specificity (Sp) = 0.98 (0.94-1), positive likelihood ratio (LR+) = 47 (41-50), positive predictive value (PPV) = 0.99 (0.95-1), and positive predictive error (PPE) = 0.01 (0.002-0.05). This compared with, respectively, 0.34, 1, 0.69 and 0.31 at 60 mmHg. Post-exercise, the best SPAP threshold found was 60 mmHg: Sp = .94 (0.88-0.97), LR = 9 (4-10), PPV = 0.94 (0.87-0.97), and PPE = 0.06 (0.03-0.13). Regarding the prediction of dyspnea as an indication for PMC, our study shows that a SPAP value at peak exercise of 60 mmHg lacks predictive power (LR+=1). The optimal threshold observed was 75 mmHg at peak exercise (LR+ = 47 [41-50]) and 60 mmHg post-exercise (LR+ = 9 [4-10]).

Correlation between mitral valve area and left atrial function in rheumatic mitral valve stenosis patients.

Rheumatic heart disease (RHD) continues to be one of the leading causes of cardiovascular morbidity and mortality. The mitral valve frequently develops mitral stenosis (MS), and it is the most prevalent valve lesion in patients with chronic RHD. Left atrial (LA) functional impairment is associated with rheumatic MS. The aim of this study was to evaluate the association between LA function and mitral valve area (MVA) in rheumatic MS patients, and to assess the echocardiographic parameters in sinus rhythm and atrial fibrillation (AF) patients. This was a cross-sectional, descriptive study that involved patients with rheumatic MS. Patients underwent a standard 12-lead electrocardiogram and echocardiographic examination. MVA was assessed and correlated with LA function. Comparison was made between sinus rhythm and AF patients. Eighty-one patients with rheumatic MS were included in this study, with 71.6% of them having associated MR. MVA showed a statistically highly significant positive correlation with LA and right ventricular (RV) function, and a statistically significant/highly significant negative correlation with their dimensions. A higher percentage of patients with severe MS was in AF (58.1%). There was a positive correlation between LA function and MVA in rheumatic MS patients. AF was related to the severity of MS.

Assessment Of Coagulation Factors In Patients Of Mitral Stenosis In Sinus Rhythm With Left Atrial Appendage Inactivity

Assessment Of Coagulation Factors In Patients Of Mitral Stenosis In Sinus Rhythm With Left Atrial Appendage Inactivity

Multimodality imaging in PMV: comparison between cardiac computed tomography and echocardiography from multicenter mitral stenosis registry (MASTER registry)

Abstract Background The Wilkins score is a grading system that, from the past to the present, provides vital hints in patients with rheumatic mitral stenosis (MS). However even if the score is modest, complications may occur after percutaneous mitral valvuloplasty (PMV)1. Also Wilkins score alone does not reflect the development of various multi-modality imaging related to mitral stenosis. The purpose of this study was to evaluate the variability between echocardiography and cardiac computed tomography (CT) in measuring the score, and to examine the immediate PMV outcome related to the score measured by each modalities. Methods From the Multicenter mitrAl STEnosis with Rheumatic etiology (MASTER) registry of 3,140 patients with at least moderate MS, we included 96 rheumatic MS patients (age 56.4±11.5 years, 78 women) who underwent PMV and had remeasurable images between January 2010 and December 2022. We analyzed the discrepancies between the Wilkins score determined by echocardiography (transthoracic echocardiography or transesophageal echo in certain individuals) and the score determined by cardiac CT as a whole or among each parameter. Furthermore, the frequency of composite outcomes with high scores was compared between modalities. A composite outcome was defined as a case in which the outcome following PMV was not optimal (post PMV mitral valve area (MVA) less than 1.5 cm2 or mitral regurgitation (MR) with grade II-III or higher occurred). Results The average Wilkins score obtained by echocardiography was less than that measured by CT. (7.2±1.3 vs. 8.0±2.4) CT displayed higher score values than echocardiography, particularly for thickness (n= 47, 41.7%) and sub-valvular thickness (n= 40, 41.7%). Echo evaluated the presence of calcium, but CT showed no calcium in many cases. (n=19, 19.4% vs. n=38, 39.6%). Based on the previously commonly used Wilkins score of 9 points, when evaluated by echocardiography, there wasn't a significant difference except for the post MVA (1.6±0.2 vs. 1.5±0.2 cm2, p value = 0.015) between less than and more than 9 points. Yet, in 40 patients with a CT-evaluated Wilkins score of 9 or higher, the post MVA was substantially smaller (1.6±0.1 vs. 1.5±0.3 cm2, p = 0.019) than in those without, and MDPG remained elevated even after the procedure. (4.0±1.4 vs. 4.9 ± 1.9 mmHg, p = 0.017) In addition, there were more cases where the MVA remained less than 1.5 cm2 after the procedure (n=10, 17.9% vs. n=22, 55.0%, p&amp;lt;0.001). For this reason, the composite outcome found to be highly likely to occur. Even when the Wilkins score evaluated by echo was low, the composite outcome ratio was similarly high if the CT score was high. Conclusions The average value of the Wilkins score measured by echocardiography was lower than that measured by CT, mainly due to differences in leaflet thickness and sub-valvular thickness evaluation. Cases with a high Wilkins score evaluated by CT were more likely to have suboptimal MVA or significant MR after PMV.Wilkins score measured by each modalitieComposite event rate by Wilkins score

Impact of post-percutaneous mitral balloon valvuloplasty mitral valve area indexed for the body size on long-term outcomes in rheumatic mitral stenosis: a 20-year retrospective analysis

Abstract Introduction Percutaneous mitral balloon valvuloplasty (PBMV) remains one of the standard treatments for symptomatic rheumatic mitral stenosis (MS)(1). The procedural success criteria are generally defined as a post-procedural mitral valve area (MVA) of more than 1.5 cm2 without significant mitral regurgitation or in-hospital complications(2, 3). However, the effect of body size on the post-procedural MVA is not well examined. Purpose This study intended to investigate the association between the different methods of indexing post-PBMV MVA for the body size parameters and event-free survival compared to the absolute MVA in rheumatic MS patients treated with PBMV. Methods We retrospectively enrolled clinically significant rheumatic MS patients (MVA ≤1.5 cm2) who underwent PBMV with Inoue balloon between June 2002 and February 2021. The patients who experienced in-hospital complications (stroke, emergency surgery, or death) were excluded. A final number of 584 out of 618 patients were included in the analysis. Post-procedural MVA was assessed using echocardiographic 2D planimetry or pressure half-time if planimetry was not available. Post-PBMV MVA was indexed by body surface area (BSA), body mass index (BMI), body weight or height. The median value of absolute MVA and indexed MVA was used to stratify patients into two groups. The primary outcome was the composite of death, repeat PBMV, and mitral valve surgery. We performed Cox regression analyses to assess the association between groups and outcomes. C-index was calculated to assess the discriminative ability of each index. Results The mean age was 41.5 (±11.9) years, and 490 patients (82.8%) were female. The prevalence of atrial fibrillation was 39.5%. The median Wilkin score was 8 (interquartile range of 7-9). The mean pre-procedural and post-procedural MVA was 0.92 (±0.24) and 1.57 (±0.28) cm2, respectively. The average pre-procedural and post-procedural mean pressure gradient was 13.1 (±6.3) and 5.7 (±3.0) mmHg, respectively. The prevalence of post-procedural MR in a moderately severe to a severe degree was 3.8%. Over a median follow-up of 3.9 years, 194 composite events occurred. Patients with post-procedural indexed MVA of any type greater than a median were not associated with a significantly lower risk of primary outcome compared to those with indexed MVA less than the median (Picture 1). Moreover, absolute MVA greater than a median (1.55 cm2) was independently associated with a lower risk of primary outcome after adjusting with age and gender (Hazard ratio [95% CI] = 0.658 [0.493-0.879], p = 0.005). The discriminative ability of the absolute MVA was highest than the indexed MVA (Picture 2). Conclusion Indexing post-procedural MVA did not provide additional benefit on long-term risk stratification after PBMV compared with the absolute MVA.