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Jean G, Mogensen NSB, Clavel MA. Aortic Valvular Stenosis and Heart Failure: Advances in Diagnostic, Management, and Intervention. Heart Fail Clin 2023; 19:273-283. [PMID: 37230643 DOI: 10.1016/j.hfc.2023.02.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Up to 30% of patients with aortic stenosis (AS) present with heart failure (HF) symptoms with either reduced or preserved left ventricular ejection fraction. Many of these patients present with a low-flow state, reduced aortic-valve-area (≤1.0 cm2) with low aortic-mean-gradient and aortic-peak-velocity (<40 mm Hg and <4.0 m/s). Thus, determination of true severity is essential for correct management, and multi-imaging evaluation must be performed. Medical treatment of HF is imperative and should be optimized concurrently with the determination of AS-severity. Finally, AS should be treated according to guidelines, keeping in mind that HF and low-flow increase interventions risks.
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Bernard J, Jean G, Bienjonetti-Boudreau D, Jacques F, Tastet L, Salaun E, Clavel MA. Prognostic utility of N-terminal pro B-type natriuretic peptide ratio in mixed aortic valve disease. Open Heart 2023; 10:e002361. [PMID: 37474135 PMCID: PMC10357672 DOI: 10.1136/openhrt-2023-002361] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/09/2023] [Accepted: 06/30/2023] [Indexed: 07/22/2023] Open
Abstract
OBJECTIVE We aimed to assess the incremental prognostic value of N-terminal-pro-B-type natriuretic peptide (Nt-proBNP) for risk stratification in mixed aortic valve disease (MAVD) patients. METHODS We included 556 (73±12 years, 37% women) consecutive patients with at least a moderate aortic stenosis (AS) or aortic regurgitation (AR) lesion with a concomitant AS or AR of any severity in whom Nt-proBNP was measured and expressed as its ratio (measured Nt-proBNP divided by the upper limit of normal Nt-proBNP for age and sex). The primary endpoint was all-cause mortality. RESULTS Baseline median Nt-proBNP ratio was 3.8 (IQR: 1.5-11.3), and the median follow-up was 5.6 years (4.8-6.1). Early aortic valve replacement (AVR) was performed within 3 months in 423 (76%) patients, while 133 (24%) remained initially under medical treatment. In comprehensive multivariable analyses, Nt-proBNP ratio was significantly associated with excess mortality (continuous variable: HR (95% CI): 1.24 (1.04 to 1.47), p=0.02; Nt-proBNP ratio ≥3: 2.41 (1.33 to 4.39), p=0.004). The independent prognostic value was also observed in patients with severe or non-severe AS/AR, and those treated by early-AVR (all p<0.04). Nt-proBNP ratio as continuous and dichotomic (≥3) variables showed incremental prognostic value (all net reclassification index >0.42, all p≤0.008). After early-AVR, Nt-proBNP ratio ≥3 was associated with higher 30-day mortality (9 (4%) vs 1 (0.5%), p=0.02). CONCLUSIONS In this series of MAVD patients, Nt-proBNP ratio was a powerful predictor of early and long-term mortality, even in patients with both non-severe AS/AR. Moreover, early-AVR may be an option for patients with Nt-proBNP ratio ≥3. Further randomised studies are needed to validate this last point.
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Sá MP, Van den Eynde J, Jacquemyn X, Erten O, Rodriguez R, Goldman S, Coady PM, Gnall E, Gray WA, Jarrett H, Abramson SV, Clavel MA, Pibarot P, Ramlawi B. Computed tomography-derived membranous septum length as predictor of conduction abnormalities and permanent pacemaker implantation after TAVI: A meta-analysis of observational studies. Catheter Cardiovasc Interv 2023; 101:1203-1213. [PMID: 37070459 DOI: 10.1002/ccd.30666] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/14/2023] [Revised: 03/13/2023] [Accepted: 04/08/2023] [Indexed: 04/19/2023]
Abstract
BACKGROUND Permanent pacemaker implantation (PPI) after transcatheter aortic valve implantation (TAVI) is associated with higher risk of mortality and rehospitalization for heart failure. Efforts to prevent conduction abnormalities (CA) requiring PPI after TAVI should be made. The membranous septum (MS) length and its interaction with implantation depth (ID-ΔMSID) could provide useful information about the risk of CA/PPI following TAVI. OBJECTIVES To identify MS length and ΔMSID as predictors of CA/PPI following TAVI. METHODS Study-level meta-analysis of studies published by September 30, 2022. RESULTS Eighteen studies met our eligibility including 5740 patients. Shorter MS length was associated with a significantly higher risk of CA/PPI (per 1 mm decrease: odds ratio [OR] 1.60, 95% confidence interval [CI] 1.28-1.99, p < 0.001). Similarly, lower ΔMSID was associated with a significantly higher risk of CA/PPI (per 1 mm decrease: OR 1.75, 95% CI 1.32-2.31, p < 0.001). Meta-regression analyses revealed a statistically significant modulation of the effect of shorter MS length and lower ΔMSID on the outcome (CA/PPI) by balloon postdilatation (positive regression coefficients with p < 0.001); with increasing use of balloon postdilatation, the effect of shorter MS length and lower ΔMSID on the outcome increased. MS length and ΔMSID demonstrated excellent discriminative abilities, with diagnostic ORs equaling 9.49 (95% CI 4.73-19.06), and 7.19 (95% CI 3.31-15.60), respectively. CONCLUSION Considering that short MS length and low ΔMSID are associated with higher risk of CA and PPI, we should include measurement of MS length in the pre-TAVI planning with MDCT and try to establish optimal ID values before the procedure to avoid CA/PPI.
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Dehghani P, Singh J, Singer Z, Booker J, Lavoie AJ, Zimmermann RH, Shavadia JS, Webb JG, Clavel MA, Pibarot P. Catheter-Induced Postextrasystolic Potentiation in the Assessment of Severity of Low-Gradient Aortic Valve Stenosis. Circ Cardiovasc Interv 2023; 16:e012892. [PMID: 37125538 DOI: 10.1161/circinterventions.123.012892] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 05/02/2023]
Abstract
BACKGROUND Deciphering which patients with low-gradient aortic valve disease have severe stenosis can be difficult. We aimed to correlate the postextrasystolic potentiation (PESP) with dobutamine stress echocardiography and multidetector computed tomography in patients with low-gradient aortic valve stenosis. METHODS Patients with an aortic valve area ≤1 cm2 and a mean gradient <40 mm Hg were included. Aortic valve stenosis severity was assessed by a core lab with dobutamine stress echocardiography, followed by a multidetector computed tomography aortic valve score if indeterminate. A premature ventricular contraction was induced by intentional catheter contact with the myocardium within the left ventricle. PESP was calculated as a percent change of pre-to-post mean gradient. Multidetector computed tomography was used to measure the aortic valve calcification score, and subsequently, aortic valve calcification density. RESULTS Twenty-eight patients (age, 77±10 years; 19 female) were included. Dobutamine stress echocardiography increased mean gradient from baseline of 25±7 mm Hg to 36±11 mm Hg; pre-premature ventricular contraction mean gradient was 25±7 mm Hg and increased to post-premature ventricular contraction mean gradient of 32±10 mm Hg, representing a PESP of 24±11%. A ≥20% in PESP resulted in 100% sensitivity, 77% specificity, 83% positive predictive value, and 100% negative predictive value for diagnosing severe aortic valve stenosis. There was a significant correlation between PESP and projected aortic valve area and aortic valve calcification density (R=-0.64, P=0.0003; R=0.057, P=0.014, respectively). CONCLUSIONS In patients with low-gradient aortic valve stenosis, catheter-induced premature ventricular contractions during cardiac catheterization causing ≥20% PESP has a 100% sensitivity for severe aortic valve stenosis. Validation of this 20% cutoff in larger groups with correlation to clinical end points is required.
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Ludwig S, Schofer N, Abdel-Wahab M, Urena M, Jean G, Renker M, Hamm CW, Thiele H, Iung B, Ooms JF, Wiessman M, Mogensen NSB, Longère B, Perrin N, Ben Ali W, Coisne A, Dahl JS, Van Mieghem NM, Kornowski R, Kim WK, Clavel MA. Transcatheter Aortic Valve Replacement in Patients With Reduced Ejection Fraction and Nonsevere Aortic Stenosis. Circ Cardiovasc Interv 2023; 16:e012768. [PMID: 37192310 DOI: 10.1161/circinterventions.122.012768] [Citation(s) in RCA: 9] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/22/2022] [Accepted: 03/28/2023] [Indexed: 05/18/2023]
Abstract
BACKGROUND The potential benefit of transcatheter aortic valve replacement (TAVR) in patients with nonsevere aortic stenosis (AS) and heart failure is controversial. This study aimed to assess outcomes of patients with nonsevere low-gradient AS (LGAS) and reduced left ventricular ejection fraction undergoing TAVR or medical management. METHODS Patients undergoing TAVR for LGAS and reduced left ventricular ejection fraction (<50%) were included in a multinational registry. True-severe low-gradient AS (TS-LGAS) and pseudo-severe low-gradient AS (PS-LGAS) were classified according to computed tomography-derived aortic valve calcification thresholds. A medical control group with reduced left ventricular ejection fraction and moderate AS or PS-LGAS was used (Medical-Mod). Adjusted outcomes between all groups were compared. Among patients with nonsevere AS (moderate or PS-LGAS), outcomes after TAVR and medical therapy were compared using propensity score-matching. RESULTS A total of 706 LGAS patients undergoing TAVR (TS-LGAS, N=527; PS-LGAS, N=179) and 470 Medical-Mod patients were included. After adjustment, both TAVR groups showed superior survival compared with Medical-Mod patients (all P<0.001), while no difference was found between TS-LGAS and PS-LGAS TAVR patients (P=0.96). After propensity score-matching among patients with nonsevere AS, PS-LGAS TAVR patients showed superior 2-year overall (65.4%) and cardiovascular survival (80.4%) compared with Medical-Mod patients (48.8% and 58.5%, both P≤0.004). In a multivariable analysis including all patients with nonsevere AS, TAVR was an independent predictor of survival (hazard ratio, 0.39 [95% CI, 0.27-0.55]; P<0.0001). CONCLUSIONS Among patients with nonsevere AS and reduced left ventricular ejection fraction, TAVR represents a major predictor of superior survival. These results reinforce the need for randomized-controlled trials comparing TAVR versus medical management in heart failure patients with nonsevere AS. REGISTRATION URL: https://www. CLINICALTRIALS gov; Unique identifier: NCT04914481.
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Sá MP, Jacquemyn X, Van den Eynde J, Tasoudis P, Dokollari A, Torregrossa G, Sicouri S, Clavel MA, Pibarot P, Ramlawi B. Impact of Prosthesis-Patient Mismatch After Transcatheter Aortic Valve Replacement: Meta-Analysis of Kaplan-Meier-Derived Individual Patient Data. JACC Cardiovasc Imaging 2023; 16:298-310. [PMID: 36648055 DOI: 10.1016/j.jcmg.2022.07.013] [Citation(s) in RCA: 28] [Impact Index Per Article: 28.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/07/2022] [Revised: 06/07/2022] [Accepted: 07/15/2022] [Indexed: 01/18/2023]
Abstract
BACKGROUND It remains controversial whether prosthesis-patient mismatch (PPM) (in general considered moderate if indexed effective orifice area is 0.65-0.85 cm2/m2 and severe when <0.65 cm2/m2) affects the outcomes after transcatheter aortic valve replacement (TAVR). OBJECTIVES The purpose of this study is to evaluate the time-varying effects and association of PPM with the risk of overall mortality. METHODS Study-level meta-analysis of reconstructed time-to-event data from Kaplan-Meier curves of studies published by December 30, 2021. RESULTS In total, 23 studies met our eligibility criteria and included a total of 81,969 patients included in the Kaplan-Meier curves (19,612 with PPM and 62,357 without PPM). Patients with moderate/severe PPM had a significantly higher risk of mortality compared with those without PPM (HR: 1.09 [95% CI: 1.04-1.14]; P < 0.001). In the first 30 months after the procedure, mortality rates were significantly higher in the moderate/severe PPM group (HR: 1.1 [95% CI: 1.05-1.16]; P < 0.001). In contrast, the landmark analysis beyond 30 months yielded a reversal of the HR (0.83 [95% CI: 0.68-1.01]; P = 0.064), but without statistical significance. In the sensitivity analysis, although the authors observed that severe PPM showed higher risk of mortality in comparison with no PPM (HR: 1.25 [95% CI: 1.16-1.36]; P < 0.001), they did not observe a statistically significant difference for mortality between moderate PPM and no PPM (HR: 1.03 [95% CI: 0.96-1.10]; P = 0.398). CONCLUSIONS Severe PPM, but not moderate PPM, was associated with higher risk of mortality following TAVR. These results provide support to implementation of preventive strategies to avoid severe PPM following TAVR.
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Altes A, Bernard J, Dumortier H, Dupuis M, Toubal O, Mahjoub H, Tartar J, Côté N, Clavel MA, O'Connor K, Bernier M, Beaudoin J, Vincentelli A, Pibarot P, Maréchaux S. Clinical significance of myocardial contraction fraction in significant primary mitral regurgitation. Arch Cardiovasc Dis 2023; 116:151-158. [PMID: 36805238 DOI: 10.1016/j.acvd.2023.01.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/11/2022] [Revised: 01/03/2023] [Accepted: 01/04/2023] [Indexed: 02/08/2023]
Abstract
BACKGROUND The optimal timing for mitral valve (MV) surgery in asymptomatic patients with primary mitral regurgitation (MR) remains a matter of debate. Myocardial contraction fraction (MCF) - the ratio of the left ventricular (LV) stroke volume to that of the myocardial volume - is a volumetric measure of LV myocardial shortening independent of size or geometry. AIM To assess the relationship between MCF and outcome in patients with significant chronic primary MR due to prolapse managed in contemporary practice. METHODS Clinical, Doppler-echocardiographic and outcome data prospectively collected in 174 patients (mean age 62 years, 27% women) with significant primary MR and no or mild symptoms were analysed. The impact of MCF< or ≥30% on cardiac events (cardiovascular death, acute heart failure or MV surgery) was studied. RESULTS During an estimated median follow-up of 49 (22-77) months, cardiac events occurred in 115 (66%) patients. The 4-year estimates of survival free from cardiac events were 21±5% for patients with MCF <30% and 40±6% for those with ≥30% (P<0.001). MCF <30% was associated with a considerable increased risk of cardiac events after adjustment for established clinical risk factors, MR severity and current recommended class I triggers for MV surgery (adjusted hazard ratio: 2.33, 95% confidence interval: 1.51-3.58; P<0.001). Moreover, MCF<30% improved the predictive performance of models, with better global fit, reclassification and discrimination. CONCLUSIONS MCF<30% is strongly associated with occurrence of cardiac events in patients with significant primary MR due to prolapse. Further studies are needed to assess the direct impact of MCF on patient management and outcomes.
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Girard A, Gaillard E, Puri R, Capoulade R, Chan KL, Paulin A, Manikpurage HD, Dumesnil J, Tam JW, Teo KK, Couture C, Wareham NJ, Clavel MA, Stroes ESG, Mathieu P, Thériault S, Tsimikas S, Pibarot P, Boekholdt SM, Arsenault BJ. Impact of C-reactive protein levels on lipoprotein(a)-associated aortic stenosis incidence and progression. EUROPEAN HEART JOURNAL OPEN 2023; 3:oead032. [PMID: 37077580 PMCID: PMC10108885 DOI: 10.1093/ehjopen/oead032] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/14/2022] [Revised: 02/14/2023] [Accepted: 03/22/2023] [Indexed: 04/01/2023]
Abstract
Aims Elevated lipoprotein(a) [Lp(a)] levels are associated with the risk of coronary artery disease (CAD) and calcific aortic valve stenosis (CAVS). Observational studies revealed that Lp(a) and C-reactive protein (CRP) levels, a biomarker of systemic inflammation, may jointly predict CAD risk. Whether Lp(a) and CRP levels also jointly predict CAVS incidence and progression is unknown. Methods and results We investigated the association of Lp(a) with CAVS according to CRP levels in the European Prospective Investigation into Cancer and Nutrition (EPIC)-Norfolk study (n = 18 226, 406 incident cases) and the UK Biobank (n = 438 260, 4582 incident cases), as well as in the ASTRONOMER study (n = 220), which assessed the haemodynamic progression rate of pre-existing mild-to-moderate aortic stenosis. In EPIC-Norfolk, in comparison to individuals with low Lp(a) levels (<50 mg/dL) and low CRP levels (<2.0 mg/L), those with elevated Lp(a) (>50 mg/dL) and low CRP levels (<2.0 mg/L) and those with elevated Lp(a) (>50 mg/dL) and elevated CRP levels (>2.0 mg/L) had a higher CAVS risk [hazard ratio (HR) = 1.86 (95% confidence intervals, 1.30-2.67) and 2.08 (1.44-2.99), respectively]. A comparable predictive value of Lp(a) in patients with vs. without elevated CRP levels was also noted in the UK Biobank. In ASTRONOMER, CAVS progression was comparable in patients with elevated Lp(a) levels with or without elevated CRP levels. Conclusion Lp(a) predicts the incidence and possibly progression of CAVS regardless of plasma CRP levels. Lowering Lp(a) levels may warrant further investigation in the prevention and treatment of CAVS, regardless of systemic inflammation.
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Sá MP, Van den Eynde J, Simonato M, Hirji S, Erten O, Jacquemyn X, Tasoudis P, Dokollari A, Sicouri S, Weymann A, Ruhparwar A, Arora R, Clavel MA, Pibarot P, Ramlawi B. Late outcomes of valve-in-valve transcatheter aortic valve implantation versus re-replacement: Meta-analysis of reconstructed time-to-event data. Int J Cardiol 2023; 370:112-121. [PMID: 36370873 DOI: 10.1016/j.ijcard.2022.11.012] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/18/2022] [Revised: 10/19/2022] [Accepted: 11/07/2022] [Indexed: 11/11/2022]
Abstract
AIMS To evaluate all-cause mortality in ViV-TAVI versus redo SAVR in patients with failed bioprostheses. METHODS Study-level meta-analysis of reconstructed time-to-event data from Kaplan-Meier curves of non-randomized studies published by September 30, 2021. RESULTS Ten studies met our eligibility criteria and included a total of 3345 patients (1676 patients underwent ViV-TAVI and 1669 patients underwent redo SAVR). Pooling all the studies, ViV-TAVI showed a lower risk of all-cause mortality in the first 44 days [hazard ratio (HR) 0.67, 95% confidence interval (CI) 0.49-0.93, P = 0.017], with an HR reversal after 197 days favoring redo SAVR (HR 1.53; 95% CI 1.22-1.93; P < 0.001). Pooling only the matched populations (1143 pairs), ViV-TAVI showed a lower risk of all-cause mortality in the first 55 days [hazard ratio (HR) 0.63, 95% confidence interval (CI) 0.45-0.89, P < 0.001], with a reversal HR after 212 days favoring redo SAVR (HR 1.57; 95% CI 1.22-2.03; P < 0.001). The Cox regression model showed a statistically significant association of prosthesis-patient mismatch (PPM) with all-cause mortality during follow-up for ViV-TAVI (HR 1.03 per percentage increase in the study- and treatment arm-level proportion of PPM, 95% 1.02-1.05, P < 0.001). CONCLUSION ViV-TAVI is associated with a strong protective effect immediately after the procedure in comparison with redo SAVR, however, this initial advantage reverses over time and redo SAVR seems to be a protective factor for all-cause mortality after 6 months. Considering that these results are the fruit of pooling data from observational studies, they should be interpreted with caution and trials are warranted.
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Alkurashi AK, Thaden JJ, Naser JA, El-Am EA, Pislaru SV, Greason KL, Negrotto SM, Clavel MA, Pellikka PA, Maleszewski JJ, Nkomo VT. Underestimation of Aortic Stenosis Severity by Doppler Mean Gradient during Atrial Fibrillation: Insights from Aortic Valve Weight. J Am Soc Echocardiogr 2023; 36:53-59. [PMID: 36228839 DOI: 10.1016/j.echo.2022.10.007] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/27/2021] [Revised: 08/01/2022] [Accepted: 10/06/2022] [Indexed: 11/06/2022]
Abstract
BACKGROUND Doppler mean gradient (MG) can underestimate aortic stenosis (AS) severity when obtained during atrial fibrillation (AF) compared with sinus rhythm (SR). Aortic valve weight (AVW) is a flow-independent measure of AS severity. The objective of this study was to determine whether AVW or AVW/MG ratio was increased in AF versus SR in patients with AS. METHODS Excised native aortic valves from 495 consecutive patients (median age, 77 years; interquartile range [IQR], 71-82 years; 40% women), with left ventricular ejection fractions ≥50% who underwent surgical aortic valve replacement for native valve severe AS (aortic valve area ≤ 1 cm2 or indexed aortic valve area ≤ 0.6 cm2/m2) were weighed. Excised AVW/MG ratios were compared in AF versus SR in patients with high-gradient AS (aortic peak velocity ≥ 4 m/sec or MG ≥ 40 mm Hg) and low-gradient AS (aortic peak velocity < 4 m/sec and MG < 40 mm Hg) in sex-specific analyses. RESULTS AF was present in 51 patients (10%; 11 of 51 [22%] had low-gradient AS) and SR in 444 (90%; 23 of 444 [5%] had low-gradient AS). There was no difference in sex distribution between AF and SR. Aortic valve area was not different, but forward stroke volume index and transaortic valve flow rate were lower in AF (P ≤ .002 for all); MG was lower in AF versus SR (median, 46 mm Hg [IQR, 37-50 mm Hg] vs 50 mm Hg [IQR, 44-61 mm Hg]; P < .0001). Overall AVW was not different (median, 2,290 mg [IQR, 1,830-3,063 mg] vs 2,140 mg [IQR, 1,530-2,958 mg]; P = .31), but overall AVW/MG ratio was higher in AF (median, 55 [IQR, 41-67] vs 42 [IQR, 30-55]; P = .001). In sex- and MG-specific analyses, the AVW/MG ratio was higher in AF compared with SR in men with high-gradient AS (median, 58 [IQR, 41-75] vs 51 [IQR, 39-61]; P = .03), but the differences were not statistically significant between AF and SR in other groups. CONCLUSIONS AVW was discordant to Doppler MG in AF compared with SR in men with high-gradient AS. Additional studies of the relationship of MG to other measures of AS severity, such as leaflet fibrosis, are needed.
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Fukui M, Annabi MS, Rosa VEE, Ribeiro HB, Stanberry LI, Clavel MA, Rodés-Cabau J, Tarasoutchi F, Schelbert EB, Bergler-Klein J, Bartko PE, Dona C, Mascherbauer J, Dahou A, Rochitte CE, Pibarot P, Cavalcante JL. Comprehensive myocardial characterization using cardiac magnetic resonance associates with outcomes in low gradient severe aortic stenosis. Eur Heart J Cardiovasc Imaging 2022; 24:46-58. [PMID: 35613021 DOI: 10.1093/ehjci/jeac089] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/15/2021] [Revised: 04/21/2022] [Accepted: 04/25/2022] [Indexed: 12/24/2022] Open
Abstract
AIMS This study sought to compare cardiac magnetic resonance (CMR) characteristics according to different flow/gradient patterns of aortic stenosis (AS) and to evaluate their prognostic value in patients with low-gradient AS. METHODS AND RESULTS This international prospective multicentric study included 147 patients with low-gradient moderate to severe AS who underwent comprehensive CMR evaluation of left ventricular global longitudinal strain (LVGLS), extracellular volume fraction (ECV), and late gadolinium enhancement (LGE). All patients were classified as followings: classical low-flow low-gradient (LFLG) [mean gradient (MG) < 40 mmHg and left ventricular ejection fraction (LVEF) < 50%]; paradoxical LFLG [MG < 40 mmHg, LVEF ≥ 50%, and stroke volume index (SVi) < 35 ml/m2]; and normal-flow low-gradient (MG < 40 mmHg, LVEF ≥ 50%, and SVi ≥ 35 ml/m2). Patients with classical LFLG (n = 90) had more LV adverse remodelling including higher ECV, and higher LGE and volume, and worst LVGLS. Over a median follow-up of 2 years, 43 deaths and 48 composite outcomes of death or heart failure hospitalizations occurred. Risks of adverse events increased per tertile of LVGLS: hazard ratio (HR) = 1.50 [95% CI, 1.02-2.20]; P = 0.04 for mortality; HR = 1.45 [1.01-2.09]; P < 0.05 for composite outcome; per tertile of ECV, HR = 1.63 [1.07-2.49]; P = 0.02 for mortality; HR = 1.54 [1.02-2.33]; P = 0.04 for composite outcome. LGE presence also associated with higher mortality, HR = 2.27 [1.01-5.11]; P < 0.05 and composite outcome, HR = 3.00 [1.16-7.73]; P = 0.02. The risk of mortality and the composite outcome increased in proportion to the number of impaired components (i.e. LVGLS, ECV, and LGE) with multivariate adjustment. CONCLUSIONS In this international prospective multicentric study of low-gradient AS, comprehensive CMR assessment provides independent prognostic value that is cumulative and incremental to clinical and echocardiographic characteristics.
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Deslandes M, Paquin A, Guzzetti E, Beaudoin J, Barriault A, Salaun E, Clavel MA. Sex-specific correlates of valvular and arterial calcification burden in patients with moderate aortic stenosis. Open Heart 2022; 9:openhrt-2022-002139. [PMID: 36455993 PMCID: PMC9716845 DOI: 10.1136/openhrt-2022-002139] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/12/2022] [Accepted: 11/08/2022] [Indexed: 12/03/2022] Open
Abstract
INTRODUCTION There are significant sex differences in the prevalence and severity of cardiac calcifying processes. Women harbour more severe mitral annular calcification (MAC), while men exhibit worse aortic valve (AVC) and coronary artery (CAC) calcification. To better understand these differences, we investigated the correlates of cardiac calcification according to sex. METHODS We conducted a cross-sectional study of 406 patients with ≥mild aortic stenosis (AS) defined by an aortic valve area ≤1.5 cm2, a peak aortic jet velocity >2.0 m/s, or a mean transvalvular gradient >15 mm Hg. Doppler-echocardiography and non-contrast multidetector CT were performed concomitantly to assess AS and cardiac calcifications. RESULTS Mean age was 71±11 years and 33% were women. The AS haemodynamics were not significantly different between sexes (all p>0.50), with a mean indexed aortic valve area of 0.59±0.21 cm2/m2, peak aortic jet velocity of 2.78 (2.37-3.68) m/s, and mean gradient of 17.9 (12.8-31.3) mm Hg for the whole cohort. Compared with men, women harboured lower AVC (480 (222-1191) vs 1003 (484-2329) Agatston unit, AU; p<0.0001) and CAC (366 (50-914) vs 618 (167-1357) AU; p=0.007), but more severe MAC (60 (1-887) vs 48 (0-351) AU; p=0.08) and ascending aorta calcification (227 (43-863) vs 142 (7-493) AU; p=0.03). After comprehensive adjustment, sex remained an independent predictor of each cardiac calcification subtype (all p<0.02) except for the ascending aorta (p=0.32). In multivariable analysis, certain variables, like age or bicuspid aortic valve, were associated with the calcification scores in both sexes. Sex-specific predictors of calcification burden were absence of angiotensin receptor blockers (β=-0.26; p=0.007) and renal impairment (β=0.26; p=0.003) for AVC, and bisphosphonates (β=0.20; p=0.05) for CAC in women; coronary artery disease (β=0.25; p=0.001) for AVC, and angiotensin receptor blockers (β=0.19; p=0.02) and calcium/vitamin D (β=0.15; p=0.02) for MAC in men. CONCLUSION In AS, factors associated with cardiac valvular and arterial calcification differ between sexes, suggesting an important contributory role of sex in the pathophysiology of these calcifying processes.
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Carter-Storch R, Hansen SM, Dahl JS, Enevold K, Mogensen NSB, Berg H, Clavel MA, Møller JE. Hemodynamic changes during aortic valve surgery among patients with aortic stenosis. SCAND CARDIOVASC J 2022; 56:276-284. [PMID: 35848519 DOI: 10.1080/14017431.2022.2099008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Abstract
Introduction. Patients with severe aortic stenosis (AS) undergoing surgery are at increased risk of hypotension and hypoperfusion. Although treatable with inotropic agents or fluid, little is known about how these therapies affect central hemodynamics in AS patients under general anesthesia. We measured changes in central hemodynamics after dobutamine infusion and fluid bolus among patients with severe AS and associated these changes with preoperative echocardiography. Methods. We included 33 patients with severe AS undergoing surgical AVR. After induction of general anesthesia, hemodynamic measurements were obtained with a pulmonary artery catheter, including Cardiac index (CI), stroke volume index (SVi) and pulmonary capillary wedge pressure (PCWP). Measurements were repeated during dobutamine infusion, after fluid bolus and lastly after sternotomy. Results. General anesthesia resulted in a decrease in CI and SVi compared to preoperative values. During dobutamine infusion CI increased but mean SVi did not (38 ± 12 vs 37 ± 13 ml/m2, p = .90). Higher EF and SVi before surgery and a larger decrease in SVi after induction of general anesthesia were associated with an increase in SVi during dobutamine infusion. After fluid bolus both CI, SVi (48 ± 12 vs 37 ± 13 ml/min/m2, p < .0001) and PCWP increased. PCWP increased mostly among patients with a larger LA volume index. Conclusion. In patients with AS, CI can be increased with both dobutamine and fluid during surgery. Dobutamine's effect on SVI was highly variable and associated with baseline LVEF, and an increase in CI was mostly driven by an increase in heart rate. Fluid increased SVi at the cost of an increase in PCWP.
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Silva I, Turgeon PY, Paradis JM, Beaudoin J, O’Connor K, Ternacle J, Alperi A, Panagides V, Mesnier J, Gravel C, Clavel MA, Dagenais F, Dumont E, Mohammadi S, Pibarot P, Bernier M, Rodés-Cabau J, Salaun E. Percutaneous Transcatheter Edge-to-Edge Mitral Valve Repair With MitraClip System in the Era of G4. STRUCTURAL HEART 2022. [DOI: 10.1016/j.shj.2022.100114] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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Hecht S, Zenses AS, Bernard J, Tastet L, Côté N, de Freitas Campos Guimarães L, Paradis JM, Beaudoin J, O’Connor K, Bernier M, Dumont E, Kalavrouziotis D, Delarochellière R, Mohammadi S, Clavel MA, Rodés-Cabau J, Salaun E, Pibarot P. Hemodynamic and Clinical Outcomes in Redo-Surgical Aortic Valve Replacement vs. Transcatheter Valve-in-Valve. STRUCTURAL HEART 2022. [DOI: 10.1016/j.shj.2022.100106] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Sá MP, Van den Eynde J, Simonato M, Hirji S, Erten O, Dokollari A, Sicouri S, Clavel MA, Pibarot P, Ramlawi B. TCT-517 Late Outcomes of Valve-in-Valve Transcatheter Aortic Valve Implantation vs Redo Surgical Aortic Valve Replacement: Meta-Analysis of Kaplan-Meier–Derived Individual Patient Data of Matched Studies. J Am Coll Cardiol 2022. [DOI: 10.1016/j.jacc.2022.08.610] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Sá MP, Jacquemyn X, Tasoudis P, Van den Eynde J, Erten O, Dokollari A, Sicouri S, Clavel MA, Pibarot P, Ramlawi B. TCT-457 Outcomes of Prosthesis–Patient Mismatch After Transcatheter Aortic Valve Implantation: A Meta-Analysis of Kaplan-Meier–Derived Individual Patient Data. J Am Coll Cardiol 2022. [DOI: 10.1016/j.jacc.2022.08.539] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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Sá MP, Jacquemyn X, Van den Eynde J, Tasoudis P, Erten O, Sicouri S, Macedo F, Pasala T, Kaple R, Clavel MA, Pibarot P, Ramlawi B. TCT-462 Impact of Paravalvular Leak on Outcomes After TAVR: Meta-Analysis of Kaplan-Meier–Derived Individual Patient Data. J Am Coll Cardiol 2022. [DOI: 10.1016/j.jacc.2022.08.545] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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Pibarot P, Clavel MA. Live longer and better without aortic valve stenosis. THE LANCET. HEALTHY LONGEVITY 2022; 3:e573-e574. [PMID: 36102767 DOI: 10.1016/s2666-7568(22)00188-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2022] [Accepted: 08/05/2022] [Indexed: 01/15/2023] Open
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Shen M, Tastet L, Capoulade R, Bédard É, Arsenault M, Clavel MA, Pibarot P. Determinants of Aortic Stenosis Progression in Bicuspid and Tricuspid Aortic Valves. CJC PEDIATRIC AND CONGENITAL HEART DISEASE 2022; 1:184-192. [PMID: 37969929 PMCID: PMC10642113 DOI: 10.1016/j.cjcpc.2022.06.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/16/2022] [Accepted: 06/19/2022] [Indexed: 11/17/2023]
Abstract
Background Bicuspid aortic valve (BAV) is associated with a faster progression of aortic stenosis (AS). Whether the determinants of AS progression are the same or different in patients with BAV vs tricuspid aortic valve (TAV) is unknown. The aim of this study was to identify the factors associated with the progression of AS in patients with BAV vs patients with TAV. Methods Patients with AS were prospectively recruited in the Metabolic Determinants of the Progression of Aortic Stenosis (PROGRESSA) study (ClinicalTrials.gov Identifier: NCT01679431). The haemodynamic progression rate of AS was assessed by the annualized progression rate of peak aortic jet velocity (Vpeak). Univariable and multivariable linear regression analyses were used to identify the factors associated with a faster progression of AS in patients with BAV vs patients with TAV. Results There were 79 patients with BAV and 208 patients with TAV. The baseline severity of AS was similar between the 2 groups of patients as well as the annualized progression rate of AS. In patients with BAV, obesity (β = 0.25, P = 0.04), diabetes (β = 0.26, P = 0.02), and BAV with right-noncoronary cusp fusion (β = 0.29, P = 0.01) were found to be independently associated with a faster progression of AS, whereas in patients with TAV, AS baseline severity (baseline Vpeak, β = 0.14, P = 0.04) and chronic kidney disease (β = 0.16, P = 0.02) were significantly associated with AS progression. Conclusion Factors associated with progression rate of AS are different in BAV and TAV. The main factors associated with a faster progression of AS appear to be obesity, diabetes, right-noncoronary cusp fusion in patients with BAV vs chronic kidney disease in patients with TAV.
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Kolte D, Bhardwaj B, Lu M, Alu MC, Passeri JJ, Inglessis I, Vlahakes GJ, Garcia S, Cohen DJ, Lindman BR, Kodali S, Thourani VH, Daubert MA, Douglas PS, Jaber W, Pibarot P, Clavel MA, Palacios IF, Leon MB, Smith CR, Mack MJ, Elmariah S. Association Between Early Left Ventricular Ejection Fraction Improvement After Transcatheter Aortic Valve Replacement and 5-Year Clinical Outcomes. JAMA Cardiol 2022; 7:934-944. [PMID: 35895046 PMCID: PMC9330296 DOI: 10.1001/jamacardio.2022.2222] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
Abstract
Importance In patients with severe aortic stenosis and left ventricular ejection fraction (LVEF) less than 50%, early LVEF improvement after transcatheter aortic valve replacement (TAVR) is associated with improved 1-year mortality; however, its association with long-term clinical outcomes is not known. Objective To examine the association between early LVEF improvement after TAVR and 5-year outcomes. Design, Setting, and Participants This cohort study analyzed patients enrolled in the Placement of Aortic Transcatheter Valves (PARTNER) 1, 2, and S3 trials and registries between July 2007 and April 2015. High- and intermediate-risk patients with baseline LVEF less than 50% who underwent transfemoral TAVR were included in the current study. Data were analyzed from August 2020 to May 2021. Exposures Early LVEF improvement, defined as increase of 10 percentage points or more at 30 days and also as a continuous variable (ΔLVEF between baseline and 30 days). Main Outcomes and Measures All-cause death at 5 years. Results Among 659 included patients with LVEF less than 50%, 468 (71.0%) were male, and the mean (SD) age was 82.4 (7.7) years. LVEF improvement within 30 days following transfemoral TAVR occurred in 216 patients (32.8%) (mean [SD] ΔLVEF, 16.4 [5.7%]). Prior myocardial infarction, diabetes, cancer, higher baseline LVEF, larger left ventricular end-diastolic diameter, and larger aortic valve area were independently associated with lower likelihood of LVEF improvement. Patients with vs without early LVEF improvement after TAVR had lower 5-year all-cause death (102 [50.0%; 95% CI, 43.3-57.1] vs 246 [58.4%; 95% CI, 53.6-63.2]; P = .04) and cardiac death (52 [29.5%; 95% CI, 23.2-37.1] vs 135 [38.1%; 95% CI, 33.1-43.6]; P = .05). In multivariable analyses, early improvement in LVEF (modeled as a continuous variable) was associated with lower 5-year all-cause death (adjusted hazard ratio per 5% increase in LVEF, 0.94 [95% CI, 0.88-1.00]; P = .04) and cardiac death (adjusted hazard ratio per 5% increase in LVEF, 0.90 [95% CI, 0.82-0.98]; P = .02) after TAVR. Restricted cubic spline analysis demonstrated a visual inflection point at ΔLVEF of 10% beyond which there was a steep decline in all-cause mortality with increasing degree of LVEF improvement. There were no statistically significant differences in rehospitalization, New York Heart Association functional class, or Kansas City Cardiomyopathy Questionnaire Overall Summary score at 5 years in patients with vs without early LVEF improvement. In subgroup analysis, the association between early LVEF improvement and 5-year all-cause death was consistent regardless of the presence or absence of coronary artery disease or prior myocardial infarction. Conclusions and Relevance In patients with severe aortic stenosis and LVEF less than 50%, 1 in 3 experience LVEF improvement within 1 month after TAVR. Early LVEF improvement is associated with lower 5-year all-cause and cardiac death.
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Mantovani F, Benfari G, Barbieri A, Manca F, Guiducci V, Navazio A, Clavel MA. Case Report: Posterior Thoracic Window in the Presence of Pleural Effusion in Critical Care Medicine: One More Chance to Image the Aortic Valve. Front Cardiovasc Med 2022; 9:907168. [PMID: 35811731 PMCID: PMC9260961 DOI: 10.3389/fcvm.2022.907168] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2022] [Accepted: 05/30/2022] [Indexed: 11/26/2022] Open
Abstract
Good quality echocardiographic images in the setting of critical care medicine may be difficult to obtain for many reasons. We present a case of an 85-year-old woman with acute pulmonary edema and pleural effusion, where transthoracic bedside echocardiographic examination raised a suspicion for significant aortic valve disease. However, given the orthopneic decubitus of the patients, the quality of images was poor. To increase the accuracy of diagnosis, a posterior thoracic view through the pleural effusion in the sitting position was used. This view allowed the diagnosis of mixed aortic valve disease (aortic stenosis and regurgitation) and the quantification of valve disease through multiparametric criteria as recommended by current guidelines. The posterior thoracic view, when feasible, may provide a useful option in the assessment of cardiac structures and further diagnostic information in technically difficult echocardiographic examinations.
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Paquin A, Marsit O, Deschênes V, Rouabhia D, Hadjadj S, Clisson M, Robitaille C, Aikawa E, Levine RA, Pibarot P, Clavel MA, Beaudoin J. Progression of aortic stenosis after an acute myocardial infarction. Open Heart 2022; 9:openhrt-2022-002046. [PMID: 35728891 PMCID: PMC9214429 DOI: 10.1136/openhrt-2022-002046] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/24/2022] [Accepted: 05/26/2022] [Indexed: 11/26/2022] Open
Abstract
Background Myocardial infarction (MI) has been shown to induce fibrotic remodelling of the mitral and tricuspid valves. It is unknown whether MI also induces pathological remodelling of the aortic valve and alters aortic stenosis (AS) progression. We thus compared AS progression after an acute MI and in patients with/without history of MI, and assessed post-MI pathobiological changes within the aortic valve leaflets in a sheep model. Methods Serial echocardiograms in human patients with AS were retrospectively analysed and compared between 3 groups: (1) acute MI at baseline (n=68), (2) prior history of MI (n=45) and (3) controls without MI (n=101). Annualised progression rates of AS severity were compared between these 3 groups. In addition, aortic valves were harvested from 15 sheep: (1) induced inferior MI (n=10) and (2) controls without MI (n=5), for biological and histological analyses. Results In humans, the acute MI, previous MI and control groups had comparable baseline AS severity. Indexed aortic valve area (AVAi) declined faster in the acute MI group compared with controls (−0.07±0.06 vs −0.04±0.04 cm2/m2/year; p=0.004). After adjustment, acute MI status was significantly associated with faster AVAi progression (mean difference: −0.013 (95% CI −0.023 to −0.003) cm2/m2/year, p=0.008). In the post-MI experimental animal model, aortic valve thickness and qualitative/quantitative expression of collagen were significantly increased compared with controls. Conclusions The results of this study suggest that AS progression is accelerated following acute MI, which could be caused by increased collagen production and thickening of the aortic valve after the ischaemic event.
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Khelifi N, Blais C, Jean S, Hamel D, Clavel MA, Pibarot P, Mac-Way F. Temporal trends of aortic stenosis and comorbid chronic kidney disease in the province of Quebec, Canada. Open Heart 2022; 9:openhrt-2021-001923. [PMID: 35710290 PMCID: PMC9204438 DOI: 10.1136/openhrt-2021-001923] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/26/2021] [Accepted: 05/04/2022] [Indexed: 11/03/2022] Open
Abstract
OBJECTIVE To investigate temporal trends of chronic kidney disease (CKD) among patients with incident aortic stenosis (AS) and to compare these trends with that of a matched control population. METHODS Using the Quebec Integrated Chronic Disease Surveillance System, we performed a population-based nested case-control study including 108 780 patients newly hospitalised with AS and 543 900 age-matched, sex-matched and fiscal year-matched patients without AS from 2000 to 2016 in Quebec (Canada). Three subgroups were considered. Dialysis subgroup had at least two outpatient billing codes of dialysis. The predialysis subgroup had at least one hospital or two billing diagnostic codes of CKD. The remaining individuals were included in the non-CKD subgroup. We estimated overall and sex-specific standardised annual proportions of CKD subgroups through direct standardisation using the 2016-2017 age structure of the incident AS cohort. The trends overtime were estimated through fitting robust Poisson regression models. Age-specific distribution of AS and control population were assessed for each subgroup. RESULTS From 2000 to 2016, age-standardised proportions of patients with AS with dialysis and predialysis increased by 41% (99% CI 12.0% to 78.1%) and by 45% (99% CI 39.1% to 51.6%), respectively. Inversely, age-standardised proportions of dialysis and pre-dialysis among non-AS patients decreased by 63% (99% CI 55.8% to 68.7%) and by 32% (99% CI 29.9% to 34.6%), respectively, during the same study period. In patients with and without AS, age-standardised annual proportions of males in predialysis were significantly higher than females in most of the study period. Patients with AS on dialysis and predialysis were younger than their respective controls (dialysis: 29.6% vs 45.1% had ≥80 years, predialysis: 60.8% vs 72.7% had ≥80 years). CONCLUSIONS Over time, the proportion of patients with CKD increased significantly and remained consistently higher in incident AS individuals compared with controls. Our results highlight the need to investigate whether interventions targeting CKD risk factors may influence AS incidence in the future.
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Parry M, Van Spall HG, Mullen KA, Mulvagh SL, Pacheco C, Colella TJF, Clavel MA, Jaffer S, Foulds HJ, Grewal J, Hardy M, Price JA, Levinsson AL, Gonsalves CA, Norris CM. The Canadian Women’s Heart Health Alliance Atlas on the Epidemiology, Diagnosis, and Management of Cardiovascular Disease in Women-Chapter 6: Sex- And Gender-Specific Diagnosis and Treatment. CJC Open 2022; 4:589-608. [PMID: 35865023 PMCID: PMC9294990 DOI: 10.1016/j.cjco.2022.04.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2021] [Accepted: 04/12/2022] [Indexed: 10/26/2022] Open
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