Masanori Yamamoto

University Hospital Estaing of Clermont-Ferrand, Clermont, Auvergne, France

Are you Masanori Yamamoto?

Claim your profile

Publications (60)247.65 Total impact

  • [Show abstract] [Hide abstract]
    ABSTRACT: Transcatheter aortic valve implantation (TAVI) performed under local anesthesia (LA) is becoming increasingly common. We aimed to compare the clinical outcomes in patients who underwent transfemoral-TAVI under general anesthesia (GA) and LA.
    Circulation Cardiovascular Interventions 07/2014; · 6.54 Impact Factor
  • [Show abstract] [Hide abstract]
    ABSTRACT: Biomarkers predicting adverse outcomes in non-surgical intensive care patients have not been reported. Data for 1,006 emergency department patients were prospectively analyzed. The serum heart-type fatty acid-binding protein (s-H-FABP) level was measured within 10 min of admission. The patients were assigned to intensive care (n = 835) or other departments (n = 171). The intensive care patients were divided into survivors (n = 745) and non-survivors (n = 90) according to the in-hospital mortality and assigned to four groups according to the quartiles of s-H-FABP (Q1, Q2, Q3 and Q4). The s-H-FABP levels were significantly higher in the intensive care patients (12.7 [6.1-38.8] ng/ml versus 5.3 [3.1-9.4] ng/ml) and in the non-survivors (44.9 [23.2-87.6] ng/ml versus 11.5 [5.6-32.6] ng/ml). A Kaplan-Meier curve showed a significantly higher survival rate in Q3 than in Q1 and Q2 and in Q4 than in the other groups. The multivariate Cox regression model identified Q3 (HR 4.646, 95 % CI 1.526-14.146) and Q4 (HR 9.483, 95 % CI 3.152-28.525) as independent predictors of 90-day mortality. The sensitivity and specificity of H-FABP for in-hospital mortality were 81.1 and 66.0 % (AUC 0.775) at 20.95 ng/ml. The in-hospitality rate was significantly higher in the high s-H-FABP patients than in the low s-H-FABP patients in each etiology group. The s-H-FABP level is an effective biomarker for risk stratification in non-surgical intensive care patients.
    Clinical Research in Cardiology 05/2014; · 3.67 Impact Factor
  • [Show abstract] [Hide abstract]
    ABSTRACT: No scoring system for assessing acute heart failure (AHF) has been reported. Data for 824 AHF patients were analyzed. The subjects were divided into an alive (n=750) and a dead group (n=74). We constructed a predictive scoring system based on eight significant APACHE II factors in the alive group [mean arterial pressure (MAP), pulse, sodium, potassium, hematocrit, creatinine, age, and Glasgow Coma Scale (GCS); giving each one point], defined as the APACHE-HF score. The patients were assigned to five groups by the APACHE-HF score [Group 1: point 0 (n=70), Group 2: points 1 and 2 (n=343), Group 3: points 3 and 4 (n=294), Group 4: points 5 and 6 (n=106), and Group 5: points 7 and 8 (n=11)]. A higher optimal balance was observed in the APACHE-HF between sensitivity and specificity [87.8%, 63.9%; area under the curve (AUC)=0.779] at 2.5 points than in the APACHE II (47.3%, 67.3%; AUC=0.558) at 17.5 points. The multivariate Cox regression model identified belonging to Group 5 [hazard ratio (HR): 7.764, 95% confidence interval (CI) 1.586-38.009], Group 4 (HR: 6.903, 95%CI 1.940-24.568) or Group 3 (HR: 5.335, 95%CI 1.582-17.994) to be an independent predictor of 3-year mortality. The Kaplan-Meier curves revealed a poorer prognosis, including all-cause death and HF events (death, readmission-HF), in Group 5 and Group 4 than in the other groups, in Group 3 than in Group 2 or Group 1, and in Group 2 than in Group 1. The new scoring system including MAP, pulse, sodium, potassium, hematocrit, creatinine, age, and GCS (APACHE-HF) can be used to predict adverse outcomes of AHF.
    Journal of Cardiology 04/2014; · 2.30 Impact Factor
  • [Show abstract] [Hide abstract]
    ABSTRACT: Background: Tolvaptan, an oral selective vasopressin 2 receptor antagonist that acts on the distal nephrons to cause a loss of electrolyte-free water, is rarely used during the acute phase of acute heart failure (AHF). Methods and Results: We investigated 183 AHF patients admitted to the intensive care unit and administered tolvaptan (7.5mg) with continuous intravenous furosemide, and then additionally at 12-h intervals until HF was compensated. When intravenous furosemide was changed to peroral use, the administration of tolvaptan was stopped. The patients were assigned to tolvaptan (n=52) or conventional treatment (n=131) groups. The amount of intravenous furosemide was significantly lower (35.4 [16.3-56.0] mg vs. 80.0 [30.4-220.0] mg), the urine volume was significantly higher on days 1 and 2 (3,691 [3,109-4,198] ml and 2,953 [2,128-3,592] ml vs. 2,270 [1,535-3,258] ml and 2,129 [1,407-2,906] ml) and the numbers of patients with worsening-AKI (step-up RIFLE Class to I or F) and Class F were significantly fewer (5.8% and 1.9% vs. 19.1% and 16.0%) in the tolvaptan group than in the conventional group, respectively. One of the specific medications indicated worsening-AKI and in-hospital mortality was tolvaptan (odds ratio [OR] 0.155, 95% confidence interval [CI] 0.037-0.657 and OR 0.191, 95% CI 0.037-0.985). The Kaplan-Meier curves showed that the death rate within 6 months was significantly lower in the tolvaptan group. The same result was found after propensity matching of the data. Conclusions: Early administration of tolvaptan could prevent exacerbation of AKI and improve the prognosis for AHF patients.
    Circulation Journal 02/2014; · 3.58 Impact Factor
  • [Show abstract] [Hide abstract]
    ABSTRACT: There have been few reports discussing the clinical significance of the season of admission of acute heart failure (AHF) patients. The data of 661 patients with AHF admitted to the intensive care unit were analyzed. Patients were assigned to a summer admission (Group-S, n = 113, between July and September), a winter admission (Group-W, n = 214, between December and February), or to the other seasons admission group (Group-O, n = 334). We evaluated the relationships between the seasonal variations and the clinical profiles, and the long-term prognosis. There were significantly more patients with cardiomyopathy and New York Heart Association class 4, and the serum levels of total bilirubin were significantly higher in Group-S (85.8, 24.8 %, and 0.60 [0.50-0.90]) than in Group-W (75.2, 15.4 %, and 0.60 [0.40-0.78]). The left ventricular ejection fraction on admission was significantly reduced and intravenous administration of dobutamine was used more frequently in Group-S (30.0 [25.0-46.0], 31.9 %) than in Group-W (34.4 [25.2-48.0], 20.6 %) and Group-O (35.0 [25.0-46.0], 19.8 %). The multivariate Cox regression model found that summer admission was independently associated with cardiovascular death (HR: 1.58, 95 % CI 1.01-2.48; p = 0.044) and heart failure (HF) events (HR: 1.55, 95 % CI 1.05-2.28; p = 0.028). The Kaplan-Meier curves showed that the cardiovascular death rate was significantly higher in Group-S than in Group-W and Group-O, and the HF events were significantly higher in Group-S than in Group-O. The summer admission AHF patients included sicker patients, and the prognosis in these patients was worse than in the patients admitted at other times.
    Heart and Vessels 01/2014; · 2.13 Impact Factor
  • [Show abstract] [Hide abstract]
    ABSTRACT: Background Although transcatheter aortic valve implantation has been developing as an alternative treatment in elderly patients with high surgical risk, age-specific differences in clinical outcome have not been fully validated. Methods Data were analyzed for 2,254 patients at least 80 years old who were enrolled between January 2010 and October 2011 in the French national transcatheter aortic valve implantation registry, FRANCE-2. Procedural and clinical outcomes defined according to the Valve Academic Research Consortium criteria were compared among subjects in three age groups: 80 to 84 years (n = 867), 85 to 89 years (n = 1,064), and at least 90 years (n = 349; range, 90 to 101 years). Results The self-expandable prosthesis was implanted in 710 patients, and the balloon-expandable prosthesis was implanted in 1,544 patients. No differences were observed in rates of procedural success, Valve Academic Research Consortium–defined complications, and length of hospitalization among groups. Cumulative 30-day mortalities did not change among the three groups (80 to 84 years, 10.3% versus 85 to 89 years, 9.5% versus ≥90 years, 11.2%; p = 0.53). Cumulative 1-year mortalities also showed no statistical differences, although the mortality rate was higher in patients 85 to 89 years old and at least 90 years old compared with those 80 to 84 years old (19.8% versus 26.1% versus 27.7%; p = 0.16). After adjustment for differential baseline characteristics and potential confounders, patient age (85 to 89 years and ≥90 years compared with 80 to 84 years) was not associated with increasing risk of 30-day mortality (hazard ratio, 0.92, 1.26; 95% confidence interval, 0.66 to 1.27, 0.83 to 1.94; p = 0.38, 0.28, respectively) and 1-year mortality (hazard ratio, 1.16, 1.36; 95% confidence interval, 0.90 to 1.49, 0.97 to 1.89; p = 0.25, 0.073, respectively). Conclusions This study revealed acceptable clinical results of transcatheter aortic valve implantation even in very elderly populations.
    The Annals of thoracic surgery 01/2014; 97(1):29–36. · 3.45 Impact Factor
  • International journal of cardiology 12/2013; · 6.18 Impact Factor
  • [Show abstract] [Hide abstract]
    ABSTRACT: The "obesity paradox" that patients with high body mass index (BMI) have good prognoses remains controversial. This study aimed to assess the impact of BMI on clinical outcomes in patients who underwent transcatheter aortic valve implantation (TAVI). Data from the French national TAVI registry were collected for 3,072 patients who underwent TAVI from January 2010 to October 2011. The patients were categorized into 4 groups according to BMI (kg/m(2)): underweight (<18.5 kg/m(2)), normal weight (18.5 to 25 kg/m(2)), overweight (25 to 30 kg/m(2)), and obese (>30 kg/m(2)). Thereafter, clinical outcomes were compared among the 4 groups. The BMI distribution was 3.1% (n = 95), 44.1% (n = 1,355), 34.2% (n = 1,050), and 18.6% (n = 572). Although the 4 groups greatly differed in baseline clinical background, they had similar procedural success rates (95.8%, 97.1%, 97.3%, and 95.6%, p = 0.23). Major vascular complication was significantly associated with the underweight patients after adjusting for the other potential confounders (odds ratio 2.33, 95% confidence interval 1.17 to 4.46, p = 0.016). The cumulative postoperative survival rates were increasing across the 4 groups at 30 days (83.2%, 88.9%, 91.6%, and 93.0%, p = 0.003) and 1 year (67.9%, 73.6%, 77.4%, and 80.3%, p = 0.006). In a multivariate Cox regression analysis, the overweight and obese patients were independently associated with superior cumulative survival rate at 1 year (hazard ratios 0.74 and 0.71, 95% confidence intervals 0.57 to 0.97 and 0.59 to 0.87, p = 0.050 and 0.029, respectively). In conclusion, major morbidity and 1-year mortality were less in overweight and obese patients than those classified as normal weight even in a TAVI cohort.
    The American journal of cardiology 09/2013; · 3.58 Impact Factor
  • Journal of Cardiology Cases 07/2013; 8(1):e7–e8.
  • [Show abstract] [Hide abstract]
    ABSTRACT: The aim of this study was to compare the outcomes of transcatheter aortic valve implantation using the Edwards SAPIEN valve and the Medtronic CoreValve in patients with annulus of intermediate size (20 to 25 mm). From October 2008 to April 2012, 662 consecutive patients who underwent transcatheter aortic valve implantation were studied at 2 French centers. After propensity score matching, a total of 192 patients with intermediate-sized aortic annulus who had received either Edwards (n = 96, mean age 82.4 ± 7.9 years, 48% men, 61.9% receiving the 26-mm valve) or CoreValve (n = 96, mean age 82.5 ± 7.7 years, 50% men, 64.6% receiving the 29-mm valve) prostheses through the transfemoral approach were studied. Adequate reduction in postprocedural mean pressure gradients was achieved with the Edwards valve and the CoreValve (10.9 ± 4.7 vs 9.1 ± 4.4 mm Hg, respectively, p <0.01). Major vascular complications (5.2% vs 3.1%, p = 0.36), device success (95.8% vs 93.8%, p = 0.52), and 30-day survival (90.6% vs 89.6%, p = 0.81) were similar. The incidence of postprocedural aortic regurgitation grade ≥2/4 and new pacemaker implantation was more frequent in the CoreValve group (14.3% vs 35.5%, p <0.01, and 4.2% vs 18.8%, p <0.01, respectively). There was no significant difference in 1-year cumulative survival rates in the Edwards valve group compared with the CoreValve group (80.1 ± 4.2% vs 75.6 ± 4.9%, log-rank p = 0.31). In conclusion, in patients with annulus of intermediate size, similar device success and short-term and midterm outcomes were achieved with either of the valves, irrespective of the specific complications related to each valve.
    The American journal of cardiology 06/2013; · 3.58 Impact Factor
  • [Show abstract] [Hide abstract]
    ABSTRACT: OBJECTIVES: The aim of this study was to assess the influence of chronic kidney disease (CKD) classification on clinical outcomes in patients undergoing transcatheter aortic valve implantation (TAVI). BACKGROUND: The prognostic value of impaired renal function according to CKD classification has not been thoroughly investigated in very elderly TAVI cohorts. METHODS: Data of 642 consecutive patients who underwent TAVI were prospectively collected. We compared the clinical outcomes of enrolled patients divided into CKD 1+2, CKD 3a, CKD 3b, and CKD 4 based on the estimated glomerular filtration rate: ≥60, 45-59, 30-44, and 15-29 ml/min/1.73m(2), respectively. RESULTS: Among the study patients [mean age: 83.5±6.5 years, logistic EuroSCORE: 20.0 (13.6-28.8), 34.0% were categorized as CKD 1+2 (n=218), 28.3% CKD 3a (n=182), 28.2% CKD 3b (n=181), and 9.5% CKD 4 (n=61)]. Both the 30-day and cumulative 1-year mortality rates increased significantly across the 4 groups (6.9% vs. 8.8% vs. 13.3% vs. 26.2%; p=0.002 and 17.2% vs. 23.4% vs. 29.2% vs. 47.8%; p<0.001, respectively). After adjustment for considerable influential confounders in COX-regression multivariate model, CKD 4 was associated with an increased risk of 30-day mortality (HR: 3.04, 95%CI: 1.43-6.49, p=0.004), and CKD 3b and 4 were related to increased cumulative 1-year mortality (HR: 1.71, 2.91; 95%CI: 1.09-2.68, 1.73-4.90; p=0.020, <0.001, respectively) when compared to CKD 1+2 as reference. CONCLUSIONS: Classification of CKD stages before TAVI allows risk stratification for early and mid-term clinical outcome. TAVI for CKD 4 patients is still considered challenging due to high mortality rates after procedure.
    Journal of the American College of Cardiology 05/2013; · 14.09 Impact Factor
  • [Show abstract] [Hide abstract]
    ABSTRACT: OBJECTIVES: This study sought to assess whether the volume of contrast media (CM) influences the occurrence of acute kidney injury (AKI) following transcatheter aortic valve implantation (TAVI). BACKGROUND: The volume of CM has been shown to be associated with increasing risk of AKI; however, in a high-risk elderly TAVI population, the predictive value and optimal threshold of CM dose on AKI remain uncertain. METHODS: Data of 415 consecutive transfemoral TAVI patients (age 83.6 ± 6.8 years, logistic EuroSCORE 23.0 ± 12.2%) were analyzed. AKI was defined by Valve Academic Research Consortium criteria. Based on a previous formula, the ratio of CM to serum creatinine (SCr) and body weight (BW) (CM × SCr/BW) was calculated as defining the degree of CM use. The association between CM dose and incidence of AKI, as well as predictive factors and prognosis of AKI, were investigated. RESULTS: AKI occurred in 63 patients (15.2%). Cumulative 1-year mortality showed significant differences between the AKI and non-AKI groups (47.9% vs. 15.7%, p < 0.001). Mean CM × SCr/BW ratio was higher in the AKI group than in the non-AKI group (4.1 ± 2.9 vs. 2.9 ± 1.6, p < 0.001). By multivariate analysis, CM × SCr/BW per 1.0 increase, ejection fraction <40%, and transfusion were associated with the occurrence of AKI (odds ratio [OR]: 1.16; 95% confidence interval [CI]: 1.03 to 1.20; p = 0.017, OR: 3.01; 95% CI: 1.49 to 5.00; p = 0.001, OR: 2.73; 95% CI: 1.54 to 6.15; p = 0.001, respectively). A threshold value of CM × SCr/BW for predicting AKI was statistically identified as 2.7. CONCLUSIONS: Although mechanisms of AKI following TAVI are multifactorial, the present study identified a relationship between CM dose increment and high prevalence of AKI. Therapeutic efforts not to exceed the threshold value may reduce the risk of AKI.
    JACC. Cardiovascular Interventions 05/2013; 6(5):479-486. · 1.07 Impact Factor
  • [Show abstract] [Hide abstract]
    ABSTRACT: BACKGROUND: Relationships between plaque morphology on optical coherence tomography (OCT) and biomarker levels in the patients with acute coronary syndrome (ACS) have not been fully investigated. METHODS: ACS patients (n=128) were prospectively enrolled and their plasma levels of soluble lectin-like oxidized LDL receptor-1 (sLOX-1), high-sensitivity C-reactive protein (hs-CRP), and high-sensitivity troponin T (hs-TnT) were measured. Another set of 20 patients with stable angina pectoris (SAP) without plaque rupture or erosion served as controls. Among 128 ACS patients, 75 patients underwent OCT procedure to evaluate culprit plaque morphology, and were categorized into two groups; ACS with plaque rupture (ruptured ACS; R-ACS, n=54) and ACS without plaque rupture (non-ruptured ACS; N-ACS, n=21). RESULTS: Levels of sLOX-1 (p<0.001), hs-CRP (p=0.048) and hs-TnT (p<0.001) were significantly higher in R-ACS than SAP. Levels of sLOX-1 were also significantly higher in R-ACS than in N-ACS (p<0.001); whereas levels of hs-CRP (p=0.675), as well as those of hs-TnT (p=0.055), were comparable between R-ACS and N-ACS. Comparison of receiver operating characteristic (ROC) curves among sLOX-1, hs-CRP and hs-TnT to differentiate R-ACS from N-ACS revealed that the area under the curve (AUC) values of sLOX-1, hs-CRP and hs-TnT were 0.782, 0.531 and 0.643, respectively. ROC curves, generated for these biomarkers, to differentiate ACS with thin-cap fibroatheroma (TCFA) from those without demonstrated that the AUC values of sLOX-1, hs-CRP and hs-TnT were 0.718, 0.506 and 0.524, respectively. CONCLUSION: sLOX-1, but not hs-CRP or hs-TnT, can differentiate ACS with plaque rupture from those without, and ACS with TCFA from those without.
    International journal of cardiology 04/2013; · 6.18 Impact Factor
  • International journal of cardiology 04/2013; · 6.18 Impact Factor
  • [Show abstract] [Hide abstract]
    ABSTRACT: Transcatheter aortic valve implantation (TAVI) is effective in treating severe aortic stenosis in high-risk surgical patients. We evaluated the value of the QRS duration (QRSd) in predicting the mid-term morbidity and mortality after TAVI. We conducted a prospective cohort study of 91 consecutive patients who underwent TAVI using the CoreValve at our teaching hospital cardiology unit in 2008 to 2010 who survived to hospital discharge; 57% were women, and their mean age was 84 ± 7 years. The QRSd at discharge was used to classify the patients into 3 groups: QRSd ≤120 ms, n = 18 (20%); QRSd >120 ms but ≤150 ms, n = 30 (33%); and QRSd >150 ms, n = 43 (47%). We used 2 end points: (1) all-cause mortality and (2) all-cause mortality or admission for heart failure. After a median of 12 months, the normal-QRSd patients showed a trend toward, or had, significantly better overall survival and survival free of admission for heart failure compared with the intermediate-QRSd group (p = 0.084 and p = 0.002, respectively) and the long-QRSd group (p = 0.015 and p = 0.001, respectively). The factors significantly associated with all-cause mortality were the Society of Thoracic Surgeons score, aortic valve area, post-TAVI dilation, acute kidney injury, hospital days after TAVI, and QRSd at discharge. On multivariate analysis, QRSd was the strongest independent predictor of all-cause mortality (hazard ratio 1.036, 95% confidence interval 1.016 to 1.056; p <0.001) and all-cause mortality or heart failure admission (hazard ratio 1.025, 95% confidence interval 1.011 to 1.039; p <0.001). The other independent predictors were the Society of Thoracic Surgeons score, acute kidney injury, and post-TAVI hospital days. In conclusion, a longer QRSd after TAVI was associated with greater morbidity and mortality after 12 months. The QRSd at discharge independently predicted mortality and morbidity after TAVI.
    The American journal of cardiology 03/2013; · 3.58 Impact Factor
  • [Show abstract] [Hide abstract]
    ABSTRACT: Decrease in blood platelet count has been described after percutaneous coronary intervention and surgical valve replacement, although no study has been performed in the setting of transcatheter aortic valve implantation (TAVI). The aim of this study was to address the incidence, mechanism, and impact of blood platelet count decrease after TAVI. One hundred forty-four consecutive patients (mean age 84 ± 7 years, 64 men) with severe symptomatic aortic stenosis who underwent TAVI from December 2007 to July 2011 were enrolled. Blood platelet count was recorded before and after aortic valve implantation. Decrease in blood platelet count was compared with in-hospital major adverse cardiovascular events (death, stroke, and major or life-threatening bleeding). Blood platelet count decreases occurred in all but 1 patient. The percentage of platelet count decrease averaged 34 ± 15% and was 24% greater than blood protein decrease. Decrease in platelet count was associated with a higher rate of prosthesis migration, longer x-ray and procedural times, and larger contrast amounts (230 ± 128 ml for the third tertile vs 170 ± 77 ml for the second and first tertiles, p = 0.0006), but no association was observed with regard to changes in bilirubin. In-hospital major adverse cardiovascular events (n = 50 [35%]) were observed more frequently in patients with severe platelet count decreases (21% for the first tertile, 35% for the second tertile, and 48% for the third tertile, p = 0.02). Finally, the percentage of blood platelet count decrease was the only predictor of in-hospital major adverse cardiovascular events (odds ratio 1.67, 95% confidence interval 1.05 to 2.67, p = 0.03). In conclusion, a decrease in platelet count is a common phenomenon after TAVI, and its severity is associated with poor outcomes.
    The American journal of cardiology 03/2013; · 3.58 Impact Factor
  • Source
    [Show abstract] [Hide abstract]
    ABSTRACT: OBJECTIVE To determine if prediabetes is associated with atherosclerosis of coronary arteries, we evaluated the degree of coronary atherosclerosis in nondiabetic, prediabetic, and diabetic patients by using coronary angioscopy to identify plaque vulnerability based on yellow color intensity.RESEARCH DESIGN AND METHODS Sixty-seven patients with coronary artery disease (CAD) underwent angioscopic observation of multiple main-trunk coronary arteries. According to the American Diabetes Association guidelines, patients were divided into nondiabetic (n = 16), prediabetic (n = 28), and diabetic (n = 23) groups. Plaque color grade was defined as 1 (light yellow), 2 (yellow), or 3 (intense yellow) based on angioscopic findings. The number of yellow plaques (NYPs) per vessel and maximum yellow grade (MYG) were compared among the groups.RESULTSMean NYP and MYG differed significantly between the groups (P = 0.01 and P = 0.047, respectively). These indexes were higher in prediabetic than in nondiabetic patients (P = 0.02 and P = 0.04, respectively), but similar in prediabetic and diabetic patients (P = 0.44 and P = 0.21, respectively). Diabetes and prediabetes were independent predictors of multiple yellow plaques (NYPs ≥2) in multivariate logistic regression analysis (odds ratio [OR] 10.8 [95% CI 2.09-55.6], P = 0.005; and OR 4.13 [95% CI 1.01-17.0], P = 0.049, respectively).CONCLUSIONS Coronary atherosclerosis and plaque vulnerability were more advanced in prediabetic than in nondiabetic patients and comparable between prediabetic and diabetic patients. Slight or mild disorders in glucose metabolism, such as prediabetes, could be a risk factor for CAD, as is diabetes itself.
    Diabetes care 12/2012; · 7.74 Impact Factor
  • [Show abstract] [Hide abstract]
    ABSTRACT: In a fraction of patients aged ≥90 years, less-invasive transcatheter aortic valve implantation (TAVI) has been considered a therapeutic option for aortic stenosis under careful clinical screening. However, the safety and effectiveness using TAVI in such a population has not been fully elucidated. The aim of the present study was to investigate the feasibility of TAVI in nonagenarians. We prospectively enrolled 136 consecutive patients with severe aortic stenosis who were referred for TAVI. The procedural, early, and midterm clinical outcomes were compared between patients aged <90 years (n = 110, average age 82.3 ± 8.3 years) and ≥90 years (n = 26; average age 91.6 ± 1.9 years). A comparison of the baseline characteristics revealed that among patients aged ≥90 years, the prevalence of women (50% vs 81%, p <0.001) and the mean aortic valve gradient (45.5 ± 15.4 vs 56.3 ± 23.4 mm Hg, p = 0.005) were greater than those in patients aged <90 years. Major vascular complications occurred more frequently in patients ≥90 years (5% vs 19%, p = 0.022), although the rate of procedural success and 30-day and 6-month mortality were not different between the 2 age groups (96% vs 100%, p = 0.58; 6% vs 15%, p = 0.22; and 14% vs 27%, p = 0.14, respectively). The mortality rates were greater among patients aged ≥90 years. At 6 months, both groups of survivors were similar in symptom status, with a New York Heart Association classification less than class II (89% vs 84%, p = 0.68). The cumulative survival (median 13.4 ± 8.0 months of follow-up) was not significantly different between the 2 age groups (p = 0.22, log-rank test). In conclusion, even very elderly nonagenarians can experience acceptable clinical results and benefits after TAVI.
    The American journal of cardiology 10/2012; 110(8):1156-63. · 3.58 Impact Factor
  • [Show abstract] [Hide abstract]
    ABSTRACT: The present study sought to assess the effectiveness of local anesthesia with conscious sedation (LACS) during transcatheter aortic valve implantation (TAVI). On its introduction, TAVI was mostly performed with the patient under general anesthesia (GA); however, evidence supporting the use of less-invasive LACS has been increasing. The data from 174 consecutive patients who underwent TAVI by way of the femoral artery from December 2007 to December 2011 were analyzed. GA was mainly used in early phase of the study (n = 44); this was gradually shifted to LACS in the late phase (n = 130). The clinical outcomes were compared for those patients who received GA versus LACS. The incidence and causes of "LACS failure," defined as conversion to GA from LACS during TAVI, were also assessed. The rates of procedural success and 30-day mortality were not different between the 2 groups (93.3% vs 95.3%, p = 0.60; 6.7% vs 7.8%, p = 0.55, respectively). Although the clinical backgrounds of the patients showed differences, these results were not significant after adjusting for other influential confounders. The intensive care unit stay and hospital stay were longer in the GA group than in the LACS group (3.9 ± 2.2 vs 3.3 ± 1.5 days, p = 0.044; and 12.2 ± 8.3 vs 8.1 ± 6.5 days, p = 0.001, respectively). LACS failure occurred in 6 patients (4.6%), and the causes were multifactorial, as follows: cardiac tamponade in 2, cardiac arrest in 2, myocardial infarction in 1, and stroke in 1. In conclusion, transfemoral TAVI with the patient under LACS could be successfully performed in most patients, with the advantage of early recovery, although the perioperative risks involved in the TAVI procedure should be considered.
    The American journal of cardiology 10/2012; · 3.58 Impact Factor
  • [Show abstract] [Hide abstract]
    ABSTRACT: OBJECTIVE: To identify clinical and electrical factors predicting delayed high degree atrio-ventricular block (AVB) after transcatheter aortic valve implantation (TAVI). BACKGROUND: TAVI is a new technique for treating severe aortic valve stenosis in patients at high surgical risk but can be followed by high grade AVB requiring permanent pacing. METHODS AND RESULTS: The study included 79 patients (82±17 years, Euroscore=23±10 %) free of permanent pacing need before and immediately after TAVI procedure. Delayed high degree AVB was defined by type 2 or 3 AVB diagnosed at least 24 hours after the index procedure. Permanent pace maker implantation was performed for all these patients. We compared clinical and electrical variables before and after TAVI in patients with delayed AVB or not. TAVI was performed successfully in all patients. The 21 (26%) patients who exhibited delayed high grade AVB had significantly deeper prosthesis implantation (12±4 mm vs. 9±5 mm, P=0.03) and wider post-TAVI QRS duration (155±17 ms vs. 131±25 ms, P=0.0004), with no difference in baseline QRS duration. Post-TAVI QRS duration was the only independent predictor of post-TAVI permanent for delayed high degree AVB (P=0.02). After a mean follow-up of 10±8 months, all 21 patients with post-TAVI QRS ≤128 ms were free of high-grade AVB, while 21/55 (38%) patients with post-TAVI QRS >128 ms had permanent pacing (P=0.0016). CONCLUSION: Delayed ( 24 hours after the procedure) high-grade AVB necessitating permanent pacing is common after TAVI. QRS duration measured immediately after TAVI was the best independent predictor of permanent pacing in this population. Patients with QRS ≤128 ms immediately after TAVI had no risk of requiring permanent pacing. © 2012 Wiley Periodicals, Inc.
    Catheterization and Cardiovascular Interventions 09/2012; · 2.51 Impact Factor

Publication Stats

462 Citations
247.65 Total Impact Points


  • 2014
    • University Hospital Estaing of Clermont-Ferrand
      Clermont, Auvergne, France
  • 2007–2014
    • Nippon Medical School
      • • Intensive and Cardiac Care Unit
      • • Division of Cardiology
      • • Department of Internal Medicine
      Edo, Tōkyō, Japan
  • 2013
    • Edogawa Hospital
      Edo, Tōkyō, Japan
  • 2012
    • Hôpital Henri Mondor (Hôpitaux Universitaires Henri Mondor)
      Créteil, Île-de-France, France