Takeshi Kitai

Dr. Takeshi Kitai

orcid

Research Focus & Metrics

Academic Career Length

20Years (2007-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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30 November 2020 in European Journal of Preventive Cardiology
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Journal Article
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MKMasaaki Konishi
Masaaki Konishi
NKNobuyuki Kagiyama
Nobuyuki Kagiyama
KKKentaro Kamiya
Kentaro Kamiya
HSHiroshi Saito
Hiroshi Saito
KSKazuya Saito
Kazuya Saito
YMYuya Matsue
Yuya Matsue
Sarcopenia, one of the extracardiac factors for reduced functional capacity and poor outcome in heart failure (HF), may act differently between HF with preserved ejection fraction (HFpEF) and HF with reduced ejection fraction (HFrEF). We sought to investigate the impact of sarcopenia on mortality in HFpEF and HFrEF. We performed a post hoc analysis of a multicentre prospective cohort study, including 942 consecutive older (age ≥65 years) hospitalized patients: 475 with HFpEF (ejection fraction ≥45%, age 81 ± 7 years, 48.8% men) and 467 with HFrEF (ejection fraction <45%, age 78 ± 8 years, 68.1% men). Sarcopenia was diagnosed according to the international criteria incorporating muscle strength (handgrip strength), physical performance (gait speed), and skeletal muscle mass (appendicular skeletal mass). The HFpEF group consisted of fewer patients with low appendicular skeletal muscle mass index measured using bioelectrical impedance analysis [<7.0 kg/m2 (men) and <5.7 (women); 22.1% vs. 31.0%, P = 0.003], and more patients with low handgrip strength [<26 kg (men) and <18 (women); 67.8% vs. 55.5%, P < 0.001], and slow gait speed [<0.8 m/s (both sexes); 54.5% vs. 41.1%, P < 0.001] than the HFrEF group, resulting in a similar sarcopenia prevalence in the two groups (18.1% vs. 21.6%, P = 0.191). Sarcopenia was an independent predictor of 1-year mortality in both HFpEF and HFrEF [hazard ratio (95% confidence interval) 2.42 (1.36–4.32), P = 0.003 in HFpEF and 2.02 (1.08–3.75), P = 0.027 in HFrEF; P for interaction = 0.666] after adjustment for other predictors. In older patients with HF, sarcopenia contributes to mortality similarly in HFpEF and HFrEF.

6 July 2017 in Cardiovascular Diabetology
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Journal Article
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Andrew XanthopoulosAndrew Xanthopoulos
Andrew Xanthopoulos
GGGrigorios Giamouzis
Grigorios Giamouzis
AMAndreas Melidonis
Andreas Melidonis
TKTakeshi Kitai
Takeshi Kitai
EPEfi Paraskevopoulou
Efi Paraskevopoulou
JSJohn Skoularigis
John Skoularigis
Red blood cell distribution width (RDW) is an established prognostic marker in acute and chronic heart failure (HF). Recent studies have pointed out a link among RDW, diabetes mellitus (DM) and inflammation. We sought to investigate the prognostic value and longitudinal pattern of RDW in patients with concomitant HF and DM, which remains unknown. A total of 218 patients (71 diabetics) who presented with acute HF had RDW measured at admission, discharge and 4, 8 and 12 months post-discharge. The study endpoint was all-cause mortality or rehospitalization for HF during 1-year follow-up. The study endpoint was met in 33 patients (46.5%) with DM and in 54 patients (36.7%) without DM. RDW at admission was associated with higher event rate both in HF patients with and without DM (adjusted HR: 1.349, p = 0.002, 95% CI 1.120–1.624 and adjusted HR: 1.142, p = 0.033, 95% CI 1.011–1.291 respectively). In addition, a significant interaction was found between diabetes and RDW longitudinal changes (βinteraction = −0.002; SE = 0.001; p = 0.042). Despite the similar prognostic significance of RDW in diabetic and non-diabetic HF patients regarding the study endpoint, longitudinal changes were found to be significantly different between these two groups of HF patients. This might be due to the higher inflammatory burden that diabetic HF patients carry and may provide new insights to the pathophysiological mechanism of RDW increase in HF, which remains unknown.

29 June 2022 in European Heart Journal
Verified
Journal Article
Closed access
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TNTakeru Nabeta
Takeru Nabeta
TKTakeshi Kitai
Takeshi Kitai
YNYoshihisa Naruse
Yoshihisa Naruse
TTTatsunori Taniguchi
Tatsunori Taniguchi
KYKenji Yoshioka
Kenji Yoshioka
YMYuya Matsue
Yuya Matsue
This study evaluated the prognosis and prognostic factors of patients with cardiac sarcoidosis (CS), an underdiagnosed disease. Patients from a retrospective multicentre registry, diagnosed with CS between 2001 and 2017 based on the 2016 Japanese Circulation Society or 2014 Heart Rhythm Society criteria, were included. The primary endpoint was a composite of all-cause death, hospitalization for heart failure, and documented fatal ventricular arrhythmia events (FVAE), each constituting exploratory endpoints. Among 512 registered patients, 148 combined events (56 heart failure hospitalizations, 99 documented FVAE, and 49 all-cause deaths) were observed during a median follow-up of 1042 (interquartile range: 518–1917) days. The 10-year estimated event rates for the primary endpoint, all-cause death, heart failure hospitalizations, and FVAE were 48.1, 18.0, 21.1, and 31.9%, respectively. On multivariable Cox regression, a history of ventricular tachycardia (VT) or fibrillation [hazard ratio (HR) 2.53, 95% confidence interval (CI) 1.59–4.00, P < 0.001], log-transformed brain natriuretic peptide (BNP) levels (HR 1.28, 95% CI 1.07–1.53, P = 0.008), left ventricular ejection fraction (LVEF) (HR 0.94 per 5% increase, 95% CI 0.88–1.00, P = 0.046), and post-diagnosis radiofrequency ablation for VT (HR 2.65, 95% CI 1.02–6.86, P = 0.045) independently predicted the primary endpoint. Although mortality is relatively low in CS, adverse events are common, mainly due to FVAE. Patients with low LVEF, with high BNP levels, with VT/fibrillation history, and requiring ablation to treat VT are at high risk. Clinical characteristics, findings on cardiovascular imaging, prognosis, and prognostic factors in patients with cardiac sarcoidosis: summary results of ILLUMINATE-CS.

28 November 2017 in Journal of Cardiothoracic Surgery
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Journal Article
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NNNatsumi Nomoto
Natsumi Nomoto
TTTomoko Tani
Tomoko Tani
TKToshiko Konda
Toshiko Konda
KKKitae Kim
Kitae Kim
TKTakeshi Kitai
Takeshi Kitai
YFYutaka Furukawa
Yutaka Furukawa
The frequency of primary cardiac tumors is rare at about 0.3% by autopsy. Our objective was to investigate the characteristics and locations of cardiac tumors and to provide a prognostic analysis in our hospital. We collected data on 95 patients with echocardiographic diagnosis or detection of cardiac tumors in a prospective analysis from 1999 to 2014. The median follow-up period was 43 months (0.5–183 months). The subjects included 56 men and 39 women with a mean age of 65 years. Clinical diagnosis revealed primary tumors in 61 patients (64%) and secondary metastatic tumors in 34 patients (36%). In the 61 patients, 41 patients (67%) underwent surgery and tissue samples were obtained. Of these 41 patients, benign tumors were found in 30 cases (73%). One patient (2%) was diagnosed with thrombus. Among the benign tumors, myxoma (67%) was the most common type followed by papillary fibroelastoma (23%). The most common site was the left atrium (35%) followed by the right atrium (25%). Primary malignant tumors were diagnosed in 10 cases (24%), including 6 angiosarcomas, 3 lymphomas, and 1 leiomyosarcoma. The diagnostic accuracy of echocardiography was 80%. The patients with benign tumors were all alive at the end of the follow-up period. In contrast, 7 patients with malignant tumors died (70%) (p < 0.0001). Our data is in line with previous literature. Our study also suggests the necessity of extending our knowledge of the characteristics of cardiac tumors for diagnosis.

19 August 2021 in Journal of Clinical Medicine
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Journal Article
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FTFilippos Triposkiadis
Filippos Triposkiadis
Andrew XanthopoulosAndrew Xanthopoulos
Andrew Xanthopoulos
ABAlexandra Bargiota
Alexandra Bargiota
TKTakeshi Kitai
Takeshi Kitai
NKNiki Katsiki
Niki Katsiki
EIEfstathios Iliodromitis
Efstathios Iliodromitis
Diabetes mellitus (DM) is a major risk factor for new-onset heart failure (HF) and vice versa. The pathogenesis of new-onset HF in DM is complex and has been largely attributed to the toxic cardiovascular effects of hyperglycemia and relevant metabolic abnormalities (diabetic cardiomyopathy) as well as the frequently coexisting morbidities such as hypertension (HTN), coronary artery disease (CAD), and diabetic nephropathy. In patients with type 1 DM (T1DM), HF develops in the setting of a dysregulated immune response, whereas in most patients with type 2 DM (T2DM), against a background of overweight/obesity. HF prevention in DM is feasible with rigorous treatment of cardiovascular risk factors and selective antidiabetic agents. Conversely, development of new-onset T2DM in HF (cardiogenic DM) is common and has been attributed to an increase in the resistance to insulin, especially in the skeletal muscle, liver, and adipose tissue as well as in diminished insulin secretory response to hyperglycemia by pancreatic β-cells. Cardiogenic DM further deteriorates cardiac dysfunction and adversely affects outcome in HF. Novel lifesaving medications employed in HF management such as sacubitril/valsartan and sodium glucose cotransporter 2 inhibitors (SGLT-2i) have a favorable metabolic profile and lower the incidence of cardiogenic diabetes. Whether mitigation of cardiogenic DM should be a treatment target in HF deserves further investigation.

27 September 2011 in Heart
Verified
Journal Article
Closed access
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TKTakeshi Kitai
Takeshi Kitai
SHSatoshi Honda
Satoshi Honda
YOYukikatsu Okada
Yukikatsu Okada
TTTomoko Tani
Tomoko Tani
KKKitae Kim
Kitae Kim
YFYutaka Furukawa
Yutaka Furukawa
Objective: The management of asymptomatic severe and very severe aortic stenosis (AS) remains unestablished. This study aimed to investigate the clinical outcomes of severe versus very severe AS patients. Design: A single centre, retrospective cohort study. Patients and Methods: The study retrospectively reviewed 108 conservatively treated patients with severe AS (a maximal jet velocity ≥4.0 m/s, or mean aortic pressure gradient (MPG) ≥40 mm Hg, or an aortic valve area (AVA) <1.0 cm2) and 58 patients with very severe AS (a maximal jet velocity ≥5.0 m/s, or MPG ≥50 mm Hg or an AVA <0.6 cm2). Clinical outcomes were compared between the two groups, considering the existence of symptoms. Main Outcome Measures: All-cause mortality and valve-related event, defined by a composite of cardiac death and hospitalisation because of heart failure. Results: Mean follow-up was 5.5±3.1 years. Fifty-six patients (52%) with severe AS and 20 patients (34%) with very severe AS were asymptomatic. Very severe AS had poorer survival and valve-related event-free survival than severe AS at 3 years (77% vs 88%, p<0.01; 75% vs 88%, p<0.001, respectively). In addition, the 3-year survival and valve-related event-free survival of asymptomatic very severe AS were comparable with symptomatic severe AS, but they were significantly worse than asymptomatic severe AS (p<0.01 and p<0.001, respectively). Conclusions: Surgery should always be considered in very severe AS regardless of symptoms, and particular attention needs to be paid to their extremely poor outcomes.