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Cuspidi C, Gherbesi E, Sala C, Tadic M. Sex, gender, and subclinical hypertensiveorgan damage-heart. J Hum Hypertens 2023; 37:626-633. [PMID: 36030347 DOI: 10.1038/s41371-022-00750-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2022] [Revised: 08/01/2022] [Accepted: 08/16/2022] [Indexed: 11/09/2022]
Abstract
Hypertension-mediated organ damage (HMOD) at cardiac level include a variety of abnormal phenotypes of recognized adverse prognostic value. Although the risk of cardiac HMOD is related with the severity of BP elevation, the interaction of numerous non-hemodynamic factors plays a relevant role in this unfavorable dynamic process. In particular, sex-related differences in cardiovascular (CV) risk factors and HMOD have been increasingly described. The objective of the present review is to provide comprehensive, updated information on sex-related differences in cardiac HMOD, focusing on the most important manifestations of subclinical hypertensive heart disease such as left ventricular hypertrophy (LVH), LV systolic and diastolic dysfunction, left atrial and aortic dilatation. Current evidence, based on cross-sectional and longitudinal observational studies as well as real-world registries and randomized controlled trials, suggests that women are more at risk of developing (and maintaining) LVH, concentric remodeling and subclinical LV dysfunction, namely the morpho-functional features of heart failure with preserved ejection fraction. It should be pointed out, however, that further studies are needed to fill the gap in defining gender-based optimal therapeutic strategies in order to protect women's hearts.
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Affiliation(s)
- Cesare Cuspidi
- Department of Medicine and Surgery, University of Milano-Bicocca, Milano, Italy.
| | - Elisa Gherbesi
- Department of Clinical Sciences and Community Health, University of Milano and Fondazione Ospedale Maggiore IRCCS Policlinico di Milano, Milano, Italy
| | - Carla Sala
- Department of Clinical Sciences and Community Health, University of Milano and Fondazione Ospedale Maggiore IRCCS Policlinico di Milano, Milano, Italy
| | - Marijana Tadic
- Department of Cardiology, University Hospital "Dr. Dragisa Misovic-Dedinje", Belgrade, Serbia
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2
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Clinical Data, Chest Radiograph and Electrocardiography in the Screening for Left Ventricular Hypertrophy: The CAR 2E 2 Score. J Clin Med 2022; 11:jcm11133585. [PMID: 35806872 PMCID: PMC9267780 DOI: 10.3390/jcm11133585] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2022] [Revised: 06/10/2022] [Accepted: 06/16/2022] [Indexed: 11/16/2022] Open
Abstract
Left ventricular hypertrophy (LVH) is associated with adverse clinical outcomes and implicates clinical decision-making. The aim of our study was to assess the importance of different approaches in the screening for LVH. We included patients who underwent cardiac magnetic resonance (CMR) imaging and had available chest radiograph in medical documentation. Cardiothoracic ratio (CTR), transverse cardiac diameter (TCD), clinical and selected electrocardiographic (ECG)-LVH data, including the Peguero-Lo Presti criterion, were assessed. CMR−LVH was defined based on indexed left ventricular mass-to-body surface area. Receiver operating characteristics analyses showed that both the CTR and TCD (CTR: area under the curve: [AUC] = 0.857, p < 0.001; TCD: AUC = 0.788, p = 0.001) were predictors for CMR−LVH. However, analyses have shown that diagnoses made with TCD, but not CTR, were consistent with CMR−LVH. From the analyzed ECG−LVH criteria, the Peguero-Lo Presti criterion was the best predictor of LVH. The best sensitivity for screening for LVH was observed when the presence of heart failure, ≥40 years in age (each is assigned 1 point), increased TCD and positive Peguero-Lo Presti criterion (each is assigned 2 points) were combined (CAR2E2 score ≥ 3 points). CAR2E2 score may improve prediction of LVH compared to other approaches. Therefore, it may be useful in the screening for LVH in everyday clinical practice in patients with prevalent cardiovascular diseases.
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Hara A, Tsujiguchi H, Suzuki K, Suzuki F, Kasahara T, Oanh PK, Miyagi S, Kannon T, Tajima A, Wada T, Nakamura H. Gender difference in the association of dietary intake of antioxidant vitamins with kidney function in middle-aged and elderly Japanese. J Nutr Sci 2021; 10:e2. [PMID: 33889385 PMCID: PMC8057365 DOI: 10.1017/jns.2020.54] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2020] [Accepted: 11/17/2020] [Indexed: 12/29/2022] Open
Abstract
Dietary intake modification is important for the treatment of chronic kidney disease (CKD); however, little is known about the association between dietary intake of antioxidant vitamins and kidney function based on gender difference. We examined the relationship of dietary intake of antioxidant vitamins with decreased kidney function according to gender in Japanese subjects. This population-based, cross-sectional study included 936 Japanese participants with the age of 40 years or older. A validated brief self-administered diet history questionnaire was used to measure dietary intakes of vitamin E and its four isoforms, vitamin A and vitamin C. Decreased kidney function was defined as estimated glomerular filtration rate <60 ml/min/1·73 m2. A total of 498 (53·2 %) of the study participants were women. Mean age was 62·4 ± 11·3 years. Overall, 157 subjects met the criteria of decreased kidney function. In the fully adjusted model, a high vitamin E intake is inversely associated with decreased kidney function in women (odds ratio, 0·886; 95 % confidence interval, 0·786-0·998), whereas vitamin E intake was not associated with decreased kidney function (odds ratio, 0·931; 95 % confidence interval, 0·811-1·069) in men. No significant association between dietary intake of vitamins A and C and decreased kidney function was observed in women and men. Higher dietary intake of vitamin E was inversely associated with decreased kidney function in middle-aged and older women, and the result may provide insight into the more tailored dietary approaches to prevent CKD.
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Affiliation(s)
- Akinori Hara
- Department of Environmental and Preventive Medicine, Faculty of Medicine, Institute of Medical, Pharmaceutical and Health Sciences, Kanazawa University, Kanazawa, Japan
- Division of Nephrology, Kanazawa University Hospital, Kanazawa, Japan
| | - Hiromasa Tsujiguchi
- Department of Environmental and Preventive Medicine, Faculty of Medicine, Institute of Medical, Pharmaceutical and Health Sciences, Kanazawa University, Kanazawa, Japan
| | - Keita Suzuki
- Department of Environmental and Preventive Medicine, Faculty of Medicine, Institute of Medical, Pharmaceutical and Health Sciences, Kanazawa University, Kanazawa, Japan
| | - Fumihiko Suzuki
- Department of Environmental and Preventive Medicine, Faculty of Medicine, Institute of Medical, Pharmaceutical and Health Sciences, Kanazawa University, Kanazawa, Japan
| | - Tomoko Kasahara
- Department of Environmental and Preventive Medicine, Faculty of Medicine, Institute of Medical, Pharmaceutical and Health Sciences, Kanazawa University, Kanazawa, Japan
| | - Pham Kim Oanh
- Department of Environmental and Preventive Medicine, Faculty of Medicine, Institute of Medical, Pharmaceutical and Health Sciences, Kanazawa University, Kanazawa, Japan
| | - Sakae Miyagi
- Department of Environmental and Preventive Medicine, Faculty of Medicine, Institute of Medical, Pharmaceutical and Health Sciences, Kanazawa University, Kanazawa, Japan
| | - Takayuki Kannon
- Department of Bioinformatics and Genomics, Faculty of Medicine, Institute of Medical, Pharmaceutical and Health Sciences, Kanazawa University, Kanazawa, Japan
| | - Atsushi Tajima
- Department of Bioinformatics and Genomics, Faculty of Medicine, Institute of Medical, Pharmaceutical and Health Sciences, Kanazawa University, Kanazawa, Japan
| | - Takashi Wada
- Division of Nephrology, Kanazawa University Hospital, Kanazawa, Japan
- Department of Nephrology and Laboratory Medicine, Faculty of Medicine, Institute of Medical, Pharmaceutical and Health Sciences, Kanazawa University, Kanazawa, Japan
| | - Hiroyuki Nakamura
- Department of Environmental and Preventive Medicine, Faculty of Medicine, Institute of Medical, Pharmaceutical and Health Sciences, Kanazawa University, Kanazawa, Japan
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4
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The Japanese Society of Hypertension Guidelines for the Management of Hypertension (JSH 2019). Hypertens Res 2020; 42:1235-1481. [PMID: 31375757 DOI: 10.1038/s41440-019-0284-9] [Citation(s) in RCA: 995] [Impact Index Per Article: 248.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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de Hartog-Keyzer JML, El Messaoudi S, Harskamp R, Vart P, Ringoir L, Pop V, Nijveldt R. Electrocardiography for the detection of left ventricular hypertrophy in an elderly population with long-standing hypertension in primary care: a secondary analysis of the CHELLO cohort study. BMJ Open 2020; 10:e038824. [PMID: 32819998 PMCID: PMC7443300 DOI: 10.1136/bmjopen-2020-038824] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
OBJECTIVES To investigate: (1) the prevalence of left ventricular hypertrophy (LVH) in elderly primary care patients with long-standing asymptomatic hypertension, and (2) the diagnostic value of ECG as a screening tool in the detection of LVH compared with echocardiography in this specific patient population. DESIGN AND SETTINGS A cross-sectional study in five general practices in the south-east of the Netherlands. PARTICIPANTS Patients with primary care-managed hypertension, aged between 60 and 85 years, without known heart failure. PRIMARY AND SECONDARY OUTCOME MEASURES Between June 2010 and January 2013, the patients underwent structured interviews, blood pressure assessment, laboratory testing, ECGs and echocardiograms. The primary outcome was to investigate the ability of ECG to detect LVH, compared with echocardiography as a reference test (gold standard). RESULTS Four hundred and twenty-two patients (44% male; ages 70±7 years) who underwent ECG and echocardiographic assessment to determine LVH were included. The median duration of hypertension was 10 (4-15) years. The overall prevalence of LVH was 44%, which increased with age (p<0.001); up to 60% of patients were ≥75 years. ECG intimated LVH in 47 patients (11%) but in only 26 of those (55%) was LVH confirmed by echocardiography. The sensitivity of ECG for detecting LVH was poor (14%). CONCLUSIONS Asymptomatic primary care patients with long-standing hypertension have a high prevalence of previously undetected LVH, which increases with age. ECG is inadequate for detecting LVH in these patients. Early detection of LVH could potentially create more awareness for the optimal regulation of hypertension and compliance to therapy. Therefore, echocardiography should be considered a screening device for the detection of LVH in this population.
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Affiliation(s)
| | | | - Ralf Harskamp
- Department of General Practice, Amsterdam UMC, Amsterdam, The Netherlands
| | - Priya Vart
- Department of Cardiology, Radboudumc, Nijmegen, The Netherlands
- Health Evidence, Radboudumc, Nijmegen, The Netherlands
| | | | - Victor Pop
- Department of Medical Health Psychology, Tilburg University, Tilburg, The Netherlands
| | - Robin Nijveldt
- Department of Cardiology, Radboudumc, Nijmegen, The Netherlands
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You Z, He T, Ding Y, Yang L, Jiang X, Huang L. Predictive value of electrocardiographic left ventricular hypertrophy in the general population: A meta-analysis. J Electrocardiol 2020; 62:14-19. [PMID: 32745730 DOI: 10.1016/j.jelectrocard.2020.07.001] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2020] [Revised: 07/07/2020] [Accepted: 07/08/2020] [Indexed: 12/31/2022]
Abstract
BACKGROUND Conflicting results have been reported on the predictive value of the electrocardiographic left ventricular hypertrophy (LVH) in the general population. This meta-analysis sought to compare the predictive value of different electrocardiographic criteria of LVH in the general population. METHODS We comprehensively searched PubMed and Embase databases until May 9, 2020 to identify observational studies investigating the predictive value of different electrocardiographic criteria for LVH (Sokolow-Lyon voltage, Cornell voltage or Cornell product) in the general population. Outcome measures were major adverse cardiovascular events (MACEs), cardiovascular or all-cause mortality. RESULTS Ten studies enrolling 58,400 individuals were included. Comparison with and without electrocardiographic LVH, the pooled risk ratio (RR) of MACEs was 1.62 (95% confidence interval [CI] 1.40-1.89) for the Sokolow-Lyon voltage criteria, 1.70 (95% CI 1.27-2.29) for the Cornell voltage criteria, and 1.56 (95% CI 1.17-2) for the Cornell product criteria. The pooled RR of all-cause mortality was 1.47 (95% CI 1.10-1.97) for the Sokolow-Lyon voltage criteria and 1.87 (95% CI 1.29-2.71) for the Cornell voltage criteria. Furthermore, the pooled RR of cardiovascular mortality was 1.38 (95% CI 1.19-1.60) for the Sokolow-Lyon criteria, 1.66 (95% CI 1.24-2.33) for the Cornell voltage criteria, and 1.82 (95% CI 0.65-5.09) for the Cornell product criteria. CONCLUSIONS Different electrocardiographic criteria for evaluating LVH had a similar value in predicting MACEs among the general population. LVH detected by the Cornell voltage appeared to have a stronger predictive value in prediction of cardiovascular or all-cause mortality.
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Affiliation(s)
- Zhigang You
- Department of Cardiovascular Medicine, The Second Affiliated Hospital of Nanchang University, 330006, China
| | - Ting He
- Department of Cardiovascular Medicine, The Second Affiliated Hospital of Nanchang University, 330006, China
| | - Ying Ding
- Department of Cardiovascular Medicine, The Second Affiliated Hospital of Nanchang University, 330006, China
| | - Lu Yang
- Department of Cardiovascular Medicine, The Second Affiliated Hospital of Nanchang University, 330006, China
| | - Xinghua Jiang
- Department of Cardiovascular Medicine, The Second Affiliated Hospital of Nanchang University, 330006, China
| | - Lin Huang
- Department of Cardiovascular Medicine, The Second Affiliated Hospital of Nanchang University, 330006, China.
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Chlabicz M, Jamiołkowski J, Paniczko M, Sowa P, Szpakowicz M, Łapińska M, Jurczuk N, Kondraciuk M, Ptaszyńska-Kopczyńska K, Raczkowski A, Szpakowicz A, Kamiński KA. ECG Indices Poorly Predict Left Ventricular Hypertrophy and Are Applicable Only in Individuals With Low Cardiovascular Risk. J Clin Med 2020; 9:jcm9051364. [PMID: 32384681 PMCID: PMC7290685 DOI: 10.3390/jcm9051364] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2020] [Revised: 04/24/2020] [Accepted: 05/04/2020] [Indexed: 12/22/2022] Open
Abstract
Background: Left ventricular hypertrophy (LVH) is an important risk factor for cardiovascular events. The electrocardiography (ECG) has poor sensitivity, but it is commonly used to detect LVH. Aim: To evaluate the diagnostic efficacy of known ECG indicators to recognize LVH in subgroups with different cardiovascular risk levels. Methods: 676 volunteers were included. Results: We found that 10.2% of the analyzed population had LVH based on echocardiography. Individuals with LVH were older, had a higher body mass index, higher systolic blood pressure, lower heart rate, higher parameters of insulin resistance, higher cardiovascular risk, and android-type obesity. Variables that remained independently associated with LVH were QRS duration, left atrial volume index, troponin T, and hemoglobin A1c. The receiver operating characteristics (ROC) curve analysis of the Sokolow–Lyon index did not show a significant predictive ability to diagnose LVH in the whole study population including all cardiovascular risk classes. The ROC curves analysis of Cornell and Lewis indices showed a modest predictive ability to diagnose LVH in the general population and in a low cardiovascular class. Conclusions: There is a need for new, simple methods to diagnose LVH in the general population in order to properly evaluate cardiovascular risk and introduce optimal medical treatment of concomitant disease.
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Affiliation(s)
- Małgorzata Chlabicz
- Department of Population Medicine and Civilization Diseases Prevention, Medical University of Bialystok, 15-269 Bialystok, Poland; (M.C.); (J.J.); (M.P.); (P.S.); (M.S.); (M.Ł.); (N.J.); (M.K.); (A.R.)
- Department of Invasive Cardiology, Teaching University Hospital of Bialystok, 15-276 Bialystok, Poland
| | - Jacek Jamiołkowski
- Department of Population Medicine and Civilization Diseases Prevention, Medical University of Bialystok, 15-269 Bialystok, Poland; (M.C.); (J.J.); (M.P.); (P.S.); (M.S.); (M.Ł.); (N.J.); (M.K.); (A.R.)
| | - Marlena Paniczko
- Department of Population Medicine and Civilization Diseases Prevention, Medical University of Bialystok, 15-269 Bialystok, Poland; (M.C.); (J.J.); (M.P.); (P.S.); (M.S.); (M.Ł.); (N.J.); (M.K.); (A.R.)
| | - Paweł Sowa
- Department of Population Medicine and Civilization Diseases Prevention, Medical University of Bialystok, 15-269 Bialystok, Poland; (M.C.); (J.J.); (M.P.); (P.S.); (M.S.); (M.Ł.); (N.J.); (M.K.); (A.R.)
| | - Małgorzata Szpakowicz
- Department of Population Medicine and Civilization Diseases Prevention, Medical University of Bialystok, 15-269 Bialystok, Poland; (M.C.); (J.J.); (M.P.); (P.S.); (M.S.); (M.Ł.); (N.J.); (M.K.); (A.R.)
| | - Magda Łapińska
- Department of Population Medicine and Civilization Diseases Prevention, Medical University of Bialystok, 15-269 Bialystok, Poland; (M.C.); (J.J.); (M.P.); (P.S.); (M.S.); (M.Ł.); (N.J.); (M.K.); (A.R.)
| | - Natalia Jurczuk
- Department of Population Medicine and Civilization Diseases Prevention, Medical University of Bialystok, 15-269 Bialystok, Poland; (M.C.); (J.J.); (M.P.); (P.S.); (M.S.); (M.Ł.); (N.J.); (M.K.); (A.R.)
| | - Marcin Kondraciuk
- Department of Population Medicine and Civilization Diseases Prevention, Medical University of Bialystok, 15-269 Bialystok, Poland; (M.C.); (J.J.); (M.P.); (P.S.); (M.S.); (M.Ł.); (N.J.); (M.K.); (A.R.)
| | | | - Andrzej Raczkowski
- Department of Population Medicine and Civilization Diseases Prevention, Medical University of Bialystok, 15-269 Bialystok, Poland; (M.C.); (J.J.); (M.P.); (P.S.); (M.S.); (M.Ł.); (N.J.); (M.K.); (A.R.)
| | - Anna Szpakowicz
- Department of Cardiology, Teaching University Hospital of Bialystok, 15-276 Bialystok, Poland; (K.P.-K.); (A.S.)
| | - Karol Adam Kamiński
- Department of Population Medicine and Civilization Diseases Prevention, Medical University of Bialystok, 15-269 Bialystok, Poland; (M.C.); (J.J.); (M.P.); (P.S.); (M.S.); (M.Ł.); (N.J.); (M.K.); (A.R.)
- Department of Cardiology, Teaching University Hospital of Bialystok, 15-276 Bialystok, Poland; (K.P.-K.); (A.S.)
- Correspondence: ; Tel.: +48-856-865-371
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Inoue T, Arima H, Katsuimata Y, Iseki C, Kinjo K, Iseki K. Development of Electrocardiographic Left Ventricular Hypertrophy and Resting Heart Rate Over Time: Findings From the OGHMA Study. Angiology 2019; 71:70-76. [PMID: 31446774 DOI: 10.1177/0003319719870950] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Both elevated resting heart rate (HR) and electrocardiographic left ventricular hypertrophy (ECG-LVH) are signs of a poor prognosis. Although elevated resting HR is a known risk factor for cardiovascular disease and target organ damage, the association between resting HR and the development of ECG-LVH is unclear. In the present study, 6860 subjects (4203 men, 2657 women, 19-89 years of age) without ECG-LVH at baseline were evaluated and followed for a mean duration of 3.7±1.4 years. During the follow-up period, 484 (7.1%) subjects developed ECG-LVH. Cox regression analysis revealed that each 10 beats/min increase in resting HR was associated with a 22% reduction in the development of ECG-LVH (95% confidence interval: 12%-30%, P < .0001) in men. While an increase in HR tended to be associated with the development of ECG-LVH in women, the relationship was not significant. In contrast to the concept that an elevated resting HR is a cardiovascular risk factor, these findings revealed that resting HR was negatively associated with the development of ECG-LVH in men.
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Affiliation(s)
- Taku Inoue
- Cardiovascular Medicine, Nambu Hospital, Okinawa, Japan.,Department of Preventive Medicine and Public Health, Fukuoka University, Fukuoka, Japan
| | - Hisatomi Arima
- Department of Preventive Medicine and Public Health, Fukuoka University, Fukuoka, Japan
| | | | - Chiho Iseki
- Okinawa Heart and Renal Association, Okinawa, Japan
| | - Kozen Kinjo
- Okinawa Health Promotion Foundation, Okinawa, Japan
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Narita M, Yamada M, Tsushima M, Kudo N, Kato T, Yokono Y, Toyama Y, Senoo M, Yonekura M, Narita N, Kimura Y, Sawada K, Tokuda I, Tomita H. Novel Electrocardiographic Criteria for the Diagnosis of Left Ventricular Hypertrophy in the Japanese General Population. Int Heart J 2019; 60:679-687. [DOI: 10.1536/ihj.18-511] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Affiliation(s)
- Masato Narita
- Department of Cardiology, Hirosaki University Graduate School of Medicine
| | - Masahiro Yamada
- Department of Cardiology, Hirosaki University Graduate School of Medicine
| | - Michiko Tsushima
- Department of Cardiology, Hirosaki University Graduate School of Medicine
| | - Natsumi Kudo
- Department of Cardiology, Hirosaki University Graduate School of Medicine
| | - Tomo Kato
- Department of Cardiology, Hirosaki University Graduate School of Medicine
| | - Yoshikazu Yokono
- Department of Cardiology, Hirosaki University Graduate School of Medicine
| | - Yuichi Toyama
- Department of Cardiology, Hirosaki University Graduate School of Medicine
| | - Maiko Senoo
- Department of Cardiology, Hirosaki University Graduate School of Medicine
| | - Manabu Yonekura
- Department of Cardiology, Hirosaki University Graduate School of Medicine
| | - Noritomo Narita
- Department of Cardiology, Hirosaki University Graduate School of Medicine
| | - Yoshihiro Kimura
- Department of Cardiology, Hirosaki University Graduate School of Medicine
| | - Kaori Sawada
- Department of Social Medicine, Hirosaki University Graduate School of Medicine
| | - Itoyo Tokuda
- Department of Social Medicine, Hirosaki University Graduate School of Medicine
- Department of Oral Health Care, Hirosaki University Graduate School of Medicine
| | - Hirofumi Tomita
- Department of Cardiology, Hirosaki University Graduate School of Medicine
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