Clinical Profiles of Hypertrophic Cardiomyopathy With Apical Phenotype Comparison of Pure-Apical Form and Distal-Dominant Form
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- Kubo Toru
- Department of Medicine and Geriatrics, Kochi Medical School
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- Kitaoka Hiroaki
- Department of Medicine and Geriatrics, Kochi Medical School
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- Okawa Makoto
- Department of Medicine and Geriatrics, Kochi Medical School
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- Hirota Takayoshi
- Department of Medicine and Geriatrics, Kochi Medical School
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- Hoshikawa Eri
- Department of Medicine and Geriatrics, Kochi Medical School
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- Hayato Kayo
- Department of Medicine and Geriatrics, Kochi Medical School
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- Yamasaki Naohito
- Department of Medicine and Geriatrics, Kochi Medical School
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- Matsumura Yoshihisa
- Department of Medicine and Geriatrics, Kochi Medical School
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- Yabe Toshikazu
- Department of Medicine and Geriatrics, Kochi Medical School
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- Nishinaga Masanori
- Department of Medicine and Geriatrics, Kochi Medical School
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- Takata Jun
- Department of Medicine and Geriatrics, Kochi Medical School
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- Doi Yoshinori L.
- Department of Medicine and Geriatrics, Kochi Medical School
Bibliographic Information
- Other Title
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- Clinical profiles of hypertrophic cardiomyopathy with apical phenotype—comparison of pure-apical form and distal-dominant form
- Comparison of Pure-Apical Form and Distal-Dominant Form
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Abstract
Background: Hypertrophic cardiomyopathy (HCM) with an apical phenotype, in which hypertrophy of the myocardium predominantly involves the apex of the left ventricle, is not uncommon in Japan, but its morphologic variations are not well recognized. The aim of this study was to investigate if these variations have different clinical characteristics although they are still confused to be the same. Methods and Results: Patients with the apical phenotype were divided into 2 groups, the "pure-apical" form and the "distal-dominant" form, and their clinical profiles were compared. From the study cohort of 264 patients with HCM, 80 (30%) were classified as having the apical phenotype: 51 with the pure-apical form and 29 with the distal-dominant form. The age at diagnosis was approximately 60 years, and in both groups the majority were male. The distal-dominant group had a significantly larger left atrial diameter (43 vs 39 mm) and higher ratio of proven familial HCM (28 vs 6%), and were more symptomatic (New York Heart Association ≥3) at presentation (17 vs 0%). The event-free rate of cardiovascular events in patients with the distal-dominant form was significantly worse (log-rank P=0.012) than that in patients with the pure-apical form (follow-up period: ≈5 years). Conclusions: The 2 phenotypes of apical HCM should be recognized and distinguished clinically. (Circ J 2009; 73: 2330-2336)<br>
Journal
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- Circulation Journal
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Circulation Journal 73 (12), 2330-2336, 2009
The Japanese Circulation Society
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Keywords
Details 詳細情報について
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- CRID
- 1390282680079275008
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- NII Article ID
- 10025938627
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- NII Book ID
- AA11591968
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- ISSN
- 13474820
- 13469843
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- Text Lang
- en
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- Data Source
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- JaLC
- Crossref
- CiNii Articles
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- Abstract License Flag
- Disallowed