Multicenter investigations of the prevalence of abdominal aortic aneurysm in elderly Japanese patients with hypertension

The AAA Japan study

Shota Fukuda, Hiroyuki Watanabe, Katsuomi Iwakura, Masao Daimon, Hiroshi Itoh, Junichi Yoshikawa

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

Background: Physical examination as an initial screening tool to diagnose abdominal aortic aneurysm (AAA) has lost favor over the past 20 years. This multicenter cohort study aimed to determine the prevalence of AAA in elderly Japanese patients with hypertension (HT) and to clarify the diagnostic accuracy of physical examination using a pocket-sized ultrasound imaging device (the “pocket-echo”). Methods and Results: A total of 1,731 patients with HT aged >60 years from 20 collaborating institutions were enrolled in this study. Abdominal palpation was performed on physical examination, and the pocket-echo was used to confirm the diagnosis of AAA. The abdominal aorta was well visualized in 1,692 patients (98%). AAA was discovered in 69 patients (4.1%), with advanced age and male sex identified as independent risk factors. The prevalence of AAA increased according to age regardless of sex, and reached 9.2% and 5.7%, respectively, in males and females ≥80 years. Overall, 33 cases of AAA were missed on abdominal palpation (sensitivity, 52%), whereas for AAAs >40 mm, the sensitivity was 75%. Conclusions: We assessed the utility of the pocket-echo and physical examination for diagnosing AAA in Japanese patients with HT aged over 60 years. Our findings highlight the importance of AAA screening programs in high-risk Japanese populations, and confirm the ability of physical examination to detect large, but not small, AAAs.

Original languageEnglish
Pages (from-to)524-529
Number of pages6
JournalCirculation Journal
Volume79
Issue number3
DOIs
Publication statusPublished - 2015

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Abdominal Aortic Aneurysm
Japan
Hypertension
Physical Examination
Palpation
Abdominal Aorta
Multicenter Studies
Ultrasonography
Cohort Studies
Equipment and Supplies
Population

Keywords

  • Aorta
  • Echocardiography
  • Hypertension

ASJC Scopus subject areas

  • Cardiology and Cardiovascular Medicine
  • Medicine(all)

Cite this

Multicenter investigations of the prevalence of abdominal aortic aneurysm in elderly Japanese patients with hypertension : The AAA Japan study. / Fukuda, Shota; Watanabe, Hiroyuki; Iwakura, Katsuomi; Daimon, Masao; Itoh, Hiroshi; Yoshikawa, Junichi.

In: Circulation Journal, Vol. 79, No. 3, 2015, p. 524-529.

Research output: Contribution to journalArticle

Fukuda, Shota ; Watanabe, Hiroyuki ; Iwakura, Katsuomi ; Daimon, Masao ; Itoh, Hiroshi ; Yoshikawa, Junichi. / Multicenter investigations of the prevalence of abdominal aortic aneurysm in elderly Japanese patients with hypertension : The AAA Japan study. In: Circulation Journal. 2015 ; Vol. 79, No. 3. pp. 524-529.
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