Usefulness of a Novel Ultrasound Transducer for Continuous Monitoring Treadmill Exercise Echocardiography to Assess Coronary Artery Disease

Kenichi Nakashiki; Akira Kisanuki; Yutaka Otsuji; Shiro Yoshifuku; Toshinori Yuasa; Kunitsugu Takasaki; Eiji Kuwahara; Bo Yu; Takeshi Uemura; Naoko Mizukami; Shuichi Hamasaki; Shinichi Minagoe; Chuwa Tei

doi:10.1253/circj.70.1297

Clinical Investigation

Usefulness of a Novel Ultrasound Transducer for Continuous Monitoring Treadmill Exercise Echocardiography to Assess Coronary Artery Disease

Kenichi Nakashiki, Akira Kisanuki, Yutaka Otsuji, Shiro Yoshifuku, Toshinori Yuasa, Kunitsugu Takasaki, Eiji Kuwahara, Bo Yu, Takeshi Uemura, Naoko Mizukami, Shuichi Hamasaki, Shinichi Minagoe, Chuwa Tei

Author information

Kenichi Nakashiki
Department of Cardiovascular Medicine, Kagoshima University Hospital, Kagoshima University
Akira Kisanuki
Department of Cardiovascular Medicine, Kagoshima University Hospital, Kagoshima University
Yutaka Otsuji
Department of Cardiovascular Medicine, Kagoshima University Hospital, Kagoshima University
Shiro Yoshifuku
Department of Cardiovascular Medicine, Kagoshima University Hospital, Kagoshima University
Toshinori Yuasa
Department of Cardiovascular Medicine, Kagoshima University Hospital, Kagoshima University
Kunitsugu Takasaki
Department of Cardiovascular Medicine, Kagoshima University Hospital, Kagoshima University
Eiji Kuwahara
Department of Cardiovascular Medicine, Kagoshima University Hospital, Kagoshima University
Bo Yu
Department of Cardiovascular Medicine, Kagoshima University Hospital, Kagoshima University
Takeshi Uemura
Department of Cardiovascular Medicine, Kagoshima University Hospital, Kagoshima University
Naoko Mizukami
Department of Cardiovascular Medicine, Kagoshima University Hospital, Kagoshima University
Shuichi Hamasaki
Department of Cardiovascular Medicine, Kagoshima University Hospital, Kagoshima University
Shinichi Minagoe
Department of Cardiovascular Medicine, Kagoshima University Hospital, Kagoshima University
Chuwa Tei
Department of Cardiovascular Medicine, Kagoshima University Hospital, Kagoshima University

Keywords: Coronary artery disease, Stress echocardiography, Treadmill exercise test

JOURNAL FREE ACCESS

2006 Volume 70 Issue 10 Pages 1297-1302

DOI https://doi.org/10.1253/circj.70.1297

Details

Abstract

Background The feasibility of a novel ultrasound probe, which can be attached to the left ventricular (LV) apex chest wall and allows free rotation around its long axis direction for the continuous monitoring of LV wall motion, was tested. Methods and Results There were 36 subjects who had coronary artery disease (CAD). By attaching a novel ultrasound probe to the chest wall, the LV apical views were recorded during treadmill exercise stress echocardiography (Echo). The continuous monitoring of LV wall motion was satisfactorily feasible in 30 of 36 patients. The visualization rate of the overall LV segments was higher at rest (90%) compared to that during peak exercise (77%). The segments were better visualized in apical portions (90-100%) than in mid (77-96%) or basal portions (68-87%). The sensitivity, specificity, and accuracy for detecting CAD were 61, 100 and 77%, respectively. The wall motion score index 3 and 6 min after exercise decreased significantly compared to those at peak exercise. The number of segments with dyssynergy was highest at the peak exercise. Ischemic ST-T depression on electrocardiography was observed only at peak stress periods. Conclusions Continuous monitoring treadmill exercise Echo using a novel ultrasound probe seems feasible for the non-invasive and physiological assessment of CAD. (Circ J 2006; 70: 1297 - 1302)

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